Volcano earthquake report for Monday, 20 Dec 2021
World map showing volcanoes with shallow (less than 50 km) earthquakes within 20 km radius during the past 24 hours on 20 Dec 2021 Number in brackets indicate nr of quakes.

Quakes detected near: Akyarlar (3 quakes between mag 1.9-2.6), Askja (2 quakes between mag 0.5-1.3), Bardarbunga (17 quakes between mag 0.2-2.1), Clear Lake (31 quakes between mag 0.2-1.8), Coso (7 quakes between mag 0.5-1.0), Etna (2 quakes between mag 1.3-3.0)
Fagradalsfjall (9 quakes between mag 0.1-1.8), Geureudong (1 quake mag 2.9), Herdubreid (3 quakes between mag 0.1-1.5), Hornopiren (1 quake mag 3.0), Hrómundartindur (3 quakes between mag 0.6-1.8), Hualalai (2 quakes between mag 3.0-3.0), Huambo (1 quake mag 3.5), Kilauea (1 quake mag 1.8), Krísuvík (5 quakes between mag 0.2-1.4), La Palma (13 quakes between mag 1.7-2.3), Loihi (1 quake mag 2.8), Loki-Fögrufjöll volcano (4 quakes between mag 0.6-2.5), Maunaloa (1 quake mag 2.2), Piton de la Fournaise (3 quakes between mag 1.2-1.5), Prestahnukur (2 quakes between mag 1.0-1.5), Reykjanes (3 quakes between mag 0.5-1.2), Sabancaya (2 quakes between mag 3.5-3.5), Tjörnes Fracture Zone (2 quakes between mag 1.2-2.3), Utila (1 quake mag 3.0), Vatnafjöll (28 quakes between mag 0.1-1.9) (updated 23h50)

Note: 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.

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


Akyarlar volcano (Turkey): 3 earthquakes up to magnitude 2.6

3 earthquakes occurred near (under) the volcano during 2 hours, the last being recorded quake 7 hours ago. Hypocenter depths ranged between 8.0 and 5.0 km.
Earthquake details:
2.6 quake Aegean Sea, 4.6 km northeast of Kos, Dodecanese, South Aegean, Greece, Dec 20, 2021 6:32 pm (GMT +3) (5 km S)2.5 quake Aegean Sea, 5.6 km northeast of Kos, Dodecanese, South Aegean, Greece, Dec 20, 2021 8:16 pm (GMT +3) (6 km SSE)1.9 quake Aegean Sea, 4 km northwest of Kos, Dodecanese, South Aegean, Greece, Dec 20, 2021 4:49 pm (GMT +2) (8 km SW)All earthquakes at Akyarlar

Bardarbunga volcano (Iceland): 17 earthquakes up to magnitude 2.1

Possible earthquake swarm: 17 earthquakes occurred near (under) the volcano during 12 hours, the last being recorded quake 11 hours ago. Hypocenter depths ranged between 18.6 and 0.1 km.
Earthquake details: (only 5 largest)
2.1 quake Iceland: 4.3 Km SE of Bárðarbunga Dec 20, 2021 1:12 pm (GMT +0) (4 km ESE)1.4 quake Iceland: 3.2 Km SE of Bárðarbunga Dec 20, 2021 7:55 am (GMT +0) (3 km ESE)1.3 quake Iceland: 3.8 Km SSE of Bárðarbunga Dec 20, 2021 2:13 am (GMT +0) (3 km SE)1.0 quake Iceland: 3.8 Km SE of Bárðarbunga Dec 20, 2021 7:55 am (GMT +0) (3 km ESE)0.9 quake Iceland: 16.8 Km ESE of Bárðarbunga Dec 20, 2021 10:45 am (GMT +0) (17 km E)All earthquakes at Bardarbunga

Clear Lake volcano (California): 31 earthquakes up to magnitude 1.8

Possible earthquake swarm: 31 earthquakes occurred near (under) the volcano during 20 hours, the last being recorded quake 1 hour 57 minutes ago. Hypocenter depths ranged between 3.6 and 0.3 km.
Earthquake details: (only 5 largest)
1.8 quake 8km W of Cobb, CA, Dec 20, 2021 12:18 pm (GMT -8) (16 km SSW)1.5 quake 6km NW of The Geysers, CA, Dec 20, 2021 1:21 pm (GMT -8) (17 km S)1.3 quake 3km NE of The Geysers, CA, Dec 20, 2021 12:41 am (GMT -8) (19 km S)1.2 quake 6km W of Cobb, CA, Dec 19, 2021 11:06 pm (GMT -8) (16 km S)1.2 quake 7km NW of The Geysers, CA, Dec 20, 2021 1:21 am (GMT -8) (16 km SSW)All earthquakes at Clear Lake

Etna volcano (Italy): 2 earthquakes up to magnitude 3.0

2 earthquakes occurred near (under) the volcano during 9 hours, the last being recorded quake 6 hours ago. Hypocenter depths ranged between 10.0 and 0.0 km.
Earthquake details:
Reported seismic-like event (likely no quake): 30 km north of Catania, Sicily, Italy, Dec 20, 2021 7:09 pm (GMT +1) (0 km SW)1.3 quake Sicily, Italy, Dec 20, 2021 10:24 am (GMT +1) (17 km S)All earthquakes at Etna

Geureudong volcano (Sumatra): magnitude 2.9 earthquake

A magnitude 2.9 earthquake occurred at the volcano 2 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 13 km distance NNE from the volcano.
Earthquake details:
2.9 quake 46 km southwest of Lhokseumawe, Aceh, Indonesia, Dec 21, 2021 4:45 am (GMT +7) (13 km NNE)All earthquakes at Geureudong

Hornopiren volcano (Southern Chile and Argentina): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 2 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 11 km distance SSW from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): Provincia de Palena, 68 km southeast of Puerto Montt, Provincia de Llanquihue, Los Lagos, Chile, Dec 20, 2021 6:29 pm (GMT -3) (11 km SSW)All earthquakes at Hornopiren

Hualalai volcano (Hawai'i (Big Island)): 2 earthquakes up to magnitude 3.0

2 earthquakes occurred near (under) the volcano during 23 minutes, the last being recorded quake 1 hour 7 minutes ago. Hypocenter depths ranged between 10.0 and 10.0 km.
Earthquake details:
Reported seismic-like event (likely no quake): 3.8 mi southeast of Kailua-Kona, Hawaii County, USA, Dec 20, 2021 12:43 pm (GMT -10) (15 km SW)Reported seismic-like event (likely no quake): 2.6 mi northeast of Kailua-Kona, Hawaii County, USA, Dec 20, 2021 12:20 pm (GMT -10) (11 km WSW)All earthquakes at Hualalai

Huambo volcano (Peru): magnitude 3.5 earthquake

A magnitude 3.5 earthquake occurred at the volcano 18 hours ago. The quake, which might be volcanic in origin, was located at a depth of 11.0 km depth at 18 km distance NNE from the volcano.
Earthquake details:
3.5 quake Provincia de Caylloma, 96 km northwest of Arequipa, Peru, Dec 20, 2021 12:28 am (GMT -5) (18 km NNE)All earthquakes at Huambo

La Palma volcano (Canary Islands): 13 earthquakes up to magnitude 2.3

Possible earthquake swarm: 13 earthquakes occurred near (under) the volcano during 23 hours, the last being recorded quake 38 minutes ago. Hypocenter depths ranged between 35.6 and 6.0 km.
Earthquake details: (only 5 largest)
2.3 quake La Palma Island, 11 km south of Los Llanos de Aridane, Spain, Dec 20, 2021 12:53 am (GMT +0) (6 km WSW)2.1 quake La Palma Island, 10.4 km southeast of Los Llanos de Aridane, Spain, Dec 20, 2021 7:16 pm (GMT +0) (3 km NNE)2.0 quake La Palma Island, 13 km southeast of Los Llanos de Aridane, Spain, Dec 20, 2021 7:00 pm (GMT +0) (2 km S)2.0 quake La Palma Island, 12 km southeast of Los Llanos de Aridane, Spain, Dec 20, 2021 6:02 am (GMT +0) (3 km SW)2.0 quake La Palma Island, 14 km southeast of Los Llanos de Aridane, Spain, Dec 19, 2021 11:54 pm (GMT +0) (3 km S)All earthquakes at La Palma

Loihi volcano (Hawai'i (Big Island)): magnitude 2.8 earthquake

A magnitude 2.8 earthquake occurred at the volcano 19 hours ago. The quake, which might be volcanic in origin, was located at a depth of 5.6 km depth at 16 km distance S from the volcano.
Earthquake details:
2.8 quake North Pacific Ocean, 39 mi southeast of Hawaiian Ocean View, Hawaii County, USA, Dec 19, 2021 7:05 pm (GMT -10) (16 km S)All earthquakes at Loihi

Loki-Fögrufjöll volcano volcano (Iceland): 4 earthquakes up to magnitude 2.5

4 earthquakes occurred near (under) the volcano during 9 hours, the last being recorded quake 10 hours ago. Hypocenter depths ranged between 8.7 and 1.8 km.
Earthquake details:
2.5 quake Iceland: 10.4 Km E of Hamarinn Dec 20, 2021 1:07 pm (GMT +0) (10 km ENE)2.3 quake Iceland: 9.5 Km ENE of Hamarinn Dec 20, 2021 1:26 pm (GMT +0) (9 km ENE)1.1 quake Iceland: 9.8 Km ENE of Hamarinn Dec 20, 2021 5:19 am (GMT +0) (10 km ENE)0.6 quake Iceland: 9.3 Km ENE of Hamarinn Dec 20, 2021 1:50 pm (GMT +0) (9 km ENE)All earthquakes at Loki-Fögrufjöll volcano

Maunaloa volcano (Hawai'i (Big Island)): magnitude 2.2 earthquake

A magnitude 2.2 earthquake occurred at the volcano 23 hours ago. The quake, which might be volcanic in origin, was located at a depth of 0.9 km depth at 5 km distance S from the volcano.
Earthquake details:
2.2 quake 26 Km E of Honaunau-Napoopoo, Hawaii, Dec 19, 2021 2:53 pm (GMT -10) (5 km S)All earthquakes at Maunaloa

Sabancaya volcano (Peru): 2 earthquakes up to magnitude 3.5

2 earthquakes occurred near (under) the volcano during 4 hours, the last being recorded quake 13 hours ago. Hypocenter depths ranged between 12.0 and 10.0 km.
Earthquake details:
3.5 quake Provincia de Caylloma, 89 km north of Arequipa, Peru, Dec 20, 2021 5:51 am (GMT -5) (16 km NNE)3.5 quake Provincia de Caylloma, 89 km north of Arequipa, Peru, Dec 20, 2021 1:47 am (GMT -5) (16 km NNE)All earthquakes at Sabancaya

Tjörnes Fracture Zone volcano (Iceland): 2 earthquakes up to magnitude 2.3

2 earthquakes occurred near (under) the volcano during 21 hours, the last being recorded quake 1 hour 27 minutes ago. Hypocenter depths ranged between 12.1 and 5.1 km.
Earthquake details:
2.3 quake Iceland: 35.5 Km WNW of Kópasker Dec 20, 2021 12:59 am (GMT +0) (14 km NNW)1.2 quake Iceland: 13.9 Km W of Kópasker Dec 20, 2021 10:23 pm (GMT +0) (15 km E)All earthquakes at Tjörnes Fracture Zone

Utila volcano (Honduras): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 20 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 3 km distance NE from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): Islas de la Bahia, 42 km north of La Ceiba, Departamento de Atlantida, Honduras, Dec 19, 2021 9:51 pm (GMT -6) (3 km NE)All earthquakes at Utila

Vatnafjöll volcano (Iceland): 28 earthquakes up to magnitude 1.9

Possible earthquake swarm: 28 earthquakes occurred near (under) the volcano during 13 hours, the last being recorded quake 9 hours ago. Hypocenter depths ranged between 9.9 and 3.8 km.
Earthquake details: (only 5 largest)
1.9 quake Iceland: 2.3 Km S of Vatnafjöll Dec 20, 2021 12:42 pm (GMT +0) (3 km SSE)1.6 quake Iceland: 2.4 Km SSW of Vatnafjöll Dec 20, 2021 1:01 pm (GMT +0) (3 km S)1.5 quake Iceland: 2.3 Km S of Vatnafjöll Dec 20, 2021 12:57 pm (GMT +0) (3 km SSE)1.3 quake Iceland: 2.6 Km SSW of Vatnafjöll Dec 20, 2021 1:01 pm (GMT +0) (3 km S)1.2 quake Iceland: 0.9 Km S of Vatnafjöll Dec 20, 2021 12:18 pm (GMT +0) (2 km SE)All earthquakes at Vatnafjöll
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