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 (3 quakes between mag 0.8-1.4), Balut (7 quakes between mag 1.7-2.4), Bardarbunga (2 quakes between mag 1.1-1.5), Brennisteinsfjöll (15 quakes between mag 0.0-3.3), Clear Lake (29 quakes between mag 0.2-2.0), Colima (4 quakes between mag 2.4-2.5)
Cuilapa-Barbarena (2 quakes between mag 1.1-1.1), Esjufjöll (1 quake mag 1.5), Eyafjallajökull (1 quake mag 1.4), Flores (1 quake mag 1.5), Grímsnes (1 quake mag 1.9), Grímsvötn (2 quakes between mag 1.6-4.5), Hekla (2 quakes between mag 1.4-1.6), Katla (8 quakes between mag 0.6-3.0), Kerlingarfjöll (1 quake mag 2.2), Kilauea (9 quakes between mag 1.3-2.3), Kolbeinsey Ridge (12 quakes between mag 0.0-3.4), Kolumbo (1 quake mag 1.8), Krísuvík (4 quakes between mag 0.7-1.2), Ljósufjöll (2 quakes between mag 0.6-1.5), Loihi (1 quake mag 1.8), Loki-Fögrufjöll volcano (2 quakes between mag 1.4-1.7), Olot Field (1 quake mag 1.0), Oshima (1 quake mag 2.1), Prestahnukur (3 quakes between mag 0.4-1.8), Spurr (4 quakes between mag 0.6-2.1), Tenerife (1 quake mag 1.0), Theistareykjarbunga (1 quake mag 1.0), Tjörnes Fracture Zone (1 quake mag 1.1), Torfajökull (7 quakes between mag 0.6-1.2), Ukinrek Maars (1 quake mag 1.6) (updated 10h50)\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): 7 earthquakes up to magnitude 2.4

7 earthquakes occurred near (under) the volcano during 17 hours, the last being recorded quake 7 hours ago. Hypocenter depths ranged between 43.00 and 4.00 km.
Earthquake details: (only 5 largest)
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)
1.7 quake Province of Davao del Sur, 9.6 km west of Sarangani, Philippines, Oct 3, 2026 11:02 pm (GMT +8) (2 km SSE)
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 37 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): 29 earthquakes up to magnitude 2.0

Possible earthquake swarm: 29 earthquakes occurred near (under) the volcano during 23 hours, the last being recorded quake 1 hour 11 minutes ago. Hypocenter depths ranged between 3.78 and 0.72 km.
Earthquake details: (only 5 largest)
2.0 quake Sonoma County, 14 mi southwest of Clearlake, Lake County, California, United States, Oct 3, 2026 06:09 am (GMT -7) (17 km SSW)
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)
1.3 quake 27 mi north of Santa Rosa, Sonoma County, California, United States, Oct 3, 2026 07:51 am (GMT -7) (17 km S)
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)
All earthquakes at Clear Lake

Colima volcano (Western & Central Mexico): 4 earthquakes up to magnitude 2.5

4 earthquakes occurred near (under) the volcano during 6 minutes, the last being recorded quake 20 hours ago. Hypocenter depths ranged between 30.30 and 23.20 km.
Earthquake details:
2.5 quake 34 km west of Ciudad Guzman, Estado de Jalisco, Mexico, Oct 3, 2026 09:11 am (GMT -6) (19 km WNW)
2.5 quake 34 km west of Ciudad Guzman, Estado de Jalisco, Mexico, Oct 3, 2026 09:14 am (GMT -6) (18 km WNW)
2.4 quake 32 km west of Ciudad Guzman, Estado de Jalisco, Mexico, Oct 3, 2026 09:16 am (GMT -6) (16 km WNW)
2.4 quake 33 km west of Ciudad Guzman, Estado de Jalisco, Mexico, Oct 3, 2026 09:17 am (GMT -6) (18 km WNW)
All earthquakes at Colima
Colima, or Volcán de Fuego, is a frequently erupting stratovolcano in western Mexico. Its history includes summit-destroying explosions, lava-dome growth, pyroclastic flows and a confirmed eruption in 2019.

Grímsvötn volcano (Iceland): 2 earthquakes up to magnitude 4.5

2 earthquakes occurred near (under) the volcano at nearly the same time (11:54 UTC). Hypocenter depths ranged between 5.20 and 1.80 km.
Earthquake details:
4.5 quake Iceland: 11.7 km E of Grímsfjall Oct 3, 2026 11:53 am (Reykjavik time) (15 km E)
1.6 quake 17.3 km NNE of Grímsfjall Oct 3, 2026 11:54 am (Universal Time) (17 km NNE)
All earthquakes at Grímsvötn

Katla volcano (Iceland): 8 earthquakes up to magnitude 3.0

8 earthquakes occurred near (under) the volcano during 12 hours, the last being recorded quake 1 hour 15 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 Iceland: 5.2 km ENE of Goðabunga Oct 4, 2026 08:46 am (Reykjavik 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 10 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)): 9 earthquakes up to magnitude 2.3

9 earthquakes occurred near (under) the volcano during 24 hours, the last being recorded quake 17 minutes ago. Hypocenter depths ranged between 35.99 and 0.12 km.
Earthquake details: (only 5 largest)
2.3 quake 3.5 mi southwest of Volcano, Hawaii County, Hawaii, United States, Oct 3, 2026 05:50 am (GMT -10) (1 km SE)
2.3 quake 25 mi southwest of Hilo, Hawaii County, Hawaii, United States, Oct 3, 2026 05:48 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): 12 earthquakes up to magnitude 3.4

Possible earthquake swarm: 12 earthquakes occurred near (under) the volcano during 21 hours, the last being recorded quake 57 minutes ago. Hypocenter depths ranged between 11.90 and 1.10 km.
Earthquake details: (only 5 largest)
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)
2.7 quake 36.0 km WNW of Grímsey Oct 4, 2026 08:41 am (Universal Time) (11 km WNW)
2.2 quake Iceland: 40.1 km NW of Grímsey Oct 4, 2026 08:52 am (Reykjavik time) (14 km NW)
2.1 quake Iceland: 36.4 km WNW of Grímsey Oct 4, 2026 12:59 am (Reykjavik 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.

Oshima volcano (Izu Islands): 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 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.

Spurr volcano (Cook Inlet (SW Alaska)): 4 earthquakes up to magnitude 2.1

4 earthquakes occurred near (under) the volcano during 18 hours, the last being recorded quake 4 hours ago. Hypocenter depths ranged between 15.60 and 5.00 km.
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)
1.0 quake Kenai Peninsula Borough, 81 mi west of Anchorage, Anchorage Municipality, Alaska, United States, Oct 3, 2026 06:28 am (GMT -8) (14 km NNW)
0.7 quake Kenai Peninsula Borough, 78 mi west of Anchorage, Anchorage Municipality, Alaska, United States, Oct 3, 2026 06:29 am (GMT -8) (2 km NNE)
0.6 quake Kenai Peninsula Borough, 79 mi west of Anchorage, Anchorage Municipality, Alaska, United States, Oct 3, 2026 01:17 pm (Universal Time) (3 km NNW)
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