Snæfellsnes Volcanic Belt
Zone — systems within: Snæfellsjökull · Helgrindur · Ljósufjöll
Points = earthquake locations in the selected window, coloured by magnitude: M3+ · M2+ · smaller (a sample if more than 800).
Earthquakes
3
Largest
M1.0
M3,0+
0
Depth range
0–18 km
Earthquakes over time
Cumulative count · 3 earthquakes · total moment ≈ M1.2 · 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
3
Largest
M1.0
M3,0+
0
Depth range
0–18 km
Earthquakes over time
Cumulative count · 3 earthquakes · total moment ≈ M1.2 · 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
15
Largest
M1.5
M3,0+
0
Depth range
0–21 km
Earthquakes over time
Cumulative count · 15 earthquakes · total moment ≈ M1.8 · 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
74
Largest
M1.5
M3,0+
0
Depth range
0–24 km
Earthquakes over time
Cumulative count · 74 earthquakes · total moment ≈ M2.0 · count moment
Depth (0 km at top) — shallowing in the data (18.0→16.3 km). 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
319
Largest
M2.1
M3,0+
0
Depth range
0–24 km
Earthquakes over time
Cumulative count · 319 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
774
Largest
M2.1
M3,0+
0
Depth range
0–26 km
Earthquakes over time
Cumulative count · 774 earthquakes · total moment ≈ M2.8 · 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
1830
Largest
M3.1
M3,0+
3
Depth range
0–26 km
Earthquakes over time
Cumulative count · 1830 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 ≈ 1.33 ± 0.17 (i.e. likely 1.16–1.51, M≥1.7, n=70)
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
4609
Largest
M3.6
M3,0+
7
Depth range
0–26 km
Earthquakes over time
Cumulative count · 4609 earthquakes · total moment ≈ M4.0 · 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.
Gutenberg-Richter b ≈ 1.46 ± 0.08 (i.e. likely 1.38–1.55, M≥1.7, n=317)
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
4.996
Largest
M3.8
M3.0+
18
Days with data
838
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
<11982
1–21699
2–3184
3–418
≥40
Gutenberg-Richter b ≈ 1.21 ± 0.05 (i.e. likely 1.16–1.27, M≥1.7, n=482)
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
5.120
Largest
M3.8
M3.0+
22
Days with data
895
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
<11992
1–21762
2–3231
3–422
≥40
Gutenberg-Richter b ≈ 1.13 ± 0.05 (i.e. likely 1.09–1.18, M≥1.7, n=556)
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
5.148
Largest
M3.8
M3.0+
22
Days with data
908
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
<12005
1–21776
2–3232
3–422
≥40
Gutenberg-Richter b ≈ 1.13 ± 0.05 (i.e. likely 1.09–1.18, M≥1.7, n=557)
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
5.369
Largest
M5.0
M3.0+
25
Days with data
1.071
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
<12007
1–21881
2–3343
3–424
≥41
Gutenberg-Richter b ≈ 1.03 ± 0.03 (i.e. likely 1.00–1.07, M≥1.7, n=722)
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.