South Iceland Seismic Zone
Zone — systems within: Suðurlandsbrotabelti
Points = earthquake locations in the selected window, coloured by magnitude: ● M3+ · ● M2+ · ● smaller (a sample if more than 800).
Earthquakes
2
Largest
M0.3
M3,0+
0
Depth range
5–6 km
Earthquakes over time
Cumulative count · 2 earthquakes · total moment ≈ M0.3 · count moment
Depth (0 km at top). Grey: fixed depth.
Not enough depth data.
Magnitude distribution
Earthquakes
12
Largest
M1.2
M3,0+
0
Depth range
0–19 km
Earthquakes over time
Cumulative count · 12 earthquakes · total moment ≈ M1.5 · 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
68
Largest
M2.4
M3,0+
0
Depth range
0–26 km
Earthquakes over time
Cumulative count · 68 earthquakes · total moment ≈ M2.5 · count moment
No significant hypocenter migration — activity is stationary (R²=0.00, n=68); 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
208
Largest
M2.4
M3,0+
0
Depth range
0–35 km
Earthquakes over time
Cumulative count · 208 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
1803
Largest
M2.6
M3,0+
0
Depth range
0–35 km
Earthquakes over time
Cumulative count · 1803 earthquakes · total moment ≈ M3.3 · 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
3281
Largest
M2.6
M3,0+
0
Depth range
0–35 km
Earthquakes over time
Cumulative count · 3281 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.
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).