Grímsvötn

In the last 24 hours, eight earthquakes were recorded in the Grímsvötn system, indicating higher than usual activity for this area and an increase from previous days. The activity is characterized by distributed background seismicity rather than swarms and most closely resembles the period around April 29, 2025, though these are automatic preliminary results. Uplift is currently faster than the decadal average, but GNSS data are several weeks old, making short-term interpretations uncertain. Further details on trends and uplift are available below.

Iceland's most active volcano, beneath Vatnajökull. Erupts every few years to decades (last 2011, large) and causes glacial outburst floods on Skeiðarársandur. (overview — more at vedur.is) · circle on the map = rough outline of the system (radius).

In the last 24 hours, seven earthquakes were recorded in the Grímsvötn system, indicating higher than usual activity for this area and an increase from previous days. The activity is characterized by distributed background seismicity rather than swarms and most closely resembles the period around April 29, 2025. Uplift is measured at approximately 72 mm/year, which is faster than the decadal average, though GNSS data are several weeks old. These figures are automatic preliminary results, and further details are available below.

In the last 24 hours, three earthquakes were recorded in Grímsvötn, Iceland's most active volcanic system under Vatnajökull, with activity similar to the past week. Seismicity remains within normal levels for this area and is characterized by distributed background activity rather than swarms. Uplift is measured at approximately 72 mm/year, exceeding the decadal average of 53 mm/year, though GNSS data are several weeks old and results are automatic preliminary findings. Activity most closely resembles the period around April 24, 2025, and further details on trends and uplift can be found lower on the page.

In the last 24 hours, one earthquake was recorded in Grímsvötn, Iceland's most active volcanic system under Vatnajökull, indicating that activity is decreasing. Seismicity remains within normal levels for this area and is characterized by distributed background activity rather than swarms. Uplift is measured at approximately 72 mm/year, which is faster than the decadal average, though data are several weeks old and results are automatic preliminary findings. Activity most closely resembles the period around April 24, 2025, with further details on maps and trends available lower on the page.

In the last 24 hours, no seismic activity was measured in Grímsvötn, Iceland's most active volcano, and activity is decreasing compared to the weekly average. Seismicity remains within normal levels for this area and is characterized by distributed background activity rather than swarms. Land uplift is measured at approximately 72 mm/year, which is faster than the decadal average of 53 mm/year, though GNSS data are several weeks old. These automatic preliminary results most closely resemble the period around April 24, 2025, and further data can be viewed below.

In the last 24 hours, one earthquake was recorded in the Grímsvötn system, Iceland's most active volcano under Vatnajökull, indicating decreasing activity that remains within normal levels for this area. Recent activity has been characterized by distributed background seismicity rather than swarms and resembles the period around April 24, 2025. GNSS data from recent weeks shows uplift of ~71 mm/year, which is faster than the decadal average. These figures are automatic preliminary results, and further details are available below.

In the last 24 hours, three earthquakes were recorded at Grímsvötn and activity is similar to the past week, which is considered normal background activity for this area. The largest earthquake was M2.0 with a cumulative magnitude of Mw 2.1 in the last 48 hours, while uplift measures ~71 mm/year, faster than the decadal average although GNSS data are several weeks old. Activity most closely resembles the period around April 25, 2025, but results are automatic preliminary results and depth is unreliable. Further details on maps and trends can be found lower on the page.

In the last 24 hours, four earthquakes were recorded in Grímsvötn, Iceland's most active volcanic system under Vatnajökull, and an increase above the weekly average indicates rising activity although it remains within normal levels for this area. The increase is primarily due to distributed background seismicity rather than swarms, with the largest earthquake in the past 48 hours measuring M2.0 and a cumulative magnitude of Mw 2.1 for the period. Uplift in the area is currently about 71 mm/year, which is faster than the decadal average of 53 mm/year, though the data are several weeks old and results are automatic preliminary results. Activity most closely resembles the period around April 25, 2025, and further details on trends and uplift can be found lower on the page.

In the last 24 hours, two earthquakes were recorded at Grímsvötn and activity is similar to the past week, which is considered normal for this area. Seismicity is characterized by distributed background activity rather than swarms and most closely resembles the period around April 24, 2025. Uplift is measured at approximately 71 mm/year, which is faster than the decadal average, though data are several weeks old and results are automatic preliminary results. Further details on trends and uplift can be found lower on the page.

In the last 24 hours, one earthquake was recorded in Grímsvötn, Iceland's most active volcanic system under Vatnajökull, indicating that activity is decreasing. Seismicity remains within normal levels for this area and is characterized by distributed background activity rather than swarms. GNSS data show uplift of approximately 71 mm/year, which exceeds the decadal average but is uncertain over short timescales. These automatic preliminary results resemble the period around October 19, 2025, and further details are available below.

In the last 24 hours, two earthquakes were recorded in Grímsvötn, Iceland's most active volcanic system under Vatnajökull, with activity similar to the past week. This scattered background activity is within normal levels for the area, and land uplift measures approximately 70 mm per year, which is faster than the decadal average of 53 mm per year. The cumulative magnitude of the largest earthquakes in the last 48 hours is Mw 1.6, and current conditions most closely resemble the period around October 20, 2025. Results are automatic preliminary results, and further data can be found below.

In the last 24 hours, one earthquake was recorded in Grímsvötn, Iceland's most active volcanic system under Vatnajökull, and trends indicate that activity is decreasing. This scattered background activity is within normal levels for the area and most closely resembles the period around October 22, 2025. Uplift measures approximately 70 mm/year according to GNSS data that are several weeks old and show faster uplift than the decadal average. Results are automatic preliminary results, and further details can be found lower on the page.

In the last 24 hours, three earthquakes were recorded in the Grímsvötn system, Iceland's most active volcano under Vatnajökull, with activity similar to the past week. Seismicity remains within normal levels for this area and is characterized by distributed background activity rather than swarms. GNSS data from recent weeks indicate land uplift of approximately 70 mm per year, which exceeds the decadal average of 53 mm per year. These automatic preliminary results resemble the period around October 22, 2025, and further details are available below.

In the last 24 hours, six earthquakes were recorded at Grímsvötn, representing an increase compared to the weekly average but remaining within normal levels for this area. Activity has consisted of distributed background seismicity rather than swarms, and results are automatic preliminary results. Uplift in the area is currently about 69 mm/year, which is faster than the decadal average of 53 mm/year, although GNSS data are several weeks old. Further details on trends and uplift can be found lower on the page.

In the last 24 hours, five earthquakes were recorded in Grímsvötn, Iceland's most active volcanic system under Vatnajökull, and an increase above the weekly average indicates rising activity although it remains within normal levels for this area. The increase is primarily due to distributed background seismicity rather than short-lived swarms, with the largest event at M1.3 and a cumulative magnitude of Mw 1.5 over the past 48 hours. Uplift at the GFUM GNSS station is currently about 69 mm/year, exceeding the decadal average of 53 mm/year, though the data are several weeks old and results are automatic preliminary estimates. Activity most closely resembles the period around April 6, 2026, and further details on trends and uplift can be found below.

In the last 24 hours, four earthquakes were recorded in Grímsvötn, Iceland's most active volcanic system under Vatnajökull, with activity similar to the past week. Seismicity remains within normal levels for this area and is characterized by distributed background activity rather than swarms. Uplift is measured at approximately 69 mm/year, which is faster than the decadal average, though GNSS data are several weeks old and results are automatic preliminary results. Activity most closely resembles the period around April 2, 2026, and further details on trends and uplift can be found lower on the page.

In the last 24 hours, one earthquake was recorded in Grímsvötn, Iceland's most active volcanic system under Vatnajökull, indicating that activity is decreasing. Seismicity remains within normal levels for this area and is characterized by distributed background activity rather than swarms. Uplift is measured at approximately 69 mm/year, which is faster than the decadal average of 53 mm/year, though GNSS data are several weeks old. These automatic preliminary results resemble the period around March 2, 2026, and further details are available below.