Volcano earthquake report for Wednesday, 21 October 2026
World map showing volcanoes with shallow (less than 50 km) earthquakes within 20 km radius during the past 24 hours on 21 Oct 2026 Number in brackets indicate nr of quakes.

Quakes detected near: Apaneca Range (6 quakes between mag 2.2-3.1), Balut (5 quakes between mag 1.4-2.5), Clear Lake (22 quakes between mag 0.2-2.4), Coso (2 quakes between mag 1.1-1.2), Etna (6 quakes between mag 1.1-3.7), Flores (5 quakes between mag 1.3-2.1)
Hakone (1 quake mag 2.3), Hrómundartindur (1 quake mag 1.1), Kanlaon (1 quake mag 3.0), Kilauea (5 quakes between mag 1.8-2.8), Kolumbo (1 quake mag 1.4), Ljósufjöll (7 quakes between mag 0.0-1.0), Loihi (1 quake mag 1.9), Maunaloa (1 quake mag 2.3), Mayotte Island (2 quakes between mag 1.3-1.4), Ngauruhoe (2 quakes between mag 0.7-1.5), Prestahnukur (1 quake mag 1.4), Salton Buttes (2 quakes between mag 1.1-1.6), Sandal (1 quake mag 1.3), Sousaki (1 quake mag 1.0), Svartsengi (4 quakes between mag 0.5-1.2), Tecapa (4 quakes between mag 3.1-4.4), Vatnafjöll (3 quakes between mag 0.3-1.2), Zapatera (1 quake mag 3.0) (updated 07h50)\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:



Apaneca Range volcano (El Salvador): 6 earthquakes up to magnitude 3.1

6 earthquakes occurred near (under) the volcano during 21 minutes, the last being recorded quake 21 hours ago. Hypocenter depths ranged between 11.00 and 3.50 km.
Earthquake details: (only 5 largest)
3.1 quake 9.7 km southeast of Ahuachapan, Departamento de Ahuachapan, El Salvador, Oct 20, 2026 04:35 am (GMT -6) (5 km WSW)
3.1 quake 9.7 km southeast of Ahuachapan, Departamento de Ahuachapan, El Salvador, Oct 20, 2026 04:35 am (GMT -6) (4 km WSW)
3.0 quake 10.5 km southeast of Ahuachapan, Departamento de Ahuachapan, El Salvador, Oct 20, 2026 04:30 am (GMT -6) (5 km WSW)
2.9 quake 10.1 km southeast of Ahuachapan, Departamento de Ahuachapan, El Salvador, Oct 20, 2026 04:30 am (GMT -6) (4 km WSW)
2.9 quake 20 km north of Sonsonate, Departamento de Sonsonate, El Salvador, Oct 20, 2026 04:28 am (GMT -6) (3 km NNW)
All earthquakes at Apaneca Range
The Apaneca Range is a chain of stratovolcanoes, lava domes and thermal areas in western El Salvador. Its dated eruptive history is uncertain, but deadly hydrothermal activity occurred at Agua Shuca in 1990, followed by another explosion there in July 2025.

Balut volcano (Mindanao): 5 earthquakes up to magnitude 2.5

5 earthquakes occurred near (under) the volcano during 16 hours, the last being recorded quake 1 hour 48 minutes ago. Hypocenter depths ranged between 33.00 and 2.00 km.
Earthquake details:
2.5 quake Philippine Sea, 4.2 km northwest of Sarangani Island, Philippines, Oct 21, 2026 01:12 pm (GMT +8) (11 km NE)
2.4 quake Philippine Sea, 10 km northwest of Sarangani Island, Philippines, Oct 21, 2026 04:45 am (GMT +8) (11 km NNE)
2.0 quake Celebes Sea, 17 km west of Sarangani Island, Philippines, Oct 20, 2026 10:01 pm (GMT +8) (7 km WNW)
1.6 quake Celebes Sea, 19 km northwest of Sarangani Island, Philippines, Oct 20, 2026 09:42 pm (GMT +8) (14 km NNW)
1.4 quake Philippine Sea, 12 km northwest of Sarangani Island, Philippines, Oct 21, 2026 02:02 pm (GMT +8) (10 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.

Clear Lake volcano (California): 22 earthquakes up to magnitude 2.4

Possible earthquake swarm: 22 earthquakes occurred near (under) the volcano during 22 hours, the last being recorded quake 1 hour 30 minutes ago. Hypocenter depths ranged between 32.90 and 0.12 km.
Earthquake details: (only 5 largest)
2.4 quake 19 mi southeast of Ukiah, Mendocino County, California, United States, Oct 20, 2026 07:45 am (GMT -7) (19 km WSW)
1.7 quake 10.7 mi southwest of Clearlake, Lake County, California, United States, Oct 20, 2026 04:13 am (GMT -7) (15 km S)
1.6 quake Sonoma County, 13 mi southwest of Clearlake, Lake County, California, United States, Oct 20, 2026 11:20 pm (GMT -7) (15 km SSW)
1.5 quake 13 mi southwest of Clearlake, Lake County, California, United States, Oct 20, 2026 10:19 pm (GMT -7) (15 km S)
1.1 quake 27 mi north of Santa Rosa, Sonoma County, California, United States, Oct 20, 2026 10:28 pm (GMT -7) (18 km SSW)
All earthquakes at Clear Lake

Etna volcano (Italy): 6 earthquakes up to magnitude 3.7

6 earthquakes occurred near (under) the volcano during 20 hours, the last being recorded quake 49 minutes ago. Hypocenter depths ranged between 9.41 and 4.00 km.
Earthquake details: (only 5 largest)
3.7 quake 13 km west of Giarre, Province of Catania, Sicily, Italy, Oct 21, 2026 08:49 am (GMT +2) (4 km E)
1.8 quake 13 km west of Giarre, Province of Catania, Sicily, Italy, Oct 21, 2026 08:51 am (GMT +2) (3 km ESE)
1.8 quake 4.5 km northeast of Bronte, Province of Catania, Sicily, Italy, Oct 20, 2026 12:44 pm (GMT +2) (14 km NW)
1.5 quake 13 km west of Giarre, Province of Catania, Sicily, Italy, Oct 21, 2026 08:53 am (GMT +2) (4 km E)
1.2 quake 11 km west of Giarre, Province of Catania, Sicily, Italy, Oct 21, 2026 09:00 am (GMT +2) (6 km ESE)
All earthquakes at Etna
Etna is a frequently active stratovolcano in Sicily with documented eruptions dating to about 1500 BCE. Its activity ranges from summit explosions and lava fountains to flank eruptions with extensive lava flows.

Flores volcano (Guatemala): 5 earthquakes up to magnitude 2.1

5 earthquakes occurred near (under) the volcano during 13 hours, the last being recorded quake 10 hours ago. Hypocenter depths ranged between 5.00 and 2.10 km.
Earthquake details:
2.1 quake 24 km northeast of Cuilapa, Departamento de Santa Rosa, Guatemala, Oct 20, 2026 04:30 am (GMT -6) (14 km NW)
1.9 quake 22 km northeast of Cuilapa, Departamento de Santa Rosa, Guatemala, Oct 20, 2026 03:05 am (GMT -6) (15 km WNW)
1.7 quake 23 km northeast of Cuilapa, Departamento de Santa Rosa, Guatemala, Oct 20, 2026 04:01 pm (GMT -6) (15 km WNW)
1.6 quake 24 km northeast of Cuilapa, Departamento de Santa Rosa, Guatemala, Oct 20, 2026 03:09 am (GMT -6) (13 km WNW)
1.3 quake 21 km northeast of Cuilapa, Departamento de Santa Rosa, Guatemala, Oct 20, 2026 12:58 pm (GMT -6) (16 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.

Hakone volcano (Honshu): magnitude 2.3 earthquake

A magnitude 2.3 earthquake occurred at the volcano 14 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 4 km distance SSW from the volcano.
Earthquake details:
2.3 quake 16 km southwest of Odawara, Kanagawa, Japan, Oct 21, 2026 02:40 am (GMT +9) (4 km SSW)
All earthquakes at Hakone
Hakone is a caldera-and-dome volcanic complex about 80 km southwest of Tokyo. Its Owakudani thermal area produced small explosions, local ashfall and new fumaroles in 2015.

Kanlaon volcano (Central Philippines): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 16 hours ago. The quake, which might be volcanic in origin, was located at a depth of 17.00 km depth at 17 km distance ESE from the volcano.
Earthquake details:
3.0 quake 6.3 km east of Canlaon, Philippines, Oct 20, 2026 11:40 pm (GMT +8) (17 km ESE)
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)): 5 earthquakes up to magnitude 2.8

5 earthquakes occurred near (under) the volcano during 20 hours, the last being recorded quake 4 hours ago. Hypocenter depths ranged between 39.47 and 0.34 km.
Earthquake details:
2.8 quake 25 mi southwest of Hilo, Hawaii County, Hawaii, United States, Oct 19, 2026 10:40 pm (GMT -10) (6 km ESE)
2.7 quake 25 mi southwest of Hilo, Hawaii County, Hawaii, United States, Oct 19, 2026 10:40 pm (GMT -10) (5 km SE)
2.2 quake 8.1 mi north of Pāhala, Hawaii County, Hawaii, United States, Oct 20, 2026 06:19 pm (GMT -10) (19 km SW)
1.9 quake 12 mi southwest of Volcano, Hawaii County, Hawaii, United States, Oct 19, 2026 10:16 pm (GMT -10) (14 km SSW)
1.8 quake 28 mi south of Hilo, Hawaii County, Hawaii, United States, Oct 19, 2026 10:31 pm (GMT -10) (15 km SE)
All earthquakes at Kilauea

Maunaloa volcano (Hawai'i (Big Island)): magnitude 2.3 earthquake

A magnitude 2.3 earthquake occurred at the volcano 7 hours ago. The quake, which might be volcanic in origin, was located at a depth of 44.98 km depth at 6 km distance SSW from the volcano.
Earthquake details:
2.3 quake 24 mi southeast of Holualoa, Hawaii County, Hawaii, United States, Oct 20, 2026 02:46 pm (GMT -10) (6 km SSW)
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.

Tecapa volcano (El Salvador): 4 earthquakes up to magnitude 4.4

4 earthquakes occurred near (under) the volcano during 6 hours, the last being recorded quake 14 hours ago. Hypocenter depths ranged between 6.50 and 1.70 km.
Earthquake details:
4.4 quake 19 km northwest of Usulutan, Departamento de Usulutan, El Salvador, Oct 20, 2026 05:23 am (El Salvador time) (2 km W)
3.5 quake 22 km north of Usulutan, Departamento de Usulutan, El Salvador, Oct 20, 2026 11:23 am (GMT -6) (5 km NNE)
3.1 quake 22 km north of Usulutan, Departamento de Usulutan, El Salvador, Oct 20, 2026 11:13 am (GMT -6) (5 km N)
3.1 quake 23 km north of Usulutan, Departamento de Usulutan, El Salvador, Oct 20, 2026 11:16 am (GMT -6) (5 km N)
All earthquakes at Tecapa
Tecapa is an El Salvador volcanic complex distinguished by the Laguna de Alegría crater lake, fumarolic activity and the Berlín geothermal field. Its last eruption is undated, and a reported event in 1878 remains uncertain.

Unnamed 24.00°N/121.83°E volcano (Taiwan): magnitude 3.4 earthquake

A magnitude 3.4 earthquake occurred at the volcano 12 hours ago. The quake, which might be volcanic in origin, was located at a depth of 18.20 km depth at 14 km distance WNW from the volcano.
Earthquake details:
3.4 quake Philippine Sea, 12 km northeast of Hualien City, Taiwan, Oct 21, 2026 04:03 am (Taipei time) (14 km WNW)
All earthquakes at Unnamed 24.00°N/121.83°E

Zapatera volcano (Nicaragua): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 14 hours ago. The quake, which might be volcanic in origin, was located at a depth of 6.00 km depth at 13 km distance SSE from the volcano.
Earthquake details:
3.0 quake 39 km southeast of Granada, Departamento de Granada, Nicaragua, Oct 20, 2026 11:29 am (GMT -6) (13 km SSE)
All earthquakes at Zapatera
Zapatera is a 629-m-high shield volcano forming a forested island in western Lake Nicaragua. Its last eruption is undated, and no eruption is known from approximately the past 12,000 years.
https://www.volcanodiscovery.com/earthquakes-volcanoes/news/383766/Volcano-earthquake-report-2026-10-21.html