Northern Volcanic Zone
Zone — systems within: Askja · Kverkfjöll · Herðubreið · Krafla · Fremrinámur · Þeistareykir
Points = earthquake locations in the selected window, coloured by magnitude: M3+ · M2+ · smaller (a sample if more than 800).
Earthquakes
15
Largest
M1.5
M3,0+
0
Depth range
0–25 km
Earthquakes over time
Cumulative count · 15 earthquakes · total moment ≈ M1.7 · count moment
Depth (0 km at top). Grey: fixed depth.
Magnitude distribution
Depth cross-sections — color by age (orange=newest, grey=older), point size by M. Rising cluster = possible magma intrusion.
Earthquakes
19
Largest
M1.5
M3,0+
0
Depth range
0–25 km
Earthquakes over time
Cumulative count · 19 earthquakes · total moment ≈ M1.7 · count moment
Depth (0 km at top). Grey: fixed depth.
Magnitude distribution
Depth cross-sections — color by age (orange=newest, grey=older), point size by M. Rising cluster = possible magma intrusion.
Earthquakes
81
Largest
M1.7
M3,0+
0
Depth range
0–25 km
Earthquakes over time
Cumulative count · 81 earthquakes · total moment ≈ M2.1 · count moment
No significant hypocenter migration — activity is stationary (R²=0.04, n=81); no sign of a propagating dike. Migration shows automatically if R²≥0.30.
Depth (0 km at top). Grey: fixed depth.
Magnitude distribution
Depth cross-sections — color by age (orange=newest, grey=older), point size by M. Rising cluster = possible magma intrusion.
Earthquakes
243
Largest
M2.1
M3,0+
0
Depth range
0–25 km
Earthquakes over time
Cumulative count · 243 earthquakes · total moment ≈ M2.5 · count moment
Depth (0 km at top). Grey: fixed depth.
Magnitude distribution
Depth cross-sections — color by age (orange=newest, grey=older), point size by M. Rising cluster = possible magma intrusion.
Earthquakes
557
Largest
M2.1
M3,0+
0
Depth range
0–27 km
Earthquakes over time
Cumulative count · 557 earthquakes · total moment ≈ M2.6 · count moment
Depth (0 km at top). Grey: fixed depth.
Magnitude distribution
Depth cross-sections — color by age (orange=newest, grey=older), point size by M. Rising cluster = possible magma intrusion.
Earthquakes
1387
Largest
M2.3
M3,0+
0
Depth range
0–30 km
Earthquakes over time
Cumulative count · 1387 earthquakes · total moment ≈ M2.9 · count moment
Depth (0 km at top). Grey: fixed depth.
Magnitude distribution
Depth cross-sections — color by age (orange=newest, grey=older), point size by M. Rising cluster = possible magma intrusion.
Earthquakes
2315
Largest
M2.3
M3,0+
0
Depth range
0–30 km
Earthquakes over time
Cumulative count · 2315 earthquakes · total moment ≈ M3.0 · count moment
Depth (0 km at top). Grey: fixed depth.
Magnitude distribution
Depth cross-sections — color by age (orange=newest, grey=older), point size by M. Rising cluster = possible magma intrusion.
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
4679
Largest
M3.2
M3,0+
1
Depth range
0–30 km
Earthquakes over time
Cumulative count · 4679 earthquakes · total moment ≈ M3.4 · count moment
Depth (0 km at top). Grey: fixed depth.
Magnitude distribution
Depth cross-sections — color by age (orange=newest, grey=older), point size by M. Rising cluster = possible magma intrusion.
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
21.938
Largest
M4.1
M3.0+
14
Days with data
1.794
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
Cumulative count and moment
Total moment of all events in the window equals a single Mw 4.4
Magnitude distribution
<116125
1–22537
2–3232
3–413
≥41
Gutenberg-Richter b ≈ 1.10 ± 0.05 (i.e. likely 1.05–1.14, M≥1.7, n=524)
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
43.079
Largest
M4.1
M3.0+
26
Days with data
3.595
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
Cumulative count and moment
Total moment of all events in the window equals a single Mw 4.5
Magnitude distribution
<134113
1–25422
2–3485
3–425
≥41
Gutenberg-Richter b ≈ 1.11 ± 0.03 (i.e. likely 1.08–1.14, M≥1.7, n=1050)
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
77.795
Largest
M4.5
M3.0+
83
Days with data
7.006
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
Cumulative count and moment
Total moment of all events in the window equals a single Mw 5.0
Magnitude distribution
<154720
1–217036
2–32878
3–480
≥43
Gutenberg-Richter b ≈ 1.21 ± 0.01 (i.e. likely 1.20–1.22, M≥1.7, n=6128)
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
81.630
Largest
M5.0
M3.0+
136
Days with data
8.378
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
Cumulative count and moment
Total moment of all events in the window equals a single Mw 5.2
Magnitude distribution
<155736
1–219074
2–33599
3–4130
≥46
Gutenberg-Richter b ≈ 1.16 ± 0.01 (i.e. likely 1.15–1.18, M≥1.7, n=7509)
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.