Western Volcanic Zone
Zone — systems within: Grímsnes · Prestahnúkur · Hveravellir
Points = earthquake locations in the selected window, coloured by magnitude: M3+ · M2+ · smaller (a sample if more than 800).
Earthquakes
12
Largest
M2.9
M3,0+
0
Depth range
4–16 km
Earthquakes over time
Cumulative count · 12 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
14
Largest
M2.9
M3,0+
0
Depth range
4–16 km
Earthquakes over time
Cumulative count · 14 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
27
Largest
M2.9
M3,0+
0
Depth range
0–16 km
Earthquakes over time
Cumulative count · 27 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.
Earthquakes
69
Largest
M2.9
M3,0+
0
Depth range
0–17 km
Earthquakes over time
Cumulative count · 69 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.
Earthquakes
654
Largest
M3.3
M3,0+
2
Depth range
0–23 km
Earthquakes over time
Cumulative count · 654 earthquakes · total moment ≈ M3.6 · 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.
Gutenberg-Richter b ≈ 1.28 ± 0.15 (i.e. likely 1.13–1.43, M≥1.7, n=72)
Earthquakes
1650
Largest
M3.9
M3,0+
4
Depth range
0–28 km
Earthquakes over time
Cumulative count · 1650 earthquakes · total moment ≈ M4.1 · 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.
Gutenberg-Richter b ≈ 1.33 ± 0.12 (i.e. likely 1.21–1.46, M≥1.7, n=153)
Earthquakes
1833
Largest
M3.9
M3,0+
4
Depth range
0–28 km
Earthquakes over time
Cumulative count · 1833 earthquakes · total moment ≈ M4.1 · 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.
Gutenberg-Richter b ≈ 1.36 ± 0.12 (i.e. likely 1.24–1.47, M≥1.7, n=165)
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
2255
Largest
M3.9
M3,0+
4
Depth range
0–28 km
Earthquakes over time
Cumulative count · 2255 earthquakes · total moment ≈ M4.1 · 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.
Gutenberg-Richter b ≈ 1.35 ± 0.11 (i.e. likely 1.23–1.46, M≥1.7, n=173)
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
3.820
Largest
M4.1
M3.0+
6
Days with data
953
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 4.3
Magnitude distribution
<11908
1–21325
2–3115
3–45
≥41
Gutenberg-Richter b ≈ 1.28 ± 0.07 (i.e. likely 1.20–1.35, M≥1.7, n=312)
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
6.482
Largest
M4.1
M3.0+
10
Days with data
1.789
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
<13731
1–22019
2–3256
3–49
≥41
Gutenberg-Richter b ≈ 1.18 ± 0.05 (i.e. likely 1.13–1.22, M≥1.7, n=583)
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
14.548
Largest
M4.4
M3.0+
68
Days with data
3.626
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
<19467
1–23822
2–3713
3–461
≥47
Gutenberg-Richter b ≈ 0.97 ± 0.02 (i.e. likely 0.95–1.00, M≥1.7, n=1453)
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
28.736
Largest
M6.6
M3.0+
139
Days with data
6.501
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 6.6
Magnitude distribution
<120108
1–26643
2–31342
3–4123
≥416
Gutenberg-Richter b ≈ 0.93 ± 0.02 (i.e. likely 0.91–0.94, M≥1.7, n=2647)
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.