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Reykjanes / Svartsengi

Seismicity by period · derived statistics from Skjálftalísa (Icelandic Met Office)
Status (automatic)
In the last 24 hours, 5 earthquakes were measured in the Reykjanes system at Svartsengi, which is a fissure system at the tip of the Reykjanes Peninsula. The activity is similar to the past week but within what is normal for this area. The largest earthquake in the last 48 hours was M0.3, and the cumulative moment of earthquakes over the same period was Mw 0.6. GNSS uplift shows rapid, step-like deformations associated with eruption cycles. Results are automatic preliminary results.
VONA (Reykjanes): Yellow (unchanged since 2025-08-05) · source
Volcano is experiencing signs of elevated unrest above known background levels.
VONA = Volcano Observatory Notice for Aviation; the official Met Office colour code for aviation. Independent of Skjálfti's automatic analysis.
Depth — 3D and cross-section Reykjanes Peninsula · last 90 days
Each dot is an earthquake, depth as the third dimension — Reykjanes Peninsula, last 90 days. Drag the 3D view to rotate; point at a dot for details.
3D (rotatable) · depth ×2.5
Cross-section — distance along profile (km) vs depth (km)
Map (top view)
<24 klst2–7 dolderunconstrained depthsize ∝ magnitude (M)
⚠ Preliminary depths, unreliable (automatic Met Office solutions; depth often poorly constrained). events with unconstrained (default) depth shown as open rings — not real structure. For illustration, not analysis.
🕰️ Last eruption / event — 14 months ago
Eruption 9 at Sundhnúkur fissure (2025-07-16). Part of the active period since Dec 2023 (9 dike intrusions, 7 surfaced). Current cycle is the longest — uplift now exceeds 5× the median of previous cycles.
Fissure system at the western tip of the Reykjanes Peninsula. Svartsengi/Sundhnúkur has erupted repeatedly since December 2023 with magma dike intrusions by Grindavík (basaltic fissure eruptions). Intense seismicity and uplift. (overview — more at vedur.is) · circle on the map = rough outline of the system (radius).
📜 Did you know?
Since December 2023, nine dike intrusions have occurred at Sundhnúkur, seven reaching the surface. This is the first active period on Reykjanes in about 800 years — the last comparable was the Reykjaneseldar of 1210-1240.
Historical eruptions in the system — points colored by size, blue circle shows where we are now in time.
Sundhnúksgosa-cycle201920202021202220232024202520262027202820292030G4G5G6G7G9nowsmallmediumlarge
❓ What if another eruption starts at Sundhnúkur?
Timeline: Likely 30 minutes to hours between first seismic precursors (M3+ swarm) and surface eruption. Seven of nine recent dike intrusions reached the surface as eruptions. Impact: Lava front advances at 1-20 m/h in worst phases (Sundhnúkur eruptions recorded front speeds of 0.3-1.5 m/s right after onset), can reach the sea. The town has been evacuated multiple times — renewed evacuation likely. Blue Lagoon and Svartsengi power plant are at risk (partial protective berm already built). Reykjanes road (highway to Keflavík airport) probably stays open, depending on eruption location. Sulphur dioxide (SO₂) from new vent affects Reykjavík air quality when wind is northerly. Sources: Experience from 7 prior eruptions (2023-2025), Met Office hazard maps.
This is not a forecast. Based on historical experience and official hazard assessments from the Met Office / Civil Protection.
☁ Air quality — SO₂
Real-time SO₂ from Environment Agency (2026-09-11T18:00 UTC). Yellow > 20 µg/m³, orange > 125 (health threshold), red > 350. Nearest stations to this system; past 24h shown for the highest.
Grindavík9.6 µg/m³
Sandgerði7.0 µg/m³
Vogar4.9 µg/m³
Ásbrú (Keflavík)4.4 µg/m³
Keflavík (Vatnaveröld)3.5 µg/m³
2019:0023:0003:0007:0011:0015:00
Points = earthquake locations in the selected window, coloured by magnitude: M3+ · M2+ · smaller (a sample if more than 800).
Earthquakes
6
Largest
M0.3
M3,0+
0
Depth range
0–6 km
Earthquakes over time
219:2500:1305:0109:4914:3719:25
Cumulative count · 6 earthquakes · total moment ≈ M0.6 · count moment
n=60M0.6019:2500:1305:0109:4914:3719:25
Depth (0 km at top). Grey: fixed depth.
0km3km6km19:2500:1305:0109:4914:3719:25
Magnitude distribution
6<101–202–303–40≥4
Depth cross-sections — color by age (orange=newest, grey=older), point size by M. Rising cluster = possible magma intrusion.
0km3km6km22.70°W22.63°W22.57°W22.51°W22.45°WE-W
0km3km6km63.81°N63.82°N63.83°N63.85°N63.86°NN-S
Earthquakes
6
Largest
M0.3
M3,0+
0
Depth range
0–6 km
Earthquakes over time
209.0910.0910.0911.0911.0911.09
Cumulative count · 6 earthquakes · total moment ≈ M0.6 · count moment
n=60M0.6009.0910.0910.0911.0911.0911.09
Depth (0 km at top). Grey: fixed depth.
0km3km6km09.0910.0910.0911.0911.0911.09
Magnitude distribution
6<101–202–303–40≥4
Depth cross-sections — color by age (orange=newest, grey=older), point size by M. Rising cluster = possible magma intrusion.
0km3km6km22.70°W22.63°W22.57°W22.51°W22.45°WE-W
0km3km6km63.81°N63.82°N63.83°N63.85°N63.86°NN-S
Earthquakes
31
Largest
M1.5
M3,0+
0
Depth range
0–27 km
Earthquakes over time
404.0906.0907.0909.0910.0911.09
Cumulative count · 31 earthquakes · total moment ≈ M1.7 · count moment
n=310M1.7004.0906.0907.0909.0910.0911.09
No significant hypocenter migration — activity is stationary (R²=0.00, n=31); no sign of a propagating dike. Migration shows automatically if R²≥0.30.
Depth (0 km at top). Grey: fixed depth.
0km14km27km04.0906.0907.0909.0910.0911.09
Magnitude distribution
29<121–202–303–40≥4
Depth cross-sections — color by age (orange=newest, grey=older), point size by M. Rising cluster = possible magma intrusion.
0km14km27km22.71°W22.63°W22.55°W22.46°W22.38°WE-W
0km14km27km63.80°N63.82°N63.84°N63.86°N63.88°NN-S
Earthquakes
119
Largest
M1.5
M3,0+
0
Depth range
0–27 km
Earthquakes over time
1212.0818.0824.0830.0805.0911.09
Cumulative count · 119 earthquakes · total moment ≈ M1.8 · count moment
n=1190M1.8012.0818.0824.0830.0805.0911.09
Depth (0 km at top). Grey: fixed depth.
0km14km27km12.0818.0824.0830.0805.0911.09
Magnitude distribution
115<141–202–303–40≥4
Depth cross-sections — color by age (orange=newest, grey=older), point size by M. Rising cluster = possible magma intrusion.
0km14km27km22.71°W22.63°W22.54°W22.46°W22.37°WE-W
0km14km27km63.79°N63.82°N63.84°N63.87°N63.90°NN-S
Earthquakes
357
Largest
M2.8
M3,0+
0
Depth range
0–27 km
Earthquakes over time
6313.0601.0719.0706.0824.0811.09
Cumulative count · 357 earthquakes · total moment ≈ M2.8 · count moment
n=3570M2.8013.0601.0719.0706.0824.0811.09
Depth (0 km at top). Grey: fixed depth.
0km14km27km13.0601.0719.0706.0824.0811.09
Magnitude distribution
347<191–212–303–40≥4
Depth cross-sections — color by age (orange=newest, grey=older), point size by M. Rising cluster = possible magma intrusion.
0km14km27km22.71°W22.63°W22.54°W22.46°W22.37°WE-W
0km14km27km63.79°N63.82°N63.85°N63.88°N63.91°NN-S
Earthquakes
575
Largest
M2.8
M3,0+
0
Depth range
0–27 km
Earthquakes over time
7015.0320.0426.0501.0706.0811.09
Cumulative count · 575 earthquakes · total moment ≈ M2.8 · count moment
n=5750M2.8015.0320.0426.0501.0706.0811.09
Depth (0 km at top). Grey: fixed depth.
0km14km27km15.0320.0426.0501.0706.0811.09
Magnitude distribution
555<1191–212–303–40≥4
Depth cross-sections — color by age (orange=newest, grey=older), point size by M. Rising cluster = possible magma intrusion.
0km14km27km22.72°W22.63°W22.54°W22.46°W22.37°WE-W
0km14km27km63.79°N63.82°N63.85°N63.88°N63.91°NN-S
Earthquakes
943
Largest
M2.8
M3,0+
0
Depth range
0–27 km
Earthquakes over time
7611.0923.1104.0218.0430.0611.09
Cumulative count · 943 earthquakes · total moment ≈ M2.9 · count moment
n=9430M2.9011.0923.1104.0218.0430.0611.09
Depth (0 km at top). Grey: fixed depth.
0km14km27km11.0923.1104.0218.0430.0611.09
Magnitude distribution
800<1311–212–303–40≥4
Depth cross-sections — color by age (orange=newest, grey=older), point size by M. Rising cluster = possible magma intrusion.
0km14km27km22.72°W22.63°W22.54°W22.46°W22.37°WE-W
0km14km27km63.79°N63.82°N63.85°N63.89°N63.92°NN-S
Note: before February 2026 about half of events lacked an automatic magnitude, so magnitude-dependent figures (b-value, count of M≥X) under-count earlier periods — the catalogue is not homogeneous across this window. Cumulative moment is barely affected.
Earthquakes
3973
Largest
M3.6
M3,0+
6
Depth range
0–27 km
Earthquakes over time
62209.202402.202506.202511.202504.202609.2026
Cumulative count · 3973 earthquakes · total moment ≈ M4.0 · count moment
n=39730M4.0011.0904.0230.0623.1118.0411.09
Depth (0 km at top). Grey: fixed depth.
0km10km20km11.0904.0230.0623.1118.0411.09
Magnitude distribution
1895<13481–2662–363–40≥4
Depth cross-sections — color by age (orange=newest, grey=older), point size by M. Rising cluster = possible magma intrusion.
0km10km20km22.72°W22.63°W22.54°W22.46°W22.37°WE-W
0km10km20km63.79°N63.84°N63.89°N63.95°N64.00°NN-S
Gutenberg-Richter b ≈ 0.89 ± 0.07 (i.e. likely 0.82–0.95, M≥1.7, n=127)
Note: before February 2026 about half of events lacked an automatic magnitude, so magnitude-dependent figures (b-value, count of M≥X) under-count earlier periods — the catalogue is not homogeneous across this window. Cumulative moment is barely affected.
Earthquakes
86.003
Largest
M5.0
M3.0+
504
Days with data
1.532
This is a reduced view: it is built from the daily aggregate (counts, moment, magnitude bands, depth histogram) rather than individual events. Map points, the depth scatter, cross-sections and the migration fit are therefore missing — they need each event's location and depth. Counts, total moment and the b-value are exact, not approximated.

Earthquakes over time

37605202120222023202420252026

Cumulative count and moment

Mw 5.7n=860030
Total moment of all events in the window equals a single Mw 5.7

Magnitude distribution

<168311
1–211182
2–32302
3–4445
≥459
Gutenberg-Richter b ≈ 0.73 ± 0.01 (i.e. likely 0.72–0.74, M≥1.7, n=4503)
Note: before February 2026 about half of events lacked an automatic magnitude, so magnitude-dependent figures (b-value, count of M≥X) under-count earlier periods — the catalogue is not homogeneous across this window. Cumulative moment is barely affected.
Earthquakes
113.762
Largest
M5.0
M3.0+
630
Days with data
2.542
This is a reduced view: it is built from the daily aggregate (counts, moment, magnitude bands, depth histogram) rather than individual events. Map points, the depth scatter, cross-sections and the migration fit are therefore missing — they need each event's location and depth. Counts, total moment and the b-value are exact, not approximated.

Earthquakes over time

39287201620182020202220242026

Cumulative count and moment

Mw 5.7n=1137620
Total moment of all events in the window equals a single Mw 5.7

Magnitude distribution

<191387
1–214722
2–32975
3–4556
≥474
Gutenberg-Richter b ≈ 0.74 ± 0.01 (i.e. likely 0.73–0.75, M≥1.7, n=5811)
Note: before February 2026 about half of events lacked an automatic magnitude, so magnitude-dependent figures (b-value, count of M≥X) under-count earlier periods — the catalogue is not homogeneous across this window. Cumulative moment is barely affected.
Earthquakes
115.697
Largest
M5.2
M3.0+
661
Days with data
3.140
This is a reduced view: it is built from the daily aggregate (counts, moment, magnitude bands, depth histogram) rather than individual events. Map points, the depth scatter, cross-sections and the migration fit are therefore missing — they need each event's location and depth. Counts, total moment and the b-value are exact, not approximated.

Earthquakes over time

40570200620102014201820222026

Cumulative count and moment

Mw 5.8n=1156970
Total moment of all events in the window equals a single Mw 5.8

Magnitude distribution

<192218
1–215603
2–33167
3–4581
≥480
Gutenberg-Richter b ≈ 0.74 ± 0.01 (i.e. likely 0.73–0.75, M≥1.7, n=6204)
Note: before February 2026 about half of events lacked an automatic magnitude, so magnitude-dependent figures (b-value, count of M≥X) under-count earlier periods — the catalogue is not homogeneous across this window. Cumulative moment is barely affected.
Earthquakes
116.657
Largest
M5.2
M3.0+
667
Days with data
3.659
This is a reduced view: it is built from the daily aggregate (counts, moment, magnitude bands, depth histogram) rather than individual events. Map points, the depth scatter, cross-sections and the migration fit are therefore missing — they need each event's location and depth. Counts, total moment and the b-value are exact, not approximated.

Earthquakes over time

54319199520012007201420202026

Cumulative count and moment

Mw 5.8n=1166570
Total moment of all events in the window equals a single Mw 5.8

Magnitude distribution

<192588
1–216108
2–33245
3–4587
≥480
Gutenberg-Richter b ≈ 0.75 ± 0.01 (i.e. likely 0.74–0.76, M≥1.7, n=6369)
Note: before February 2026 about half of events lacked an automatic magnitude, so magnitude-dependent figures (b-value, count of M≥X) under-count earlier periods — the catalogue is not homogeneous across this window. Cumulative moment is barely affected.

Depth is automatic and uncertain; earthquakes alone do not show magma movement — deformation (GPS) and gas are needed. Grey points: automatic fixed-depth values. b-value computed for M≥1.5 (automatic magnitudes make lower completeness unreliable). Preliminary data.

Glossary & magnitude scale →

Uplift — GNSS deformation

SENG — rapid, step-like deformation (eruption cycles); not a steady annual rate — see chart
+0mm+152mm+303mm11.0920.1130.0110.0420.0629.08
REYK (Reykjavík) — reference ~+0 mm/yr
-25mm+0mm+27mm11.0919.1127.0106.0414.0622.08
Show all stations (N/E/Up + cluster)
SENG — horizontal and vertical displacement (N · E · Up) past 365 d, mm from first reading
+0mm+43mm+87mmN+0mm+17mm+34mmE+0mm+152mm+303mmUp11.09.2520.11.2530.01.2610.04.2620.06.2629.08.26
Þorbjörn/Svartsengi cluster — Up comparison past 365 d, mm from each station's first reading
+0mm+152mm+303mmHS02NBIOORFCSENGSKSH11.09.2520.11.2530.01.2610.04.2620.06.2629.08.26
Advanced uplift analysis (cycle, baseline, Mogi)
Since Gos 9 (2025-07-16): 422 days · +902 mm uplift · +0.0 mm/dag rate — 584% of median prior cycle. Current cycle (orange) overlaid on prior 8 dike-intrusion cycles (grey). 9 dike intrusions since Dec 2023, of which 7 reached the surface as eruptions.
-782mm-11mm+760mmmedian peak of prior cycles (154 mm)0d20d40d60d80d100d120d
Horizontal baseline lengths between SENG and 4 nearest stations past 365 d — mm from first common day. Horizontal only (e,n) to avoid vertical paradox. Increase = stations moving apart = radial outward inflation; decrease = subsidence or contraction. Common-mode filter: atm/geomag noise cancels.
-48mm+49mm+146mmSENG↔HS02SENG↔NBIOSENG↔ORFCSENG↔SKSH11.09.2528.10.2513.12.2529.01.2616.03.2602.05.26
Mogi ΔV(t) — fixed Svartsengi chamber (63.889°N, -22.461°W, depth 4.5 km — Sigmundsson et al. 2024). Past 30-d mean: +1.30 Mm³/30d. Latest day (2026-05-28): +0.73 Mm³ (rms 3.4 mm). Green = good fit (<10 mm), yellow medium, grey poor. Assumptions: point-Mogi, ν=0.25, fixed depth 4.5 km (Sigmundsson et al. 2024). Interpretation: the chamber refills by ~1 cubic megameter (≈1 million m³) per month on average. Sill geometry / shallower depth (Hreinsdóttir 2025) would give ~30% higher ΔV — lower bounds.
-16.6+2.1+20.7Mm³/30d2025-08-01 ΔV=-14.91 Mm³ rms=52.3 mm2025-08-02 ΔV=-14.73 Mm³ rms=53.2 mm2025-08-03 ΔV=-14.58 Mm³ rms=53.1 mm2025-08-04 ΔV=-14.79 Mm³ rms=54.0 mm2025-08-05 ΔV=-14.25 Mm³ rms=54.3 mm2025-08-06 ΔV=-15.06 Mm³ rms=54.3 mm2025-08-07 ΔV=-13.98 Mm³ rms=54.6 mm2025-08-08 ΔV=-14.48 Mm³ rms=54.7 mm2025-08-09 ΔV=-14.77 Mm³ rms=54.7 mm2025-08-10 ΔV=-2.34 Mm³ rms=135.1 mm2025-08-11 ΔV=-14.96 Mm³ rms=53.4 mm2025-08-12 ΔV=-3.09 Mm³ rms=132.1 mm2025-08-13 ΔV=-14.27 Mm³ rms=51.9 mm2025-08-14 ΔV=-13.54 Mm³ rms=51.3 mm2025-08-15 ΔV=+2.41 Mm³ rms=9.5 mm2025-08-16 ΔV=+5.16 Mm³ rms=19.9 mm2025-08-17 ΔV=+4.79 Mm³ rms=21.2 mm2025-08-18 ΔV=+5.22 Mm³ rms=20.3 mm2025-08-19 ΔV=+17.37 Mm³ rms=117.0 mm2025-08-20 ΔV=+17.19 Mm³ rms=117.5 mm2025-08-21 ΔV=+17.79 Mm³ rms=118.3 mm2025-08-22 ΔV=+17.54 Mm³ rms=117.6 mm2025-08-23 ΔV=+17.89 Mm³ rms=118.0 mm2025-08-24 ΔV=+17.78 Mm³ rms=118.8 mm2025-08-25 ΔV=+17.33 Mm³ rms=117.5 mm2025-08-26 ΔV=+18.46 Mm³ rms=117.7 mm2025-08-27 ΔV=+18.79 Mm³ rms=118.4 mm2025-08-28 ΔV=+18.86 Mm³ rms=118.5 mm2025-08-29 ΔV=+18.36 Mm³ rms=118.7 mm2025-08-30 ΔV=+18.70 Mm³ rms=119.4 mm2025-08-31 ΔV=+18.58 Mm³ rms=118.6 mm2025-09-01 ΔV=+18.17 Mm³ rms=118.4 mm2025-09-02 ΔV=+18.73 Mm³ rms=119.5 mm2025-09-03 ΔV=+18.69 Mm³ rms=119.4 mm2025-09-04 ΔV=+18.51 Mm³ rms=120.0 mm2025-09-05 ΔV=+18.42 Mm³ rms=119.5 mm2025-09-06 ΔV=+18.18 Mm³ rms=118.6 mm2025-09-07 ΔV=+17.95 Mm³ rms=119.1 mm2025-09-08 ΔV=+18.07 Mm³ rms=120.1 mm2025-09-09 ΔV=+6.02 Mm³ rms=25.0 mm2025-09-10 ΔV=+18.60 Mm³ rms=117.9 mm2025-09-11 ΔV=+6.02 Mm³ rms=22.2 mm2025-09-12 ΔV=+18.16 Mm³ rms=118.9 mm2025-09-13 ΔV=+17.90 Mm³ rms=118.9 mm2025-09-14 ΔV=+18.16 Mm³ rms=119.1 mm2025-09-15 ΔV=+17.99 Mm³ rms=117.2 mm2025-09-16 ΔV=+18.17 Mm³ rms=118.9 mm2025-09-17 ΔV=+17.57 Mm³ rms=118.3 mm2025-09-18 ΔV=+5.75 Mm³ rms=20.9 mm2025-09-19 ΔV=+5.70 Mm³ rms=19.6 mm2025-09-20 ΔV=+5.50 Mm³ rms=21.2 mm2025-09-21 ΔV=+6.36 Mm³ rms=21.7 mm2025-09-22 ΔV=+6.52 Mm³ rms=21.1 mm2025-09-23 ΔV=+5.44 Mm³ rms=22.1 mm2025-09-24 ΔV=+6.10 Mm³ rms=23.6 mm2025-09-25 ΔV=+5.57 Mm³ rms=19.9 mm2025-09-26 ΔV=+5.39 Mm³ rms=21.6 mm2025-09-27 ΔV=+5.01 Mm³ rms=20.3 mm2025-09-28 ΔV=+5.64 Mm³ rms=19.7 mm2025-09-29 ΔV=+5.17 Mm³ rms=17.9 mm2025-09-30 ΔV=+5.35 Mm³ rms=20.1 mm2025-10-01 ΔV=+5.13 Mm³ rms=18.1 mm2025-10-02 ΔV=+4.61 Mm³ rms=18.7 mm2025-10-03 ΔV=+5.64 Mm³ rms=19.3 mm2025-10-04 ΔV=+4.88 Mm³ rms=19.0 mm2025-10-05 ΔV=+5.23 Mm³ rms=19.8 mm2025-10-06 ΔV=+4.49 Mm³ rms=18.6 mm2025-10-07 ΔV=+5.50 Mm³ rms=21.0 mm2025-10-08 ΔV=+5.80 Mm³ rms=17.9 mm2025-10-09 ΔV=+4.91 Mm³ rms=19.2 mm2025-10-10 ΔV=+4.80 Mm³ rms=18.5 mm2025-10-11 ΔV=+3.97 Mm³ rms=18.1 mm2025-10-12 ΔV=+4.81 Mm³ rms=18.5 mm2025-10-13 ΔV=+3.48 Mm³ rms=17.9 mm2025-10-14 ΔV=+4.10 Mm³ rms=17.4 mm2025-10-15 ΔV=+3.97 Mm³ rms=17.8 mm2025-10-16 ΔV=+3.97 Mm³ rms=17.2 mm2025-10-17 ΔV=+4.51 Mm³ rms=16.0 mm2025-10-18 ΔV=+4.15 Mm³ rms=17.2 mm2025-10-19 ΔV=+4.14 Mm³ rms=15.9 mm2025-10-20 ΔV=+3.93 Mm³ rms=15.5 mm2025-10-21 ΔV=+4.41 Mm³ rms=17.3 mm2025-10-22 ΔV=+3.67 Mm³ rms=16.4 mm2025-10-23 ΔV=+4.12 Mm³ rms=15.3 mm2025-10-24 ΔV=+3.31 Mm³ rms=13.7 mm2025-10-25 ΔV=+3.49 Mm³ rms=15.6 mm2025-10-26 ΔV=+3.34 Mm³ rms=14.1 mm2025-10-27 ΔV=+3.80 Mm³ rms=16.4 mm2025-10-28 ΔV=+4.98 Mm³ rms=21.8 mm2025-10-29 ΔV=+3.41 Mm³ rms=17.9 mm2025-10-30 ΔV=+3.67 Mm³ rms=15.1 mm2025-10-31 ΔV=+2.91 Mm³ rms=16.2 mm2025-11-01 ΔV=+4.21 Mm³ rms=14.0 mm2025-11-02 ΔV=+2.86 Mm³ rms=12.7 mm2025-11-03 ΔV=+3.03 Mm³ rms=12.3 mm2025-11-04 ΔV=+3.75 Mm³ rms=13.7 mm2025-11-05 ΔV=+3.15 Mm³ rms=11.4 mm2025-11-06 ΔV=+2.83 Mm³ rms=10.6 mm2025-11-07 ΔV=+2.31 Mm³ rms=12.3 mm2025-11-08 ΔV=+2.45 Mm³ rms=12.5 mm2025-11-09 ΔV=+2.87 Mm³ rms=12.3 mm2025-11-10 ΔV=+4.18 Mm³ rms=14.4 mm2025-11-11 ΔV=+2.35 Mm³ rms=15.2 mm2025-11-12 ΔV=+2.26 Mm³ rms=11.3 mm2025-11-13 ΔV=+2.01 Mm³ rms=10.3 mm2025-11-14 ΔV=+3.41 Mm³ rms=11.5 mm2025-11-15 ΔV=+2.77 Mm³ rms=12.1 mm2025-11-16 ΔV=+2.62 Mm³ rms=14.7 mm2025-11-17 ΔV=+2.44 Mm³ rms=13.1 mm2025-11-18 ΔV=+2.89 Mm³ rms=14.1 mm2025-11-19 ΔV=+2.72 Mm³ rms=15.2 mm2025-11-20 ΔV=+2.74 Mm³ rms=13.5 mm2025-11-21 ΔV=+2.63 Mm³ rms=12.3 mm2025-11-22 ΔV=+3.11 Mm³ rms=13.4 mm2025-11-23 ΔV=+3.34 Mm³ rms=14.5 mm2025-11-24 ΔV=+2.60 Mm³ rms=14.4 mm2025-11-25 ΔV=+2.38 Mm³ rms=14.1 mm2025-11-26 ΔV=+2.79 Mm³ rms=12.2 mm2025-11-27 ΔV=+2.26 Mm³ rms=18.9 mm2025-11-28 ΔV=+3.49 Mm³ rms=16.4 mm2025-11-29 ΔV=+3.00 Mm³ rms=14.7 mm2025-11-30 ΔV=+2.38 Mm³ rms=11.9 mm2025-12-01 ΔV=+2.19 Mm³ rms=13.1 mm2025-12-02 ΔV=+2.55 Mm³ rms=14.8 mm2025-12-03 ΔV=+2.93 Mm³ rms=15.0 mm2025-12-04 ΔV=+1.70 Mm³ rms=13.3 mm2025-12-05 ΔV=+2.61 Mm³ rms=15.1 mm2025-12-06 ΔV=+2.58 Mm³ rms=14.5 mm2025-12-07 ΔV=+3.00 Mm³ rms=14.0 mm2025-12-08 ΔV=+3.18 Mm³ rms=15.0 mm2025-12-09 ΔV=+2.75 Mm³ rms=14.1 mm2025-12-10 ΔV=+2.54 Mm³ rms=13.5 mm2025-12-11 ΔV=+3.80 Mm³ rms=15.4 mm2025-12-12 ΔV=+4.85 Mm³ rms=16.9 mm2025-12-13 ΔV=+3.28 Mm³ rms=15.0 mm2025-12-14 ΔV=+2.89 Mm³ rms=14.1 mm2025-12-15 ΔV=+3.32 Mm³ rms=12.7 mm2025-12-16 ΔV=+3.06 Mm³ rms=10.6 mm2025-12-17 ΔV=+4.33 Mm³ rms=12.3 mm2025-12-18 ΔV=+3.63 Mm³ rms=11.1 mm2025-12-19 ΔV=+3.52 Mm³ rms=11.0 mm2025-12-20 ΔV=+2.75 Mm³ rms=8.9 mm2025-12-21 ΔV=+2.99 Mm³ rms=9.7 mm2025-12-22 ΔV=+2.69 Mm³ rms=9.5 mm2025-12-23 ΔV=+2.66 Mm³ rms=8.6 mm2025-12-24 ΔV=+3.07 Mm³ rms=8.0 mm2025-12-25 ΔV=+2.65 Mm³ rms=8.4 mm2025-12-26 ΔV=+2.57 Mm³ rms=8.1 mm2025-12-27 ΔV=+1.39 Mm³ rms=6.2 mm2025-12-28 ΔV=+1.03 Mm³ rms=8.0 mm2025-12-29 ΔV=+1.68 Mm³ rms=8.3 mm2025-12-30 ΔV=+1.94 Mm³ rms=9.1 mm2025-12-31 ΔV=+1.60 Mm³ rms=9.3 mm2026-01-01 ΔV=+2.24 Mm³ rms=8.1 mm2026-01-02 ΔV=+2.81 Mm³ rms=8.9 mm2026-01-03 ΔV=+2.44 Mm³ rms=7.7 mm2026-01-04 ΔV=+2.31 Mm³ rms=7.8 mm2026-01-05 ΔV=+2.38 Mm³ rms=6.5 mm2026-01-06 ΔV=+2.55 Mm³ rms=9.1 mm2026-01-07 ΔV=+2.51 Mm³ rms=7.2 mm2026-01-08 ΔV=+2.23 Mm³ rms=8.4 mm2026-01-09 ΔV=+2.26 Mm³ rms=8.8 mm2026-01-10 ΔV=+1.39 Mm³ rms=8.1 mm2026-01-11 ΔV=+2.08 Mm³ rms=10.6 mm2026-01-12 ΔV=+2.68 Mm³ rms=8.9 mm2026-01-13 ΔV=+2.25 Mm³ rms=7.9 mm2026-01-14 ΔV=+2.50 Mm³ rms=9.2 mm2026-01-15 ΔV=+2.38 Mm³ rms=8.8 mm2026-01-16 ΔV=+1.22 Mm³ rms=7.5 mm2026-01-17 ΔV=+1.83 Mm³ rms=8.4 mm2026-01-18 ΔV=+2.58 Mm³ rms=8.9 mm2026-01-19 ΔV=+2.79 Mm³ rms=8.9 mm2026-01-20 ΔV=+2.62 Mm³ rms=9.2 mm2026-01-21 ΔV=+3.07 Mm³ rms=9.6 mm2026-01-22 ΔV=+2.64 Mm³ rms=8.1 mm2026-01-23 ΔV=+2.65 Mm³ rms=9.3 mm2026-01-24 ΔV=+2.63 Mm³ rms=7.9 mm2026-01-25 ΔV=+2.50 Mm³ rms=9.0 mm2026-01-26 ΔV=+2.84 Mm³ rms=9.1 mm2026-01-27 ΔV=+3.32 Mm³ rms=9.0 mm2026-01-28 ΔV=+3.06 Mm³ rms=8.3 mm2026-01-29 ΔV=+3.13 Mm³ rms=8.3 mm2026-01-30 ΔV=+2.60 Mm³ rms=7.9 mm2026-01-31 ΔV=+2.41 Mm³ rms=7.4 mm2026-02-01 ΔV=+2.04 Mm³ rms=7.7 mm2026-02-02 ΔV=+2.11 Mm³ rms=7.8 mm2026-02-03 ΔV=+1.83 Mm³ rms=8.1 mm2026-02-04 ΔV=+2.27 Mm³ rms=7.5 mm2026-02-05 ΔV=+1.54 Mm³ rms=7.1 mm2026-02-06 ΔV=+1.52 Mm³ rms=8.1 mm2026-02-07 ΔV=+1.82 Mm³ rms=7.0 mm2026-02-08 ΔV=+1.38 Mm³ rms=6.3 mm2026-02-09 ΔV=+1.66 Mm³ rms=6.5 mm2026-02-10 ΔV=+1.03 Mm³ rms=5.0 mm2026-02-11 ΔV=+1.00 Mm³ rms=6.4 mm2026-02-12 ΔV=+1.21 Mm³ rms=6.3 mm2026-02-13 ΔV=+0.68 Mm³ rms=5.7 mm2026-02-14 ΔV=+1.00 Mm³ rms=5.8 mm2026-02-15 ΔV=+1.35 Mm³ rms=7.0 mm2026-02-16 ΔV=+2.21 Mm³ rms=7.2 mm2026-02-17 ΔV=+1.63 Mm³ rms=7.2 mm2026-02-18 ΔV=+1.69 Mm³ rms=6.7 mm2026-02-19 ΔV=+1.49 Mm³ rms=6.3 mm2026-02-20 ΔV=+1.32 Mm³ rms=6.1 mm2026-02-21 ΔV=+1.81 Mm³ rms=5.5 mm2026-02-22 ΔV=+1.53 Mm³ rms=7.5 mm2026-02-23 ΔV=+1.57 Mm³ rms=8.0 mm2026-02-24 ΔV=+1.59 Mm³ rms=7.1 mm2026-02-25 ΔV=+1.74 Mm³ rms=8.9 mm2026-02-26 ΔV=+1.58 Mm³ rms=7.4 mm2026-02-27 ΔV=+1.18 Mm³ rms=5.7 mm2026-02-28 ΔV=+1.18 Mm³ rms=5.8 mm2026-03-01 ΔV=+2.31 Mm³ rms=8.9 mm2026-03-02 ΔV=+1.59 Mm³ rms=6.3 mm2026-03-03 ΔV=+1.42 Mm³ rms=6.9 mm2026-03-04 ΔV=+1.88 Mm³ rms=7.6 mm2026-03-05 ΔV=+2.29 Mm³ rms=6.7 mm2026-03-06 ΔV=+2.62 Mm³ rms=9.6 mm2026-03-07 ΔV=+2.04 Mm³ rms=7.5 mm2026-03-08 ΔV=+1.18 Mm³ rms=6.6 mm2026-03-09 ΔV=+2.18 Mm³ rms=7.1 mm2026-03-10 ΔV=+1.83 Mm³ rms=6.9 mm2026-03-11 ΔV=+2.46 Mm³ rms=8.0 mm2026-03-12 ΔV=+2.44 Mm³ rms=8.4 mm2026-03-13 ΔV=+1.87 Mm³ rms=8.0 mm2026-03-14 ΔV=+2.28 Mm³ rms=10.4 mm2026-03-15 ΔV=+2.29 Mm³ rms=8.5 mm2026-03-16 ΔV=+2.22 Mm³ rms=8.8 mm2026-03-17 ΔV=+2.41 Mm³ rms=9.5 mm2026-03-18 ΔV=+1.95 Mm³ rms=7.8 mm2026-03-19 ΔV=+2.22 Mm³ rms=8.5 mm2026-03-20 ΔV=+1.62 Mm³ rms=7.7 mm2026-03-21 ΔV=+1.86 Mm³ rms=8.2 mm2026-03-22 ΔV=+2.03 Mm³ rms=8.5 mm2026-03-23 ΔV=+2.14 Mm³ rms=9.0 mm2026-03-24 ΔV=+2.30 Mm³ rms=7.8 mm2026-03-25 ΔV=+2.14 Mm³ rms=5.4 mm2026-03-26 ΔV=+3.04 Mm³ rms=9.5 mm2026-03-27 ΔV=+2.12 Mm³ rms=7.0 mm2026-03-28 ΔV=+1.90 Mm³ rms=6.9 mm2026-03-29 ΔV=+2.46 Mm³ rms=7.8 mm2026-03-30 ΔV=+1.71 Mm³ rms=9.7 mm2026-03-31 ΔV=+1.06 Mm³ rms=7.0 mm2026-04-01 ΔV=+1.80 Mm³ rms=8.2 mm2026-04-02 ΔV=+3.03 Mm³ rms=12.3 mm2026-04-03 ΔV=+1.74 Mm³ rms=8.4 mm2026-04-04 ΔV=+1.42 Mm³ rms=6.4 mm2026-04-05 ΔV=+0.70 Mm³ rms=4.9 mm2026-04-06 ΔV=+1.62 Mm³ rms=6.7 mm2026-04-07 ΔV=+2.05 Mm³ rms=6.5 mm2026-04-08 ΔV=+1.01 Mm³ rms=7.2 mm2026-04-09 ΔV=+1.69 Mm³ rms=7.7 mm2026-04-10 ΔV=+0.66 Mm³ rms=5.8 mm2026-04-11 ΔV=+1.11 Mm³ rms=6.1 mm2026-04-12 ΔV=+1.67 Mm³ rms=6.5 mm2026-04-13 ΔV=+0.38 Mm³ rms=6.1 mm2026-04-14 ΔV=+0.71 Mm³ rms=5.7 mm2026-04-15 ΔV=+0.98 Mm³ rms=5.9 mm2026-04-16 ΔV=+0.51 Mm³ rms=5.2 mm2026-04-17 ΔV=+1.39 Mm³ rms=6.1 mm2026-04-18 ΔV=+1.75 Mm³ rms=6.7 mm2026-04-19 ΔV=+0.90 Mm³ rms=6.4 mm2026-04-20 ΔV=+1.28 Mm³ rms=5.1 mm2026-04-21 ΔV=+0.48 Mm³ rms=8.0 mm2026-04-22 ΔV=+0.48 Mm³ rms=8.7 mm2026-04-23 ΔV=+0.70 Mm³ rms=6.0 mm2026-04-24 ΔV=+1.51 Mm³ rms=7.1 mm2026-04-25 ΔV=+0.50 Mm³ rms=6.0 mm2026-04-26 ΔV=+0.96 Mm³ rms=7.0 mm2026-04-27 ΔV=+1.71 Mm³ rms=8.4 mm2026-04-28 ΔV=+0.81 Mm³ rms=6.1 mm2026-04-29 ΔV=+1.97 Mm³ rms=7.0 mm2026-04-30 ΔV=+1.49 Mm³ rms=7.3 mm2026-05-01 ΔV=+1.67 Mm³ rms=7.1 mm2026-05-02 ΔV=+0.16 Mm³ rms=10.9 mm2026-05-03 ΔV=+1.47 Mm³ rms=5.9 mm2026-05-04 ΔV=+1.63 Mm³ rms=5.6 mm2026-05-05 ΔV=+1.10 Mm³ rms=6.3 mm2026-05-06 ΔV=+1.85 Mm³ rms=5.8 mm2026-05-07 ΔV=+1.43 Mm³ rms=5.9 mm2026-05-08 ΔV=+1.33 Mm³ rms=4.4 mm2026-05-09 ΔV=+0.94 Mm³ rms=4.6 mm2026-05-10 ΔV=+1.50 Mm³ rms=4.4 mm2026-05-11 ΔV=+1.28 Mm³ rms=5.0 mm2026-05-12 ΔV=+1.27 Mm³ rms=5.3 mm2026-05-13 ΔV=+1.48 Mm³ rms=4.9 mm2026-05-14 ΔV=+1.77 Mm³ rms=5.8 mm2026-05-15 ΔV=+1.61 Mm³ rms=4.5 mm2026-05-16 ΔV=+1.70 Mm³ rms=4.6 mm2026-05-17 ΔV=+0.97 Mm³ rms=4.1 mm2026-05-18 ΔV=+0.66 Mm³ rms=4.6 mm2026-05-19 ΔV=+1.88 Mm³ rms=7.2 mm2026-05-20 ΔV=+1.15 Mm³ rms=4.8 mm2026-05-21 ΔV=+1.46 Mm³ rms=5.5 mm2026-05-22 ΔV=+1.52 Mm³ rms=5.6 mm2026-05-23 ΔV=+1.70 Mm³ rms=5.6 mm2026-05-24 ΔV=+0.89 Mm³ rms=3.3 mm2026-05-25 ΔV=+1.22 Mm³ rms=6.3 mm2026-05-26 ΔV=+1.02 Mm³ rms=4.0 mm2026-05-27 ΔV=+0.19 Mm³ rms=2.2 mm2026-05-28 ΔV=+0.73 Mm³ rms=3.4 mm01.08.2530.09.2529.11.2528.01.2629.03.2628.05.26
Lava flux of Sundhnúkur eruptions (9 events, Dec 2023 - Aug 2025) — total 267 Mm³ of lava (≈ 0.27 km³). Each bar = one eruption, width = duration, height = total volume (Mm³), colour = peak flux. Largest (G6): peak ~2000 m³/s — the largest lava flux on Iceland since Skaftáreldar 1783.
0 Mm³30 Mm³61 Mm³G1G1: 2023-12-18 til 2023-12-21, 12.0 Mm³, topp ~300 m³/sG2G2: 2024-01-14 til 2024-01-16, 2.0 Mm³, topp ~200 m³/sG3G3: 2024-02-08 til 2024-02-10, 13.0 Mm³, topp ~600 m³/sG4G4: 2024-03-16 til 2024-05-09, 35.0 Mm³, topp ~1200 m³/sG5G5: 2024-05-29 til 2024-06-22, 45.0 Mm³, topp ~1500 m³/sG6G6: 2024-08-22 til 2024-09-06, 61.0 Mm³, topp ~2000 m³/sG7G7: 2024-11-20 til 2024-12-08, 49.0 Mm³, topp ~1300 m³/sG8G8: 2025-04-01 til 2025-04-01, 0.4 Mm³, topp ~100 m³/sG9G9: 2025-07-16 til 2025-08-05, 50.0 Mm³, topp ~800 m³/s12.2307.2401.2508.2502.2609.26< 400 m³/s400-800800-1500> 1500

Up = land rising (possible magma accumulation), down = subsidence. From Nevada Geodetic Lab (third-party processing, ~3-week lag, latest 2026-08-29). Interpreted deformation: Icelandic Met Office.

🌊 Volcanic tremor — The baseline tremor is currently elevated but its variations are well explained by strong…
Tremor (RSAM)
IMO tremor plot (station grv). Most of the signal is weather and surf — not eruption confirmation. All stations: vedur.is ↗.
Weather now: wind 2 m/s (Grindavík), waves 3.3 m — notable — likely weather.
The baseline tremor is currently elevated but its variations are well explained by strong local weather and ocean waves. (AI)
Band analysis past 9 days (from digitized RSAM values). High 2-4 Hz + low 0.5-1 Hz = possible magma-movement signal; high 0.5-1 Hz without 2-4 Hz = weather/surf.
0,5-1 Hz2413-7761 (~3804)1-2 Hz1500-7478 (~3152)2-4 Hz739-7196 (~1935)01.0903.0905.0906.0908.0910.0911.09dark = low · orange = medium · red = high (per-band relative)

Earthquakes in the system

Time (UTC)MagDepth (km)Area
2026-09-11 18:08M-0.90.0Reykjanesskagi Grindavík
2026-09-11 17:58M0.33.2Reykjanesskagi Grindavík
2026-09-11 06:39M0.14.6Reykjanesskagi Grindavík
2026-09-11 05:16M-0.24.4Reykjanesskagi Grindavík
2026-09-11 03:48M-0.05.0Reykjanesskagi Grindavík
2026-09-11 00:25M0.36.4Reykjanesskagi
2026-09-09 04:43M-0.30.0Reykjanesskagi Grindavík
2026-09-09 03:32M-0.50.0Reykjanesskagi
2026-09-08 18:44M-0.05.3Reykjanesskagi Grindavík
2026-09-08 15:08M-0.02.8Reykjanesskagi Grindavík
2026-09-08 07:51M-0.64.4Reykjanesskagi Grindavík
2026-09-08 07:48M-0.94.1Reykjanesskagi Grindavík
2026-09-07 11:46M1.26.1Reykjanesskagi
2026-09-07 10:49M0.94.9Reykjanesskagi
2026-09-07 10:33M-0.24.2Reykjanesskagi
2026-09-07 10:31M1.55.4Reykjanesskagi
2026-09-07 10:29M-0.33.5Reykjanesskagi
2026-09-06 13:44M0.15.4Reykjanesskagi Grindavík
2026-09-06 09:06M0.35.7Reykjanesskagi Grindavík
2026-09-06 08:36M0.25.6Reykjanesskagi Grindavík
2026-09-06 07:49M0.26.0Reykjanesskagi Grindavík
2026-09-06 00:24M-0.910.0Reykjanesskagi Grindavík
2026-09-05 21:01M-1.23.4Reykjanesskagi Grindavík
2026-09-05 17:54M-0.127.4Reykjanesskagi Grindavík
2026-09-05 12:23M-0.74.1Reykjanesskagi Grindavík
2026-09-05 08:28M-0.43.8Reykjanesskagi
2026-09-05 05:40M-1.10.0Reykjanesskagi Grindavík
2026-09-05 05:20M0.34.7Reykjanesskagi Grindavík
2026-09-05 04:02M-1.20.0Reykjanesskagi Grindavík
2026-09-05 02:39M-0.35.0Reykjanesskagi Grindavík
2026-09-05 01:32M-0.56.5Reykjanesskagi Grindavík
2026-09-04 13:19M0.24.1Reykjanesskagi Grindavík
2026-09-04 02:44M-0.65.0Reykjanesskagi Grindavík
2026-09-03 23:08M1.02.2Reykjanesskagi Grindavík
2026-09-03 03:47M0.14.4Reykjanesskagi Grindavík
2026-09-02 06:07M-0.73.5Reykjanesskagi Grindavík
2026-09-02 06:07M0.34.8Reykjanesskagi Grindavík
2026-09-02 06:06M0.24.2Reykjanesskagi Grindavík
2026-09-02 00:08M0.53.6Reykjanesskagi Grindavík
2026-09-01 20:28M-0.43.0Reykjanesskagi Grindavík
2026-09-01 10:39M-0.80.0Reykjanesskagi Grindavík
2026-08-31 21:59M-0.25.5Reykjanesskagi Grindavík
2026-08-31 21:35M-1.22.5Reykjanesskagi Grindavík
2026-08-31 21:29M-0.92.7Reykjanesskagi Grindavík
2026-08-31 20:10M-0.84.7Reykjanesskagi Grindavík
2026-08-31 18:21M-1.23.0Reykjanesskagi Grindavík
2026-08-30 23:39M-0.44.4Reykjanesskagi Grindavík
2026-08-30 22:44M-0.54.6Reykjanesskagi Grindavík
2026-08-30 01:41M-0.05.0Reykjanesskagi Grindavík
2026-08-30 00:15M-1.15.0Reykjanesskagi Grindavík
2026-08-29 22:14M-0.72.1Reykjanesskagi Grindavík
2026-08-29 20:19M-0.812.3Reykjanesskagi Grindavík
2026-08-29 20:11M-0.03.3Reykjanesskagi Grindavík
2026-08-29 14:54M-0.73.6Reykjanesskagi Grindavík
2026-08-29 02:02M-1.03.9Reykjanesskagi Grindavík
2026-08-28 17:26M-0.20.2Reykjanesskagi Grindavík
2026-08-28 11:46M0.25.4Reykjanesskagi Grindavík
2026-08-28 10:52M-0.27.5Reykjanesskagi Grindavík
2026-08-28 07:34M-0.20.4Reykjanesskagi
2026-08-28 03:30M-1.06.2Reykjanesskagi Grindavík
For the advanced — expert charts — Coulomb, migration, InSAR
🔬 Coulomb stress transfer — advanced analysis
6 earthquakes M≥3.0 in this window on this system. Such events transfer stress to neighbouring faults — some become more likely to slip, others less ("Coulomb stress transfer"). The Met Office does not publish focal mechanisms for automatically located events, so Skjálfti does not compute this itself — it requires strike/dip/rake data which is only available for M≥4.5 events in the GCMT catalogue.

For Coulomb analysis, see: USGS Coulomb 3.4 (stand-alone software) and focal mechanisms for Iceland in Global CMT.
📡 InSAR — radar deformation across the area
InSAR is satellite radar from Sentinel-1: it measures deformation across the whole area, not just points like GNSS stations. Six-day interferograms reveal where the ground rose or subsided between passes. InSAR distinguishes vertical deformation (magma chamber inflation) from horizontal (dike intrusion) — GNSS alone cannot.

View latest interferograms and time-series at COMET LiCS portal (Sentinel-1, ~4-6 day lag).

System journal

Automatic snapshots and media coverage, in chronological order. Subscribe: RSS · ntfy skjalftar-reykjanes-svartsengi
2026-09-11 18:00:03 UTC
In the last 24 hours, 5 earthquakes were measured in the Reykjanes system at Svartsengi, which is a fissure system at the tip of the Reykjanes Peninsula. The activity is similar to the past week but within what is normal for this area. The largest earthquake in the last 48 hours was M0.3, and the cumulative moment of earthquakes over the same period was Mw 0.6. GNSS uplift shows rapid, step-like deformations associated with eruption cycles. Results are automatic preliminary results.
2026-09-11 09:10:02 UTC
In the last 24 hours, 4 earthquakes were measured in the Reykjanes/Svartsengi fissure system, which is similar activity to the past week. The largest earthquake was M0.3. Seismic activity is within what is normal for this area, but the cumulative moment of earthquakes over the last 48 hours was Mw 0.4. GNSS measurements show rapid, step-like deformations associated with eruption cycles. Diffuse background activity is more prevalent than swarms, and the activity most resembles the period around July 21, 2021. These are automatic preliminary results.
2026-09-11 05:20:02 UTC
In the last 24 hours, 3 earthquakes were measured at Reykjanes/Svartsengi, which is a fissure system at the tip of the Reykjanes Peninsula. The activity is similar to the past week and within what is normal for this area. The largest earthquake in the last 48 hours was M0.1, and the cumulative moment of the earthquakes was Mw 0.2. The seismic activity in the last 7 days was characterized more by diffuse background activity than swarms. These results are automatic preliminary results.
2026-09-11 00:30:02 UTC
In the last 24 hours, one earthquake was measured in the Reykjanes system near Svartsengi. Activity has been decreasing, with a weekly average of four earthquakes per day and a monthly average of four earthquakes per day. The largest earthquake in the last 48 hours was M0.1, and the cumulative magnitude of earthquakes in the last 48 hours was Mw 0.2. Earthquake activity is within what is normal for this fissure system on the Reykjanes Peninsula, which has erupted repeatedly since December 2023. The earthquakes are mostly scattered background activity rather than swarms, and the activity most resembles the period around July 20, 2021. Results are automatic preliminary results.
2026-09-10 18:45:02 UTC
In the last 24 hours, no seismic activity was detected in the Reykjanes/Svartsengi fissure system. In the last 48 hours, 2 earthquakes were measured, the largest of which was M-0.3. Activity is decreasing but is within what is normal for this area, and most closely resembles the period around August 26, 2021. The cumulative magnitude of earthquakes in the last 48 hours was Mw -0.2, and the activity is characterized by diffuse background seismicity rather than swarms. These are automatic preliminary results. Further reports on land uplift and development can be found lower on the page.
2026-09-10 04:45:02 UTC
In the last 24 hours, no earthquakes were measured in the Reykjanes system at Svartsengi. In the last 48 hours, 6 earthquakes were measured, and 28 in the last 7 days. Activity is decreasing, with the last 24 hours being below the weekly average. The largest earthquake in the last 48 hours measured M-0.0, and the cumulative moment magnitude was Mw 0.3. Earthquake activity is within what is normal for this rift system, which has erupted repeatedly since December 2023. Diffuse background activity is more prevalent than swarms. Results are automatic preliminary results.
2026-09-09 18:45:01 UTC
In the last 24 hours, 2 earthquakes were measured in the Reykjanes system at Svartsengi, which is below the weekly average of 4 earthquakes per day and the monthly average of 5 earthquakes per day, indicating that activity is decreasing. The largest earthquake in the last 48 hours was M-0.0. Seismic activity is within what is normal for this area, and it is mostly diffuse background activity rather than swarms. Results are automatic preliminary results.
2026-09-09 12:35:03 UTC
In the last 24 hours, 4 earthquakes were measured in the Reykjanes/Svartsengi system, which is a fissure system at the tip of the Reykjanes Peninsula. Activity is similar to the past week, but the monthly average is 5 earthquakes per day. The largest earthquake in the last 48 hours was M-0.0, and the cumulative moment of earthquakes during the same period was Mw 0.3. Seismic activity is within what is normal for this area and consists of diffuse background activity rather than swarms. Results are automatic preliminary results.
2026-09-09 10:35:02 UTC
In the last 24 hours, 4 earthquakes were measured in the Reykjanes system at Svartsengi, which is similar activity to the past week. The largest earthquake in the last 48 hours was M1.2. Seismic activity is within what is normal for this fissure system, which has erupted repeatedly since December 2023. The cumulative moment of earthquakes in the last 48 hours was Mw 1.3, and the activity is mostly diffuse background activity rather than swarms. These results are automatic preliminary results.
2026-09-09 08:00:03 UTC
In the last 24 hours, 4 earthquakes were measured in the Reykjanes/Svartsengi system, which is a fissure system at the tip of the Reykjanes Peninsula. The activity is similar to that of the past week, with a weekly average of 4 earthquakes per day and a monthly average of 5 earthquakes per day. The largest earthquake in the last 48 hours was M1.5, and the cumulative moment magnitude for the same period was Mw 1.6. Seismic activity is within what is normal for this area, characterized more by diffuse background activity than swarms. These results are automatic preliminary results.
2026-09-09 06:00:03 UTC
In the last 24 hours, 6 earthquakes were measured in the Reykjanes/Svartsengi fissure system, which is similar activity to the past week. The largest earthquake in the last 48 hours was M1.5 with a cumulative magnitude of Mw 1.6. Seismic activity is within what is normal for this area, but it is characterized more by diffuse background activity than by swarms. Results are automatic preliminary results.
2026-09-09 04:00:02 UTC
In the last 24 hours, 5 earthquakes were measured in the Reykjanes system at Svartsengi, which is similar activity to the past week. The largest earthquake in the last 48 hours was M1.5, and the cumulative moment magnitude for the same period was Mw 1.6. Seismic activity is within what is normal for this fissure system, which has erupted repeatedly since December 2023. GNSS measurements show rapid, step-like deformations associated with eruption cycles, and the activity is most similar to the period around June 18, 2023. Results are automatic preliminary results.
2026-09-09 00:40:03 UTC
In the last 24 hours, 4 earthquakes were measured in the Reykjanes/Svartsengi fissure system, which is similar activity to the past week. The largest earthquake in the last 48 hours was M1.5. Seismic activity is within what is normal for this area and is characterized by diffuse background activity rather than swarms. GNSS measurements show rapid, step-like deformations related to eruption cycles. These automatic preliminary results most closely resemble activity measured around October 6, 2021.
2026-09-08 22:00:03 UTC
In the last 24 hours, 4 earthquakes were measured in the Reykjanes/Svartsengi fissure system, which has erupted repeatedly since December 2023. Activity is similar to the past week and is within what is normal for this area, with diffuse background activity rather than swarms. The largest earthquake in the last 48 hours was M1.5, and the cumulative moment magnitude was Mw 1.6. GNSS uplift shows small, step-like deformations associated with eruption cycles. These are automatic preliminary results and the activity most closely resembles the period around March 22, 2023. Further reports on trends and uplift can be found lower on the page.
2026-09-08 15:10:03 UTC
In the last 24 hours, 3 earthquakes were measured in the Reykjanes/Svartsengi system, which is a fissure system at the tip of the Reykjanes Peninsula. The activity is similar to that of the past week, with a weekly average of 4 earthquakes per day and a monthly average of 5 earthquakes per day. The largest earthquake in the last 48 hours was M1.5, and the cumulative moment magnitude for the same period was Mw 1.6. Seismic activity is within what is normal for this area, with a 2-year daily average of 3.8 earthquakes per day. Diffuse background activity is more prevalent than swarms, with 58% of events in the last 7 days being independent (background) events. GNSS-uplift shows rapid, step-like deformations associated with eruption cycles. These results are automatic preliminary results. Further reports on development and uplift can be found lower on the page.
2026-09-08 12:35:02 UTC
In the last 24 hours, 2 earthquakes were measured in the Reykjanes/Svartsengi fissure system, located at the tip of the Reykjanes Peninsula, which has erupted repeatedly since December 2023. Activity is decreasing but is within what is normal for this area. The largest earthquake in the last 48 hours was M1.5, and the cumulative moment magnitude for the same period was Mw 1.6. The activity most closely resembles the period around June 18, 2023. Further information on ground deformation and development can be found lower on the page.
2026-09-08 10:35:01 UTC
In the last 24 hours, 4 earthquakes were measured in the Reykjanes system at Svartsengi, which is similar activity to the past week. This fissure system on the Reykjanes Peninsula has erupted repeatedly since December 2023. Seismic activity is within what is normal for this area and is characterized by diffuse background activity rather than swarms. The largest earthquake in the last 48 hours was M1.5, and the cumulative moment of earthquakes during the same period was Mw 1.6. Results are automatic preliminary results.
2026-09-08 07:55:02 UTC
In the last 24 hours, 7 earthquakes were measured in Reykjanes/Svartsengi, a fissure system at the tip of the Reykjanes Peninsula. The activity is similar to the past week, and it is within what is normal for this area (2-year daily average of 3.8 earthquakes per day). The largest earthquake in the last 48 hours was M1.5, and the cumulative magnitude of seismic activity during the same period was Mw 1.6. GNSS measurements show minor, step-like deformation associated with eruption cycles. In the last 7 days, the activity was mostly diffuse background activity (58% independent events) rather than swarms. This activity most resembles the period around June 18, 2023. These are automatic preliminary results. Further reports on development and ground deformation can be found lower on the page.
2026-09-07 17:40:02 UTC
Over the last 24 hours, 5 earthquakes were detected in the volcanic system on the outer Reykjanes peninsula, where repeated basaltic fissure eruptions and magma intrusions have occurred near Grindavík since December 2023. The seismic activity is similar to the past week and is within what is considered normal for this area, consisting mostly of scattered background activity rather than swarms. The largest earthquake in the last 48 hours was magnitude 1.5, with a cumulative seismic moment of 1.7 Mw during that period, while ground deformation shows rapid, step-like inflation associated with eruptive cycles. These results are automatic preliminary findings with unreliable depths, but measurements show a significant horizontal drift of earthquake epicenters to the southwest at 1.92 kilometers per day over the last seven days. The current activity most closely resembles the period around June 18, 2023, and further maps and trend charts can be found below.
2026-09-07 14:10:02 UTC
Over the last 24 hours, 5 earthquakes were detected on the Reykjanes peninsula, indicating that activity in this fissure system remains similar to the past week and is within the normal range for this area. The largest earthquake in the last 48 hours was magnitude 1.5 (M1.5), with a cumulative seismic moment of 1.7 (Mw) during that period, and the activity is currently characterized by diffuse background seismicity rather than short-lived swarms. Measurements also show a significant horizontal migration of earthquake epicenters to the southwest at a rate of 1.92 kilometers per day and rapid, step-like ground deformation at Svartsengi, though these are automatic preliminary results with unreliable depths. This activity most closely resembles the period around June 18, 2023, and further maps and deformation plots can be found below.
What do the numbers mean — and what should I do?

β (swarm signal): how high activity is versus the area's 2-year average. β above 2 means an ongoing swarm. It measures activity, not a forecast of a large quake.

Cumulative moment (Mw): the combined energy of the quakes in the period. Uplift (GNSS): whether the ground is rising or sinking, mm per year — the data are a few weeks old. Some systems (e.g. Svartsengi) deform in steps during eruption cycles rather than at a steady annual rate.

Swarm character is computed for a whole volcanic belt, not a single system — it describes the belt, not necessarily this one system.

What should I do? This is automatic monitoring for information — not an official warning. Follow official information from the Icelandic Met Office and Civil Protection (112).