Volcano earthquake report for Monday, 11 Dec 2023
World map showing volcanoes with shallow (less than 50 km) earthquakes within 20 km radius during the past 24 hours on 11 Dec 2023 Number in brackets indicate nr of quakes.

Quakes detected near: Apo (1 quake mag 2.2), Askja (1 quake mag 1.0), Bardarbunga (1 quake mag 1.6), Brennisteinsfjöll (7 quakes between mag 0.1-1.1), Chaîne des Puys (1 quake mag 1.4), Clear Lake (26 quakes between mag 0.2-1.7)
Dieng (1 quake mag 2.8), Don Joao de Castro Bank (3 quakes between mag 2.5-2.6), Etna (2 quakes between mag 1.0-2.9), Fagradalsfjall (11 quakes between mag 0.3-1.0), Gagak (1 quake mag 2.8), Grímsvötn (1 quake mag 1.1), Hrómundartindur (4 quakes between mag 0.1-1.4), Jan Mayen (4 quakes between mag 1.8-4.0), Kilauea (2 quakes between mag 1.7-2.4), Krísuvík (4 quakes between mag 0.1-1.2), Loihi (1 quake mag 2.4), Nevado Chachani (1 quake mag 3.9), Prestahnukur (1 quake mag 1.7), Reykjanes (28 quakes between mag 0.1-1.9), Ruapehu (1 quake mag 1.3), San Cristobal (1 quake mag 2.3), Süphan Dağ (1 quake mag 1.9), Tjörnes Fracture Zone (1 quake mag 1.3) (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:



Apo volcano (Mindanao): magnitude 2.2 earthquake

A magnitude 2.2 earthquake occurred at the volcano 12 hours ago. The quake, which might be volcanic in origin, was located at a depth of 23.0 km depth at 19 km distance W from the volcano.
Earthquake details:
2.2 quake 1.7 km northeast of Kidapawan, Province of Cotabato, Soccsksargen, Philippines, Dec 11, 2023 08:06 pm (Manila time) (19 km W)
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.

Clear Lake volcano (California): 26 earthquakes up to magnitude 1.7

Possible earthquake swarm: 26 earthquakes occurred near (under) the volcano during 22 hours, the last being recorded quake 1 hour 26 minutes ago. Hypocenter depths ranged between 3.3 and 0.6 km.
Earthquake details: (only 5 largest)
1.7 quake 13 mi southwest of Clearlake, Lake County, California, USA, Dec 11, 2023 12:06 pm (GMT -8) (16 km S)
1.5 quake 26 mi north of Santa Rosa, Sonoma County, California, USA, Dec 11, 2023 12:57 pm (GMT -8) (19 km S)
1.5 quake 29 mi north of Santa Rosa, Sonoma County, California, USA, Dec 10, 2023 10:14 pm (GMT -8) (17 km SSW)
1.4 quake 10.4 mi southwest of Clearlake, Lake County, California, USA, Dec 11, 2023 01:30 pm (GMT -8) (13 km S)
1.4 quake 28 mi north of Santa Rosa, Sonoma County, California, USA, Dec 11, 2023 07:52 am (GMT -8) (18 km SSW)
All earthquakes at Clear Lake

Dieng volcano (Central Java): magnitude 2.8 earthquake

A magnitude 2.8 earthquake occurred at the volcano 7 hours ago. The quake, which might be volcanic in origin, was located at a depth of 11.0 km depth at 13 km distance W from the volcano.
Earthquake details:
2.8 quake 19 km northwest of Wonosobo, Central Java, Indonesia, Dec 12, 2023 12:07 am (Jakarta time) (13 km W)
All earthquakes at Dieng

Don Joao de Castro Bank volcano (Azores): 3 earthquakes up to magnitude 2.6

3 earthquakes occurred near (under) the volcano during 3 hours, the last being recorded quake 8 hours ago. Hypocenter depths ranged between 0 and 0.0 km.
Earthquake details:
2.6 quake North Atlantic Ocean, 69 km southeast of Angra do Heroismo, Azores, Portugal, Dec 11, 2023 12:41 pm (GMT -1) (1 km NNW)
2.6 quake North Atlantic Ocean, 71 km southeast of Angra do Heroismo, Azores, Portugal, Dec 11, 2023 12:44 pm (GMT -1) (14 km SW)
2.5 quake North Atlantic Ocean, 72 km southeast of Angra do Heroismo, Azores, Portugal, Dec 11, 2023 03:18 pm (GMT -1) (9 km SSW)
All earthquakes at Don Joao de Castro Bank

Etna volcano (Italy): 2 earthquakes up to magnitude 2.9

2 earthquakes occurred near (under) the volcano during 11 hours, the last being recorded quake 1 hour 52 minutes ago. Hypocenter depths ranged between 1.2 and 1.2 km.
Earthquake details:
2.9 quake 14 km northwest of Giarre, Catania, Sicily, Italy, Dec 11, 2023 01:03 pm (Rome time) (10 km NE)
1.0 quake 12 km northwest of Giarre, Catania, Sicily, Italy, Dec 11, 2023 10:58 pm (GMT +1) (11 km NE)
All earthquakes at Etna

Fagradalsfjall volcano (Reykjanes Peninsula, Iceland): 11 earthquakes up to magnitude 1.0

Possible earthquake swarm: 11 earthquakes occurred near (under) the volcano during 6 hours, the last being recorded quake 17 hours ago. Hypocenter depths ranged between 5.9 and 2.1 km.
Earthquake details: (only 5 largest)
1.0 quake Iceland: 5.2 Km NNE of Grindavík Dec 11, 2023 06:25 am (GMT +0) (6 km WSW)
0.9 quake Iceland: 5.3 Km NNE of Grindavík Dec 11, 2023 06:12 am (GMT +0) (6 km WSW)
0.7 quake Iceland: 5.5 Km WSW of Fagradalsfjall Dec 11, 2023 12:20 am (GMT +0) (6 km W)
0.7 quake Iceland: 5.7 Km WSW of Fagradalsfjall Dec 11, 2023 03:23 am (GMT +0) (6 km W)
0.6 quake Iceland: 4.2 Km W of Fagradalsfjall Dec 11, 2023 06:21 am (GMT +0) (5 km WNW)
All earthquakes at Fagradalsfjall

Gagak volcano (West Java): magnitude 2.8 earthquake

A magnitude 2.8 earthquake occurred at the volcano 4 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 15 km distance WNW from the volcano.
Earthquake details:
2.8 quake Java, Indonesia, Dec 12, 2023 03:05 am (Jakarta time) (15 km WNW)
All earthquakes at Gagak

Jan Mayen volcano (Atlantic Ocean): 4 earthquakes up to magnitude 4.0

4 earthquakes occurred near (under) the volcano during 1 hour 21 minutes, the last being recorded quake 21 hours ago. Hypocenter depths ranged between 24.0 and 3.1 km.
Earthquake details:
4.0 quake 27 km northeast of Olonkinbyen, Jan Mayen, Svalbard & Jan Mayen, Dec 11, 2023 04:15 am (Longyearbyen time) (10 km NW)
2.4 quake 35 km northeast of Olonkinbyen, Jan Mayen, Svalbard & Jan Mayen, Dec 11, 2023 02:59 am (Longyearbyen time) (12 km N)
1.9 quake 29 km northeast of Olonkinbyen, Jan Mayen, Svalbard & Jan Mayen, Dec 11, 2023 03:20 am (GMT +1) (12 km NW)
1.8 quake 31 km northeast of Olonkinbyen, Jan Mayen, Svalbard & Jan Mayen, Dec 11, 2023 02:07 am (GMT +1) (7 km N)
All earthquakes at Jan Mayen

Kilauea volcano (Hawai'i (Big Island)): 2 earthquakes up to magnitude 2.4

2 earthquakes occurred near (under) the volcano during 3 hours, the last being recorded quake 20 hours ago. Hypocenter depths ranged between 4.9 and 3.0 km.
Earthquake details:
2.4 quake 9.3 mi northeast of Pāhala, Hawaii County, USA, Dec 10, 2023 03:18 pm (Honolulu time) (15 km SW)
1.7 quake 8.9 mi northeast of Pāhala, Hawaii County, USA, Dec 10, 2023 06:14 pm (GMT -10) (16 km SW)
All earthquakes at Kilauea

Loihi volcano (Hawai'i (Big Island)): magnitude 2.4 earthquake

A magnitude 2.4 earthquake occurred at the volcano 6 hours ago. The quake, which might be volcanic in origin, was located at a depth of 32.7 km depth at 16 km distance NW from the volcano.
Earthquake details:
2.4 quake North Pacific Ocean, 14 mi southeast of Pāhala, Hawaii County, USA, Dec 11, 2023 05:51 pm (GMT +0) (16 km NW)
All earthquakes at Loihi

Nevado Chachani volcano (Peru): magnitude 3.9 earthquake

A magnitude 3.9 earthquake occurred at the volcano 4 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 15 km distance WNW from the volcano.
Earthquake details:
3.9 quake Southern Peru Dec 11, 2023 03:12 pm (Lima time) (15 km WNW)
All earthquakes at Nevado Chachani

Reykjanes volcano (Reykjanes Peninsula, Iceland): 28 earthquakes up to magnitude 1.9

Possible earthquake swarm: 28 earthquakes occurred near (under) the volcano during 19 hours, the last being recorded quake 3 hours ago. Hypocenter depths ranged between 5.8 and 1.0 km.
Earthquake details: (only 5 largest)
1.9 quake 2.4 Km NNE of Grindavík Dec 11, 2023 12:09 pm (Reykjavik time) (6 km SE)
1.3 quake Iceland: 3.4 Km NNE of Grindavík Dec 11, 2023 02:46 am (GMT +0) (6 km ESE)
1.2 quake 2.4 Km NNE of Grindavík Dec 11, 2023 01:35 am (Reykjavik time) (6 km SE)
1.1 quake Iceland: 2.2 Km NNE of Grindavík Dec 11, 2023 06:03 am (GMT +0) (6 km SE)
1.1 quake Iceland: 2.0 Km NNE of Grindavík Dec 11, 2023 05:47 am (GMT +0) (6 km SE)
All earthquakes at Reykjanes

San Cristobal volcano (Nicaragua): magnitude 2.3 earthquake

A magnitude 2.3 earthquake occurred at the volcano 50 minutes ago. The quake, which might be volcanic in origin, was located at a depth of 6.0 km depth at 3 km distance SE from the volcano.
Earthquake details:
2.3 quake 3 Km Al Sureste De Volcán San Cristóbal, Nicaragua, Dec 11, 2023 05:00 pm (Managua time) (3 km SE)
All earthquakes at San Cristobal
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