Seismicity by period · derived statistics from Skjálftalísa (Icelandic Met Office)
Status (automatic)
No particular signs of unrest in the last 24 hours — 0 earthquakes recorded, within the system's normal range.
Central volcano at the tip of the Snæfellsnes Peninsula, glacier-capped. Last erupted around 200 AD. (overview — more at vedur.is) · circle on the map = rough outline of the system (radius).
Subglacial system: a subglacial eruption can cause a jökulhlaup (sudden glacial meltwater flood) with little warning, and volcanic gases (incl. SO₂, CO₂) can be dangerous near vents and may pool in hollows. These are standing features of the system, not a sign of an imminent eruption.
📜 Did you know?
Snæfellsjökull is a central volcano at the western tip of the Snæfellsnes Peninsula and the starting point of the journey in Jules Verne's 1864 novel “Journey to the Centre of the Earth”, where the descent begins in its crater. The volcano has erupted many times during the Holocene, most recently around 200 AD. In the summer of 2012 its summit became completely free of glacial ice for the first time in recorded history.
Historical eruptions in the system — points colored by size, blue circle shows where we are now in time.
Points = earthquake locations in the selected window, coloured by magnitude: ● M3+ · ● M2+ · ● smaller (a sample if more than 800).
Earthquakes
0
Largest
–
M3,0+
0
Depth range
–
Earthquakes over time
Cumulative count · 0 earthquakes · countmoment
Depth (0 km at top).
Not enough depth data.
Magnitude distribution
Earthquakes
0
Largest
–
M3,0+
0
Depth range
–
Earthquakes over time
Cumulative count · 0 earthquakes · countmoment
Depth (0 km at top).
Not enough depth data.
Magnitude distribution
Earthquakes
0
Largest
–
M3,0+
0
Depth range
–
Earthquakes over time
Cumulative count · 0 earthquakes · countmoment
Depth (0 km at top).
Not enough depth data.
Magnitude distribution
Earthquakes
2
Largest
M2.5
M3,0+
0
Depth range
1–7 km
Earthquakes over time
Cumulative count · 2 earthquakes · total moment ≈ M2.6 · countmoment
Depth (0 km at top). Grey: fixed depth.
Not enough depth data.
Magnitude distribution
Earthquakes
10
Largest
M2.9
M3,0+
0
Depth range
1–8 km
Earthquakes over time
Cumulative count · 10 earthquakes · total moment ≈ M3.0 · countmoment
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
17
Largest
M3.0
M3,0+
1
Depth range
1–8 km
Earthquakes over time
Cumulative count · 17 earthquakes · total moment ≈ M3.3 · countmoment
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.
Up = land rising (possible magma accumulation), down = subsidence. From Nevada Geodetic Lab (third-party processing, ~3-week lag, latest 2026-06-27). Interpreted deformation: Icelandic Met Office.
Earthquakes in the system
Time (UTC)
Mag
Depth (km)
Area
2026-07-07 17:57
M2.5
1.1
Other areas
2026-07-07 17:57
M2.2
6.6
Other areas
2026-06-22 18:01
M1.9
3.9
Other areas
2026-03-27 00:39
M1.4
5.2
Other areas
2026-03-24 00:39
M1.7
5.2
Other areas
2026-03-23 20:32
M1.4
7.9
Other areas
2026-03-12 11:33
M2.9
5.2
Other areas
2026-03-10 18:44
M2.1
3.9
Other areas
2026-03-03 22:06
M1.7
5.2
Other areas
2026-03-03 21:30
M1.8
5.2
Other areas
2025-07-16 01:24
M2.6
4.9
Other areas
2025-04-02 05:40
M2.2
1.1
Other areas
2025-04-01 23:44
M1.6
5.4
Other areas
2025-04-01 19:33
M2.0
1.1
Other areas
2025-04-01 15:27
M3.0
1.1
Other areas
2025-03-04 07:39
M2.2
5.2
Other areas
2024-08-08 14:39
M2.9
5.2
Other areas
What do the numbers mean — and what should I do?
β (swarm signal): how high activity is versus the area's 2-year average. β above 2 means an ongoing swarm. It measures activity, not a forecast of a large quake.
Cumulative moment (Mw): the combined energy of the quakes in the period. Uplift (GNSS): whether the ground is rising or sinking, mm per year — the data are a few weeks old. Some systems (e.g. Svartsengi) deform in steps during eruption cycles rather than at a steady annual rate.
Swarm character is computed for a whole volcanic belt, not a single system — it describes the belt, not necessarily this one system.
What should I do? This is automatic monitoring for information — not an official warning. Follow official information from the Icelandic Met Office and Civil Protection (112).