Northern Volcanic Zone
Zone — systems within: Askja · Kverkfjöll · Herðubreið · Krafla · Fremrinámur · Þeistareykir
Points = earthquake locations in the selected window, coloured by magnitude: ● M3+ · ● M2+ · ● smaller (a sample if more than 800).
Earthquakes
8
Largest
M0.4
M3,0+
0
Depth range
0–8 km
Earthquakes over time
Cumulative count · 8 earthquakes · total moment ≈ M0.6 · 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
13
Largest
M2.1
M3,0+
0
Depth range
0–11 km
Earthquakes over time
Cumulative count · 13 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
71
Largest
M2.1
M3,0+
0
Depth range
0–23 km
Earthquakes over time
Cumulative count · 71 earthquakes · total moment ≈ M2.4 · count moment
No significant hypocenter migration — activity is stationary (R²=0.01, n=71); 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
238
Largest
M2.3
M3,0+
0
Depth range
0–23 km
Earthquakes over time
Cumulative count · 238 earthquakes · total moment ≈ M2.8 · count moment
Depth (0 km at top) — shallowing in the data (5.4→4.0 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
1832
Largest
M3.2
M3,0+
1
Depth range
0–25 km
Earthquakes over time
Cumulative count · 1832 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
4525
Largest
M3.2
M3,0+
1
Depth range
0–25 km
Earthquakes over time
Cumulative count · 4525 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).