Grímsvötn

In the last 24 hours, 7 earthquakes were measured in Grímsvötn, Iceland's most active volcano. Activity is increasing, now well above the weekly average (3 earthquakes per day) and monthly average (1 earthquake per day). This is slightly more activity than usual in this area, with scattered background activity rather than swarms. The largest earthquake in the last 48 hours was M1.1, and the cumulative magnitude in the same period was Mw 1.5. The land is subsiding by ~19 mm/year according to GNSS measurements (data a few weeks old). This activity is most similar to the period around June 12, 2018. These are automatic preliminary results, and depth is unreliable. Further information, maps, and trends can be found lower on the page.

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, 7 earthquakes were measured in Grímsvötn, Iceland's most active volcano. Activity is increasing, now well above the weekly average (3 earthquakes per day) and monthly average (1 earthquake per day). This is slightly more activity than usual in this area, with scattered background activity rather than swarms. The largest earthquake in the last 48 hours was M1.1, and the cumulative magnitude in the same period was Mw 1.5. The land is subsiding by ~19 mm/year according to GNSS measurements (data a few weeks old). This activity is most similar to the period around June 12, 2018. These are automatic preliminary results, and depth is unreliable. Further information, maps, and trends can be found lower on the page.

In the last 24 hours, 7 earthquakes were measured in Grímsvötn, which is Iceland's most active volcano under Vatnajökull. Activity is increasing and is now somewhat higher than usual for this area, with 7 earthquakes in the last 24 hours compared to an average of 1.0 per day (β 3.8). The largest earthquake in the last 48 hours was M1.0 and the cumulative moment was Mw 1.4. The activity is characterized by diffuse background seismicity rather than swarms, and most closely resembles a period around April 7, 2022. Ground subsidence is measured at approximately 19 mm/year (seasonally adjusted), but the decadal average is +53 mm/year. These are automatic preliminary results and depth is unreliable.

In the last 24 hours, 5 earthquakes were measured at Grímsvötn, Iceland's most active volcano, located under Vatnajökull glacier. This represents an increase in activity compared to the weekly average (2 earthquakes per day) and monthly average (1 earthquake per day). The activity is slightly higher than usual for this area, but it is characterized by diffuse background seismicity rather than swarms. The largest earthquake in the last 48 hours was M1.0, and the cumulative moment magnitude over the same period was Mw 1.3. These are automatic preliminary results.

In the last 24 hours, 4 earthquakes were measured in Grímsvötn, Iceland's most active volcano. Activity is increasing but remains within what is normal for the area. The largest earthquake in the last 48 hours was M1.3, and the cumulative moment magnitude of earthquakes in the same period was Mw 1.5. The land in Grímsvötn is subsiding by ~19 mm/year according to the latest GNSS data. The activity is most similar to a period around March 2, 2026. Results are automatic preliminary results.

In the last 24 hours, 5 earthquakes were measured at Grímsvötn, Iceland's most active volcano under Vatnajökull, which erupts every few years to decades. Activity has been increasing, with the last 24 hours well above the weekly average. This is slightly more activity than usual in this area, with a β-value of 2.1 and 4 earthquakes in the last 24 hours, compared to an average of 1.0 per day. The largest earthquake in the last 48 hours was M1.3 and the cumulative moment was Mw 1.4. The land is subsiding by ~13 mm/year according to GNSS measurements. The activity is mostly diffuse background activity rather than swarms and is most similar to the period around December 11, 2016. These are automatic preliminary results.

In the last 24 hours, 6 earthquakes were measured in the Grímsvötn volcanic system, which is Iceland's most active volcano and causes glacial floods on Skeiðarársandur. Activity has increased significantly, now well above the weekly average (1 earthquake/day). This is slightly more activity than usual in this area, with a b-value of 3.2 and a cumulative magnitude of 1.5 (Mw). The largest earthquake was M1.3, and the activity is mostly diffuse background activity rather than swarms, similar to the period around June 1, 2020. Results are automatic preliminary results.

In the last 24 hours, 6 earthquakes were measured in the Grímsvötn volcanic system, which is Iceland's most active volcano. This represents an increase in activity compared to the weekly average of 1 earthquake per day. The activity is slightly higher than usual for this area, but it is mostly characterized by diffuse background seismicity rather than earthquake swarms. The largest earthquake in the last 48 hours was M1.4, and the cumulative magnitude of the earthquakes was Mw 1.7. This activity is most similar to a period around June 13, 2019. Results are automatic preliminary results.

In the last 24 hours, 5 earthquakes were measured at Grímsvötn, Iceland's most active volcano, which is well above the weekly average. Activity is therefore increasing and is somewhat higher than usual for this area, which is characterized by diffuse background activity rather than swarms. The largest earthquake in the last 48 hours was M1.3, and the cumulative magnitude of the earthquakes was Mw 1.5. These automatic preliminary results are most similar to activity measured around June 16, 2019. Further information can be found lower on the page.

In the last 24 hours, 4 earthquakes were measured at Grímsvötn, which is Iceland's most active volcano and causes glacial floods on Skeiðarársandur. Activity is increasing but remains within what is considered normal for the area. The largest earthquake was M1.1, and the cumulative magnitude of earthquakes in the last 48 hours was Mw 1.3. These are automatic preliminary results, and the activity is most similar to a period around June 23, 2018.

Over the last 24 hours, seismic activity has been somewhat higher than usual in Grímsvötn, Iceland's most active volcano located beneath the Vatnajökull glacier, with measurements indicating increasing activity as 9 earthquakes were detected, well above the weekly average. This represents scattered background activity rather than swarms, with 90% of events over the last seven days being independent, closely resembling the period around September 9, 2024. The cumulative magnitude over the last 48 hours was Mw 1.4, with the largest earthquake measuring magnitude 1.0, though it must be noted that these are automatic preliminary results with unreliable depth estimates. According to GNSS data from a few weeks ago, the land is rising by approximately 15 mm per year based on seasonally adjusted measurements.

Over the last 24 hours, seismic activity has been increasing in Grímsvötn, Iceland's most active volcano located beneath Vatnajökull, with 11 automatic earthquakes detected, which is well above the weekly rate. This represents slightly more activity than usual for this area and is characterized as scattered background activity rather than swarms, with the largest earthquake measuring magnitude 1.0 and the cumulative magnitude over the last 48 hours at 1.4. Land uplift is still detected in the area according to older GNSS data, and the current activity most closely resembles the period around September 9, 2024, although it should be noted that these are automatic preliminary results where depth is unreliable. Further details and measurement maps can be found lower on the page.

In the last 24 hours, 10 earthquakes were recorded in the Grímsvötn system, indicating an increase above the weekly average and higher activity than usual for this area. The activity is characterized by distributed background seismicity rather than swarms and most closely resembles the period around November 26, 2025. GNSS data from recent weeks indicate land uplift of approximately 15 mm/year. These results are automatic preliminary findings, and further details are available below.

In the last 24 hours, 11 earthquakes were recorded in the Grímsvötn system, indicating an increase above the weekly average and higher activity than usual for this area. The activity is characterized by distributed background seismicity rather than swarms and most closely resembles the period around November 26, 2025. GNSS data indicate land uplift of approximately 15 mm/year, and the cumulative magnitude over the past 48 hours is Mw 1.4. These results are automatic preliminary results, and further data are available below.

In the last 24 hours, nine earthquakes were recorded in the Grímsvötn system, Iceland's most active volcanic system, indicating increasing activity above the weekly average but still within normal levels for this area. The activity is characterized by distributed background seismicity rather than swarms and most closely resembles the period around October 1, 2024. GNSS data from recent weeks indicates land uplift of approximately 18 mm per year. These results are automatic preliminary findings, and further details are available below.

In the last 24 hours, two earthquakes were recorded at Grímsvötn, Iceland's most active volcanic system under Vatnajökull, with activity similar to the past week and within normal levels for this area. The activity during this period is primarily due to distributed background seismicity rather than short-lived swarms, with the largest event having a cumulative magnitude of Mw 0.7. GNSS data from recent weeks indicate land uplift of approximately 27 mm/year, and these results are automatic preliminary findings. Further details on trends and uplift are available below.

In the last 24 hours, one earthquake was 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. GNSS measurements indicate land uplift of approximately 27 mm per year, though the data are several weeks old. These results are automatic preliminary findings, and further details are available below.

In the last 24 hours, no seismic activity was recorded at Grímsvötn and activity is decreasing compared to the weekly average, though it remains within normal levels for this area. Events over the past week are characterized by distributed background activity rather than swarms, and land uplift measures approximately 27 mm per year according to GNSS data. These automatic preliminary results most closely resemble the period around July 28, 2025, regarding earthquake count. Further details on maps and trends 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, with activity similar to the past week and within normal levels for this area. The seismicity is characterized by distributed background activity rather than swarms and most closely resembles the period around July 28, 2025, though these are automatic preliminary results. Land uplift is measured at approximately 31 mm/year according to GNSS data, which are several weeks old. Further details on trends and land uplift can be found lower on the page.