Volcano earthquake report for Friday, 31 Jul 2026

Quakes detected near: Agua (1 quake mag 1.2), Akyarlar (1 quake mag 1.6), Atka (1 quake mag 1.1), Balut (3 quakes between mag 1.9-3.9), Bibinoi (1 quake mag 2.8), Campi Flegrei (Phlegrean Fields) (158 quakes between mag 0.1-4.5)
Chiginagak (1 quake mag 1.4), Clear Lake (15 quakes between mag 0.2-1.7), Cosigüina (1 quake mag 2.2), Coso (2 quakes between mag 0.7-1.1), Denison (1 quake mag 1.1), El Hierro (1 quake mag 2.4), Eldey (17 quakes between mag 0.2-1.1), Etna (1 quake mag 1.4), Gareloi (4 quakes between mag 0.7-1.2), Grímsvötn (2 quakes between mag 0.3-1.0), Hulubelu (4 quakes between mag 2.1-2.7), Iliamna (1 quake mag 1.4), Iraya (1 quake mag 2.4), Katla (4 quakes between mag 0.7-1.7), Katmai (2 quakes between mag 1.1-1.5), Kilauea (1 quake mag 1.7), Krísuvík (2 quakes between mag 0.0-1.0), La Palma (1 quake mag 1.8), Lavic Lake (1 quake mag 1.2), Ljósufjöll (2 quakes between mag 0.0-1.4), Loihi (1 quake mag 1.8), Loki-Fögrufjöll volcano (4 quakes between mag 0.6-2.2), Mahagnao (1 quake mag 3.0), Papandayan (1 quake mag 2.2), Peuet Sague (1 quake mag 2.2), Reporoa (1 quake mag 1.5), San Diego (1 quake mag 3.0), Sinabung (1 quake mag 2.1), Stepovak Bay 4 (1 quake mag 1.1), Takahara (1 quake mag 2.6), Tjörnes Fracture Zone (2 quakes between mag 0.5-1.2), Toroeng Prong (1 quake mag 2.5), Turrialba (1 quake mag 2.1), White Island (4 quakes between mag 2.4-2.7), Yellowstone (9 quakes between mag 0.1-1.5) (updated 22h50)

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:

Balut volcano (Mindanao): 3 earthquakes up to magnitude 3.9

3 earthquakes occurred near (under) the volcano during 19 hours, the last being recorded quake 2 hours ago. Hypocenter depths ranged between 38.00 and 11.00 km.
Earthquake details:
3.9 quake 14 km south of Sarangani, Davao Occidental, Davao, Philippines, Jul 31, 2026 09:43 am (Manila time) (19 km SE)
2.6 quake Celebes Sea, 26 km west of Sarangani Island, Philippines, Aug 1, 2026 03:32 am (GMT +8) (16 km WNW)
1.9 quake Province of Davao del Sur, 8.6 km west of Sarangani, Philippines, Aug 1, 2026 04:33 am (GMT +8) (3 km SE)
All earthquakes at Balut

Bibinoi volcano (Halmahera): magnitude 2.8 earthquake

A magnitude 2.8 earthquake occurred at the volcano 9 hours ago. The quake, which might be volcanic in origin, was located at a depth of 9.00 km depth at 9 km distance W from the volcano.
Earthquake details:
2.8 quake Maluku Sea, 25 km southeast of Labuha, Indonesia, Jul 31, 2026 10:43 pm (GMT +9) (9 km W)
All earthquakes at Bibinoi

Campi Flegrei (Phlegrean Fields) volcano (Italy): 158 earthquakes up to magnitude 4.5

Possible earthquake swarm: 158 earthquakes occurred near (under) the volcano during 21 hours, the last being recorded quake 23 minutes ago. Hypocenter depths ranged between 5.97 and 0.02 km.
Earthquake details: (only 5 largest)
4.5 quake 11 km northwest of Naples, Napoli, Campania, Italy, Jul 31, 2026 06:46 pm (Rome time) (7 km N)
3.8 quake 14 km west of Naples, Napoli, Campania, Italy, Jul 31, 2026 10:00 pm (Rome time) (3 km W)
3.1 quake 10.3 km west of Naples, Napoli, Campania, Italy, Jul 31, 2026 11:35 pm (GMT +2) (1 km ESE)
2.9 quake Tyrrhenian Sea, 20 km northeast of Isola d'Ischia Island, Italy, Jul 31, 2026 08:57 pm (GMT +2) (3 km W)
2.7 quake 4.6 km southeast of Pozzuoli, Napoli, Campania, Italy, Jul 31, 2026 11:34 pm (GMT +2) (1 km SSE)
All earthquakes at Campi Flegrei (Phlegrean Fields)

Clear Lake volcano (California): 15 earthquakes up to magnitude 1.7

Possible earthquake swarm: 15 earthquakes occurred near (under) the volcano during 19 hours, the last being recorded quake 4 hours ago. Hypocenter depths ranged between 4.07 and 1.60 km.
Earthquake details: (only 5 largest)
1.7 quake Sonoma County, 14 mi southwest of Clearlake, Lake County, California, United States, Jul 31, 2026 08:24 am (GMT -7) (19 km S)
1.1 quake Lake County, 28 mi north of Santa Rosa, Sonoma County, California, United States, Jul 31, 2026 09:16 am (GMT -7) (15 km S)
1.1 quake 27 mi north of Santa Rosa, Sonoma County, California, United States, Jul 30, 2026 05:31 pm (GMT -7) (17 km SSW)
1.0 quake Lake County, 27 mi north of Santa Rosa, Sonoma County, California, United States, Jul 31, 2026 11:25 am (GMT -7) (16 km S)
1.0 quake 25 mi north of Santa Rosa, Sonoma County, California, United States, Jul 31, 2026 05:54 am (GMT -7) (19 km S)
All earthquakes at Clear Lake

Cosigüina volcano (Nicaragua): magnitude 2.2 earthquake

A magnitude 2.2 earthquake occurred at the volcano 23 hours ago. The quake, which might be volcanic in origin, was located at a depth of 7.00 km depth at 14 km distance ESE from the volcano.
Earthquake details:
2.2 quake 48 km northwest of Chinandega, Departamento de Chinandega, Nicaragua, Jul 30, 2026 05:32 pm (GMT -6) (14 km ESE)
All earthquakes at Cosigüina

El Hierro volcano (Canary Islands): magnitude 2.4 earthquake

A magnitude 2.4 earthquake occurred at the volcano 10 hours ago. The quake, which might be volcanic in origin, was located at a depth of 32.50 km depth at 19 km distance W from the volcano.
Earthquake details:
2.4 quake 20 km southwest of Frontera, Santa Cruz de Tenerife, Canary Islands, Spain, Jul 31, 2026 02:16 pm (GMT +1) (19 km W)
All earthquakes at El Hierro

Eldey volcano (Iceland): 17 earthquakes up to magnitude 1.1

Possible earthquake swarm: 17 earthquakes occurred near (under) the volcano during 23 hours, the last being recorded quake 38 minutes ago. Hypocenter depths ranged between 10.40 and 0.00 km.
Earthquake details: (only 5 largest)
1.1 quake 6.4 km W of Reykjanestá Jul 30, 2026 11:49 pm (Universal Time) (11 km NE)
0.9 quake 4.6 km SSW of Reykjanestá Jul 31, 2026 10:49 am (Universal Time) (14 km ENE)
0.9 quake 6.0 km SW of Reykjanestá Jul 31, 2026 10:18 am (Universal Time) (11 km ENE)
0.9 quake 2.2 km NNE of Eldey Jul 31, 2026 03:58 am (Universal Time) (4 km NE)
0.7 quake 4.5 km SSW of Reykjanestá Jul 31, 2026 06:43 pm (Universal Time) (13 km ENE)
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.

Hulubelu volcano (Sumatra): 4 earthquakes up to magnitude 2.7

4 earthquakes occurred near (under) the volcano during 4 hours, the last being recorded quake 11 hours ago. Hypocenter depths ranged between 10.00 and 3.00 km.
Earthquake details:
2.7 quake Kabupaten Tanggamus, 65 km west of Bandar Lampung, Indonesia, Jul 31, 2026 07:12 pm (GMT +7) (15 km SE)
2.5 quake Kabupaten Tanggamus, 73 km west of Bandar Lampung, Indonesia, Jul 31, 2026 03:27 pm (GMT +7) (6 km NE)
2.3 quake Kabupaten Tanggamus, 64 km west of Bandar Lampung, Indonesia, Jul 31, 2026 05:29 pm (GMT +7) (13 km E)
2.1 quake Kabupaten Tanggamus, 66 km southwest of Kotabumi, Indonesia, Jul 31, 2026 03:55 pm (GMT +7) (1 km WSW)
All earthquakes at Hulubelu

Iraya volcano (North of Luzon): magnitude 2.4 earthquake

A magnitude 2.4 earthquake occurred at the volcano 20 hours ago. The quake, which might be volcanic in origin, was located at a depth of 29.00 km depth at 8 km distance W from the volcano.
Earthquake details:
2.4 quake South China Sea, 5.3 km northwest of Batan Island, Philippines, Jul 31, 2026 10:45 am (GMT +8) (8 km W)
All earthquakes at Iraya

Loki-Fögrufjöll volcano volcano (Iceland): 4 earthquakes up to magnitude 2.2

4 earthquakes occurred near (under) the volcano during 10 hours, the last being recorded quake 21 minutes ago. Hypocenter depths ranged between 5.10 and 0.90 km.
Earthquake details:
2.2 quake Iceland: 11.0 km ESE of Hamarinn Jul 31, 2026 12:56 pm (Reykjavik time) (10 km E)
1.6 quake Iceland: 5.7 km SE of Hamarinn Jul 31, 2026 10:29 pm (Reykjavik time) (5 km ESE)
0.9 quake Iceland: 7.8 km SE of Hamarinn Jul 31, 2026 10:05 pm (Reykjavik time) (7 km SE)
0.6 quake 7.3 km SE of Hamarinn Jul 31, 2026 02:31 pm (Universal Time) (6 km SE)
All earthquakes at Loki-Fögrufjöll volcano

Mahagnao volcano (Central Philippines): 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 8 km distance E from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): 9.5 km southeast of Burauen, Province of Leyte, Eastern Visayas, Philippines, Jul 31, 2026 07:54 pm (GMT +8) (8 km E)
All earthquakes at Mahagnao

Papandayan volcano (West Java): magnitude 2.2 earthquake

A magnitude 2.2 earthquake occurred at the volcano 13 hours ago. The quake, which might be volcanic in origin, was located at a depth of 4.00 km depth at 15 km distance NW from the volcano.
Earthquake details:
2.2 quake 22 km east of Banjar, Kabupaten Bandung, Jawa Barat, Indonesia, Jul 31, 2026 04:55 pm (GMT +7) (15 km NW)
All earthquakes at Papandayan

Peuet Sague volcano (Sumatra): magnitude 2.2 earthquake

A magnitude 2.2 earthquake occurred at the volcano 14 hours ago. The quake, which might be volcanic in origin, was located at a depth of 14.00 km depth at 19 km distance SW from the volcano.
Earthquake details:
2.2 quake Kabupaten Pidie, 47 km south of Reuleuet, Indonesia, Jul 31, 2026 03:22 pm (GMT +7) (19 km SW)
All earthquakes at Peuet Sague

San Diego volcano (El Salvador): 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 9 km distance NNE from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): 1.4 km east of Metapan, Departamento de Santa Ana, El Salvador, Jul 30, 2026 11:18 pm (GMT -6) (9 km NNE)
All earthquakes at San Diego

Sinabung volcano (Sumatra): magnitude 2.1 earthquake

A magnitude 2.1 earthquake occurred at the volcano 9 hours ago. The quake, which might be volcanic in origin, was located at a depth of 16.00 km depth at 1 km distance NNW from the volcano.
Earthquake details:
2.1 quake 14 km northwest of Kabanjahe, Kabupaten Karo, North Sumatra, Indonesia, Jul 31, 2026 08:23 pm (GMT +7) (1 km NNW)
All earthquakes at Sinabung

Takahara volcano (Honshu): magnitude 2.6 earthquake

A magnitude 2.6 earthquake occurred at the volcano 4 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.20 km depth at 3 km distance E from the volcano.
Earthquake details:
2.6 quake 20 km west of Otawara, Tochigi, Japan, Aug 1, 2026 03:45 am (GMT +9) (3 km E)
All earthquakes at Takahara

Toroeng Prong volcano (Vietnam): 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 8.10 km depth at 16 km distance NE from the volcano.
Earthquake details:
2.5 quake 66 km north of Kon Tum, Kon Tum, Vietnam, Jul 31, 2026 10:27 am (GMT +7) (16 km NE)
All earthquakes at Toroeng Prong

Turrialba volcano (Costa Rica): magnitude 2.1 earthquake

A magnitude 2.1 earthquake occurred at the volcano 18 hours ago. The quake, which might be volcanic in origin, was located at a depth of 19.00 km depth at 19 km distance E from the volcano.
Earthquake details:
2.1 quake 10.6 km west of Siquirres, Provincia de Limon, Costa Rica, Jul 30, 2026 10:33 pm (Costa_Rica time) (19 km E)
All earthquakes at Turrialba

Unnamed 52.92°N/158.52°E volcano (Southern Kamchatka): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 23 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 18 km distance NNE from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): 2.2 km west of Petropavlovsk-Kamchatskiy, Kamchatka, Russia, Jul 31, 2026 11:47 am (GMT +12) (18 km NNE)
All earthquakes at Unnamed 52.92°N/158.52°E

White Island volcano (New Zealand): 4 earthquakes up to magnitude 2.7

4 earthquakes occurred near (under) the volcano during 15 hours, the last being recorded quake 8 hours ago. Hypocenter depths ranged between 5.00 and 5.00 km.
Earthquake details:
2.7 quake South Pacific Ocean, 55 km north of Whakatane, Bay of Plenty, New Zealand, Aug 1, 2026 01:10 am (GMT +12) (10 km WNW)
2.7 quake South Pacific Ocean, 52 km north of Whakatane, Bay of Plenty, New Zealand, Jul 31, 2026 11:33 am (GMT +12) (8 km WNW)
2.6 quake South Pacific Ocean, 48 km north of Whakatane, Bay of Plenty, New Zealand, Jul 31, 2026 08:42 pm (GMT +12) (9 km W)
2.4 quake South Pacific Ocean, 52 km north of Whakatane, Bay of Plenty, New Zealand, Aug 1, 2026 02:37 am (GMT +12) (9 km WNW)
All earthquakes at White Island
https://www.volcanodiscovery.com/earthquakes-volcanoes/news/322375/Volcano-earthquake-report-for-Friday-31-Jul-2026.html