Volcano earthquake report for Sunday, 31 May 2026
World map showing volcanoes with shallow (less than 50 km) earthquakes within 20 km radius during the past 24 hours on 31 May 2026 Number in brackets indicate nr of quakes.

Quakes detected near: Bardarbunga (19 quakes between mag 0.0-1.9), Bibinoi (1 quake mag 3.3), Brennisteinsfjöll (5 quakes between mag 0.1-1.2), Campi Flegrei (Phlegrean Fields) (5 quakes between mag 0.1-3.0), Clear Lake (16 quakes between mag 0.2-1.9), Etna (1 quake mag 1.3)
Hekla (1 quake mag 1.5), Hrómundartindur (24 quakes between mag 0.0-2.8), Hualalai (1 quake mag 1.7), Hulubelu (2 quakes between mag 2.1-2.1), Katla (9 quakes between mag 0.7-2.0), Kawah Kamojang (1 quake mag 3.0), Kupreanof (2 quakes between mag 0.4-1.2), Lipari (1 quake mag 1.8), Loihi (1 quake mag 2.2), Matutum (1 quake mag 2.4), Methana (1 quake mag 2.1), Novarupta (1 quake mag 1.3), Poco Leok (5 quakes between mag 2.0-2.8), Prestahnukur (10 quakes between mag 0.9-1.8), Salton Buttes (4 quakes between mag 1.3-1.6), San Cristobal (1 quake mag 2.8), Santo Tomas (1 quake mag 3.7), Semisopochnoi (1 quake mag 2.0), Sousaki (2 quakes between mag 1.3-1.6), Tenerife (1 quake mag 1.0), Tjörnes Fracture Zone (3 quakes between mag 0.6-1.2), Torfajökull (2 quakes between mag 1.2-1.5), Vatnafjöll (1 quake mag 1.0), Whale Island (1 quake mag 2.0), White Island (2 quakes between mag 1.9-1.9) (updated 12h50)

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:



Bardarbunga volcano (Iceland): 19 earthquakes up to magnitude 1.9

Possible earthquake swarm: 19 earthquakes occurred near (under) the volcano during 19 hours, the last being recorded quake 19 minutes ago. Hypocenter depths ranged between 9.10 and 0.00 km.
Earthquake details: (only 5 largest)
1.9 quake 3.0 km SSE of Bárðarbunga May 30, 2026 10:56 pm (Universal Time) (2 km SE)
1.9 quake 6.7 km ENE of Bárðarbunga May 31, 2026 07:01 am (Universal Time) (8 km ENE)
1.5 quake 6.4 km ENE of Bárðarbunga May 31, 2026 10:00 am (Universal Time) (7 km ENE)
1.5 quake 6.7 km ESE of Bárðarbunga May 31, 2026 02:57 am (Universal Time) (7 km E)
1.4 quake 6.0 km E of Bárðarbunga May 31, 2026 03:22 am (Universal Time) (6 km E)
All earthquakes at Bardarbunga

Bibinoi volcano (Halmahera): magnitude 3.3 earthquake

A magnitude 3.3 earthquake occurred at the volcano 21 minutes ago. The quake, which might be volcanic in origin, was located at a depth of 3.00 km depth at 19 km distance W from the volcano.
Earthquake details:
3.3 quake Maluku Sea, 27 km southeast of Pulau Obit Island, North Maluku, Indonesia, May 31, 2026 09:29 pm (GMT +9) (19 km W)
All earthquakes at Bibinoi

Campi Flegrei (Phlegrean Fields) volcano (Italy): 5 earthquakes up to magnitude 3.0

5 earthquakes occurred near (under) the volcano during 8 hours, the last being recorded quake 1 hour 57 minutes ago. Hypocenter depths ranged between 10.00 and 0.03 km.
Earthquake details:
Reported seismic-like event (likely no quake): 0.2 km southwest of Naples, Napoli, Campania, Italy, May 31, 2026 05:44 am (GMT +2) (11 km ENE)
0.2 quake 2.6 km east of Pozzuoli, Napoli, Campania, Italy, May 31, 2026 04:42 am (GMT +2) (1 km NW)
0.1 quake Tyrrhenian Sea, 29 km east of Isola d'Ischia Island, Napoli, Campania, Italy, May 31, 2026 10:52 am (Universal Time) (11 km SE)
0.1 quake 12 km west of Naples, Napoli, Campania, Italy, May 31, 2026 09:14 am (Universal Time) (3 km NNW)
0.1 quake 1.4 km northwest of Bagnoli, Napoli, Campania, Italy, May 31, 2026 05:11 am (GMT +2) (2 km SE)
All earthquakes at Campi Flegrei (Phlegrean Fields)

Clear Lake volcano (California): 16 earthquakes up to magnitude 1.9

Possible earthquake swarm: 16 earthquakes occurred near (under) the volcano during 21 hours, the last being recorded quake 1 hour 11 minutes ago. Hypocenter depths ranged between 3.60 and 0.96 km.
Earthquake details: (only 5 largest)
1.9 quake 0.4 mi north of Lakeport, Lake County, California, United States, May 30, 2026 06:07 pm (GMT -7) (15 km NW)
1.7 quake Sonoma County, 14 mi southwest of Clearlake, Lake County, California, United States, May 31, 2026 01:00 am (GMT -7) (17 km SSW)
1.3 quake 25 mi north of Santa Rosa, Sonoma County, California, United States, May 30, 2026 12:53 pm (GMT -7) (19 km S)
1.1 quake 27 mi north of Santa Rosa, Sonoma County, California, United States, May 31, 2026 04:38 am (GMT -7) (16 km SSW)
1.1 quake 27 mi north of Santa Rosa, Sonoma County, California, United States, May 31, 2026 01:12 am (GMT -7) (17 km SSW)
All earthquakes at Clear Lake

Hrómundartindur volcano (Iceland): 24 earthquakes up to magnitude 2.8

Possible earthquake swarm: 24 earthquakes occurred near (under) the volcano during 18 hours, the last being recorded quake 57 minutes ago. Hypocenter depths ranged between 5.80 and 0.80 km.
Earthquake details: (only 5 largest)
2.8 quake South, 22 km east of Reykjavik, Capital Region, Iceland, May 31, 2026 06:55 am (Reykjavik time) (13 km W)
1.8 quake 2.1 km ENE of Litla_Kaffistofan May 31, 2026 06:56 am (Universal Time) (12 km W)
1.4 quake 2.6 km E of Litla_Kaffistofan May 31, 2026 07:01 am (Universal Time) (12 km W)
1.2 quake Iceland: 2.0 km ENE of Litla_Kaffistofan May 31, 2026 10:12 am (Reykjavik time) (13 km W)
1.2 quake 2.8 km E of Litla_Kaffistofan May 31, 2026 08:27 am (Universal Time) (12 km W)
All earthquakes at Hrómundartindur

Hulubelu volcano (Sumatra): 2 earthquakes up to magnitude 2.1

2 earthquakes occurred near (under) the volcano during 92 seconds, the last being recorded quake 15 hours ago. Hypocenter depths ranged between 20.00 and 6.00 km.
Earthquake details:
2.1 quake Kabupaten Tanggamus, 81 km west of Bandar Lampung, Indonesia, May 31, 2026 04:21 am (GMT +7) (5 km W)
2.1 quake Kabupaten Tanggamus, 77 km west of Bandar Lampung, Indonesia, May 31, 2026 04:19 am (GMT +7) (1 km N)
All earthquakes at Hulubelu

Kawah Kamojang volcano (West Java): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 24 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 19 km distance WNW from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): 16 km south of Bandung, Kota Bandung, Jawa Barat, Indonesia, May 30, 2026 01:05 pm (GMT +0) (19 km WNW)
All earthquakes at Kawah Kamojang

Loihi volcano (Hawai'i (Big Island)): magnitude 2.2 earthquake

A magnitude 2.2 earthquake occurred at the volcano 5 hours ago. The quake, which might be volcanic in origin, was located at a depth of 29.95 km depth at 17 km distance NW from the volcano.
Earthquake details:
2.2 quake North Pacific Ocean, 13 mi southeast of Pāhala, Hawaii County, Hawaii, United States, May 30, 2026 09:27 pm (GMT -10) (17 km NW)
All earthquakes at Loihi

Matutum volcano (Mindanao): magnitude 2.4 earthquake

A magnitude 2.4 earthquake occurred at the volcano 2 hours ago. The quake, which might be volcanic in origin, was located at a depth of 32.00 km depth at 2 km distance WNW from the volcano.
Earthquake details:
2.4 quake 12 km northeast of Tupi, Province of South Cotabato, Soccsksargen, Philippines, May 31, 2026 06:22 pm (GMT +8) (2 km WNW)
All earthquakes at Matutum

Methana volcano (Greece): magnitude 2.1 earthquake

A magnitude 2.1 earthquake occurred at the volcano 8 hours ago. The quake, which might be volcanic in origin, was located at a depth of 2.00 km depth at 9 km distance SE from the volcano.
Earthquake details:
2.1 quake Aegean Sea, 7.1 km northwest of Nisos Poros Island, Greece, May 31, 2026 08:18 am (GMT +3) (9 km SE)
All earthquakes at Methana

Poco Leok volcano (Flores): 5 earthquakes up to magnitude 2.8

5 earthquakes occurred near (under) the volcano during 5 hours, the last being recorded quake 8 hours ago. Hypocenter depths ranged between 6.00 and 1.00 km.
Earthquake details:
2.8 quake 7.7 km south of Ruteng, Kabupaten Manggarai, East Nusa Tenggara, Indonesia, May 31, 2026 07:38 am (GMT +8) (2 km W)
2.6 quake 5.5 km south of Ruteng, Kabupaten Manggarai, East Nusa Tenggara, Indonesia, May 31, 2026 07:33 am (GMT +8) (3 km NW)
2.5 quake 4.4 km south of Ruteng, Kabupaten Manggarai, East Nusa Tenggara, Indonesia, May 31, 2026 07:38 am (GMT +8) (4 km NW)
2.3 quake 2.2 km south of Ruteng, Kabupaten Manggarai, East Nusa Tenggara, Indonesia, May 31, 2026 07:31 am (GMT +8) (6 km NNW)
2.0 quake 3.6 km southwest of Ruteng, Kabupaten Manggarai, East Nusa Tenggara, Indonesia, May 31, 2026 12:29 pm (GMT +8) (6 km NW)
All earthquakes at Poco Leok

San Cristobal volcano (Nicaragua): magnitude 2.8 earthquake

A magnitude 2.8 earthquake occurred at the volcano 8 hours ago. The quake, which might be volcanic in origin, was located at a depth of 4.00 km depth at 5 km distance E from the volcano.
Earthquake details:
2.8 quake 20 km northeast of Chinandega, Departamento de Chinandega, Nicaragua, May 30, 2026 11:12 pm (GMT -6) (5 km E)
All earthquakes at San Cristobal

Santo Tomas volcano (Luzon Island): magnitude 3.7 earthquake

A magnitude 3.7 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 12 km distance SE from the volcano.
Earthquake details:
3.7 quake 19 km south of Baguio, Philippines, May 31, 2026 11:58 am (GMT +8) (12 km SE)
All earthquakes at Santo Tomas
https://www.volcanodiscovery.com/earthquakes-volcanoes/news/303782/Volcano-earthquake-report-for-Sunday-31-May-2026.html