Volcano earthquake report for Wednesday, 21 Jul 2021
World map showing volcanoes with shallow (less than 20 km) earthquakes within 20 km radius during the past 24 hours on 21 Jul 2021 Number in brackets indicate nr of quakes.

Quakes detected near: Akyarlar (1 quake mag 1.4), Askja (3 quakes between mag 0.6-2.1), Brennisteinsfjöll (2 quakes between mag 0.9-1.0), Clear Lake (18 quakes between mag 0.4-2.2), Colima (1 quake mag 4.0), Coso (5 quakes between mag 0.5-1.0)
Etna (1 quake mag 1.5), Ilopango (1 quake mag 1.6), Irazu (1 quake mag 3.0), Kilauea (11 quakes between mag 1.8-2.5), Krísuvík (3 quakes between mag 0.1-1.1), Mono Lake (1 quake mag 1.2), Mount Rainier (2 quakes between mag 0.5-1.6), Nisyros (3 quakes between mag 2.0-2.3), Paricutín (Michoacán-Guanajuato) (3 quakes between mag 3.5-3.6), Redoubt (1 quake mag 1.2), Ruapehu (1 quake mag 1.0), San Vicente (1 quake mag 1.9), Takawangha (2 quakes between mag 0.2-4.3), Taupo (1 quake mag 2.0) (updated 19h50)

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:


Askja volcano (Iceland): 3 earthquakes up to magnitude 2.1

3 earthquakes occurred near (under) the volcano during 10 hours, the last being recorded quake 9 hours ago. Hypocenter depths ranged between 10.2 and 3.8 km.
Earthquake details:
2.1 quake Iceland: 3.4 Km WSW of Dreki 21 July 2021 11:04 GMT (4 km E)0.8 quake Iceland: 3.8 Km W of Dreki 21 July 2021 00:42 GMT (3 km ENE)0.6 quake Iceland: 8.3 Km WNW of Dreki 21 July 2021 00:42 GMT (4 km NNW)All earthquakes at Askja

Clear Lake volcano (California): 18 earthquakes up to magnitude 2.2

Possible earthquake swarm: 18 earthquakes occurred near (under) the volcano during 23 hours, the last being recorded quake 23 minutes ago. Hypocenter depths ranged between 3.6 and 0.1 km.
Earthquake details: (only 5 largest)
2.2 quake 2km SW of Cobb, CA, 21 July 2021 10:05 GMT (18 km S)1.7 quake 6km WNW of The Geysers, CA, 21 July 2021 09:14 GMT (19 km S)1.5 quake 4km NW of The Geysers, CA, 21 July 2021 08:45 GMT (18 km S)1.1 quake 7km NW of The Geysers, CA, 21 July 2021 18:58 GMT (17 km SSW)1.0 quake 7km NW of The Geysers, CA, 20 July 2021 21:22 GMT (18 km SSW)All earthquakes at Clear Lake

Colima volcano (Western & Central Mexico): magnitude 4.0 earthquake

A magnitude 4.0 earthquake occurred at the volcano 22 hours ago. The quake, which might be volcanic in origin, was located at a depth of 5.0 km depth at 5 km distance NW from the volcano.
Earthquake details:
4.0 quake 34 km north of Colima, Mexico, 2021-07-20 17:15:35 (Hora de México) (5 km NW)All earthquakes at Colima

Irazu volcano (Costa Rica): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 10 hours ago. The quake, which might be volcanic in origin, was located at a depth of 11.0 km depth at 18 km distance SW from the volcano.
Earthquake details:
3.0 quake Cartago, Provincia de Cartago, 13 km southeast of San Jose, Costa Rica, 2021-07-21 04:18:50 (18 km SW)All earthquakes at Irazu

Kilauea volcano (Hawai'i (Big Island)): 11 earthquakes up to magnitude 2.5

Possible earthquake swarm: 11 earthquakes occurred near (under) the volcano during 21 hours, the last being recorded quake 12 minutes ago. Hypocenter depths ranged between 6.5 and 0.7 km.
Earthquake details: (only 5 largest)
2.5 quake 6 Km S of Volcano, Hawaii, 21 July 2021 04:13 GMT (6 km ESE)2.3 quake 5 Km SSW of Volcano, Hawaii, 21 July 2021 01:48 GMT (4 km ESE)2.2 quake 10 Km SE of Volcano, Hawaii, 21 July 2021 13:04 GMT (13 km ESE)2.1 quake 16 Km NNE of Pāhala, Hawaii, 21 July 2021 15:14 GMT (16 km WSW)2.0 quake 5 Km SW of Volcano, Hawaii, 21 July 2021 19:37 GMT (1 km E)All earthquakes at Kilauea

Nisyros volcano (Greece): 3 earthquakes up to magnitude 2.3

3 earthquakes occurred near (under) the volcano during 18 hours, the last being recorded quake 5 hours ago. Hypocenter depths ranged between 14.7 and 5.4 km.
Earthquake details:
2.3 quake Aegean Sea, 58 km south of Kos Town, Dodecanese, South Aegean, Greece, 20 July 2021 20:52 GMT (19 km S)2.1 quake Aegean Sea, 54 km south of Kos Town, Dodecanese, South Aegean, Greece, 21 July 2021 15:03 GMT (18 km S)2.0 quake Aegean Sea, 88 km west of Rhodes, Dodecanese, South Aegean, Greece, 21 July 2021 07:11 GMT (19 km SSE)All earthquakes at Nisyros

Paricutín (Michoacán-Guanajuato) volcano (Western & Central Mexico): 3 earthquakes up to magnitude 3.6

3 earthquakes occurred near (under) the volcano during 3 hours, the last being recorded quake 10 hours ago. Hypocenter depths ranged between 13.0 and 9.0 km.
Earthquake details:
3.6 quake 25 km northwest of Uruapan, Michoacan, Mexico, 2021-07-21 03:25:16 (Hora de México) (18 km NE)3.5 quake Nuevo Parangaricutiro, 18 km west of Uruapan, Michoacan, Mexico, 2021-07-21 01:57:23 (Hora de México) (4 km SE)3.5 quake 22 km northwest of Uruapan, Michoacan, Mexico, 2021-07-21 04:55:19 (Hora de México) (16 km NE)All earthquakes at Paricutín (Michoacán-Guanajuato)

Takawangha volcano (Aleutian Islands): 2 earthquakes up to magnitude 4.3

2 earthquakes occurred near (under) the volcano during 14 hours, the last being recorded quake 9 hours ago. Hypocenter depths ranged between 2.6 and 1.8 km.
Earthquake details:
4.3 quake 55 mi west of adak alaska, Aleutians West, Alaska, USA, 21 Jul 2:03 am (GMT -9) (10 km SE)0.2 quake 81 Km W of Adak, Alaska, 20 July 2021 21:19 GMT (13 km E)All earthquakes at Takawangha
https://www.volcanodiscovery.com/earthquakes-volcanoes/news/135952/Volcano-earthquake-report-for-Wednesday-21-Jul-2021.html