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
3
Largest
M1.1
M3,0+
0
Depth range
5–8 km
Earthquakes over time
Cumulative count · 3 earthquakes · total moment ≈ M1.1 · 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
7
Largest
M1.1
M3,0+
0
Depth range
5–9 km
Earthquakes over time
Cumulative count · 7 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
24
Largest
M1.1
M3,0+
0
Depth range
0–10 km
Earthquakes over time
Cumulative count · 24 earthquakes · total moment ≈ M1.4 · 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.
Earthquakes
95
Largest
M1.3
M3,0+
0
Depth range
0–14 km
Earthquakes over time
Cumulative count · 95 earthquakes · total moment ≈ M1.9 · count moment
Depth (0 km at top) — shallowing in the data (7.2→5.6 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
307
Largest
M1.5
M3,0+
0
Depth range
0–17 km
Earthquakes over time
Cumulative count · 307 earthquakes · total moment ≈ M2.3 · 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.
Earthquakes
1007
Largest
M2.9
M3,0+
0
Depth range
0–26 km
Earthquakes over time
Cumulative count · 1007 earthquakes · total moment ≈ M3.2 · 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
1620
Largest
M2.9
M3,0+
0
Depth range
0–26 km
Earthquakes over time
Cumulative count · 1620 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
3196
Largest
M2.9
M3,0+
0
Depth range
0–26 km
Earthquakes over time
Cumulative count · 3196 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
9.335
Largest
M4.9
M3.0+
15
Days with data
1.656
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
<16178
1–21422
2–3157
3–412
≥43
Gutenberg-Richter b ≈ 0.96 ± 0.05 (i.e. likely 0.91–1.01, M≥1.7, n=308)
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
15.610
Largest
M4.9
M3.0+
25
Days with data
3.247
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
<111249
1–22527
2–3244
3–420
≥45
Gutenberg-Richter b ≈ 0.99 ± 0.04 (i.e. likely 0.95–1.04, M≥1.7, n=523)
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
48.387
Largest
M4.9
M3.0+
87
Days with data
6.443
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 5.1
Magnitude distribution
<137619
1–28264
2–3772
3–480
≥47
Gutenberg-Richter b ≈ 1.01 ± 0.02 (i.e. likely 0.99–1.04, M≥1.7, n=1765)
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
113.022
Largest
M5.8
M3.0+
329
Days with data
10.521
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 6.4
Magnitude distribution
<185547
1–223129
2–32337
3–4286
≥443
Gutenberg-Richter b ≈ 0.98 ± 0.01 (i.e. likely 0.97–1.00, M≥1.7, n=5501)
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.