Volcano earthquake report for Wednesday, 27 Sep 2023
World map showing volcanoes with shallow (less than 50 km) earthquakes within 20 km radius during the past 24 hours on 27 Sep 2023 Number in brackets indicate nr of quakes.

Quakes detected near: Akyarlar (1 quake mag 2.5), Bardarbunga (3 quakes between mag 1.0-1.4), Bibinoi (1 quake mag 2.9), Brennisteinsfjöll (2 quakes between mag 0.9-1.0), Campi Flegrei (Phlegrean Fields) (72 quakes between mag 0.1-4.2), Cerro Bravo (1 quake mag 1.4)
Clear Lake (23 quakes between mag 0.3-2.5), Coso (1 quake mag 1.0), Eldey (11 quakes between mag 0.9-1.8), Etna (1 quake mag 1.2), Eyafjallajökull (1 quake mag 1.9), Grímsvötn (2 quakes between mag 1.2-1.3), Hofsjökull volcano (1 quake mag 1.7), Karapinar (1 quake mag 1.1), Katla (3 quakes between mag 0.5-1.2), Korovin (1 quake mag 1.2), Krísuvík (3 quakes between mag 0.4-1.0), La Palma (1 quake mag 1.4), Martin (7 quakes between mag 0.1-1.4), Olot Field (1 quake mag 1.3), Reykjanes (134 quakes between mag 0.1-3.5), Tambora (1 quake mag 2.6), Tanaga (1 quake mag 2.0), Terceira (2 quakes between mag 1.5-1.6), Tres Virgenes (1 quake mag 3.5), Vesuvius (1 quake mag 1.5) (updated 23h50)

Note: Earthquakes within 20 km from and at depths less than 50 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:



Akyarlar volcano (Turkey): magnitude 2.5 earthquake

A magnitude 2.5 earthquake occurred at the volcano 4 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:
2.5 quake Aegean Sea, 14 km east of Kos, Dodecanese, South Aegean, Greece, Sep 27, 2023 11:02 pm (GMT +3) (17 km SE)
All earthquakes at Akyarlar

Bibinoi volcano (Halmahera): magnitude 2.9 earthquake

A magnitude 2.9 earthquake occurred at the volcano 9 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 17 km distance W from the volcano.
Earthquake details:
2.9 quake Halmahera, Indonesia, Sep 27, 2023 11:42 pm (GMT +9) (17 km W)
All earthquakes at Bibinoi

Campi Flegrei (Phlegrean Fields) volcano (Italy): 72 earthquakes up to magnitude 4.2

Possible earthquake swarm: 72 earthquakes occurred near (under) the volcano during 23 hours, the last being recorded quake 36 minutes ago. Hypocenter depths ranged between 10.0 and 0.1 km.
Earthquake details: (only 5 largest)
4.2 quake Tyrrhenian Sea, 10.2 km southwest of Naples, Neapel, Campania, Italy, Sep 27, 2023 3:35 am (GMT +2) (2 km SE)
Reported seismic-like event (likely no quake): 9.6 km southwest of Naples, Neapel, Campania, Italy, Sep 27, 2023 1:52 am (GMT +2) (2 km ESE)
2.5 quake Tyrrhenian Sea, 11 km west of Naples, Neapel, Campania, Italy, Sep 27, 2023 11:16 am (GMT +2) (1 km SSE)
2.1 quake 5.1 km west of Fuorigrotta, Neapel, Campania, Italy, Sep 27, 2023 10:45 am (GMT +2) (1 km SSE)
2.1 quake Tyrrhenian Sea, 5.5 km west of Fuorigrotta, Neapel, Campania, Italy, Sep 27, 2023 11:00 pm (GMT +2) (1 km S)
All earthquakes at Campi Flegrei (Phlegrean Fields)

Clear Lake volcano (California): 23 earthquakes up to magnitude 2.5

Possible earthquake swarm: 23 earthquakes occurred near (under) the volcano during 20 hours, the last being recorded quake 54 minutes ago. Hypocenter depths ranged between 12.5 and 0.7 km.
Earthquake details: (only 5 largest)
2.5 quake 14 mi southwest of Clearlake, Lake County, California, USA, Sep 27, 2023 2:49 pm (GMT -7) (16 km SSW)
1.4 quake 4 Km W of Cobb, CA, Sep 27, 2023 8:37 am (GMT -7) (17 km S)
1.3 quake 5 Km NW of The Geysers, CA, Sep 27, 2023 10:50 am (GMT -7) (17 km S)
1.3 quake 4 Km W of Cobb, CA, Sep 27, 2023 2:26 am (GMT -7) (17 km S)
1.2 quake 10 Km NW of The Geysers, CA, Sep 27, 2023 2:51 pm (GMT -7) (16 km SSW)
All earthquakes at Clear Lake

Eldey volcano (Iceland): 11 earthquakes up to magnitude 1.8

Possible earthquake swarm: 11 earthquakes occurred near (under) the volcano during 17 hours, the last being recorded quake 5 hours ago. Hypocenter depths ranged between 19.8 and 3.2 km.
Earthquake details: (only 5 largest)
1.8 quake Iceland: 8.2 Km NNE of Geirfuglasker Sep 27, 2023 3:13 pm (GMT +0) (9 km WNW)
1.5 quake Iceland: 10.2 Km NNW of Geirfuglasker Sep 27, 2023 11:05 am (GMT +0) (14 km WNW)
1.4 quake Iceland: 7.4 Km N of Geirfuglasker Sep 27, 2023 12:11 pm (GMT +0) (11 km WNW)
1.3 quake Iceland: 9.9 Km NW of Eldey Sep 27, 2023 5:50 am (GMT +0) (10 km NNW)
1.2 quake Iceland: 11.9 Km N of Geirfuglasker Sep 27, 2023 6:02 pm (GMT +0) (12 km NW)
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.

Reykjanes volcano (Reykjanes Peninsula, Iceland): 134 earthquakes up to magnitude 3.5

Possible earthquake swarm: 134 earthquakes occurred near (under) the volcano during 24 hours, the last being recorded quake 19 minutes ago. Hypocenter depths ranged between 19.6 and 1.1 km.
Earthquake details: (only 5 largest)
3.5 quake Iceland: 8.1 Km WNW of Grindavík Sep 27, 2023 3:09 pm (GMT +0) (5 km SW)
3.3 quake Iceland: 2.2 Km N of Reykjanestá Sep 27, 2023 9:57 pm (GMT +0) (12 km SW)
2.5 quake Iceland: 2.1 Km N of Reykjanestá Sep 27, 2023 9:59 pm (GMT +0) (12 km SW)
2.4 quake Iceland: 4.3 Km NNE of Reykjanestá Sep 27, 2023 9:55 pm (GMT +0) (10 km SW)
2.4 quake Iceland: 8.3 Km WNW of Grindavík Sep 27, 2023 12:00 am (GMT +0) (5 km SW)
All earthquakes at Reykjanes

Tambora volcano (Sumbawa): magnitude 2.6 earthquake

A magnitude 2.6 earthquake occurred at the volcano 9 hours ago. The quake, which might be volcanic in origin, was located at a depth of 18.0 km depth at 18 km distance WNW from the volcano.
Earthquake details:
2.6 quake 58 km northeast of Sumbawa Besar, Indonesia, Sep 27, 2023 10:36 pm (GMT +8) (18 km WNW)
All earthquakes at Tambora

Tres Virgenes volcano (Baja California, NW Mexico & Mexican Islands): magnitude 3.5 earthquake

A magnitude 3.5 earthquake occurred at the volcano 15 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 2 km distance SSW from the volcano.
Earthquake details:
3.5 quake 35 km west of Santa Rosalia, Mulegé, Baja California Sur, Mexico, Sep 27, 2023 1:35 am (GMT -7) (2 km SSW)
All earthquakes at Tres Virgenes
https://www.volcanodiscovery.com/earthquakes-volcanoes/news/221907/Volcano-earthquake-report-for-Wednesday-27-Sep-2023.html