Volcano earthquake report for Thursday, 28 Sep 2023
World map showing volcanoes with shallow (less than 50 km) earthquakes within 20 km radius during the past 24 hours on 28 Sep 2023 Number in brackets indicate nr of quakes.

Quakes detected near: Abu (1 quake mag 3.2), Agua de Pau (1 quake mag 1.3), Apo (1 quake mag 2.5), Bardarbunga (4 quakes between mag 1.0-2.3), Brennisteinsfjöll (5 quakes between mag 0.4-2.3), Campi Flegrei (Phlegrean Fields) (67 quakes between mag 0.1-3.0)
Clear Lake (31 quakes between mag 0.5-2.5), Coso (1 quake mag 1.0), Eldey (3 quakes between mag 1.0-1.2), Etna (2 quakes between mag 1.2-3.0), Fagradalsfjall (7 quakes between mag 0.5-1.1), Grímsvötn (5 quakes between mag 1.2-2.3), Herdubreid (1 quake mag 1.2), Hofsjökull volcano (1 quake mag 1.7), Hrómundartindur (1 quake mag 1.0), Jan Mayen (1 quake mag 1.5), Katla (2 quakes between mag 0.5-1.6), Koruhüyüğü (4 quakes between mag 1.4-3.9), Krafla (2 quakes between mag 0.3-1.1), Krísuvík (1 quake mag 1.0), La Palma (1 quake mag 1.4), Laacher See (1 quake mag 3.0), Martin (3 quakes between mag 0.2-1.0), Nevado Chachani (1 quake mag 3.6), Nevado del Ruiz (4 quakes between mag 1.4-3.8), Parker (1 quake mag 2.0), Reykjanes (34 quakes between mag 0.1-3.3), Salton Buttes (1 quake mag 1.2), Tenerife (3 quakes between mag 0.6-1.7), Terceira (2 quakes between mag 1.5-2.1), Vesuvius (2 quakes between mag 0.4-1.5), Wide Bay (1 quake mag 1.6) (updated 15h50)

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:



Abu volcano (Honshu): magnitude 3.2 earthquake

A magnitude 3.2 earthquake occurred at the volcano 6 hours ago. The quake, which might be volcanic in origin, was located at a depth of 11.7 km depth at 4 km distance NNW from the volcano.
Earthquake details:
3.2 quake 21 km northeast of Hagi, Yamaguchi, Japan, Sep 28, 2023 6:34 pm (GMT +9) (4 km NNW)
All earthquakes at Abu

Apo volcano (Mindanao): magnitude 2.5 earthquake

A magnitude 2.5 earthquake occurred at the volcano 3 hours ago. The quake, which might be volcanic in origin, was located at a depth of 1.0 km depth at 13 km distance NE from the volcano.
Earthquake details:
2.5 quake 28 km west of Central, Province of Davao del Sur, Philippines, Sep 28, 2023 8:21 pm (GMT +8) (13 km NE)
All earthquakes at Apo
Apo volcano (2938 m) on Mindanao forms the highest peak of the Philippines. Its volcanic history is not well known, but although there are no historic eruptions it is considered to be active.

The volcano has an extensive hydrothermal field with ongoing geothermal exploration. Small shallow earthquakes related to this activity are common.

Bardarbunga volcano (Iceland): 4 earthquakes up to magnitude 2.3

4 earthquakes occurred near (under) the volcano during 9 hours, the last being recorded quake 13 hours ago. Hypocenter depths ranged between 2.6 and 0.6 km.
Earthquake details:
2.3 quake Iceland: 3.7 Km SSE of Bárðarbunga Sep 28, 2023 3:04 am (GMT +0) (3 km SE)
1.4 quake Iceland: 5.2 Km ESE of Bárðarbunga Sep 27, 2023 7:21 pm (GMT +0) (5 km E)
1.4 quake Iceland: 3.0 Km SSW of Bárðarbunga Sep 27, 2023 5:58 pm (GMT +0) (2 km SSW)
1.0 quake Iceland: 6.7 Km ENE of Bárðarbunga Sep 27, 2023 7:00 pm (GMT +0) (7 km NE)
All earthquakes at Bardarbunga

Brennisteinsfjöll volcano (Reykjanes Peninsula, Iceland): 5 earthquakes up to magnitude 2.3

5 earthquakes occurred near (under) the volcano during 5 hours, the last being recorded quake 4 hours ago. Hypocenter depths ranged between 7.3 and 0.8 km.
Earthquake details:
2.3 quake Iceland: 3.9 Km N of Helgafell Sep 28, 2023 7:42 am (GMT +0) (14 km N)
2.0 quake Iceland: 3.9 Km NNE of Helgafell Sep 28, 2023 8:32 am (GMT +0) (13 km N)
1.1 quake Iceland: 7.4 Km WSW of Raufarhólshellir Sep 28, 2023 7:09 am (GMT +0) (14 km E)
0.5 quake Iceland: 5.2 Km WSW of Raufarhólshellir Sep 28, 2023 12:07 pm (GMT +0) (16 km E)
0.4 quake Iceland: 5.3 Km WSW of Raufarhólshellir Sep 28, 2023 12:06 pm (GMT +0) (16 km E)
All earthquakes at Brennisteinsfjöll

Campi Flegrei (Phlegrean Fields) volcano (Italy): 67 earthquakes up to magnitude 3.0

Possible earthquake swarm: 67 earthquakes occurred near (under) the volcano during 21 hours, the last being recorded quake 58 minutes ago. Hypocenter depths ranged between 10.0 and 0.1 km.
Earthquake details: (only 5 largest)
Reported seismic-like event (likely no quake): 16 km west of Naples, Neapel, Campania, Italy, Sep 28, 2023 9:20 am (GMT +2) (10 km NW)
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)
1.8 quake 5.4 km west of Fuorigrotta, Neapel, Campania, Italy, Sep 28, 2023 4:42 pm (GMT +2) (0 km NW)
1.6 quake Italy: Campi Flegrei Sep 27, 2023 10:25 pm (GMT +2) (0 km W)
1.5 quake Italy: Campi Flegrei Sep 28, 2023 1:14 am (GMT +2) (1 km WSW)
All earthquakes at Campi Flegrei (Phlegrean Fields)

Clear Lake volcano (California): 31 earthquakes up to magnitude 2.5

Possible earthquake swarm: 31 earthquakes occurred near (under) the volcano during 21 hours, the last being recorded quake 1 hour 13 minutes ago. Hypocenter depths ranged between 6.4 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)
1.6 quake 5 Km WNW of Cobb, CA, Sep 28, 2023 7:37 am (GMT -7) (15 km S)
1.4 quake 7 Km NW of The Geysers, CA, Sep 28, 2023 3:09 am (GMT -7) (18 km SSW)
1.3 quake 5 Km NW of The Geysers, CA, Sep 27, 2023 10:50 am (GMT -7) (17 km S)
1.2 quake 7 Km NW of The Geysers, CA, Sep 27, 2023 8:22 pm (GMT -7) (16 km S)
All earthquakes at Clear Lake

Etna volcano (Italy): 2 earthquakes up to magnitude 3.0

2 earthquakes occurred near (under) the volcano during 16 hours, the last being recorded quake 2 hours ago. Hypocenter depths ranged between 10.0 and 4.7 km.
Earthquake details:
Reported seismic-like event (likely no quake): 22 km northwest of Acireale, Catania, Sicily, Italy, Sep 28, 2023 3:40 pm (GMT +2) (11 km SW)
1.2 quake Italy: 8 Km W Milo (CT) Sep 27, 2023 11:40 pm (GMT +2) (3 km E)
All earthquakes at Etna

Grímsvötn volcano (Iceland): 5 earthquakes up to magnitude 2.3

5 earthquakes occurred near (under) the volcano during 15 hours, the last being recorded quake 3 hours ago. Hypocenter depths ranged between 8.5 and 1.4 km.
Earthquake details:
2.3 quake Iceland: 2.0 Km WSW of Grímsfjall Sep 28, 2023 12:30 pm (GMT +0) (3 km SSE)
2.1 quake Iceland: 4.6 Km NE of Grímsfjall Sep 28, 2023 11:40 am (GMT +0) (6 km ENE)
1.3 quake Iceland: 1.2 Km SSW of Grímsfjall Sep 27, 2023 9:51 pm (GMT +0) (4 km SE)
1.2 quake Iceland: 2.9 Km WSW of Grímsfjall Sep 28, 2023 6:32 am (GMT +0) (2 km S)
1.2 quake Iceland: 4.6 Km WSW of Grímsfjall Sep 27, 2023 9:09 pm (GMT +0) (4 km SSW)
All earthquakes at Grímsvötn

Koruhüyüğü volcano (Turkey): 4 earthquakes up to magnitude 3.9

4 earthquakes occurred near (under) the volcano during 8 hours, the last being recorded quake 3 hours ago. Hypocenter depths ranged between 10.5 and 5.6 km.
Earthquake details:
3.9 quake Hatay, 35 km southeast of Osmaniye, Turkey, Sep 28, 2023 8:01 am (GMT +3) (8 km WNW)
2.7 quake Hatay, 34 km southeast of Osmaniye, Turkey, Sep 28, 2023 9:11 am (GMT +3) (10 km NW)
1.5 quake Turkey: ARPALIUSAGI-HASSA (HATAY) Sep 28, 2023 8:49 am (GMT +3) (17 km WSW)
1.4 quake Turkey: İslahiye (Gaziantep) Sep 28, 2023 3:48 pm (GMT +3) (12 km NW)
All earthquakes at Koruhüyüğü

Laacher See volcano (Germany): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 13 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 18 km distance SE from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): 8.8 km southwest of Koblenz, Rheinland-Pfalz, Germany, Sep 28, 2023 4:24 am (GMT +2) (18 km SE)
All earthquakes at Laacher See

Nevado Chachani volcano (Peru): magnitude 3.6 earthquake

A magnitude 3.6 earthquake occurred at the volcano 13 hours ago. The quake, which might be volcanic in origin, was located at a depth of 18.0 km depth at 15 km distance WNW from the volcano.
Earthquake details:
3.6 quake 32 km northwest of Arequipa, Peru, Sep 27, 2023 10:08 pm (GMT -5) (15 km WNW)
All earthquakes at Nevado Chachani

Nevado del Ruiz volcano (Colombia): 4 earthquakes up to magnitude 3.8

4 earthquakes occurred near (under) the volcano during 2 hours, the last being recorded quake 3 hours ago. Hypocenter depths ranged between 3.5 and 0.2 km.
Earthquake details:
3.8 quake 50 km north of Ibagué, Departamento de Tolima, Colombia, Sep 28, 2023 6:14 am (GMT -5) (2 km SSE)
3.5 quake Departamento de Tolima, 31 km southeast of Manizales, Caldas, Colombia, Sep 28, 2023 5:12 am (GMT -5) (2 km SSE)
1.7 quake Colombia Sep 28, 2023 7:29 am (GMT -5) (3 km S)
1.4 quake Colombia Sep 28, 2023 6:09 am (GMT -5) (4 km SW)
All earthquakes at Nevado del Ruiz

Reykjanes volcano (Reykjanes Peninsula, Iceland): 34 earthquakes up to magnitude 3.3

Possible earthquake swarm: 34 earthquakes occurred near (under) the volcano during 16 hours, the last being recorded quake 7 hours ago. Hypocenter depths ranged between 8.8 and 1.1 km.
Earthquake details: (only 5 largest)
3.3 quake Iceland: 2.2 Km N of Reykjanestá Sep 27, 2023 9:57 pm (GMT +0) (13 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)
1.7 quake Iceland: 3.2 Km N of Reykjanestá Sep 28, 2023 9:07 am (GMT +0) (10 km SW)
1.4 quake Iceland: 2.8 Km NNE of Reykjanestá Sep 28, 2023 12:10 am (GMT +0) (11 km SW)
All earthquakes at Reykjanes

Terceira volcano (Azores): 2 earthquakes up to magnitude 2.1

2 earthquakes occurred near (under) the volcano during 7 hours, the last being recorded quake 13 hours ago. Hypocenter depths ranged between 1.0 and 0.0 km.
Earthquake details:
2.1 quake North Atlantic Ocean, 18 km northwest of Angra do Heroismo, Azores, Portugal, Sep 28, 2023 3:10 am (GMT +0) (6 km NW)
1.5 quake Portugal: Vulcao De Sta. Barbara (Terceira) Sep 27, 2023 8:18 pm (GMT +0) (2 km NNE)
All earthquakes at Terceira
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