Volcano earthquake report for Friday, 13 Aug 2021

Quakes detected near: Brennisteinsfjöll (2 quakes between mag 0.1-1.1), Clear Lake (12 quakes between mag 0.4-1.9), Coso (9 quakes between mag 0.4-1.0), Etna (1 quake mag 3.0), Fourpeaked (1 quake mag 1.3), Hrómundartindur (18 quakes between mag 0.1-1.6)
Katla (33 quakes between mag 0.1-2.1), Kilauea (3 quakes between mag 0.6-1.9), Ljósufjöll (3 quakes between mag 1.0-1.8), Musuan (1 quake mag 2.4), Nisyros (2 quakes between mag 2.5-2.8), Nyiragongo (1 quake mag 3.0), Ruapehu (1 quake mag 1.1), Tjörnes Fracture Zone (14 quakes between mag 0.3-1.6), Udokan (1 quake mag 4.0) (updated 23h50)

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): 12 earthquakes up to magnitude 1.9

Possible earthquake swarm: 12 earthquakes occurred near (under) the volcano during 20 hours, the last being recorded quake 3 hours ago. Hypocenter depths ranged between 2.8 and 0.7 km.
Earthquake details: (only 5 largest)
1.9 quake 7km NW of The Geysers, CA, 13 Aug 2021 1:03 am (GMT -7) (16 km SSW)1.3 quake 2km SW of Cobb, CA, 13 Aug 2021 11:36 am (GMT -7) (18 km S)1.2 quake 7km NW of The Geysers, CA, 13 Aug 2021 6:53 am (GMT -7) (17 km SSW)1.2 quake 7km NW of The Geysers, CA, 12 Aug 2021 5:25 pm (GMT -7) (18 km SSW)1.0 quake 4km WNW of Cobb, CA, 13 Aug 2021 12:07 pm (GMT -7) (14 km S)All earthquakes at Clear Lake

Etna volcano (Italy): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 23 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 0 km distance SW from the volcano.
Earthquake details:
Unconfirmed quake or seismic-like event reported: 30 km north of Catania, Sicily, Italy, 13 Aug 2021 3:18 am (GMT +2) (0 km SW)All earthquakes at Etna

Hrómundartindur volcano (Iceland): 18 earthquakes up to magnitude 1.6

Possible earthquake swarm: 18 earthquakes occurred near (under) the volcano during 6 hours, the last being recorded quake 16 hours ago. Hypocenter depths ranged between 4.1 and 0.8 km.
Earthquake details: (only 5 largest)
1.6 quake Iceland: 3.4 Km SW of Skeggi_á_Hengli 13 Aug 2021 2:14 am (GMT +0) (8 km W)1.1 quake Iceland: 3.8 Km N of Hellisheiðarvirkjun 13 Aug 2021 2:21 am (GMT +0) (9 km W)1.1 quake Iceland: 2.6 Km N of Hellisheiðarvirkjun 13 Aug 2021 2:34 am (GMT +0) (9 km W)1.1 quake Iceland: 3.7 Km SW of Skeggi_á_Hengli 13 Aug 2021 8:04 am (GMT +0) (9 km W)0.9 quake Iceland: 2.8 Km N of Hellisheiðarvirkjun 13 Aug 2021 4:26 am (GMT +0) (9 km W)All earthquakes at Hrómundartindur

Katla volcano (Iceland): 33 earthquakes up to magnitude 2.1

Possible earthquake swarm: 33 earthquakes occurred near (under) the volcano during 11 hours, the last being recorded quake 12 hours ago. Hypocenter depths ranged between 9.4 and 0.1 km.
Earthquake details: (only 5 largest)
2.1 quake Iceland: 5.5 Km NNW of Hábunga 13 Aug 2021 4:32 am (GMT +0) (4 km W)1.9 quake Iceland: 5.8 Km NNW of Hábunga 13 Aug 2021 4:28 am (GMT +0) (4 km W)1.7 quake Iceland: 7.7 Km ENE of Goðabunga 13 Aug 2021 10:01 am (GMT +0) (5 km NNW)1.6 quake Iceland: 5.3 Km NNW of Hábunga 13 Aug 2021 4:46 am (GMT +0) (4 km W)1.5 quake Iceland: 5.5 Km NNW of Hábunga 13 Aug 2021 4:24 am (GMT +0) (4 km W)All earthquakes at Katla

Musuan volcano (Mindanao): magnitude 2.4 earthquake

A magnitude 2.4 earthquake occurred at the volcano 9 hours ago. The quake, which might be volcanic in origin, was located at a depth of 17.0 km depth at 15 km distance NE from the volcano.
Earthquake details:
2.4 quake 10.9 km northeast of NIA Valencia, Philippines, 13 Aug 2021 10:52 pm (GMT +8) (15 km NE)All earthquakes at Musuan

Nisyros volcano (Greece): 2 earthquakes up to magnitude 2.8

2 earthquakes occurred near (under) the volcano during 15 hours, the last being recorded quake 7 hours ago. Hypocenter depths ranged between 10.0 and 3.0 km.
Earthquake details:
2.8 quake Aegean Sea, 30 km southwest of Kos, Dodecanese, South Aegean, Greece, 13 Aug 2021 4:22 am (GMT +3) (14 km NW)2.5 quake Aegean Sea, 54 km south of Kos, Dodecanese, South Aegean, Greece, 13 Aug 2021 7:43 pm (GMT +3) (18 km SSW)All earthquakes at Nisyros

Nyiragongo volcano (Democratic Republic of Congo (DRC)): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 20 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 18 km distance S from the volcano.
Earthquake details:
Unconfirmed quake or seismic-like event reported: Near , Congo - Kinshasa, 13 Aug 2021 5:40 am (GMT +2) (18 km S)All earthquakes at Nyiragongo

Tjörnes Fracture Zone volcano (Iceland): 14 earthquakes up to magnitude 1.6

Possible earthquake swarm: 14 earthquakes occurred near (under) the volcano during 19 hours, the last being recorded quake 3 hours ago. Hypocenter depths ranged between 10.6 and 4.4 km.
Earthquake details: (only 5 largest)
1.6 quake Iceland: 18.0 Km W of Kópasker 13 Aug 2021 8:10 pm (GMT +0) (11 km E)1.6 quake Iceland: 18.0 Km W of Kópasker 13 Aug 2021 6:40 pm (GMT +0) (11 km E)1.4 quake Iceland: 13.5 Km WSW of Kópasker 13 Aug 2021 9:23 am (GMT +0) (17 km ESE)1.3 quake Iceland: 18.1 Km W of Kópasker 13 Aug 2021 6:49 pm (GMT +0) (11 km E)1.3 quake Iceland: 18.1 Km W of Kópasker 13 Aug 2021 6:39 pm (GMT +0) (11 km E)All earthquakes at Tjörnes Fracture Zone

Udokan volcano (Russia): magnitude 4.0 earthquake

A magnitude 4.0 earthquake occurred at the volcano 11 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 13 km distance SE from the volcano.
Earthquake details:
4.0 quake CHITINSKAYA OBLAST', RUSSIA, 13 Aug 2021 9:20 pm (GMT +9) (13 km SE)All earthquakes at Udokan
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