Volcano earthquake report for Monday, 29 Mar 2021
World map showing volcanoes with shallow (less than 20 km) earthquakes within 20 km radius during the past 24 hours on 29 Mar 2021 Number in brackets indicate nr of quakes.

Quakes detected near: Akyarlar (1 quake mag 1.6), Askja (1 quake mag 1.0), Bardarbunga (10 quakes between mag 0.2-1.4), Brennisteinsfjöll (1 quake mag 1.1), Clear Lake (28 quakes between mag 0.3-1.4), Cosigüina (1 quake mag 3.3)
Coso (6 quakes between mag 0.6-1.3), Eldey (5 quakes between mag 0.5-2.9), Etna (1 quake mag 1.0), Fagradalsfjall (24 quakes between mag 0.1-1.6), Hengill (1 quake mag 1.6), Hrómundartindur (56 quakes between mag 0.2-2.9), Kalatungan (1 quake mag 2.1), Kilauea (1 quake mag 1.9), Krísuvík (26 quakes between mag 0.1-1.9), Mauna Loa (29 quakes between mag 0.8-2.5), Musuan (1 quake mag 2.4), Olot Field (1 quake mag 2.0), Reykjanes (21 quakes between mag 0.4-2.9), Salton Buttes (1 quake mag 1.3), Tenerife (2 quakes between mag 0.8-1.2), Tenorio (1 quake mag 2.8), Vesuvius (1 quake mag 1.0) (updated 21h50)

Note: Earthquakes within 20 km from and at depths less than 20 km under active volcanoes are reported. The list is not complete because many volcanoes are not monitored and/or seismic data in high resolution is not available publicly.

Volcanoes with recent earthquakes above magnitude 2 or more than 10 quakes are listed below:


Clear Lake volcano (California): 28 earthquakes up to magnitude 1.4

Possible earthquake swarm: 28 earthquakes occurred near (under) the volcano during 23 hours, the last being recorded quake 47 minutes ago. Hypocenter depths ranged between 5.6 and 0.6 km.
Earthquake details: (only 5 largest)
1.4 quake 4km W of Cobb, CA, USA, 28 Mar 2021 3:44 pm (GMT -7) (17 km S)1.4 quake 7km NW of The Geysers, CA, USA, 29 Mar 2021 4:02 am (GMT -7) (16 km S)1.2 quake 8km W of Cobb, CA, USA, 29 Mar 2021 11:35 am (GMT -7) (16 km SSW)1.2 quake 6km NW of The Geysers, CA, USA, 29 Mar 2021 3:13 am (GMT -7) (18 km S)1.1 quake 6km W of Cobb, CA, USA, 28 Mar 2021 3:49 pm (GMT -7) (16 km S)All earthquakes at Clear Lake

Cosigüina volcano (Nicaragua): magnitude 3.3 earthquake

A magnitude 3.3 earthquake occurred at the volcano 20 hours ago. The quake, which might be volcanic in origin, was located at a depth of 3.0 km depth at 2 km distance S from the volcano.
Earthquake details:
3.3 quake 60 km northwest of Chinandega, Nicaragua, 28 Mar 2021 7:50 pm (GMT -6) (2 km S)All earthquakes at Cosigüina

Eldey volcano (Iceland): 5 earthquakes up to magnitude 2.9

5 earthquakes occurred near (under) the volcano during 8 hours, the last being recorded quake 12 hours ago. Hypocenter depths ranged between 7.0 and 4.6 km.
Earthquake details:
2.9 quake 3.1 Km WNW of Reykjanestá, Iceland, 29 Mar 2021 4:05 am (GMT +0) (14 km NE)2.6 quake 3.4 Km WNW of Reykjanestá, Iceland, 29 Mar 2021 3:31 am (GMT +0) (14 km NE)2.1 quake 4.7 Km W of Reykjanestá, Iceland, 29 Mar 2021 2:03 am (GMT +0) (13 km NE)1.6 quake 3.2 Km WNW of Reykjanestá, Iceland, 29 March 2021 09:13 GMT (14 km NE)0.5 quake 3.3 Km WNW of Reykjanestá, Iceland, 29 Mar 2021 9:55 am (GMT +0) (14 km NE)All earthquakes at Eldey
Eldey is located at the beginning of the Reykjanes Ridge off the SW tip of Iceland. Its highest elevation is the top of Eldey Island, but most of the volcanic edifice is submerged.

Several eruptions occurred in historic times, last in 1926.

Fagradalsfjall volcano (Reykjanes Peninsula, Iceland): 24 earthquakes up to magnitude 1.6

Possible earthquake swarm: 24 earthquakes occurred near (under) the volcano during 20 hours, the last being recorded quake 4 hours ago. Hypocenter depths ranged between 7.2 and 1.3 km.
Earthquake details: (only 5 largest)
1.6 quake 4.9 Km NNE of Grindavík, Iceland, 29 March 2021 03:36 GMT (6 km WSW)1.6 quake 4.8 Km NNE of Grindavík, Iceland, 29 March 2021 03:32 GMT (6 km WSW)1.5 quake 2.9 Km S of Fagradalsfjall, Iceland, 29 Mar 2021 2:44 pm (GMT +0) (2 km S)1.4 quake 2.0 Km NE of Fagradalsfjall, Iceland, 29 March 2021 01:49 GMT (3 km NNE)1.3 quake 5.1 Km NNE of Grindavík, Iceland, 29 March 2021 04:37 GMT (6 km WSW)All earthquakes at Fagradalsfjall

Hrómundartindur volcano (Iceland): 56 earthquakes up to magnitude 2.9

Possible earthquake swarm: 56 earthquakes occurred near (under) the volcano during 8 hours, the last being recorded quake 14 hours ago. Hypocenter depths ranged between 11.1 and 0.2 km.
Earthquake details: (only 5 largest)
2.9 quake 1.2 Km W of Þrengsli, Iceland, 29 Mar 2021 4:49 am (GMT +0) (15 km WSW)2.6 quake 1.5 Km W of Þrengsli, Iceland, 29 Mar 2021 5:19 am (GMT +0) (15 km WSW)1.9 quake 1.9 Km WSW of Þrengsli, Iceland, 29 Mar 2021 6:37 am (GMT +0) (16 km WSW)1.7 quake 1.6 Km WSW of Þrengsli, Iceland, 29 Mar 2021 6:36 am (GMT +0) (16 km WSW)1.6 quake 1.5 Km WSW of Þrengsli, Iceland, 29 March 2021 06:49 GMT (16 km WSW)All earthquakes at Hrómundartindur

Kalatungan volcano (Mindanao): magnitude 2.1 earthquake

A magnitude 2.1 earthquake occurred at the volcano 21 hours ago. The quake, which might be volcanic in origin, was located at a depth of 7.0 km depth at 17 km distance SE from the volcano.
Earthquake details:
2.1 quake 14 km northwest of Maramag, Bukidnon, Northern Mindanao, Philippines, 29 March 2021 - 08:54 AM (PST) (17 km SE)All earthquakes at Kalatungan

Krísuvík volcano (Reykjanes Peninsula, Iceland): 26 earthquakes up to magnitude 1.9

Possible earthquake swarm: 26 earthquakes occurred near (under) the volcano during 22 hours, the last being recorded quake 1 hour 32 minutes ago. Hypocenter depths ranged between 9.5 and 0.6 km.
Earthquake details: (only 5 largest)
1.9 quake 6.2 Km E of Keilir, Iceland, 28 March 2021 23:09 GMT (3 km NE)1.4 quake 1.5 Km SSW of Keilir, Iceland, 29 March 2021 10:56 GMT (4 km W)1.2 quake 1.8 Km SSW of Keilir, Iceland, 29 Mar 2021 6:24 pm (GMT +0) (5 km W)1.1 quake 6.2 Km E of Keilir, Iceland, 28 Mar 2021 11:09 pm (GMT +0) (3 km NE)1.1 quake 3.2 Km NNE of Krýsuvík, Iceland, 29 March 2021 04:23 GMT (3 km ESE)All earthquakes at Krísuvík

Mauna Loa volcano (Hawai'i (Big Island)): 29 earthquakes up to magnitude 2.5

Possible earthquake swarm: 29 earthquakes occurred near (under) the volcano during 8 hours, the last being recorded quake 1 hour 14 minutes ago. Hypocenter depths ranged between 5.5 and 0.3 km.
Earthquake details: (only 5 largest)
2.5 quake 22 Km E of Honaunau-Napoopoo, Hawaii, USA, 29 Mar 2021 3:22 am (GMT -10) (4 km WSW)2.4 quake 22 Km E of Honaunau-Napoopoo, Hawaii, USA, 29 Mar 2021 3:00 am (GMT -10) (6 km WSW)2.1 quake 23 Km E of Honaunau-Napoopoo, Hawaii, USA, 29 Mar 2021 6:22 am (GMT -10) (4 km W)1.9 quake 22 Km E of Honaunau-Napoopoo, Hawaii, USA, 29 Mar 2021 7:32 am (GMT -10) (4 km W)1.4 quake 23 Km E of Honaunau-Napoopoo, Hawaii, USA, 29 Mar 2021 9:06 am (GMT -10) (4 km W)All earthquakes at Mauna Loa

Musuan volcano (Mindanao): magnitude 2.4 earthquake

A magnitude 2.4 earthquake occurred at the volcano 21 hours ago. The quake, which might be volcanic in origin, was located at a depth of 7.0 km depth at 4 km distance W from the volcano.
Earthquake details:
2.4 quake 7.7 km southwest of Valencia City, Bukidnon, Northern Mindanao, Philippines, 29 Mar 2021 8:54 am (GMT +8) (4 km W)All earthquakes at Musuan

Reykjanes volcano (Reykjanes Peninsula, Iceland): 21 earthquakes up to magnitude 2.9

Possible earthquake swarm: 21 earthquakes occurred near (under) the volcano during 20 hours, the last being recorded quake 56 minutes ago. Hypocenter depths ranged between 7.2 and 0.9 km.
Earthquake details: (only 5 largest)
2.9 quake 3.2 Km NNE of Grindavík, Iceland, 29 March 2021 02:11 GMT (6 km ESE)2.0 quake 2.9 Km NW of Reykjanestá, Iceland, 29 Mar 2021 3:24 am (GMT +0) (14 km SW)2.0 quake 3.5 Km WNW of Reykjanestá, Iceland, 29 Mar 2021 9:15 am (GMT +0) (15 km SW)1.8 quake 3.7 Km NW of Reykjanestá, Iceland, 29 Mar 2021 4:36 am (GMT +0) (14 km SW)1.7 quake 3.0 Km NW of Reykjanestá, Iceland, 29 Mar 2021 5:01 am (GMT +0) (14 km SW)All earthquakes at Reykjanes

Tenorio volcano (Costa Rica): magnitude 2.8 earthquake

A magnitude 2.8 earthquake occurred at the volcano 17 hours ago. The quake, which might be volcanic in origin, was located at a depth of 6.0 km depth at 9 km distance SE from the volcano.
Earthquake details:
2.8 quake Guatuso, Provincia de Alajuela, 26 km northeast of Canas, Costa Rica, 28 de marzo del 2021 10:21 pm (9 km SE)All earthquakes at Tenorio
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