Volcano earthquake report for Saturday, 1 Nov 2025

Quakes detected near: Arenal (1 quake mag 2.2), Banahaw (1 quake mag 3.0), Barva (1 quake mag 2.6), Biliran (1 quake mag 1.7), Campi Flegrei (Phlegrean Fields) (22 quakes between mag 0.1-2.0), Cerro Negro de Mayasquer (1 quake mag 1.9)
Clear Lake (23 quakes between mag 0.2-2.1), Coso (3 quakes between mag 0.9-1.0), Dieng (1 quake mag 3.2), El Chichón (24 quakes between mag 1.7-3.1), Esjufjöll (2 quakes between mag 0.9-1.2), Etna (1 quake mag 1.0), Gran Canaria (10 quakes between mag 0.2-3.0), Hofsjökull (2 quakes between mag 1.9-2.5), Katla (2 quakes between mag 1.5-2.1), Kolumbo (5 quakes between mag 0.8-1.2), Koruhüyüğü (1 quake mag 1.5), Krafla (1 quake mag 1.0), Krísuvík (10 quakes between mag 0.2-2.0), Kula (1 quake mag 2.3), Ljósufjöll (1 quake mag 1.5), Loki-Fögrufjöll volcano (1 quake mag 1.6), Milos (1 quake mag 2.8), Nantai (7 quakes between mag 0.3-1.0), Nisyros (1 quake mag 3.4), Okataina (Tarawera) (6 quakes between mag 1.6-3.3), Olot Field (1 quake mag 3.0), Oshima (1 quake mag 1.4), Platanar (1 quake mag 1.6), Reporoa (1 quake mag 1.6), Salton Buttes (3 quakes between mag 1.1-1.7), Santa Clara (1 quake mag 3.0), Santorini (2 quakes between mag 0.7-1.4), Sarik-Gajah (3 quakes between mag 2.6-3.3), Tenerife (2 quakes between mag 0.7-1.1), Tenorio (1 quake mag 1.9), Terceira (2 quakes between mag 2.1-2.3), To-shima (1 quake mag 1.7), Vesuvius (5 quakes between mag 0.1-1.2), Washiba-Kumonotaira (2 quakes between mag 0.1-1.7), White Island (2 quakes between mag 1.8-2.0) (updated 01h50)

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:

Arenal volcano (Costa Rica): magnitude 2.2 earthquake

A magnitude 2.2 earthquake occurred at the volcano 17 hours ago. The quake, which might be volcanic in origin, was located at a depth of 6.00 km depth at 12 km distance E from the volcano.
Earthquake details:
2.2 quake 23 km northwest of Quesada, Provincia de Alajuela, Costa Rica, Oct 31, 2025 02:34 am (Costa Rica time) (12 km E)
All earthquakes at Arenal

Banahaw volcano (Luzon Island): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 15 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 8 km distance WNW from the volcano.
Earthquake details:
Reported quake or seismic-like event: 33 km southwest of Quezon City, Philippines, Oct 31, 2025 07:16 pm (GMT +8) (8 km WNW)
All earthquakes at Banahaw

Barva volcano (Costa Rica): magnitude 2.6 earthquake

A magnitude 2.6 earthquake occurred at the volcano 19 hours ago. The quake, which might be volcanic in origin, was located at a depth of 7.00 km depth at 11 km distance N from the volcano.
Earthquake details:
2.6 quake Provincia de Heredia, 33 km north of San Jose, Provincia de San Jose, Costa Rica, Oct 31, 2025 12:57 am (Costa Rica time) (11 km N)
All earthquakes at Barva

Campi Flegrei (Phlegrean Fields) volcano (Italy): 22 earthquakes up to magnitude 2.0

Possible earthquake swarm: 22 earthquakes occurred near (under) the volcano during 21 hours, the last being recorded quake 2 hours ago. Hypocenter depths ranged between 2.97 and 0.03 km.
Earthquake details: (only 5 largest)
2.0 quake 2 km southeast of Pozzuoli, Napoli, Campania, Italy, Oct 31, 2025 03:30 am (Rome time) (2 km WNW)
1.6 quake 2.4 km southwest of Pozzuoli, Napoli, Campania, Italy, Oct 31, 2025 05:04 pm (Rome time) (5 km W)
1.2 quake 1.8 km southwest of Pozzuoli, Napoli, Campania, Italy, Oct 31, 2025 10:04 pm (Rome time) (5 km W)
1.1 quake Tyrrhenian Sea, 20 km northeast of Isola d'Ischia Island, Italy, Oct 31, 2025 09:10 pm (Rome time) (2 km SW)
1.1 quake 1.8 km southwest of Pozzuoli, Napoli, Campania, Italy, Oct 31, 2025 07:23 pm (Rome time) (5 km W)
All earthquakes at Campi Flegrei (Phlegrean Fields)

Clear Lake volcano (California): 23 earthquakes up to magnitude 2.1

Possible earthquake swarm: 23 earthquakes occurred near (under) the volcano during 17 hours, the last being recorded quake 7 hours ago. Hypocenter depths ranged between 11.58 and 0.76 km.
Earthquake details: (only 5 largest)
2.1 quake 12 mi southwest of Clearlake, Lake County, California, United States, Oct 31, 2025 05:05 am (Los Angeles time) (16 km S)
1.7 quake 13 mi southwest of Clearlake, Lake County, California, United States, Oct 31, 2025 10:58 am (Los Angeles time) (19 km S)
1.2 quake Lake County, 25 mi north of Santa Rosa, Sonoma County, California, United States, Oct 31, 2025 12:06 pm (Los Angeles time) (19 km S)
1.1 quake 27 mi north of Santa Rosa, Sonoma County, California, United States, Oct 31, 2025 07:52 am (Los Angeles time) (17 km SSW)
1.0 quake 27 mi north of Santa Rosa, Sonoma County, California, United States, Oct 31, 2025 12:24 am (Los Angeles time) (17 km SSW)
All earthquakes at Clear Lake

Dieng volcano (Central Java): magnitude 3.2 earthquake

A magnitude 3.2 earthquake occurred at the volcano 17 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 11 km distance N from the volcano.
Earthquake details:
3.2 quake Kabupaten Batang, 27 km north of Wonosobo, Indonesia, Oct 31, 2025 03:51 pm (Jakarta time) (11 km N)
All earthquakes at Dieng

El Chichón volcano (Southern Mexico): 24 earthquakes up to magnitude 3.1

Possible earthquake swarm: 24 earthquakes occurred near (under) the volcano during 18 hours, the last being recorded quake 5 hours ago. Hypocenter depths ranged between 4.30 and 2.50 km.
Earthquake details: (only 5 largest)
3.1 quake Estado de Chiapas, 36 km southwest of Teapa, Estado de Tabasco, Mexico, Oct 31, 2025 07:53 am (Merida time) (1 km N)
3.0 quake Estado de Chiapas, 36 km southwest of Teapa, Estado de Tabasco, Mexico, Oct 31, 2025 04:38 am (Merida time) (1 km N)
3.0 quake Estado de Chiapas, 37 km southwest of Teapa, Estado de Tabasco, Mexico, Oct 31, 2025 02:39 pm (Merida time) (1 km WSW)
2.8 quake Estado de Chiapas, 37 km southwest of Teapa, Estado de Tabasco, Mexico, Oct 31, 2025 12:14 am (Merida time) (0 km SW)
2.7 quake Estado de Chiapas, 36 km southwest of Teapa, Estado de Tabasco, Mexico, Oct 30, 2025 10:33 pm (Merida time) (1 km NW)
All earthquakes at El Chichón

Gran Canaria volcano (Canary Islands): 10 earthquakes up to magnitude 3.0

10 earthquakes occurred near (under) the volcano during 21 hours, the last being recorded quake 3 hours ago. Hypocenter depths ranged between 10.00 and 1.00 km.
Earthquake details: (only 5 largest)
Reported seismic-like event (likely no quake): 27 km west of Las Palmas de Gran Canaria, Las Palmas, Canary Islands, Spain, Oct 31, 2025 09:53 pm (GMT +0) (10 km NW)
0.9 quake 26 km west of Las Palmas de Gran Canaria, Las Palmas, Canary Islands, Spain, Oct 31, 2025 12:39 pm (Universal Time) (7 km WNW)
0.8 quake 25 km west of Las Palmas de Gran Canaria, Las Palmas, Canary Islands, Spain, Oct 31, 2025 11:30 am (Universal Time) (6 km NW)
0.8 quake 26 km west of Las Palmas de Gran Canaria, Las Palmas, Canary Islands, Spain, Oct 31, 2025 10:21 am (Universal Time) (7 km WNW)
0.7 quake 26 km west of Las Palmas de Gran Canaria, Las Palmas, Canary Islands, Spain, Oct 31, 2025 12:42 pm (Universal Time) (7 km WNW)
All earthquakes at Gran Canaria

Hofsjökull volcano (Iceland): 2 earthquakes up to magnitude 2.5

2 earthquakes occurred near (under) the volcano during 79 seconds, the last being recorded quake 13 hours ago. Hypocenter depths ranged between 3.20 and 2.60 km.
Earthquake details:
2.5 quake 31.0 km E of Hveravellir Oct 31, 2025 12:43 pm (Reykjavik time) (10 km N)
1.9 quake 31.0 km WSW of Laugafell Oct 31, 2025 12:42 pm (Reykjavik time) (11 km N)
All earthquakes at Hofsjökull

Katla volcano (Iceland): 2 earthquakes up to magnitude 2.1

2 earthquakes occurred near (under) the volcano during 7 hours, the last being recorded quake 3 hours ago. Hypocenter depths ranged between 0.60 and 0.10 km.
Earthquake details:
2.1 quake 6.9 km NNE of Hábunga Oct 31, 2025 03:39 pm (Reykjavik time) (1 km N)
1.5 quake Iceland: 8.9 km NE of Goðabunga Oct 31, 2025 10:42 pm (Reykjavik time) (9 km NNW)
All earthquakes at Katla

Kula volcano (Turkey): magnitude 2.3 earthquake

A magnitude 2.3 earthquake occurred at the volcano 17 hours ago. The quake, which might be volcanic in origin, was located at a depth of 5.30 km depth at 16 km distance E from the volcano.
Earthquake details:
2.3 quake 17 km east of Kula, Manisa, Turkey, Oct 31, 2025 12:17 pm (Istanbul time) (16 km E)
All earthquakes at Kula

Milos volcano (Greece): 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 10.00 km depth at 12 km distance NW from the volcano.
Earthquake details:
2.8 quake 7.4 km west of Adamantas, Nomos Kykladon, South Aegean, Greece, Oct 31, 2025 11:33 pm (Athens time) (12 km NW)
All earthquakes at Milos

Nisyros volcano (Greece): magnitude 3.4 earthquake

A magnitude 3.4 earthquake occurred at the volcano 14 hours ago. The quake, which might be volcanic in origin, was located at a depth of 17.20 km depth at 10 km distance S from the volcano.
Earthquake details:
3.4 quake Aegean Sea, 12 km south of Nisi Nisyros Island, Dodecanese, South Aegean, Greece, Oct 31, 2025 01:38 pm (Athens time) (10 km S)
All earthquakes at Nisyros

Okataina (Tarawera) volcano (New Zealand): 6 earthquakes up to magnitude 3.3

6 earthquakes occurred near (under) the volcano during 7 hours, the last being recorded quake 11 hours ago. Hypocenter depths ranged between 6.90 and 3.40 km.
Earthquake details: (only 5 largest)
3.3 quake 20 km east of Rotorua, Bay of Plenty, New Zealand, Oct 31, 2025 08:31 pm (Auckland time) (3 km WSW)
2.3 quake 19 km east of Rotorua, Bay of Plenty, New Zealand, Oct 31, 2025 08:39 pm (Auckland time) (4 km WSW)
2.0 quake 20 km east of Rotorua, Bay of Plenty, New Zealand, Oct 31, 2025 10:11 pm (Auckland time) (3 km SW)
1.7 quake 20 km east of Rotorua, Bay of Plenty, New Zealand, Oct 31, 2025 10:04 pm (Auckland time) (3 km SW)
1.7 quake 18 km east of Rotorua, Bay of Plenty, New Zealand, Oct 31, 2025 10:03 pm (Auckland time) (5 km WSW)
All earthquakes at Okataina (Tarawera)

Olot Field volcano (Spain): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 16 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 0 km distance WNW from the volcano.
Earthquake details:
Reported quake or seismic-like event: 22 km south of Saint-Gaudens, Upper Garonne, Occitanie, France, Oct 31, 2025 11:03 am (GMT +1) (0 km WNW)
All earthquakes at Olot Field

Santa Clara volcano (Utah): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 22 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 18 km distance S from the volcano.
Earthquake details:
Unconfirmed earthquake or seismic-like event: 2 mi west of St. George, Washington County, Utah, United States, Oct 30, 2025 10:00 pm (GMT -6) (18 km S)
All earthquakes at Santa Clara

Sarik-Gajah volcano (Sumatra): 3 earthquakes up to magnitude 3.3

3 earthquakes occurred near (under) the volcano during 22 hours, the last being recorded quake 21 minutes ago. Hypocenter depths ranged between 10.00 and 10.00 km.
Earthquake details:
3.3 quake Kabupaten Pasaman, 33 km northwest of Bukittinggi, Indonesia, Nov 1, 2025 08:28 am (Jakarta time) (17 km S)
3.1 quake Kabupaten Pasaman, 35 km northwest of Bukittinggi, Indonesia, Oct 31, 2025 02:13 pm (Jakarta time) (14 km S)
2.6 quake Kabupaten Pasaman, 38 km northwest of Bukittinggi, Indonesia, Oct 31, 2025 10:46 am (Jakarta time) (12 km SSW)
All earthquakes at Sarik-Gajah

Terceira volcano (Azores): 2 earthquakes up to magnitude 2.3

2 earthquakes occurred near (under) the volcano during 12 hours, the last being recorded quake 1 hour 54 minutes ago. Hypocenter depths ranged between 4.40 and 1.10 km.
Earthquake details:
2.3 quake 15 km northwest of Angra do Heroismo, Azores, Portugal, Oct 31, 2025 10:30 am (Azores time) (3 km N)
2.1 quake 13 km northwest of Angra do Heroismo, Azores, Portugal, Oct 31, 2025 10:56 pm (Azores time) (2 km NE)
All earthquakes at Terceira
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