Volcano earthquake report for Sunday, 4 October 2026

Quakes detected near: Alaska Peninsula Arc at 155.4°W (1 quake mag 1.6), Askja (3 quakes between mag 0.1-1.4), Balut (3 quakes between mag 1.8-2.7), Bardarbunga (6 quakes between mag 0.3-1.5), Brennisteinsfjöll (16 quakes between mag 0.0-3.3), Clear Lake (23 quakes between mag 0.2-1.6)
Coso (9 quakes between mag 0.3-1.6), Cuilapa-Barbarena (1 quake mag 1.1), Flores (3 quakes between mag 1.6-1.9), Grímsnes (2 quakes between mag 0.0-1.9), Katla (12 quakes between mag 0.6-3.0), Kerlingarfjöll (1 quake mag 2.2), Kilauea (7 quakes between mag 1.8-2.4), Kolbeinsey Ridge (29 quakes between mag 0.0-3.7), Kolumbo (1 quake mag 1.8), Kverkfjöll (1 quake mag 1.4), Ljósufjöll (2 quakes between mag 0.8-1.5), Loihi (2 quakes between mag 1.8-1.9), Loki-Fögrufjöll volcano (1 quake mag 3.1), Maunaloa (1 quake mag 2.5), 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 (7 quakes between mag 0.4-1.8), Reporoa (2 quakes between mag 1.5-1.9), Rotorua (1 quake mag 1.7), San Salvador (2 quakes between mag 1.9-2.5), Sousaki (1 quake mag 1.5), Spurr (1 quake mag 2.1), Taupo (2 quakes between mag 1.4-2.2), Tecuamburro (1 quake mag 1.3), Tenerife (1 quake mag 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), Vesuvius (6 quakes between mag 0.1-1.1) (updated 20h50)\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): 3 earthquakes up to magnitude 2.7

3 earthquakes occurred near (under) the volcano during 14 hours, the last being recorded quake 9 hours ago. Hypocenter depths ranged between 38.00 and 24.00 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)
2.1 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)
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): 16 earthquakes up to magnitude 3.3

Possible earthquake swarm: 16 earthquakes occurred near (under) the volcano during 19 hours, the last being recorded quake 1 hour 22 minutes 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 1.6

Possible earthquake swarm: 23 earthquakes occurred near (under) the volcano during 23 hours, the last being recorded quake 54 minutes ago. Hypocenter depths ranged between 6.62 and 1.41 km.
Earthquake details: (only 5 largest)
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 10:15 pm (Universal Time) (18 km SSW)
1.1 quake 28 mi north of Santa Rosa, Sonoma County, California, United States, Oct 4, 2026 09:38 am (Universal Time) (16 km SSW)
1.1 quake Lake County, 27 mi north of Santa Rosa, Sonoma County, California, United States, Oct 4, 2026 04:14 am (Universal Time) (16 km S)
1.1 quake 28 mi north of Santa Rosa, Sonoma County, California, United States, Oct 3, 2026 07:46 pm (GMT -7) (16 km SSW)
All earthquakes at Clear Lake

Katla volcano (Iceland): 12 earthquakes up to magnitude 3.0

Possible earthquake swarm: 12 earthquakes occurred near (under) the volcano during 22 hours, the last being recorded quake 1 hour 1 minutes ago. Hypocenter depths ranged between 10.30 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 (Universal 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 6.4 km N of Hábunga Oct 3, 2026 09:51 pm (Universal Time) (2 km WNW)
1.5 quake 4.8 km ENE of Goðabunga Oct 4, 2026 08:46 am (Universal Time) (5 km WNW)
1.3 quake Iceland: 4.2 km NNW of Hábunga Oct 4, 2026 04:36 pm (Reykjavik time) (4 km WSW)
All earthquakes at Katla

Kerlingarfjöll volcano (Iceland): magnitude 2.2 earthquake

A magnitude 2.2 earthquake occurred at the volcano 20 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)): 7 earthquakes up to magnitude 2.4

7 earthquakes occurred near (under) the volcano during 13 hours, the last being recorded quake 6 hours 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): 29 earthquakes up to magnitude 3.7

Possible earthquake swarm: 29 earthquakes occurred near (under) the volcano during 17 hours, the last being recorded quake 2 hours ago. Hypocenter depths ranged between 16.40 and 0.00 km.
Earthquake details: (only 5 largest)
3.7 quake 59 km north of Siglufjordur, 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 36.0 km WNW of Grímsey Oct 4, 2026 08:41 am (Universal Time) (11 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): magnitude 3.1 earthquake

A magnitude 3.1 earthquake occurred at the volcano 9 hours ago. The quake, which might be volcanic in origin, was located at a depth of 1.90 km depth at 6 km distance E from the volcano.
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)
All earthquakes at Loki-Fögrufjöll volcano

Maunaloa volcano (Hawai'i (Big Island)): magnitude 2.5 earthquake

A magnitude 2.5 earthquake occurred at the volcano 4 hours ago. The quake, which might be volcanic in origin, was located at a depth of 40.69 km depth at 5 km distance SSE from the volcano.
Earthquake details:
2.5 quake 39 mi southwest of Hilo, Hawaii County, Hawaii, United States, Oct 4, 2026 07:15 am (GMT -10) (5 km SSE)
All earthquakes at Maunaloa
Maunaloa is a huge, frequently active shield volcano on Hawaiʻi’s Big Island. Its predominantly lava-producing eruptions include a well-documented episode in November–December 2022.

Oshima volcano (Izu Islands): magnitude 2.1 earthquake

A magnitude 2.1 earthquake occurred at the volcano 17 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 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 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 9 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 14 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.

Taupo volcano (New Zealand): 2 earthquakes up to magnitude 2.2

2 earthquakes occurred near (under) the volcano during 3 hours, the last being recorded quake 2 hours ago. Hypocenter depths ranged between 5.00 and 5.00 km.
Earthquake details:
2.2 quake 19 km southwest of Taupo, Waikato, New Zealand, Oct 5, 2026 07:41 am (GMT +13) (11 km SE)
1.4 quake 15 km southwest of Taupo, Waikato, New Zealand, Oct 5, 2026 05:08 am (GMT +13) (7 km E)
All earthquakes at Taupo
Lake-filled Taupo produced its largest known eruption about 22,600 years ago. Its last major eruption occurred about 1,800 years ago and was New Zealand’s largest during approximately the past 12,000 years.
https://www.volcanodiscovery.com/earthquakes-volcanoes/news/370876/Volcano-earthquake-report-2026-10-04.html