Volcano earthquake report for Saturday, 31 May 2025

Quakes detected near: Abu (15 quakes between mag 0.1-2.0), Akyarlar (1 quake mag 1.1), Ambalatungan (1 quake mag 2.3), Arayat (1 quake mag 3.0), Barva (1 quake mag 1.6), Boset-Bericha (1 quake mag 3.0)
Cagua (1 quake mag 2.9), Calbuco (1 quake mag 3.0), Canlaon (1 quake mag 2.0), Clear Lake (36 quakes between mag 0.2-2.3), Coatepeque (1 quake mag 3.0), Cuernos de Negros (1 quake mag 3.0), Cuilapa-Barbarena (1 quake mag 3.0), Eldey (39 quakes between mag 0.1-2.1), Hrómundartindur (5 quakes between mag 0.3-2.7), Iraya (1 quake mag 3.4), Irazu (1 quake mag 1.5), Kilauea (1 quake mag 2.0), Klyuchevskoy (4 quakes between mag 0.9-1.6), Kolumbo (12 quakes between mag 1.2-2.6), La Palma (1 quake mag 1.5), Laguna Aramuaca (1 quake mag 2.5), Ljósufjöll (4 quakes between mag 0.9-1.5), Maunaloa (3 quakes between mag 1.4-2.0), Mount Rainier (2 quakes between mag 0.6-2.0), Numazawa (1 quake mag 3.0), Osore-yama (1 quake mag 1.1), Platanar (3 quakes between mag 1.3-2.0), Poas (2 quakes between mag 0.9-1.1), Prestahnukur (1 quake mag 1.1), San Diego (1 quake mag 1.1), Santorini (7 quakes between mag 0.7-2.1), Tenerife (2 quakes between mag 1.4-1.6), Terceira (1 quake mag 2.5), Tjörnes Fracture Zone (4 quakes between mag 1.0-1.1), To-shima (3 quakes between mag 1.0-2.4), Udina (1 quake mag 2.1), Ushkovsky (1 quake mag 1.7) (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:

Abu volcano (Honshu): 15 earthquakes up to magnitude 2.0

Possible earthquake swarm: 15 earthquakes occurred near (under) the volcano during 9 hours, the last being recorded quake 1 hour 56 minutes ago. Hypocenter depths ranged between 26.40 and 23.80 km.
Earthquake details: (only 5 largest)
2.0 quake 22 km northeast of Hagi, Yamaguchi, Japan, May 31, 2025 10:14 pm (GMT +9) (2 km NE)
1.3 quake 39 km north of Yamaguchi, Yamaguchi, Japan, Jun 1, 2025 06:54 am (GMT +9) (1 km NNE)
1.0 quake 39 km north of Yamaguchi, Yamaguchi, Japan, May 31, 2025 10:21 pm (GMT +9) (2 km NE)
0.9 quake 38 km north of Yamaguchi, Yamaguchi, Japan, May 31, 2025 10:48 pm (GMT +9) (2 km ENE)
0.8 quake 38 km north of Yamaguchi, Yamaguchi, Japan, Jun 1, 2025 01:02 am (GMT +9) (1 km ENE)
All earthquakes at Abu

Ambalatungan volcano (Luzon Island): magnitude 2.3 earthquake

A magnitude 2.3 earthquake occurred at the volcano 5 hours ago. The quake, which might be volcanic in origin, was located at a depth of 3.00 km depth at 13 km distance ESE from the volcano.
Earthquake details:
2.3 quake 36 km southwest of Tabuk, Kalinga, Cordillera Administrative Region, Philippines, Jun 1, 2025 03:14 am (GMT +8) (13 km ESE)
All earthquakes at Ambalatungan

Arayat volcano (Luzon Island): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 18 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 17 km distance W from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): 2.4 km north of Angeles City, Province of Pampanga, Central Luzon, Philippines, May 31, 2025 01:21 pm (GMT +8) (17 km W)
All earthquakes at Arayat

Boset-Bericha volcano (Ethiopia): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 11 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 0 km distance NNW from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): 23 km east of Nazret, Oromiya, Ethiopia, May 31, 2025 03:52 pm (GMT +3) (0 km NNW)
All earthquakes at Boset-Bericha

Cagua volcano (Luzon Island): magnitude 2.9 earthquake

A magnitude 2.9 earthquake occurred at the volcano 15 hours ago. The quake, which might be volcanic in origin, was located at a depth of 6.00 km depth at 19 km distance SE from the volcano.
Earthquake details:
2.9 quake Philippine Sea, 52 km south of Palaui Island, Philippines, May 31, 2025 04:37 pm (GMT +8) (19 km SE)
All earthquakes at Cagua

Calbuco volcano (Southern Chile and Argentina): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 19 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 9 km distance N from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): 36 km northeast of Puerto Montt, Llanquihue, Region de los Lagos, Chile, May 31, 2025 05:10 am (GMT +0) (9 km N)
All earthquakes at Calbuco

Clear Lake volcano (California): 36 earthquakes up to magnitude 2.3

Possible earthquake swarm: 36 earthquakes occurred near (under) the volcano during 22 hours, the last being recorded quake 2 hours ago. Hypocenter depths ranged between 10.31 and 0.70 km.
Earthquake details: (only 5 largest)
2.3 quake 12 mi southwest of Clearlake, Lake County, California, United States, May 30, 2025 06:40 pm (GMT -7) (16 km S)
1.6 quake Sonoma County, 14 mi southwest of Clearlake, Lake County, California, United States, May 31, 2025 09:07 am (GMT -7) (16 km SSW)
1.5 quake 6 km WNW of Cobb, CA, May 30, 2025 06:41 pm (GMT -7) (15 km S)
1.3 quake Lake County, 26 mi north of Santa Rosa, Sonoma County, California, United States, May 31, 2025 07:46 am (GMT -7) (18 km S)
1.3 quake 10 km NNW of the Geysers, CA, May 31, 2025 08:46 am (GMT -7) (15 km SSW)
All earthquakes at Clear Lake

Coatepeque volcano (El Salvador): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 9 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 14 km distance ESE from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): 30 km northwest of San Salvador, Departamento de San Salvador, El Salvador, May 31, 2025 09:13 am (GMT -6) (14 km ESE)
All earthquakes at Coatepeque

Cuernos de Negros volcano (Central Philippines): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 18 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 16 km distance ENE from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): 1 km southwest of Dumaguete, Philippines, May 31, 2025 02:16 pm (GMT +8) (16 km ENE)
All earthquakes at Cuernos de Negros

Cuilapa-Barbarena volcano (Guatemala): 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 1 km distance NNW from the volcano.
Earthquake details:
Reported quake or seismic-like event: 9.3 km west of Guatemala City, Departamento de Guatemala, Guatemala, May 31, 2025 02:40 am (GMT -6) (1 km NNW)
All earthquakes at Cuilapa-Barbarena

Eldey volcano (Iceland): 39 earthquakes up to magnitude 2.1

Possible earthquake swarm: 39 earthquakes occurred near (under) the volcano during 17 hours, the last being recorded quake 7 hours ago. Hypocenter depths ranged between 12.30 and 1.10 km.
Earthquake details: (only 5 largest)
2.1 quake 4.4 km NNE of Geirfuglasker May 31, 2025 12:22 am (Universal Time) (8 km W)
1.9 quake 2.9 km NW of Eldey May 31, 2025 12:38 am (Universal Time) (3 km N)
1.8 quake 2.9 km NW of Eldey May 31, 2025 01:38 am (Universal Time) (3 km N)
1.8 quake 2.5 km NW of Eldey May 31, 2025 01:44 am (Universal Time) (3 km N)
1.7 quake Iceland: 6.0 km W of Eldeyjardrangur May 31, 2025 04:57 pm (Reykjavik time) (5 km W)
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.

Hrómundartindur volcano (Iceland): 5 earthquakes up to magnitude 2.7

5 earthquakes occurred near (under) the volcano during 4 hours, the last being recorded quake 12 hours ago. Hypocenter depths ranged between 8.40 and 3.70 km.
Earthquake details:
2.7 quake 3.6 km SW of Hrómundartindi May 31, 2025 07:46 am (Universal Time) (4 km SW)
1.0 quake Iceland: 3.7 km S of Hrómundartindi May 31, 2025 08:00 am (Reykjavik time) (3 km S)
0.4 quake Iceland: 5.7 km SSE of Hveragerði May 31, 2025 09:27 am (Reykjavik time) (14 km S)
0.3 quake Iceland: 2.1 km NNE of Hellisheiðarvirkjun May 31, 2025 11:56 am (Reykjavik time) (9 km WSW)
0.3 quake 3.7 km SW of Hrómundartindi May 31, 2025 07:48 am (Universal Time) (3 km SW)
All earthquakes at Hrómundartindur

Iraya volcano (North of Luzon): magnitude 3.4 earthquake

A magnitude 3.4 earthquake occurred at the volcano 1 hour 2 minutes ago. The quake, which might be volcanic in origin, was located at a depth of 13.00 km depth at 16 km distance ENE from the volcano.
Earthquake details:
3.4 quake Philippine Sea, 23 km northeast of Batan Island, Philippines, Jun 1, 2025 06:48 am (GMT +8) (16 km ENE)
All earthquakes at Iraya

Kolumbo volcano (Greece): 12 earthquakes up to magnitude 2.6

Possible earthquake swarm: 12 earthquakes occurred near (under) the volcano during 22 hours, the last being recorded quake 1 hour 34 minutes ago. Hypocenter depths ranged between 23.72 and 5.00 km.
Earthquake details: (only 5 largest)
2.6 quake Aegean Sea, 25 km northeast of Santorini Island, Greece, May 31, 2025 06:18 pm (GMT +3) (14 km NE)
2.1 quake Aegean Sea, 25 km northeast of Santorini Island, Greece, May 31, 2025 06:18 pm (GMT +3) (14 km NE)
1.8 quake Aegean Sea, 25 km northeast of Santorini Island, Greece, Jun 1, 2025 01:15 am (GMT +3) (15 km ENE)
1.8 quake Santorini Isl. - S. Greece Jun 1, 2025 01:06 am (GMT +3) (12 km NE)
1.7 quake Aegean Sea, 27 km northwest of Nisi Anafi Island, Greece, May 31, 2025 08:34 pm (GMT +3) (17 km ENE)
All earthquakes at Kolumbo

Laguna Aramuaca volcano (El Salvador): magnitude 2.5 earthquake

A magnitude 2.5 earthquake occurred at the volcano 17 hours ago. The quake, which might be volcanic in origin, was located at a depth of 7.00 km depth at 18 km distance ESE from the volcano.
Earthquake details:
2.5 quake 13 km west of La Union, Departamento de La Union, El Salvador, May 31, 2025 12:20 am (GMT -6) (18 km ESE)
All earthquakes at Laguna Aramuaca

Numazawa volcano (Honshu): 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 10.00 km depth at 4 km distance SSW from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): 37 km southwest of Kitakata, Fukushima, Japan, May 31, 2025 12:26 pm (GMT +9) (4 km SSW)
All earthquakes at Numazawa

Santorini volcano (Greece): 7 earthquakes up to magnitude 2.1

7 earthquakes occurred near (under) the volcano during 18 hours, the last being recorded quake 1 hour 27 minutes ago. Hypocenter depths ranged between 24.81 and 5.00 km.
Earthquake details: (only 5 largest)
2.1 quake Aegean Sea, 20 km southeast of Nisi Sikinos Island, Greece, May 31, 2025 08:29 am (GMT +3) (19 km NW)
1.9 quake Aegean Sea, 6.5 km west of Santorini Island, Greece, May 31, 2025 07:58 pm (GMT +3) (1 km NW)
1.8 quake 3.1 km southwest of Fira, Nomos Kykladon, South Aegean, Greece, May 31, 2025 05:53 pm (GMT +3) (1 km E)
1.8 quake Aegean Sea, 12 km northwest of Santorini Island, Greece, May 31, 2025 07:15 am (GMT +3) (9 km NNW)
1.7 quake Aegean Sea, 6.3 km west of Santorini Island, Greece, May 31, 2025 04:57 pm (GMT +3) (2 km NNW)
All earthquakes at Santorini

Terceira volcano (Azores): magnitude 2.5 earthquake

A magnitude 2.5 earthquake occurred at the volcano 16 hours ago. The quake, which might be volcanic in origin, was located at a depth of 7.70 km depth at 11 km distance E from the volcano.
Earthquake details:
2.5 quake 8.8 km north of Angra do Heroismo, Azores, Portugal, May 31, 2025 07:33 am (Universal Time) (11 km E)
All earthquakes at Terceira

To-shima volcano (Izu Islands): 3 earthquakes up to magnitude 2.4

3 earthquakes occurred near (under) the volcano during 16 hours, the last being recorded quake 8 hours ago. Hypocenter depths ranged between 14.90 and 12.10 km.
Earthquake details:
2.4 quake North Pacific Ocean, Tokyo, 46 km east of Shimoda, Shizuoka, Japan, May 31, 2025 09:11 am (GMT +9) (13 km ENE)
1.1 quake North Pacific Ocean, Tokyo, 45 km east of Shimoda, Shizuoka, Japan, May 31, 2025 10:21 pm (GMT +9) (13 km ENE)
1.0 quake North Pacific Ocean, Tokyo, 45 km east of Shimoda, Shizuoka, Japan, Jun 1, 2025 01:18 am (GMT +9) (13 km ENE)
All earthquakes at To-shima

Udina volcano (Central Kamchatka Depression): magnitude 2.1 earthquake

A magnitude 2.1 earthquake occurred at the volcano 15 hours ago. The quake, which might be volcanic in origin, was located at a depth of 14.89 km depth at 13 km distance SW from the volcano.
Earthquake details:
2.1 quake Ust'-Kamchatskiy Rayon, 47 km east of Atlasovo, Kamchatka, Russia, May 31, 2025 08:34 pm (Kamchatka time) (13 km SW)
All earthquakes at Udina
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