🌊 Volcanic tremor — Tjörnes / Grímsey — The seismic tremor baseline is currently elevated compared to recent days and cannot be a…

IMO tremor plot (station gri). Most of the signal is weather and surf — not eruption confirmation. All stations: vedur.is ↗.

Weather now: wind 6 m/s (Flatey á Skjálfanda), waves 2.2 m — moderate.

The seismic tremor baseline is currently elevated compared to recent days and cannot be attributed to weather conditions. (AI)

Band analysis past 9 days (from digitized RSAM values). High 2-4 Hz + low 0.5-1 Hz = possible magma-movement signal; high 0.5-1 Hz without 2-4 Hz = weather/surf.

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.

Uplift — GNSS deformation (Reykjanes)

Crustal deformation from continuous GNSS (Nevada Geodetic Lab, Eurasia plate-fixed). Up = land rising (possible magma accumulation), down = subsidence. Daily final solution with about a three-week lag (latest 2026-08-29); third-party reprocessing, not the Met Office real-time solution.

InSAR. InSAR (Sentinel-1 radar) maps surface deformation across the whole area, complementing the GNSS point measurements. Raw interferograms need expertise to read, so they are not shown here — interpreted deformation maps and current status: Icelandic Met Office · raw data: COMET LiCSAR.

Gas / SO₂. Volcanic gas (SO₂) is not shown here from raw data — Sentinel-5P TROPOMI needs heavy integration and is often faint at high latitudes outside major eruptions. Interpreted gas monitoring: air quality (Environment Agency) · MOUNTS Reykjanes ↗ · Copernicus atmosphere.