Volcano earthquake report for Sunday, 29 Aug 2021
World map showing volcanoes with shallow (less than 20 km) earthquakes within 20 km radius during the past 24 hours on 29 Aug 2021 Number in brackets indicate nr of quakes.

Quakes detected near: Clear Lake (30 quakes between mag 0.3-2.9), Eldey (5 quakes between mag 0.9-1.7), Etna (1 quake mag 1.2), Grímsnes (9 quakes between mag 0.4-1.2), Gunung Semuning (Ranau caldera) (1 quake mag 2.9), Herdubreid (2 quakes between mag 0.7-1.9)
Kilauea (76 quakes between mag 0.2-2.9), Kolumbo (1 quake mag 2.2), Krísuvík (2 quakes between mag 0.3-1.2), Long Valley (3 quakes between mag 0.4-1.4), Maunaloa (1 quake mag 3.0), Mayotte Island (1 quake mag 1.8), Methana (1 quake mag 1.4), Montagu Island (1 quake mag 3.0), Mount St. Helens (1 quake mag 2.2), Papandayan (1 quake mag 1.9), Salton Buttes (1 quake mag 1.3), San Cristobal (1 quake mag 2.4), San Jorge (1 quake mag 2.3), Santorini (1 quake mag 1.9), Spurr (1 quake mag 2.0), Tambora (1 quake mag 2.6), Taupo (4 quakes between mag 1.0-3.0), Tenorio (2 quakes between mag 1.3-3.3), Tjörnes Fracture Zone (2 quakes between mag 0.6-1.2), Ubehebe Craters (1 quake mag 1.4) (updated 23h50)

Note: Earthquakes within 20 km from and at depths less than 20 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.

Volcanoes with recent earthquakes above magnitude 2 or more than 10 quakes are listed below:


Clear Lake volcano (California): 30 earthquakes up to magnitude 2.9

Possible earthquake swarm: 30 earthquakes occurred near (under) the volcano during 22 hours, the last being recorded quake 1 hour 8 minutes ago. Hypocenter depths ranged between 3.5 and 0.0 km.
Earthquake details: (only 5 largest)
2.9 quake 11 mi southwest of Clearlake, Lake County, California, USA, Aug 29, 2021 12:56 pm (GMT -7) (16 km S)2.0 quake 3km WNW of Cobb, CA, Aug 29, 2021 12:57 pm (GMT -7) (16 km S)2.0 quake 7km NW of The Geysers, CA, Aug 29, 2021 1:09 am (GMT -7) (16 km SSW)1.9 quake 3km WNW of Cobb, CA, Aug 29, 2021 1:47 pm (GMT -7) (15 km S)1.6 quake 3km WNW of Cobb, CA, Aug 29, 2021 3:30 pm (GMT -7) (16 km S)All earthquakes at Clear Lake

Gunung Semuning (Ranau caldera) volcano (Sumatra): magnitude 2.9 earthquake

A magnitude 2.9 earthquake occurred at the volcano 5 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 7 km distance NNW from the volcano.
Earthquake details:
2.9 quake 84 km south of Baturaja, Sumatra Kidul, Indonesia, Aug 30, 2021 2:06 am (GMT +7) (7 km NNW)All earthquakes at Gunung Semuning (Ranau caldera)

Kilauea volcano (Hawai'i (Big Island)): 76 earthquakes up to magnitude 2.9

Possible earthquake swarm: 76 earthquakes occurred near (under) the volcano during 23 hours, the last being recorded quake 49 minutes ago. Hypocenter depths ranged between 6.3 and 0.1 km.
Earthquake details: (only 5 largest)
2.9 quake 31 mi southwest of Hilo, Hawaii County, USA, Aug 29, 2021 3:30 am (GMT -10) (8 km SSW)2.6 quake 30 mi southwest of Hilo, Hawaii County, USA, Aug 29, 2021 12:10 am (GMT -10) (7 km SSW)2.3 quake 10 Km SW of Volcano, Hawaii, Aug 29, 2021 8:09 am (GMT -10) (5 km S)2.2 quake 6 Km SW of Volcano, Hawaii, Aug 28, 2021 2:20 pm (GMT -10) (1 km SE)2.2 quake 14 Km SW of Volcano, Hawaii, Aug 28, 2021 8:29 pm (GMT -10) (9 km SSW)All earthquakes at Kilauea

Kolumbo volcano (Greece): magnitude 2.2 earthquake

A magnitude 2.2 earthquake occurred at the volcano 22 hours ago. The quake, which might be volcanic in origin, was located at a depth of 13.3 km depth at 3 km distance WNW from the volcano.
Earthquake details:
2.2 quake Aegean Sea, 10.4 km northeast of Oia, Kykladene, South Aegean, Greece, Aug 29, 2021 4:39 am (GMT +3) (3 km WNW)All earthquakes at Kolumbo

Maunaloa volcano (Hawai'i (Big Island)): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 12 hours ago. The quake, which might be volcanic in origin, was located at a depth of 5.1 km depth at 8 km distance E from the volcano.
Earthquake details:
3.0 quake 34 mi southwest of Hilo, Hawaii County, USA, Aug 29, 2021 1:58 am (GMT -10) (8 km E)All earthquakes at Maunaloa

Montagu Island volcano (South Sandwich Islands): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 1 hour 28 minutes ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 5 km distance SSW from the volcano.
Earthquake details:
Reported (unconfirmed) quake or seismic-like event: South Georgia & South Sandwich Islands Aug 29, 2021 8:22 pm (GMT -2) (5 km SSW)All earthquakes at Montagu Island

Mount St. Helens volcano (Washington): magnitude 2.2 earthquake

A magnitude 2.2 earthquake occurred at the volcano 6 hours ago. The quake, which might be volcanic in origin, was located at a depth of 1.7 km depth at 1 km distance SW from the volcano.
Earthquake details:
2.2 quake 37 Km NNE of Amboy, Washington, Aug 29, 2021 10:57 am (GMT -7) (1 km SW)All earthquakes at Mount St. Helens

San Cristobal volcano (Nicaragua): magnitude 2.4 earthquake

A magnitude 2.4 earthquake occurred at the volcano 12 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 18 km distance W from the volcano.
Earthquake details:
2.4 quake 9.9 km north of Chinandega, Nicaragua, Aug 29, 2021 6:01 am (GMT -6) (18 km W)All earthquakes at San Cristobal

San Jorge volcano (Azores): magnitude 2.3 earthquake

A magnitude 2.3 earthquake occurred at the volcano 21 hours ago. The quake, which might be volcanic in origin, was located at a depth of 0 km depth at 10 km distance SSW from the volcano.
Earthquake details:
2.3 quake North Atlantic Ocean, 10.7 km west of Calheta, Azoren, Portugal, Aug 29, 2021 2:34 am (GMT +0) (10 km SSW)All earthquakes at San Jorge

Tambora volcano (Sumbawa): magnitude 2.6 earthquake

A magnitude 2.6 earthquake occurred at the volcano 12 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 8 km distance SSE from the volcano.
Earthquake details:
2.6 quake 53 km northwest of Dompu, West Nusa Tenggara, Indonesia, Aug 29, 2021 7:35 pm (GMT +8) (8 km SSE)All earthquakes at Tambora

Taupo volcano (New Zealand): 4 earthquakes up to magnitude 3.0

4 earthquakes occurred near (under) the volcano during 23 hours, the last being recorded quake 22 minutes ago. Hypocenter depths ranged between 10.0 and 4.7 km.
Earthquake details:
Reported (unconfirmed) quake or seismic-like event: 1.1 km east of Taupo, Waikato, New Zealand, Aug 30, 2021 11:27 am (GMT +12) (17 km NNE)2.3 quake 21 km southwest of Taupo, Waikato, New Zealand, Aug 30, 2021 5:47 am (GMT +12) (4 km SW)1.1 quake New Zealand Aug 29, 2021 12:33 pm (GMT +12) (19 km W)1.0 quake New Zealand Aug 30, 2021 3:48 am (GMT +12) (16 km WNW)All earthquakes at Taupo

Tenorio volcano (Costa Rica): 2 earthquakes up to magnitude 3.3

2 earthquakes occurred near (under) the volcano at nearly the same time (18:09 UTC). Hypocenter depths ranged between 8.0 and 5.0 km.
Earthquake details:
3.3 quake 28 km north of Canas, Cañas, Provincia de Guanacaste, Costa Rica, Aug 29, 2021 12:09 pm (GMT -6) (2 km SE)1.3 quake 39 Km Al Sureste De Cuatro Bocas, Costa Rica, Aug 29, 2021 12:09 pm (GMT -6) (7 km E)All earthquakes at Tenorio
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