Volcano earthquake report for Thursday, 7 Oct 2021
World map showing volcanoes with shallow (less than 20 km) earthquakes within 20 km radius during the past 24 hours on 7 Oct 2021 Number in brackets indicate nr of quakes.

Quakes detected near: Arenal (1 quake mag 2.8), Askja (1 quake mag 1.1), Cerro Singüil (1 quake mag 1.9), Clear Lake (27 quakes between mag 0.2-1.2), Coso (3 quakes between mag 0.7-1.1), Eyafjallajökull (1 quake mag 1.6)
Fagradalsfjall (8 quakes between mag 0.1-1.8), Grímsvötn (1 quake mag 1.4), Herdubreid (3 quakes between mag 0.3-1.1), Hudson (1 quake mag 2.5), Koruhüyüğü (1 quake mag 1.8), Krísuvík (89 quakes between mag 0.1-2.4), Kverkfjöll (1 quake mag 1.0), La Palma (87 quakes between mag 2.3-3.9), Little Sitkin (2 quakes between mag 0.2-2.1), Ljósufjöll (1 quake mag 2.9), Long Valley (4 quakes between mag 0.2-1.4), Milos (1 quake mag 3.7), Miyake-shima (1 quake mag 2.5), Nisyros (4 quakes between mag 1.4-3.2), Rota (1 quake mag 1.6), Telica (1 quake mag 1.3), Tjörnes Fracture Zone (1 quake mag 1.2) (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:


Arenal volcano (Costa Rica): magnitude 2.8 earthquake

A magnitude 2.8 earthquake occurred at the volcano 9 hours ago. The quake, which might be volcanic in origin, was located at a depth of 13.0 km depth at 11 km distance NNE from the volcano.
Earthquake details:
2.8 quake 37 km northwest of Ciudad Quesada, San Carlos, Provincia de Alajuela, Costa Rica, Oct 7, 2021 6:23 am (GMT -6) (11 km NNE)All earthquakes at Arenal

Clear Lake volcano (California): 27 earthquakes up to magnitude 1.2

Possible earthquake swarm: 27 earthquakes occurred near (under) the volcano during 22 hours, the last being recorded quake 1 hour 22 minutes ago. Hypocenter depths ranged between 3.6 and 1.2 km.
Earthquake details: (only 5 largest)
1.2 quake 6km WNW of The Geysers, CA, Oct 6, 2021 11:52 pm (GMT -7) (19 km S)1.1 quake 7km WNW of Cobb, CA, Oct 7, 2021 7:16 am (GMT -7) (15 km S)1.0 quake 4km WSW of Cobb, CA, Oct 7, 2021 1:39 am (GMT -7) (17 km S)1.0 quake 6km WNW of The Geysers, CA, Oct 7, 2021 3:17 am (GMT -7) (18 km SSW)1.0 quake 6km NW of The Geysers, CA, Oct 7, 2021 12:39 am (GMT -7) (17 km S)All earthquakes at Clear Lake

Hudson volcano (Southern Chile and Argentina): magnitude 2.5 earthquake

A magnitude 2.5 earthquake occurred at the volcano 5 hours ago. The quake, which might be volcanic in origin, was located at a depth of 7.0 km depth at 4 km distance NE from the volcano.
Earthquake details:
2.5 quake 75 km southwest of Coyhaique, Aysén, Chile, Oct 7, 2021 1:24 pm (GMT -3) (4 km NE)All earthquakes at Hudson

Krísuvík volcano (Reykjanes Peninsula, Iceland): 89 earthquakes up to magnitude 2.4

Possible earthquake swarm: 89 earthquakes occurred near (under) the volcano during 18 hours, the last being recorded quake 4 hours ago. Hypocenter depths ranged between 8.0 and 3.1 km.
Earthquake details: (only 5 largest)
2.4 quake Iceland: 2.2 Km SW of Keilir Oct 7, 2021 5:44 am (GMT +0) (5 km W)2.2 quake Iceland: 1.5 Km SW of Keilir Oct 7, 2021 5:56 pm (GMT +0) (4 km W)1.8 quake Iceland: 1.8 Km SSW of Keilir Oct 7, 2021 4:22 am (GMT +0) (4 km W)1.7 quake Iceland: 1.6 Km SW of Keilir Oct 7, 2021 5:49 pm (GMT +0) (5 km W)1.7 quake Iceland: 1.7 Km SSW of Keilir Oct 7, 2021 2:54 am (GMT +0) (4 km W)All earthquakes at Krísuvík

La Palma volcano (Canary Islands): 87 earthquakes up to magnitude 3.9

Possible earthquake swarm: 87 earthquakes occurred near (under) the volcano during 23 hours, the last being recorded quake 31 minutes ago. Hypocenter depths ranged between 19.0 and 8.0 km.
Earthquake details: (only 5 largest)
3.9 quake La Palma Island, 15 km southeast of Los Llanos de Aridane, Spain, Oct 6, 2021 11:42 pm (GMT +1) (3 km SSE)3.7 quake La Palma Island, 13 km southeast of Los Llanos de Aridane, Spain, Oct 6, 2021 11:50 pm (GMT +1) (2 km S)3.6 quake La Palma Island, 13 km southeast of Los Llanos de Aridane, Spain, Oct 7, 2021 4:49 pm (GMT +1) (1 km SSW)3.5 quake La Palma Island, 13 km southeast of Los Llanos de Aridane, Spain, Oct 7, 2021 6:14 pm (GMT +1) (2 km SE)3.5 quake La Palma Island, 13 km southeast of Los Llanos de Aridane, Spain, Oct 7, 2021 8:18 am (GMT +1) (3 km SE)All earthquakes at La Palma

Little Sitkin volcano (Aleutian Islands): 2 earthquakes up to magnitude 2.1

2 earthquakes occurred near (under) the volcano during 40 minutes, the last being recorded quake 17 hours ago. Hypocenter depths ranged between 7.6 and 3.1 km.
Earthquake details:
2.1 quake Rat Islands, Aleutian Islands, Alaska, Oct 6, 2021 7:34 pm (GMT -9) (11 km WNW)0.2 quake Rat Islands, Aleutian Islands, Alaska, Oct 6, 2021 8:14 pm (GMT -9) (8 km NNW)All earthquakes at Little Sitkin

Ljósufjöll volcano (Iceland): magnitude 2.9 earthquake

A magnitude 2.9 earthquake occurred at the volcano 12 hours ago. The quake, which might be volcanic in origin, was located at a depth of 4.5 km depth at 17 km distance ESE from the volcano.
Earthquake details:
2.9 quake Iceland: 27.2 Km N of Borgarnes Oct 7, 2021 9:45 am (GMT +0) (17 km ESE)All earthquakes at Ljósufjöll

Milos volcano (Greece): magnitude 3.7 earthquake

A magnitude 3.7 earthquake occurred at the volcano 15 hours ago. The quake, which might be volcanic in origin, was located at a depth of 5.0 km depth at 19 km distance N from the volcano.
Earthquake details:
3.7 quake Aegean Sea, 8.5 km northwest of Argentiera Island, Greece, Oct 7, 2021 10:06 am (GMT +3) (19 km N)All earthquakes at Milos

Miyake-shima volcano (Izu Islands): magnitude 2.5 earthquake

A magnitude 2.5 earthquake occurred at the volcano 16 hours ago. The quake, which might be volcanic in origin, was located at a depth of 9.1 km depth at 14 km distance W from the volcano.
Earthquake details:
2.5 quake Philippine Sea, 31 km southeast of Shikine-jima Island, Japan, Oct 7, 2021 3:00 pm (GMT +9) (14 km W)All earthquakes at Miyake-shima

Nisyros volcano (Greece): 4 earthquakes up to magnitude 3.2

4 earthquakes occurred near (under) the volcano during 12 hours, the last being recorded quake 12 hours ago. Hypocenter depths ranged between 16.0 and 9.3 km.
Earthquake details:
3.2 quake Aegean Sea, 45 km south of Kos, Dodecanese, South Aegean, Greece, Oct 7, 2021 8:04 am (GMT +3) (8 km S)1.9 quake Aegean Sea, 43 km south of Kos, Dodecanese, South Aegean, Greece, Oct 7, 2021 1:08 pm (GMT +3) (6 km S)1.5 quake Aegean Sea, 52 km south of Kos, Dodecanese, South Aegean, Greece, Oct 7, 2021 6:14 am (GMT +3) (16 km SSW)1.4 quake Greece: ONIKI ADALAR (MEDITERRANEAN SEA) Oct 7, 2021 1:29 am (GMT +3) (15 km S)All earthquakes at Nisyros
https://www.volcanodiscovery.com/earthquakes-volcanoes/news/143564/Volcano-earthquake-report-for-Thursday-7-Oct-2021.html