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.
Volcanic system SW of Tungnafellsjökull. Often grouped with the Tungnafellsjökull system but with its own central edifice. No known eruptions in historical time; sparse seismicity. Sits on the highland fringe, far from any settlement. (overview — more at vedur.is) · circle on the map = rough outline of the system (radius).
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Hágöngur is a pair of rhyolite mountains southwest of Vatnajökull, by the Hágöngulón reservoir, with a high-temperature geothermal field. Its volcanism is tied to fissure swarms at the boundary of the Bárðarbunga and Tungnafellsjökull systems; the central volcano itself has not erupted in the Holocene, though lavas have flowed from nearby fissures over the past millennia.
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
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
1
Largest
M0.6
M3,0+
0
Depth range
16–16 km
Earthquakes over time
Cumulative count · 1 earthquakes · total moment ≈ M0.6 · countmoment
Depth (0 km at top).
Not enough depth data.
Magnitude distribution
Earthquakes
1
Largest
M0.6
M3,0+
0
Depth range
16–16 km
Earthquakes over time
Cumulative count · 1 earthquakes · total moment ≈ M0.6 · countmoment
Depth (0 km at top).
Not enough depth data.
Magnitude distribution
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
4
Largest
M1.2
M3,0+
0
Depth range
4–16 km
Earthquakes over time
Cumulative count · 4 earthquakes · total moment ≈ M1.3 · 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.
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).