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
9
Largest
M1.9
M3,0+
0
Depth range
0–17 km
Earthquakes over time
Cumulative count · 9 earthquakes · total moment ≈ M2.1 · 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.
Earthquakes
13
Largest
M1.9
M3,0+
0
Depth range
0–17 km
Earthquakes over time
Cumulative count · 13 earthquakes · total moment ≈ M2.2 · 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
40
Largest
M1.9
M3,0+
0
Depth range
0–23 km
Earthquakes over time
Cumulative count · 40 earthquakes · total moment ≈ M2.3 · count moment
No significant hypocenter migration — activity is stationary (R²=0.07, n=40); 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
120
Largest
M2.1
M3,0+
0
Depth range
0–23 km
Earthquakes over time
Cumulative count · 120 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
2313
Largest
M3.1
M3,0+
3
Depth range
0–24 km
Earthquakes over time
Cumulative count · 2313 earthquakes · total moment ≈ M3.7 · 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.
Gutenberg-Richter b ≈ 1.50 ± 0.13 (i.e. likely 1.37–1.63, M≥1.7, n=139)
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
4134
Largest
M3.6
M3,0+
7
Depth range
0–25 km
Earthquakes over time
Cumulative count · 4134 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 ≈ 1.48 ± 0.08 (i.e. likely 1.40–1.56, M≥1.7, n=356)
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.
Data: Icelandic Met Office (Skjálftalísa API), automatic preliminary results — may change. This is not an official warning. Official warnings: vedur.is and Civil Protection (112).