Volcano earthquake report for Sunday, 25 Apr 2021
World map showing volcanoes with shallow (less than 20 km) earthquakes within 20 km radius during the past 24 hours on 25 Apr 2021 Number in brackets indicate nr of quakes.

Quakes detected near: Bardarbunga (10 quakes between mag 0.1-1.4), Buzzard Creek (1 quake mag 1.2), Cabalian (1 quake mag 3.0), Clear Lake (26 quakes between mag 0.3-1.7), Coso (6 quakes between mag 1.0-1.7), Fagradalsfjall (30 quakes between mag 0.2-1.5)
Grímsnes (3 quakes between mag 0.1-1.4), Grímsvötn (12 quakes between mag 0.1-2.4), Hengill (3 quakes between mag 0.5-1.3), Hrómundartindur (1 quake mag 1.4), Kalatungan (1 quake mag 2.6), Kilauea (2 quakes between mag 1.8-1.9), Krísuvík (22 quakes between mag 0.1-2.8), Loki-Fögrufjöll volcano (2 quakes between mag 0.8-1.3), Maroa (1 quake mag 1.6), Maunaloa (2 quakes between mag 2.6-2.8), Morne aux Diables (1 quake mag 2.5), Nevados Casiri (1 quake mag 4.3), Nisyros (24 quakes between mag 1.4-3.6), Ranakah (1 quake mag 3.3), Reykjanes (7 quakes between mag 0.1-1.0), Salton Buttes (2 quakes between mag 1.3-1.5), San Cristobal (8 quakes between mag 1.8-3.5), Sibayak (1 quake mag 2.5), Sousaki (2 quakes between mag 1.8-2.0) (updated 22h50)

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:


Cabalian volcano (Central Philippines): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 4 hours ago. The quake, which might be volcanic in origin, was located at a depth of 5.0 km depth at 19 km distance NNW from the volcano.
Earthquake details:
3.0 quake Southern Leyte, 37 km southeast of Abuyog, Philippines, 26 April 2021 - 03:12 AM (PST) (19 km NNW)All earthquakes at Cabalian

Clear Lake volcano (California): 26 earthquakes up to magnitude 1.7

Possible earthquake swarm: 26 earthquakes occurred near (under) the volcano during 20 hours, the last being recorded quake 4 hours ago. Hypocenter depths ranged between 5.0 and 0.7 km.
Earthquake details: (only 5 largest)
1.7 quake 8km NW of The Geysers, CA, USA, 25 April 2021 00:15 GMT (16 km SSW)1.6 quake 6km NW of The Geysers, CA, USA, 25 April 2021 17:00 GMT (17 km S)1.3 quake 7km NW of The Geysers, CA, USA, 25 April 2021 18:23 GMT (18 km SSW)1.2 quake 7km NW of The Geysers, CA, USA, 25 April 2021 00:06 GMT (18 km SSW)1.1 quake 8km NW of The Geysers, CA, USA, 25 April 2021 09:45 GMT (16 km SSW)All earthquakes at Clear Lake

Fagradalsfjall volcano (Reykjanes Peninsula, Iceland): 30 earthquakes up to magnitude 1.5

Possible earthquake swarm: 30 earthquakes occurred near (under) the volcano during 22 hours, the last being recorded quake 1 hour 24 minutes ago. Hypocenter depths ranged between 7.4 and 0.1 km.
Earthquake details: (only 5 largest)
1.5 quake 5.2 Km NNE of Grindavík, Iceland, 25 April 2021 08:35 GMT (6 km WSW)1.4 quake 4.9 Km NNE of Grindavík, Iceland, 25 April 2021 12:24 GMT (6 km WSW)1.3 quake 4.6 Km NNE of Grindavík, Iceland, 25 April 2021 21:26 GMT (6 km WSW)1.0 quake 5.0 Km NNE of Grindavík, Iceland, 25 April 2021 14:30 GMT (6 km WSW)1.0 quake 4.7 Km NNE of Grindavík, Iceland, 25 April 2021 12:55 GMT (6 km WSW)All earthquakes at Fagradalsfjall

Grímsvötn volcano (Iceland): 12 earthquakes up to magnitude 2.4

Possible earthquake swarm: 12 earthquakes occurred near (under) the volcano during 15 hours, the last being recorded quake 32 minutes ago. Hypocenter depths ranged between 10.1 and 2.0 km.
Earthquake details: (only 5 largest)
2.4 quake 2.8 Km WSW of Grímsfjall, Iceland, 25 April 2021 13:21 GMT (3 km S)1.8 quake 2.9 Km WSW of Grímsfjall, Iceland, 25 April 2021 13:36 GMT (3 km S)1.6 quake 3.2 Km WSW of Grímsfjall, Iceland, 25 April 2021 13:20 GMT (3 km S)1.0 quake 9.5 Km SW of Grímsfjall, Iceland, 25 April 2021 06:56 GMT (9 km SSW)0.8 quake 3.1 Km SW of Grímsfjall, Iceland, 25 April 2021 13:20 GMT (4 km S)All earthquakes at Grímsvötn

Kalatungan volcano (Mindanao): magnitude 2.6 earthquake

A magnitude 2.6 earthquake occurred at the volcano 10 hours ago. The quake, which might be volcanic in origin, was located at a depth of 5.0 km depth at 10 km distance S from the volcano.
Earthquake details:
2.6 quake Province of Bukidnon, Northern Mindanao, 25 km northeast of Wao, Philippines, 25 April 2021 - 09:14 PM (PST) (10 km S)All earthquakes at Kalatungan

Krísuvík volcano (Reykjanes Peninsula, Iceland): 22 earthquakes up to magnitude 2.8

Possible earthquake swarm: 22 earthquakes occurred near (under) the volcano during 16 hours, the last being recorded quake 7 hours ago. Hypocenter depths ranged between 7.2 and 1.3 km.
Earthquake details: (only 5 largest)
2.8 quake 4.2 Km N of Krýsuvík, Iceland, 25 April 2021 14:34 GMT (1 km ESE)1.1 quake 4.0 Km N of Krýsuvík, Iceland, 25 April 2021 14:29 GMT (2 km ESE)1.1 quake 3.8 Km NE of Krýsuvík, Iceland, 25 April 2021 05:14 GMT (5 km ESE)1.0 quake 1.6 Km S of Keilir, Iceland, 25 April 2021 15:10 GMT (4 km W)0.9 quake 3.3 Km NE of Krýsuvík, Iceland, 25 April 2021 02:32 GMT (5 km ESE)All earthquakes at Krísuvík

Maunaloa volcano (Hawai'i (Big Island)): 2 earthquakes up to magnitude 2.8

2 earthquakes occurred near (under) the volcano during 19 hours, the last being recorded quake 1 hour 34 minutes ago. Hypocenter depths ranged between 3.7 and 0.8 km.
Earthquake details:
2.8 quake 40 mi southwest of Hilo, Hawaii County, USA, 25 April 2021 21:16 GMT (6 km WNW)2.6 quake 22 Km E of Honaunau-Napoopoo, Hawaii, USA, 25 April 2021 02:12 GMT (5 km WSW)All earthquakes at Maunaloa

Morne aux Diables volcano (Caribbean): magnitude 2.5 earthquake

A magnitude 2.5 earthquake occurred at the volcano 7 hours ago. The quake, which might be volcanic in origin, was located at a depth of 8.3 km depth at 11 km distance NW from the volcano.
Earthquake details:
2.5 quake Caribbean Sea, 44 km north of Roseau, Saint George, Dominica, 25 April 2021 16:15 GMT (11 km NW)All earthquakes at Morne aux Diables

Nevados Casiri volcano (Peru): magnitude 4.3 earthquake

A magnitude 4.3 earthquake occurred at the volcano 10 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 13 km distance NW from the volcano.
Earthquake details:
4.3 quake Provincia de Tarata, 77 km northeast of Tacna, Peru, 25 Apr 7:56 am (GMT -5) (13 km NW)All earthquakes at Nevados Casiri

Nisyros volcano (Greece): 24 earthquakes up to magnitude 3.6

Possible earthquake swarm: 24 earthquakes occurred near (under) the volcano during 23 hours, the last being recorded quake 30 minutes ago. Hypocenter depths ranged between 19.5 and 1.5 km.
Earthquake details: (only 5 largest)
3.6 quake Aegean Sea, 53 km south of Kos Town, Dodecanese, South Aegean, Greece, 25 April 2021 01:46 GMT (19 km S)3.3 quake Aegean Sea, 54 km south of Kos Town, Dodecanese, South Aegean, Greece, 25 April 2021 22:19 GMT (18 km S)2.4 quake Aegean Sea, 52 km south of Kos Town, Dodecanese, South Aegean, Greece, 25 April 2021 20:54 GMT (16 km S)2.3 quake Aegean Sea, 50 km south of Kos Town, Dodecanese, South Aegean, Greece, 25 April 2021 04:43 GMT (13 km SSW)2.1 quake Aegean Sea, 53 km south of Kos Town, Dodecanese, South Aegean, Greece, 25 April 2021 09:47 GMT (17 km S)All earthquakes at Nisyros

Ranakah volcano (Flores): magnitude 3.3 earthquake

A magnitude 3.3 earthquake occurred at the volcano 8 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 2 km distance E from the volcano.
Earthquake details:
3.3 quake 8.4 km east of Ruteng, Kabupaten Manggarai, East Nusa Tenggara, Indonesia, 25 April 2021 14:21 GMT (2 km E)All earthquakes at Ranakah

San Cristobal volcano (Nicaragua): 8 earthquakes up to magnitude 3.5

8 earthquakes occurred near (under) the volcano during 18 hours, the last being recorded quake 2 hours ago. Hypocenter depths ranged between 11.0 and 7.0 km.
Earthquake details: (only 5 largest)
3.5 quake 12 km north of Chinandega, Nicaragua, 2021-04-25 05:32:55 (14 km WNW)2.6 quake 11 km north of Chinandega, Nicaragua, 2021-04-25 14:26:17 (14 km W)2.6 quake 13 km north of Chinandega, Nicaragua, 2021-04-25 04:45:07 (15 km WNW)2.2 quake 12 km north of Chinandega, Nicaragua, 2021-04-24 22:54:08 (14 km WNW)2.1 quake 10.7 km north of Chinandega, Nicaragua, 2021-04-25 07:22:40 (15 km W)All earthquakes at San Cristobal

Sibayak volcano (Sumatra): magnitude 2.5 earthquake

A magnitude 2.5 earthquake occurred at the volcano 17 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 16 km distance SSE from the volcano.
Earthquake details:
2.5 quake 4.5 km east of Kabanjahe, North Sumatra, Indonesia, 25 April 2021 05:50 GMT (16 km SSE)All earthquakes at Sibayak
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