Volcano earthquake report for Sunday, 4 October 2026
World map showing volcanoes with shallow (less than 50 km) earthquakes within 20 km radius during the past 24 hours on 4 Oct 2026 Number in brackets indicate nr of quakes.

Quakes detected near: Askja (2 quakes between mag 0.8-1.4), Balut (5 quakes between mag 1.8-2.7), Bardarbunga (3 quakes between mag 0.8-1.5), Brennisteinsfjöll (15 quakes between mag 0.0-3.3), Clear Lake (23 quakes between mag 0.2-1.8), Cuilapa-Barbarena (2 quakes between mag 1.1-1.1)
Eyafjallajökull (1 quake mag 1.4), Flores (3 quakes between mag 1.6-1.9), Grímsnes (2 quakes between mag 0.0-1.9), Katla (9 quakes between mag 0.6-3.0), Kerlingarfjöll (1 quake mag 2.2), Kilauea (8 quakes between mag 1.5-2.4), Kolbeinsey Ridge (25 quakes between mag 0.0-3.7), Kolumbo (2 quakes between mag 1.8-1.8), Krísuvík (4 quakes between mag 0.7-1.2), Kverkfjöll (1 quake mag 1.4), Ljósufjöll (2 quakes between mag 0.8-1.5), Loihi (1 quake mag 1.8), Loki-Fögrufjöll volcano (3 quakes between mag 1.4-3.1), Olot Field (1 quake mag 1.0), Oshima (1 quake mag 2.1), Paluweh (1 quake mag 3.3), Pelée (2 quakes between mag 1.3-1.4), Prestahnukur (6 quakes between mag 0.4-1.8), Reporoa (2 quakes between mag 1.5-1.9), San Salvador (2 quakes between mag 1.9-2.5), Sousaki (1 quake mag 1.5), Spurr (1 quake mag 2.1), Taupo (1 quake mag 1.4), Tecuamburro (1 quake mag 1.3), Tenerife (2 quakes between mag 1.0-1.5), Theistareykjarbunga (1 quake mag 1.0), Tjörnes Fracture Zone (1 quake mag 1.1), Torfajökull (5 quakes between mag 0.6-1.2), Ukinrek Maars (1 quake mag 1.6) (updated 16h50)\n\nNote: 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.\n
Volcanoes with recent earthquakes above magnitude 2 or more than 10 quakes are listed below:



Balut volcano (Mindanao): 5 earthquakes up to magnitude 2.7

5 earthquakes occurred near (under) the volcano during 18 hours, the last being recorded quake 5 hours ago. Hypocenter depths ranged between 38.00 and 4.00 km.
Earthquake details:
2.7 quake Philippine Sea, 13 km south of Sarangani Island, Philippines, Oct 4, 2026 07:21 pm (GMT +8) (10 km SE)
2.4 quake Celebes Sea, 24 km southwest of Sarangani Island, Philippines, Oct 4, 2026 12:52 am (GMT +8) (13 km SW)
2.1 quake Philippine Sea, 12 km west of Sarangani Island, Philippines, Oct 4, 2026 11:48 am (GMT +8) (7 km N)
1.8 quake Celebes Sea, 20 km west of Sarangani Island, Philippines, Oct 4, 2026 05:12 am (GMT +8) (9 km WNW)
1.8 quake Philippine Sea, 12 km northwest of Sarangani Island, Philippines, Oct 4, 2026 01:01 am (GMT +8) (11 km N)
All earthquakes at Balut
Balut is an 840 m island stratovolcano south of Mindanao whose last known eruption occurred between about 2 million and 11,700 years ago. Hot springs and thermally altered ground occur on its western and southwestern flanks.

Brennisteinsfjöll volcano (Reykjanes Peninsula, Iceland): 15 earthquakes up to magnitude 3.3

Possible earthquake swarm: 15 earthquakes occurred near (under) the volcano during 10 hours, the last being recorded quake 7 hours ago. Hypocenter depths ranged between 5.20 and 0.00 km.
Earthquake details: (only 5 largest)
3.3 quake Southern Peninsula, 19 km south of Reykjavik, Capital Region, Iceland, Oct 4, 2026 12:40 am (GMT +0) (5 km N)
2.3 quake Iceland: 6.6 km S of Helgafell Oct 4, 2026 03:32 am (Reykjavik time) (3 km N)
1.8 quake 6.9 km SSE of Helgafell Oct 4, 2026 02:58 am (Universal Time) (3 km N)
1.7 quake 5.4 km SW of Helgafell Oct 4, 2026 10:13 am (Universal Time) (7 km NW)
0.8 quake Iceland: 7.7 km S of Helgafell Oct 4, 2026 12:43 am (Reykjavik time) (2 km N)
All earthquakes at Brennisteinsfjöll
Brennisteinsfjöll is an Icelandic volcanic system of crater rows and small shield volcanoes with an eruptive record extending back about 11,000 years. Its last known eruption occurred around 1341.

Clear Lake volcano (California): 23 earthquakes up to magnitude 1.8

Possible earthquake swarm: 23 earthquakes occurred near (under) the volcano during 20 hours, the last being recorded quake 3 hours ago. Hypocenter depths ranged between 3.78 and 0.82 km.
Earthquake details: (only 5 largest)
1.8 quake Sonoma County, 13 mi southwest of Clearlake, Lake County, California, United States, Oct 3, 2026 01:48 pm (GMT -7) (16 km S)
1.6 quake 12 mi southwest of Clearlake, Lake County, California, United States, Oct 4, 2026 12:11 am (GMT -7) (12 km SSW)
1.2 quake 26 mi north of Santa Rosa, Sonoma County, California, United States, Oct 3, 2026 03:15 pm (GMT -7) (18 km SSW)
1.1 quake 28 mi north of Santa Rosa, Sonoma County, California, United States, Oct 4, 2026 02:38 am (GMT -7) (16 km SSW)
1.1 quake Lake County, 27 mi north of Santa Rosa, Sonoma County, California, United States, Oct 3, 2026 09:14 pm (GMT -7) (16 km S)
All earthquakes at Clear Lake

Katla volcano (Iceland): 9 earthquakes up to magnitude 3.0

9 earthquakes occurred near (under) the volcano during 18 hours, the last being recorded quake 1 hour 40 minutes ago. Hypocenter depths ranged between 5.20 and 0.00 km.
Earthquake details: (only 5 largest)
3.0 quake South, 148 km east of Reykjavik, Capital Region, Iceland, Oct 3, 2026 09:44 pm (Reykjavik time) (2 km WNW)
2.9 quake South, 147 km east of Reykjavik, Capital Region, Iceland, Oct 3, 2026 09:27 pm (Universal Time) (2 km WNW)
1.9 quake Iceland: 6.4 km N of Hábunga Oct 3, 2026 09:51 pm (Reykjavik time) (2 km WNW)
1.5 quake 5.1 km ENE of Goðabunga Oct 4, 2026 08:46 am (Universal Time) (5 km WNW)
1.0 quake 5.6 km ENE of Goðabunga Oct 4, 2026 09:35 am (Universal Time) (5 km WNW)
All earthquakes at Katla

Kerlingarfjöll volcano (Iceland): magnitude 2.2 earthquake

A magnitude 2.2 earthquake occurred at the volcano 16 hours ago. The quake, which might be volcanic in origin, was located at a depth of 0 km depth at 9 km distance SSE from the volcano.
Earthquake details:
2.2 quake Iceland: 37.0 km SSE of Hveravellir Oct 4, 2026 12:40 am (Reykjavik time) (9 km SSE)
All earthquakes at Kerlingarfjöll

Kilauea volcano (Hawai'i (Big Island)): 8 earthquakes up to magnitude 2.4

8 earthquakes occurred near (under) the volcano during 21 hours, the last being recorded quake 1 hour 44 minutes ago. Hypocenter depths ranged between 44.05 and 0.08 km.
Earthquake details: (only 5 largest)
2.4 quake 25 mi southwest of Hilo, Hawaii County, Hawaii, United States, Oct 4, 2026 05:06 am (GMT -10) (2 km SE)
2.1 quake 25 mi southwest of Hilo, Hawaii County, Hawaii, United States, Oct 4, 2026 05:03 am (GMT -10) (1 km ESE)
2.1 quake 25 mi south of Hilo, Hawaii County, Hawaii, United States, Oct 4, 2026 12:33 am (GMT -10) (7 km ESE)
2.1 quake 8.3 mi northeast of Pāhala, Hawaii County, Hawaii, United States, Oct 3, 2026 05:06 pm (GMT -10) (19 km SSW)
2.0 quake 24 mi southwest of Hilo, Hawaii County, Hawaii, United States, Oct 3, 2026 04:14 pm (GMT -10) (3 km NNW)
All earthquakes at Kilauea

Kolbeinsey Ridge volcano (Iceland): 25 earthquakes up to magnitude 3.7

Possible earthquake swarm: 25 earthquakes occurred near (under) the volcano during 15 hours, the last being recorded quake 1 hour 10 minutes ago. Hypocenter depths ranged between 16.40 and 0.00 km.
Earthquake details: (only 5 largest)
3.7 quake 114 km north of Akureyri, Northeast, Iceland, Oct 4, 2026 01:13 pm (Universal Time) (8 km W)
3.4 quake 117 km north of Akureyri, Northeast, Iceland, Oct 4, 2026 09:04 am (Reykjavik time) (11 km WNW)
3.2 quake 115 km north of Akureyri, Northeast, Iceland, Oct 4, 2026 08:43 am (Reykjavik time) (9 km WNW)
2.8 quake 119 km north of Akureyri, Northeast, Iceland, Oct 4, 2026 03:31 pm (Reykjavik time) (10 km NW)
2.7 quake Iceland: 33.9 km WNW of Grímsey Oct 4, 2026 03:40 pm (Reykjavik time) (8 km WNW)
All earthquakes at Kolbeinsey Ridge
Kolbeinsey Ridge is a submarine fissure-vent system north of Iceland, with tiny Kolbeinsey Island as its only expression above sea level. Historical eruption reports from 1372 and 1755 have uncertain locations.

Loki-Fögrufjöll volcano volcano (Iceland): 3 earthquakes up to magnitude 3.1

3 earthquakes occurred near (under) the volcano during 16 hours, the last being recorded quake 5 hours ago. Hypocenter depths ranged between 3.50 and 1.90 km.
Earthquake details:
3.1 quake South, 207 km east of Reykjavik, Capital Region, Iceland, Oct 4, 2026 12:16 pm (Universal Time) (6 km E)
1.7 quake Iceland: 1.3 km ENE of Hamarinn Oct 3, 2026 08:05 pm (Reykjavik time) (2 km NNE)
1.4 quake Iceland: 0.7 km NE of Hamarinn Oct 3, 2026 08:17 pm (Reykjavik time) (1 km N)
All earthquakes at Loki-Fögrufjöll volcano

Oshima volcano (Izu Islands): magnitude 2.1 earthquake

A magnitude 2.1 earthquake occurred at the volcano 13 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 8 km distance N from the volcano.
Earthquake details:
2.1 quake North Pacific Ocean, Tokyo, 34 km southeast of Ito, Shizuoka, Japan, Oct 4, 2026 01:19 pm (GMT +9) (8 km N)
All earthquakes at Oshima
Izu-Oshima is an active island stratovolcano in Japan’s Izu Islands, with numerous recorded eruptions since the 7th century. Its major 1986 eruption produced high lava fountains, fissure-fed lava flows and the evacuation of more than 12,000 people.

Paluweh volcano (Lesser Sunda Islands): magnitude 3.3 earthquake

A magnitude 3.3 earthquake occurred at the volcano 3 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 19 km distance W from the volcano.
Earthquake details:
3.3 quake Flores Sea, 56 km north of Ende, Kabupaten Ende, East Nusa Tenggara, Indonesia, Oct 4, 2026 10:14 pm (GMT +8) (19 km W)
All earthquakes at Paluweh
Paluweh is an island-forming stratovolcano north of Flores, Indonesia. Its major eruptions include a destructive, tsunami-producing event in 1928 and deadly pyroclastic flows in 2013.

San Salvador volcano (El Salvador): 2 earthquakes up to magnitude 2.5

2 earthquakes occurred near (under) the volcano during 6 hours, the last being recorded quake 5 hours ago. Hypocenter depths ranged between 12.40 and 10.00 km.
Earthquake details:
2.5 quake Departamento de La Libertad, 27 km west of San Salvador, El Salvador, Oct 4, 2026 06:06 am (GMT -6) (15 km WNW)
1.9 quake 20 km northwest of Santa Tecla, Departamento de La Libertad, El Salvador, Oct 4, 2026 12:06 am (GMT -6) (15 km WNW)
All earthquakes at San Salvador
San Salvador is a large stratovolcano overlooking El Salvador’s capital. Its last known eruption, in 1917, formed a small cone inside the summit crater and sent a major lava flow down the northern flank.

Spurr volcano (Cook Inlet (SW Alaska)): magnitude 2.1 earthquake

A magnitude 2.1 earthquake occurred at the volcano 10 hours ago. The quake, which might be volcanic in origin, was located at a depth of 5.00 km depth at 1 km distance SSE from the volcano.
Earthquake details:
2.1 quake Kenai Peninsula Borough, 78 mi west of Anchorage, Anchorage Municipality, Alaska, United States, Oct 3, 2026 10:48 pm (GMT -8) (1 km SSE)
All earthquakes at Spurr
Spurr is an Alaskan stratovolcano about 130 km west of Anchorage. Explosive eruptions from its Crater Peak vent deposited ash on the city in 1953 and 1992.
https://www.volcanodiscovery.com/earthquakes-volcanoes/news/370876/Volcano-earthquake-report-2026-10-04.html