Volcano earthquake report for Saturday, 17 October 2026

Quakes detected near: Askja (5 quakes between mag 0.0-1.2), Balut (4 quakes between mag 1.8-2.2), Bardarbunga (4 quakes between mag 0.0-1.7), Barva (1 quake mag 2.5), Clear Lake (12 quakes between mag 0.5-1.1), Esjufjöll (1 quake mag 1.0)
Fani Maoré (1 quake mag 2.7), Fisher (1 quake mag 1.8), Flores (23 quakes between mag 1.2-3.9), Great Sitkin (1 quake mag 1.1), Hekla (2 quakes between mag 0.2-1.6), Katla (2 quakes between mag 0.3-1.2), Kilauea (8 quakes between mag 1.0-2.4), Kukak (1 quake mag 1.2), Loihi (1 quake mag 1.9), Loki-Fögrufjöll volcano (4 quakes between mag 0.4-1.9), Mageik (1 quake mag 1.0), Matutum (1 quake mag 1.8), Maunaloa (1 quake mag 2.5), Mayon (1 quake mag 1.9), Moffett (1 quake mag 1.5), Ngauruhoe (3 quakes between mag 1.2-1.3), Orosí (1 quake mag 2.2), Paco (1 quake mag 1.5), Poas (1 quake mag 2.8), Prestahnukur (3 quakes between mag 1.2-1.7), Redoubt (1 quake mag 1.0), Rincón de la Vieja (1 quake mag 1.8), Ruapehu (1 quake mag 1.0), San Miguel (2 quakes between mag 0.0-2.1), Stepovak Bay 4 (1 quake mag 2.4), Tjörnes Fracture Zone (2 quakes between mag 0.7-1.1), Vulcano (1 quake mag 1.7), Wrangell (2 quakes between mag 1.0-1.4) (updated 18h50)\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 2.2

4 earthquakes occurred near (under) the volcano during 22 hours, the last being recorded quake 45 minutes ago. Hypocenter depths ranged between 46.00 and 24.00 km.
Earthquake details:
2.2 quake Philippine Sea, 4.5 km northwest of Sarangani Island, Philippines, Oct 17, 2026 03:36 am (GMT +8) (10 km NE)
2.0 quake Celebes Sea, 22 km southwest of Sarangani Island, Philippines, Oct 18, 2026 01:40 am (GMT +8) (11 km SW)
1.9 quake 13 km west of Sarangani, Davao Occidental, Davao, Philippines, Oct 17, 2026 05:09 am (GMT +8) (3 km WSW)
1.8 quake Celebes Sea, 28 km west of Sarangani Island, Philippines, Oct 18, 2026 02:05 am (GMT +8) (17 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.

Barva volcano (Costa Rica): magnitude 2.5 earthquake

A magnitude 2.5 earthquake occurred at the volcano 15 hours ago. The quake, which might be volcanic in origin, was located at a depth of 8.00 km depth at 3 km distance WNW from the volcano.
Earthquake details:
2.5 quake Provincia de Heredia, 24 km north of San Jose, Provincia de San Jose, Costa Rica, Oct 16, 2026 09:47 pm (GMT -6) (3 km WNW)
All earthquakes at Barva
Barva is a multi-peaked Costa Rican volcano near San José, also recorded as Barba and Las Tres Marías. Its only confirmed eruption dates to around 6050 BCE, while later historical reports are uncertain.

Clear Lake volcano (California): 12 earthquakes up to magnitude 1.1

Possible earthquake swarm: 12 earthquakes occurred near (under) the volcano during 18 hours, the last being recorded quake 1 hour 59 minutes ago. Hypocenter depths ranged between 3.29 and 0.81 km.
Earthquake details: (only 5 largest)
1.1 quake 27 mi north of Santa Rosa, Sonoma County, California, United States, Oct 17, 2026 08:10 am (GMT -7) (18 km SSW)
1.1 quake 27 mi north of Santa Rosa, Sonoma County, California, United States, Oct 17, 2026 06:19 am (GMT -7) (17 km S)
1.1 quake 28 mi north of Santa Rosa, Sonoma County, California, United States, Oct 16, 2026 06:07 pm (GMT -7) (16 km SSW)
1.0 quake Lake County, 28 mi north of Santa Rosa, Sonoma County, California, United States, Oct 16, 2026 11:49 pm (GMT -7) (15 km S)
1.0 quake 28 mi north of Santa Rosa, Sonoma County, California, United States, Oct 16, 2026 06:38 pm (GMT -7) (16 km SSW)
All earthquakes at Clear Lake

Fani Maoré volcano (Indian Ocean): magnitude 2.7 earthquake

A magnitude 2.7 earthquake occurred at the volcano 19 hours ago. The quake, which might be volcanic in origin, was located at a depth of 38.82 km depth at 12 km distance NW from the volcano.
Earthquake details:
2.7 quake 45 km east of Mamoudzou, Mamoudzou, Mayotte, Oct 17, 2026 03:18 am (GMT +3) (12 km NW)
All earthquakes at Fani Maoré
Fani Maoré is a submarine volcano about 50 km east of Mayotte. Seismic unrest began in May 2018, and surveys in 2019 discovered a new 800-m-high cone and extensive lava flows on the seafloor.

Flores volcano (Guatemala): 23 earthquakes up to magnitude 3.9

Possible earthquake swarm: 23 earthquakes occurred near (under) the volcano during 18 hours, the last being recorded quake 5 hours ago. Hypocenter depths ranged between 11.00 and 0.70 km.
Earthquake details: (only 5 largest)
3.9 quake 23 km northeast of Cuilapa, Departamento de Santa Rosa, Guatemala, Oct 17, 2026 01:30 am (GMT -6) (14 km WNW)
3.8 quake 24 km northeast of Cuilapa, Departamento de Santa Rosa, Guatemala, Oct 17, 2026 07:30 am (GMT -6) (14 km WNW)
3.0 quake 25 km northeast of Cuilapa, Departamento de Santa Rosa, Guatemala, Oct 17, 2026 07:41 am (GMT -6) (13 km WNW)
2.9 quake 24 km northeast of Cuilapa, Departamento de Santa Rosa, Guatemala, Oct 17, 2026 01:41 am (GMT -6) (14 km WNW)
2.9 quake 25 km northeast of Cuilapa, Departamento de Santa Rosa, Guatemala, Oct 17, 2026 01:31 am (GMT -6) (14 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.

Kilauea volcano (Hawai'i (Big Island)): 8 earthquakes up to magnitude 2.4

8 earthquakes occurred near (under) the volcano during 20 hours, the last being recorded quake 1 hour 3 minutes ago. Hypocenter depths ranged between 41.03 and 0.00 km.
Earthquake details: (only 5 largest)
2.4 quake 37 mi southwest of Hilo, Hawaii County, Hawaii, United States, Oct 17, 2026 12:06 am (GMT -10) (19 km SW)
2.3 quake 36 mi southwest of Hilo, Hawaii County, Hawaii, United States, Oct 16, 2026 11:41 pm (GMT -10) (18 km SW)
2.2 quake 25 mi southwest of Hilo, Hawaii County, Hawaii, United States, Oct 17, 2026 07:31 am (GMT -10) (2 km SE)
2.0 quake 29 mi south of Hilo, Hawaii County, Hawaii, United States, Oct 17, 2026 04:19 am (GMT -10) (13 km SE)
1.8 quake 30 mi south of Hilo, Hawaii County, Hawaii, United States, Oct 16, 2026 12:17 pm (GMT -10) (14 km SSE)
All earthquakes at Kilauea

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

A magnitude 2.5 earthquake occurred at the volcano 19 hours ago. The quake, which might be volcanic in origin, was located at a depth of 5.57 km depth at 15 km distance SE from the volcano.
Earthquake details:
2.5 quake 36 mi southwest of Hilo, Hawaii County, Hawaii, United States, Oct 16, 2026 02:02 pm (GMT -10) (15 km SE)
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.

Orosí volcano (Costa Rica): magnitude 2.2 earthquake

A magnitude 2.2 earthquake occurred at the volcano 7 hours ago. The quake, which might be volcanic in origin, was located at a depth of 19.00 km depth at 17 km distance NW from the volcano.
Earthquake details:
2.2 quake 7.2 km east of La Cruz, Provincia de Guanacaste, Costa Rica, Oct 17, 2026 05:31 am (Costa_Rica time) (17 km NW)
All earthquakes at Orosí
Orosí belongs to an eroded, forested volcanic complex in northwestern Costa Rica. Its last activity is uncertain: mudflows occurred about 3,500 years ago, while reported eruptions in 1844 and 1849 may have come from neighboring Rincón de la Vieja.

Poas volcano (Costa Rica): magnitude 2.8 earthquake

A magnitude 2.8 earthquake occurred at the volcano 13 hours ago. The quake, which might be volcanic in origin, was located at a depth of 12.00 km depth at 15 km distance SW from the volcano.
Earthquake details:
2.8 quake Provincia de Alajuela, 34 km northwest of San Jose, Costa Rica, Oct 16, 2026 11:55 pm (GMT -6) (15 km SW)
All earthquakes at Poas
Poás is an active Costa Rican volcano about 35 km northwest of San José. Its highly acidic Laguna Caliente is the source of frequent steam-driven explosions, including activity recorded during 2025 and 2026.

San Miguel volcano (El Salvador): 2 earthquakes up to magnitude 2.1

2 earthquakes occurred near (under) the volcano at nearly the same time (01:04 UTC). Hypocenter depths ranged between 29.00 and 29.00 km.
Earthquake details:
2.1 quake 14 km southwest of San Miguel, Departamento de San Miguel, El Salvador, Oct 16, 2026 07:04 pm (GMT -6) (3 km SSW)
0.0 quake 14 km southwest of San Miguel, Departamento de San Miguel, El Salvador, 2026-10-16 19:04:09 (3 km SSW)
All earthquakes at San Miguel
San Miguel, or Chaparrastique, is one of El Salvador’s most active volcanoes, with recorded eruptions dating to the early 16th century. Its December 2013 eruption produced an ash plume reaching 9.7 km altitude, while activity through May 2023 included smaller gas-and-ash explosions.

Stepovak Bay 4 volcano (Alaska Peninsula): magnitude 2.4 earthquake

A magnitude 2.4 earthquake occurred at the volcano 6 hours ago. The quake, which might be volcanic in origin, was located at a depth of 8.50 km depth at 4 km distance ESE from the volcano.
Earthquake details:
2.4 quake 48 mi northeast of Sand Point, Aleutians East Borough, Alaska, United States, Oct 17, 2026 04:34 am (GMT -8) (4 km ESE)
All earthquakes at Stepovak Bay 4
https://www.volcanodiscovery.com/earthquakes-volcanoes/news/380221/Volcano-earthquake-report-2026-10-17.html