Volcano earthquake report for Wednesday, 23 September 2026

Quakes detected near: Agua (1 quake mag 1.0), Balut (4 quakes between mag 1.6-3.0), Bardarbunga (2 quakes between mag 1.3-1.4), Brennisteinsfjöll (2 quakes between mag 0.2-1.2), Cabalian (2 quakes between mag 2.3-2.4), Campi Flegrei (Phlegrean Fields) (10 quakes between mag 0.1-1.6)
Chingo (1 quake mag 2.2), Clear Lake (18 quakes between mag 0.3-1.7), Flores (3 quakes between mag 1.6-2.1), Ilopango (1 quake mag 2.1), Kilauea (3 quakes between mag 1.6-1.6), La Palma (1 quake mag 1.0), Makushin (5 quakes between mag 0.5-1.7), Masaya (1 quake mag 2.1), Methana (1 quake mag 1.9), Paluweh (2 quakes between mag 2.2-2.6), Prestahnukur (4 quakes between mag 0.5-2.0), Ruapehu (5 quakes between mag 0.6-1.3), Salton Buttes (2 quakes between mag 1.2-1.2), Svartsengi (7 quakes between mag 0.0-1.2), Taupo (2 quakes between mag 1.5-1.8), West Valley Segment (1 quake mag 2.8) (updated 23h50)\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): 4 earthquakes up to magnitude 3.0

4 earthquakes occurred near (under) the volcano during 19 hours, the last being recorded quake 4 hours ago. Hypocenter depths ranged between 44.00 and 18.00 km.
Earthquake details:
3.0 quake Celebes Sea, 23 km southwest of Sarangani Island, Philippines, Sep 23, 2026 08:28 am (GMT +8) (12 km SSW)
2.4 quake Celebes Sea, 25 km southwest of Sarangani Island, Philippines, Sep 24, 2026 03:38 am (GMT +8) (14 km SW)
2.0 quake Philippine Sea, 9.6 km west of Sarangani Island, Philippines, Sep 23, 2026 05:09 pm (GMT +8) (6 km NNE)
1.6 quake Celebes Sea, 19 km northwest of Sarangani Island, Philippines, Sep 23, 2026 09:53 pm (GMT +8) (14 km NNW)
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.

Cabalian volcano (Central Philippines): 2 earthquakes up to magnitude 2.4

2 earthquakes occurred near (under) the volcano during 1 hour 57 minutes, the last being recorded quake 13 hours ago. Hypocenter depths ranged between 4.00 and 1.00 km.
Earthquake details:
2.4 quake 37 km northeast of Maasin, Philippines, Sep 23, 2026 04:44 pm (GMT +8) (18 km WNW)
2.3 quake Province of Southern Leyte, 40 km south of Abuyog, Philippines, Sep 23, 2026 06:41 pm (GMT +8) (16 km NNW)
All earthquakes at Cabalian
Cabalían is a 912 m-high stratovolcano on southeastern Leyte, distinguished by its lake-filled summit crater. Radiocarbon evidence records an eruption around 1820, with an uncertainty of about 30 years.

Chingo volcano (Guatemala): 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 6.10 km depth at 17 km distance WSW from the volcano.
Earthquake details:
2.2 quake 24 km south of Jutiapa, Departamento de Jutiapa, Guatemala, Sep 23, 2026 02:16 am (GMT -6) (17 km WSW)
All earthquakes at Chingo
Chingo is a 1,775 m stratovolcano spanning the Guatemala–El Salvador border. Its last eruption is undated, and no eruption is known from approximately the past 11,700 years.

Clear Lake volcano (California): 18 earthquakes up to magnitude 1.7

Possible earthquake swarm: 18 earthquakes occurred near (under) the volcano during 21 hours, the last being recorded quake 15 minutes ago. Hypocenter depths ranged between 3.21 and 0.67 km.
Earthquake details: (only 5 largest)
1.7 quake Sonoma County, 14 mi southwest of Clearlake, Lake County, California, United States, Sep 23, 2026 03:30 pm (Universal Time) (17 km S)
1.4 quake 28 mi north of Santa Rosa, Sonoma County, California, United States, Sep 23, 2026 03:36 pm (GMT -7) (15 km S)
1.1 quake 28 mi north of Santa Rosa, Sonoma County, California, United States, Sep 23, 2026 07:39 pm (Universal Time) (16 km SSW)
1.1 quake Mendocino County, 29 mi north of Santa Rosa, Sonoma County, California, United States, Sep 23, 2026 02:14 am (GMT -7) (14 km SSW)
1.1 quake 26 mi north of Santa Rosa, Sonoma County, California, United States, Sep 22, 2026 07:27 pm (GMT -7) (18 km S)
All earthquakes at Clear Lake

Flores volcano (Guatemala): 3 earthquakes up to magnitude 2.1

3 earthquakes occurred near (under) the volcano during 12 hours, the last being recorded quake 12 hours ago. Hypocenter depths ranged between 13.10 and 3.60 km.
Earthquake details:
2.1 quake 22 km northeast of Cuilapa, Departamento de Santa Rosa, Guatemala, Sep 23, 2026 05:38 am (GMT -6) (15 km WNW)
1.9 quake 23 km northeast of Cuilapa, Departamento de Santa Rosa, Guatemala, Sep 22, 2026 07:27 pm (GMT -6) (14 km WNW)
1.6 quake 22 km northeast of Cuilapa, Departamento de Santa Rosa, Guatemala, Sep 22, 2026 06:06 pm (GMT -6) (15 km WNW)
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.

Ilopango volcano (El Salvador): magnitude 2.1 earthquake

A magnitude 2.1 earthquake occurred at the volcano 22 hours ago. The quake, which might be volcanic in origin, was located at a depth of 5.00 km depth at 1 km distance SW from the volcano.
Earthquake details:
2.1 quake 14 km east of San Salvador, Departamento de San Salvador, El Salvador, Sep 22, 2026 07:23 pm (GMT -6) (1 km SW)
All earthquakes at Ilopango

Masaya volcano (Nicaragua): magnitude 2.1 earthquake

A magnitude 2.1 earthquake occurred at the volcano 6 hours ago. The quake, which might be volcanic in origin, was located at a depth of 14.00 km depth at 9 km distance NNE from the volcano.
Earthquake details:
2.1 quake Departamento de Masaya, 14 km southeast of Managua, Nicaragua, Sep 23, 2026 12:00 pm (GMT -6) (9 km NNE)
All earthquakes at Masaya
Masaya is a frequently active Nicaraguan volcano about 20 km southeast of Managua. Known for its intermittent lava lake, it has also produced lava flows, explosive eruptions, ashfall and prolonged gas emissions.

Paluweh volcano (Lesser Sunda Islands): 2 earthquakes up to magnitude 2.6

2 earthquakes occurred near (under) the volcano during 4 hours, the last being recorded quake 12 hours ago. Hypocenter depths ranged between 10.00 and 10.00 km.
Earthquake details:
2.6 quake Flores Sea, 63 km north of Ende, Kabupaten Ende, East Nusa Tenggara, Indonesia, Sep 23, 2026 08:00 pm (GMT +8) (16 km WNW)
2.2 quake Flores Sea, 64 km north of Ende, Kabupaten Ende, East Nusa Tenggara, Indonesia, Sep 23, 2026 03:36 pm (GMT +8) (18 km WNW)
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.

West Valley Segment volcano (North Pacific Ocean): magnitude 2.8 earthquake

A magnitude 2.8 earthquake occurred at the volcano 19 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 12 km distance SSW from the volcano.
Earthquake details:
2.8 quake North Pacific Ocean, 225 km southwest of Vernon, Regional District of Mount Waddington, British Columbia, Canada, Sep 22, 2026 07:21 pm (GMT -9) (12 km SSW)
All earthquakes at West Valley Segment
West Valley Segment is a submarine fissure-vent cluster at the northern end of the Juan de Fuca Ridge. No eruption is known during approximately the past 12,000 years, though nearly 14,000 earthquakes were detected there during unrest in September 2001.
https://www.volcanodiscovery.com/earthquakes-volcanoes/news/362855/Volcano-earthquake-report-2026-09-23.html