Volcano earthquake report for Saturday, 6 Dec 2025
World map showing volcanoes with shallow (less than 50 km) earthquakes within 20 km radius during the past 24 hours on 6 Dec 2025 Number in brackets indicate nr of quakes.

Quakes detected near: Adatara (1 quake mag 3.0), Akita-Yake-yama (2 quakes between mag 0.5-1.2), Akuseki-jima (2 quakes between mag 1.4-1.8), Aso (22 quakes between mag 0.1-1.3), Bardarbunga (2 quakes between mag 0.8-1.2), Bratan (1 quake mag 2.3)
Brennisteinsfjöll (2 quakes between mag 0.1-1.9), Clear Lake (39 quakes between mag 0.3-1.4), Coso (3 quakes between mag 0.8-1.4), El Chichón (3 quakes between mag 2.5-2.9), Eldey (3 quakes between mag 1.0-1.6), Grímsvötn (1 quake mag 1.2), Isla San Luis (1 quake mag 3.7), Kilauea (3 quakes between mag 1.7-1.8), Kirishima (10 quakes between mag 0.1-1.9), Kolumbo (4 quakes between mag 1.3-1.8), Lavic Lake (1 quake mag 1.0), Loihi (1 quake mag 1.9), Loki-Fögrufjöll volcano (7 quakes between mag 0.8-3.4), Mammoth Mountain (1 quake mag 1.6), Maunaloa (1 quake mag 1.8), Methana (1 quake mag 2.1), Nantai (24 quakes between mag 0.1-1.9), Nasu (1 quake mag 3.0), Papandayan (1 quake mag 2.5), Piton de la Fournaise (9 quakes between mag 0.3-1.4), Prestahnukur (1 quake mag 1.9), Ragang (1 quake mag 1.7), Sakurajima (2 quakes between mag 0.6-1.2), San Diego (1 quake mag 1.5), Sousaki (1 quake mag 1.5), Spurr (1 quake mag 1.3), Taupo (1 quake mag 1.5), Tjörnes Fracture Zone (1 quake mag 1.1), Tungurahua (1 quake mag 3.7), Zao (2 quakes between mag 0.7-3.0) (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:



Adatara volcano (Honshu): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 5 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 2 km distance N from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): 30 km north of Koriyama, Fukushima, Japan, Dec 7, 2025 04:19 am (GMT +9) (2 km N)
All earthquakes at Adatara

Aso volcano (Kyushu): 22 earthquakes up to magnitude 1.3

Possible earthquake swarm: 22 earthquakes occurred near (under) the volcano during 21 hours, the last being recorded quake 3 hours ago. Hypocenter depths ranged between 12.60 and 2.80 km.
Earthquake details: (only 5 largest)
1.3 quake 6 km northeast of Aso, Kumamoto, Japan, Dec 6, 2025 06:20 pm (GMT +9) (12 km N)
0.8 quake 6.4 km north of Aso, Kumamoto, Japan, Dec 6, 2025 08:53 am (GMT +9) (12 km N)
0.7 quake 45 km northeast of Kumamoto, Kumamoto, Japan, Dec 6, 2025 09:43 am (GMT +9) (12 km N)
0.7 quake 43 km northeast of Kumamoto, Kumamoto, Japan, Dec 6, 2025 01:18 pm (GMT +9) (11 km N)
0.7 quake 44 km northeast of Kumamoto, Kumamoto, Japan, Dec 7, 2025 05:47 am (GMT +9) (13 km N)
All earthquakes at Aso

Bratan volcano (Bali): magnitude 2.3 earthquake

A magnitude 2.3 earthquake occurred at the volcano 15 hours ago. The quake, which might be volcanic in origin, was located at a depth of 14.00 km depth at 15 km distance NE from the volcano.
Earthquake details:
2.3 quake 16 km southeast of Singaraja, Kabupaten Buleleng, Provinsi Bali, Indonesia, Dec 6, 2025 04:38 pm (GMT +8) (15 km NE)
All earthquakes at Bratan

Clear Lake volcano (California): 39 earthquakes up to magnitude 1.4

Possible earthquake swarm: 39 earthquakes occurred near (under) the volcano during 23 hours, the last being recorded quake 25 minutes ago. Hypocenter depths ranged between 4.23 and 0.01 km.
Earthquake details: (only 5 largest)
1.4 quake 27 mi north of Santa Rosa, Sonoma County, California, United States, Dec 5, 2025 04:07 pm (GMT -8) (17 km SSW)
1.3 quake 26 mi north of Santa Rosa, Sonoma County, California, United States, Dec 6, 2025 02:53 am (GMT -8) (18 km SSW)
1.3 quake 28 mi north of Santa Rosa, Sonoma County, California, United States, Dec 6, 2025 01:54 pm (GMT -8) (17 km SSW)
1.3 quake 26 mi north of Santa Rosa, Sonoma County, California, United States, Dec 5, 2025 09:54 pm (GMT -8) (18 km S)
1.2 quake 28 mi north of Santa Rosa, Sonoma County, California, United States, Dec 5, 2025 04:50 pm (GMT -8) (16 km SSW)
All earthquakes at Clear Lake

El Chichón volcano (Southern Mexico): 3 earthquakes up to magnitude 2.9

3 earthquakes occurred near (under) the volcano during 9 hours, the last being recorded quake 14 hours ago. Hypocenter depths ranged between 3.80 and 2.20 km.
Earthquake details:
2.9 quake Estado de Chiapas, 38 km southwest of Teapa, Estado de Tabasco, Mexico, Dec 6, 2025 03:39 am (GMT -6) (1 km SW)
2.5 quake Estado de Chiapas, 36 km southwest of Teapa, Estado de Tabasco, Mexico, Dec 5, 2025 06:28 pm (GMT -6) (2 km NNW)
2.5 quake Estado de Chiapas, 37 km southwest of Teapa, Estado de Tabasco, Mexico, Dec 6, 2025 01:39 am (GMT -6) (1 km W)
All earthquakes at El Chichón

Isla San Luis volcano (Baja California, NW Mexico & Mexican Islands): magnitude 3.7 earthquake

A magnitude 3.7 earthquake occurred at the volcano 14 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 17 km distance NNW from the volcano.
Earthquake details:
3.7 quake 108 km south of San Felipe, Estado de Baja California, Mexico, Dec 6, 2025 01:59 am (Tijuana time) (17 km NNW)
All earthquakes at Isla San Luis

Loki-Fögrufjöll volcano volcano (Iceland): 7 earthquakes up to magnitude 3.4

7 earthquakes occurred near (under) the volcano during 3 hours, the last being recorded quake 11 hours ago. Hypocenter depths ranged between 12.60 and 0.60 km.
Earthquake details: (only 5 largest)
3.4 quake South, 205 km east of Reykjavik, Capital Region, Iceland, Dec 6, 2025 10:13 am (Reykjavik time) (5 km ESE)
3.1 quake South, 204 km east of Reykjavik, Capital Region, Iceland, Dec 6, 2025 10:10 am (Reykjavik time) (3 km ESE)
1.8 quake 3.9 km SE of Hamarinn Dec 6, 2025 10:15 am (Universal Time) (3 km ESE)
1.6 quake 3.1 km SE of Hamarinn Dec 6, 2025 12:25 pm (Universal Time) (2 km SE)
1.5 quake 3.7 km SE of Hamarinn Dec 6, 2025 11:00 am (Universal Time) (3 km SE)
All earthquakes at Loki-Fögrufjöll volcano

Methana volcano (Greece): magnitude 2.1 earthquake

A magnitude 2.1 earthquake occurred at the volcano 7 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 19 km distance ESE from the volcano.
Earthquake details:
2.1 quake Aegean Sea, 7.4 km northeast of Nisos Poros Island, Greece, Dec 6, 2025 06:59 pm (GMT +2) (19 km ESE)
All earthquakes at Methana

Nantai volcano (Honshu): 24 earthquakes up to magnitude 1.9

Possible earthquake swarm: 24 earthquakes occurred near (under) the volcano during 14 hours, the last being recorded quake 3 hours ago. Hypocenter depths ranged between 11.30 and 0.80 km.
Earthquake details: (only 5 largest)
1.9 quake 24 km southwest of Nikko, Tochigi, Japan, Dec 6, 2025 09:54 pm (GMT +9) (17 km SSW)
1.2 quake 43 km west of Utsunomiya, Tochigi, Japan, Dec 6, 2025 10:56 pm (GMT +9) (17 km SSW)
1.2 quake Japan: Tochigi Gunma Border Dec 6, 2025 10:15 pm (GMT +9) (17 km SSW)
1.1 quake Japan: Tochigi Gunma Border Dec 6, 2025 10:00 pm (GMT +9) (17 km SSW)
1.0 quake Japan: Tochigi Gunma Border Dec 6, 2025 09:51 pm (GMT +9) (17 km SSW)
All earthquakes at Nantai

Nasu volcano (Honshu): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 21 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 6 km distance NW from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): 24 km northwest of Nasushiobara, Tochigi, Japan, Dec 6, 2025 12:19 pm (GMT +9) (6 km NW)
All earthquakes at Nasu

Papandayan volcano (West Java): magnitude 2.5 earthquake

A magnitude 2.5 earthquake occurred at the volcano 19 hours ago. The quake, which might be volcanic in origin, was located at a depth of 5.00 km depth at 15 km distance WNW from the volcano.
Earthquake details:
2.5 quake 21 km east of Banjar, Kabupaten Bandung, Jawa Barat, Indonesia, Dec 6, 2025 11:49 am (GMT +7) (15 km WNW)
All earthquakes at Papandayan

Tungurahua volcano (Ecuador): magnitude 3.7 earthquake

A magnitude 3.7 earthquake occurred at the volcano 55 minutes ago. The quake, which might be volcanic in origin, was located at a depth of 20.00 km depth at 18 km distance NNW from the volcano.
Earthquake details:
3.7 quake 13 km southeast of Ambato, Tungurahua, Ecuador, Dec 6, 2025 05:54 pm (Guayaquil time) (18 km NNW)
All earthquakes at Tungurahua

Zao volcano (Honshu): 2 earthquakes up to magnitude 3.0

2 earthquakes occurred near (under) the volcano during 4 hours, the last being recorded quake 19 hours ago. Hypocenter depths ranged between 10.00 and 3.80 km.
Earthquake details:
Reported seismic-like event (likely no quake): 12 km southeast of Yamagata, Yamagata, Japan, Dec 6, 2025 01:45 pm (GMT +9) (3 km NE)
0.7 quake 5.1 km southeast of Kaminoyama, Yamagata, Japan, Dec 6, 2025 10:13 am (GMT +9) (10 km W)
All earthquakes at Zao
https://www.volcanodiscovery.com/earthquakes-volcanoes/news/288779/Volcano-earthquake-report-for-Saturday-6-Dec-2025.html