Volcano earthquake report for Thursday, 1 October 2026

Quakes detected near: Agua (2 quakes between mag 1.1-2.5), Akyarlar (5 quakes between mag 1.0-1.9), Askja (1 quake mag 1.6), Balut (3 quakes between mag 2.1-3.2), Clear Lake (28 quakes between mag 0.2-1.9), Flores (19 quakes between mag 0.9-2.5)
Grímsnes (1 quake mag 1.0), Hrómundartindur (14 quakes between mag 0.1-1.7), Hulubelu (2 quakes between mag 2.5-2.6), Kanlaon (6 quakes between mag 1.7-3.0), Kilauea (49 quakes between mag 0.8-3.4), Kolbeinsey Ridge (7 quakes between mag 2.2-3.3), Kolumbo (3 quakes between mag 1.8-2.1), Krísuvík (6 quakes between mag 0.3-1.9), Kuchinoshima (1 quake mag 3.3), Maunaloa (1 quake mag 1.6), Nemrut Dagi (1 quake mag 1.8), Pelée (3 quakes between mag 0.9-1.3), Platanar (1 quake mag 3.1), Prestahnukur (2 quakes between mag 1.8-2.8), Tambora (1 quake mag 2.9), Theistareykjarbunga (1 quake mag 1.7) (updated 19h50)\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:

Agua volcano (Guatemala): 2 earthquakes up to magnitude 2.5

2 earthquakes occurred near (under) the volcano during 7 hours, the last being recorded quake 12 hours ago. Hypocenter depths ranged between 3.90 and 2.30 km.
Earthquake details:
2.5 quake 10.6 km south of Antigua Guatemala, Departamento de Sacatepequez, Guatemala, Oct 1, 2026 01:51 am (GMT -6) (0 km SE)
1.1 quake Departamento de Sacatepequez, 5.3 km west of Amatitlan, Guatemala, Sep 30, 2026 06:49 pm (GMT -6) (6 km E)
All earthquakes at Agua
Agua is a prominent 3,760 m stratovolcano beside Antigua, Guatemala. It has no recorded eruptions, while a devastating mudflow destroyed Ciudad Vieja in 1541.

Balut volcano (Mindanao): 3 earthquakes up to magnitude 3.2

3 earthquakes occurred near (under) the volcano during 14 hours, the last being recorded quake 5 hours ago. Hypocenter depths ranged between 23.00 and 2.00 km.
Earthquake details:
3.2 quake Celebes Sea, 22 km west of Sarangani Island, Philippines, Oct 1, 2026 10:52 pm (GMT +8) (12 km WNW)
2.8 quake Philippine Sea, 21 km west of Sarangani Island, Philippines, Oct 1, 2026 08:42 am (GMT +8) (9 km WSW)
2.1 quake 12 km west of Sarangani, Davao Occidental, Davao, Philippines, Oct 1, 2026 09:06 am (GMT +8) (2 km W)
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.

Clear Lake volcano (California): 28 earthquakes up to magnitude 1.9

Possible earthquake swarm: 28 earthquakes occurred near (under) the volcano during 23 hours, the last being recorded quake 19 minutes ago. Hypocenter depths ranged between 3.38 and 0.68 km.
Earthquake details: (only 5 largest)
1.9 quake Sonoma County, 13 mi southwest of Clearlake, Lake County, California, United States, Oct 1, 2026 12:09 am (GMT -7) (16 km SSW)
1.5 quake Sonoma County, 13 mi southwest of Clearlake, Lake County, California, United States, Oct 1, 2026 12:10 am (GMT -7) (16 km SSW)
1.3 quake 26 mi north of Santa Rosa, Sonoma County, California, United States, Sep 30, 2026 03:19 pm (GMT -7) (18 km SSW)
1.2 quake 27 mi north of Santa Rosa, Sonoma County, California, United States, Oct 1, 2026 12:30 pm (GMT -7) (16 km SSW)
1.2 quake 28 mi north of Santa Rosa, Sonoma County, California, United States, Sep 30, 2026 09:47 pm (GMT -7) (17 km SSW)
All earthquakes at Clear Lake

Flores volcano (Guatemala): 19 earthquakes up to magnitude 2.5

Possible earthquake swarm: 19 earthquakes occurred near (under) the volcano during 20 hours, the last being recorded quake 1 hour 57 minutes ago. Hypocenter depths ranged between 4.10 and 0.90 km.
Earthquake details: (only 5 largest)
2.5 quake 24 km northeast of Cuilapa, Departamento de Santa Rosa, Guatemala, Oct 1, 2026 05:52 am (GMT -6) (14 km WNW)
2.5 quake 24 km northeast of Cuilapa, Departamento de Santa Rosa, Guatemala, Oct 1, 2026 11:52 am (GMT -6) (14 km WNW)
2.3 quake 24 km northeast of Cuilapa, Departamento de Santa Rosa, Guatemala, Sep 30, 2026 04:11 pm (GMT -6) (14 km WNW)
2.0 quake 23 km northeast of Cuilapa, Departamento de Santa Rosa, Guatemala, Sep 30, 2026 09:38 pm (GMT -6) (14 km WNW)
1.9 quake 24 km northeast of Cuilapa, Departamento de Santa Rosa, Guatemala, Oct 1, 2026 05:13 am (GMT -6) (15 km NW)
All earthquakes at Flores
Flores, also known as Volcán Amayo, is a volcanic field about 10 km west of Jutiapa in southeastern Guatemala. Its last eruption is undated, and none are known from approximately the past 11,700 years.

Hrómundartindur volcano (Iceland): 14 earthquakes up to magnitude 1.7

Possible earthquake swarm: 14 earthquakes occurred near (under) the volcano during 18 hours, the last being recorded quake 5 hours ago. Hypocenter depths ranged between 27.70 and 0.00 km.
Earthquake details: (only 5 largest)
1.7 quake Iceland: 3.6 km SSW of Þrengsli Oct 1, 2026 05:09 am (Reykjavik time) (14 km SSW)
1.4 quake 1.2 km NW of Skálafell Oct 1, 2026 05:08 am (Universal Time) (9 km S)
1.2 quake 0.9 km NNW of Skálafell Oct 1, 2026 05:09 am (Universal Time) (9 km S)
1.0 quake 0.4 km WNW of Raufarhólshellir Sep 30, 2026 11:14 pm (Universal Time) (16 km SSW)
1.0 quake 2.9 km E of Hveradalir Sep 30, 2026 08:51 pm (Universal Time) (7 km S)
All earthquakes at Hrómundartindur
Hrómundartindur is a small volcanic system in southwestern Iceland with an active geothermal area at Ölkeduháls. Its last eruption is uncertain, but activity is thought to have occurred about 10,000 years ago.

Hulubelu volcano (Sumatra): 2 earthquakes up to magnitude 2.6

2 earthquakes occurred near (under) the volcano during 44 minutes, the last being recorded quake 23 hours ago. Hypocenter depths ranged between 10.00 and 10.00 km.
Earthquake details:
2.6 quake Kabupaten Tanggamus, 74 km west of Bandar Lampung, Indonesia, Oct 1, 2026 03:50 am (GMT +7) (4 km SE)
2.5 quake Kabupaten Tanggamus, 74 km west of Bandar Lampung, Indonesia, Oct 1, 2026 03:06 am (GMT +7) (3 km SE)
All earthquakes at Hulubelu
Hulubelu is a 4-km-long volcanic depression in southeastern Sumatra. Its last eruption is not precisely dated, and none is known from approximately the past 11,700 years.

Kanlaon volcano (Central Philippines): 6 earthquakes up to magnitude 3.0

6 earthquakes occurred near (under) the volcano during 7 hours, the last being recorded quake 1 hour 40 minutes ago. Hypocenter depths ranged between 7.00 and 1.00 km.
Earthquake details: (only 5 largest)
3.0 quake 9.8 km east of La Carlota, Philippines, Oct 1, 2026 09:09 pm (GMT +8) (14 km W)
2.9 quake 10.9 km east of La Carlota, Philippines, Oct 2, 2026 02:10 am (GMT +8) (12 km W)
2.8 quake 20 km east of La Carlota, Philippines, Oct 1, 2026 10:03 pm (GMT +8) (7 km NNW)
2.6 quake 20 km east of La Carlota, Philippines, Oct 1, 2026 07:14 pm (GMT +8) (7 km NNW)
2.1 quake 23 km southeast of Mansilingan, Philippines, Oct 1, 2026 07:44 pm (GMT +8) (7 km NW)
All earthquakes at Kanlaon
Kanlaon is a 2,422-m-high stratovolcano and the highest point on the Philippine island of Negros. Its frequently explosive historical activity includes a deadly 1996 eruption and stronger eruptions during 2024-26.

Kilauea volcano (Hawai'i (Big Island)): 49 earthquakes up to magnitude 3.4

Possible earthquake swarm: 49 earthquakes occurred near (under) the volcano during 11 hours, the last being recorded quake 8 hours ago. Hypocenter depths ranged between 5.65 and 0.00 km.
Earthquake details: (only 5 largest)
3.4 quake 25 mi southwest of Hilo, Hawaii County, Hawaii, United States, Sep 30, 2026 09:52 pm (GMT -10) (2 km ESE)
2.6 quake 25 mi southwest of Hilo, Hawaii County, Hawaii, United States, Sep 30, 2026 09:32 pm (GMT -10) (2 km SE)
2.6 quake 25 mi southwest of Hilo, Hawaii County, Hawaii, United States, Sep 30, 2026 08:47 pm (GMT -10) (1 km SE)
2.5 quake 24 mi southwest of Hilo, Hawaii County, Hawaii, United States, Sep 30, 2026 11:55 pm (GMT -10) (2 km E)
2.4 quake 25 mi southwest of Hilo, Hawaii County, Hawaii, United States, Sep 30, 2026 11:26 pm (GMT -10) (1 km SE)
All earthquakes at Kilauea

Kolbeinsey Ridge volcano (Iceland): 7 earthquakes up to magnitude 3.3

7 earthquakes occurred near (under) the volcano during 7 hours, the last being recorded quake 12 hours ago. Hypocenter depths ranged between 10.00 and 0.20 km.
Earthquake details: (only 5 largest)
3.3 quake 58 km north of Siglufjordur, Northeast, Iceland, Oct 1, 2026 06:49 am (Universal Time) (8 km W)
3.3 quake 115 km north of Akureyri, Northeast, Iceland, Oct 1, 2026 12:37 am (Universal Time) (9 km WNW)
2.6 quake 36.1 km NW of Grímsey Oct 1, 2026 01:27 am (Universal Time) (10 km NW)
2.5 quake 35.2 km WNW of Grímsey Oct 1, 2026 07:49 am (Universal Time) (10 km WNW)
2.5 quake 35.6 km WNW of Grímsey Oct 1, 2026 06:37 am (Universal Time) (10 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.

Kolumbo volcano (Greece): 3 earthquakes up to magnitude 2.1

3 earthquakes occurred near (under) the volcano during 1 hour 26 minutes, the last being recorded quake 4 hours ago. Hypocenter depths ranged between 14.10 and 5.00 km.
Earthquake details:
2.1 quake Aegean Sea, 21 km northeast of Santorini Island, Greece, Oct 1, 2026 06:07 pm (GMT +3) (11 km ENE)
2.0 quake Aegean Sea, 21 km northeast of Santorini Island, Greece, Oct 1, 2026 05:03 pm (GMT +3) (10 km ENE)
1.8 quake Aegean Sea, 20 km northeast of Santorini Island, Greece, Oct 1, 2026 06:29 pm (GMT +3) (9 km ENE)
All earthquakes at Kolumbo

Kuchinoshima volcano (Ryukyu Islands): magnitude 3.3 earthquake

A magnitude 3.3 earthquake occurred at the volcano 45 minutes ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 10 km distance SE from the volcano.
Earthquake details:
3.3 quake East China Sea, Kagoshima-ken, 40 km northeast of Suwanose-jima Island, Japan, Oct 2, 2026 04:05 am (GMT +9) (10 km SE)
All earthquakes at Kuchinoshima
Kuchinoshima is a 628 m-high volcanic island in Japan’s northern Ryukyu Islands, formed by stratovolcanoes and numerous lava domes. Four radiocarbon-dated eruptive periods are listed, ending with an eruption centered on 1190 CE.

Platanar volcano (Costa Rica): magnitude 3.1 earthquake

A magnitude 3.1 earthquake occurred at the volcano 4 hours ago. The quake, which might be volcanic in origin, was located at a depth of 5.00 km depth at 16 km distance SSW from the volcano.
Earthquake details:
3.1 quake Provincia de Alajuela, 46 km northwest of San Jose, Costa Rica, Oct 1, 2026 10:01 am (GMT -6) (16 km SSW)
All earthquakes at Platanar
Platanar is a large Costa Rican volcanic complex crowned by the 2,267 m Porvenir stratovolcano. No historical eruption is known, but geological evidence suggests possible activity within the past few thousand years.

Prestahnukur volcano (Iceland): 2 earthquakes up to magnitude 2.8

2 earthquakes occurred near (under) the volcano during 28 minutes, the last being recorded quake 1 hour 3 minutes ago. Hypocenter depths ranged between 3.70 and 3.50 km.
Earthquake details:
2.8 quake West, 92 km northeast of Reykjavik, Capital Region, Iceland, Oct 1, 2026 06:19 pm (Reykjavik time) (10 km NE)
1.8 quake Iceland: 13.4 km S of Eiríksjökull Oct 1, 2026 06:47 pm (Reykjavik time) (10 km ENE)
All earthquakes at Prestahnukur
Prestahnúkur is a roughly 90-km-long volcanic system beside the Langjökull icecap in Iceland. Its three known eruptions occurred during the past 10,000 years, the last at approximately 3350 BCE.

Tambora volcano (Sumbawa): magnitude 2.9 earthquake

A magnitude 2.9 earthquake occurred at the volcano 6 hours ago. The quake, which might be volcanic in origin, was located at a depth of 28.00 km depth at 19 km distance W from the volcano.
Earthquake details:
2.9 quake Kabupaten Dompu, West Nusa Tenggara, Indonesia, Oct 1, 2026 10:16 pm (GMT +8) (19 km W)
All earthquakes at Tambora
https://www.volcanodiscovery.com/earthquakes-volcanoes/news/368685/Volcano-earthquake-report-2026-10-01.html