Volcano earthquake report for Tuesday, 7 Sep 2021
World map showing volcanoes with shallow (less than 20 km) earthquakes within 20 km radius during the past 24 hours on 7 Sep 2021 Number in brackets indicate nr of quakes.

Quakes detected near: Apo (1 quake mag 2.8), Askja (19 quakes between mag 0.1-1.7), Campi Flegrei (Phlegrean Fields) (1 quake mag 3.0), Clear Lake (40 quakes between mag 0.4-2.1), Coso (3 quakes between mag 0.4-1.2), Etna (1 quake mag 1.2)
Hijiori (1 quake mag 3.0), Hrómundartindur (5 quakes between mag 0.4-1.2), Irazu (1 quake mag 2.2), Iya (1 quake mag 3.3), Kilauea (2 quakes between mag 2.0-2.1), Kolumbo (1 quake mag 2.1), Krísuvík (1 quake mag 1.5), Loihi (1 quake mag 3.6), Maroa (1 quake mag 1.7), Maunaloa (1 quake mag 1.9), Mono Craters (1 quake mag 1.3), Mount Rainier (4 quakes between mag 0.1-1.3), Nisyros (9 quakes between mag 1.5-3.9), Paricutín (Michoacán-Guanajuato) (1 quake mag 3.9), Salton Buttes (3 quakes between mag 1.2-1.6), Tenerife (2 quakes between mag 0.9-1.6), Thordarhyrna (1 quake mag 1.1), Tjörnes Fracture Zone (1 quake mag 1.4), Torfajökull (1 quake mag 1.0), Vatnafjöll (2 quakes between mag 0.6-1.0), Vesuvius (2 quakes between mag 0.3-1.4) (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:


Apo volcano (Mindanao): magnitude 2.8 earthquake

A magnitude 2.8 earthquake occurred at the volcano 8 hours ago. The quake, which might be volcanic in origin, was located at a depth of 15.0 km depth at 18 km distance ENE from the volcano.
Earthquake details:
2.8 quake 22 km west of Davao City, Province of Davao del Sur, Philippines, Sep 8, 2021 12:10 am (GMT +8) (18 km ENE)All earthquakes at Apo
Apo volcano (2938 m) on Mindanao forms the highest peak of the Philippines. Its volcanic history is not well known, but although there are no historic eruptions it is considered to be active.

The volcano has an extensive hydrothermal field with ongoing geothermal exploration. Small shallow earthquakes related to this activity are common.

Askja volcano (Iceland): 19 earthquakes up to magnitude 1.7

Possible earthquake swarm: 19 earthquakes occurred near (under) the volcano during 21 hours, the last being recorded quake 3 hours ago. Hypocenter depths ranged between 6.0 and 1.1 km.
Earthquake details: (only 5 largest)
1.7 quake Iceland: 4.8 Km SW of Dreki Sep 7, 2021 8:31 pm (GMT +0) (4 km ESE)1.3 quake Iceland: 4.1 Km WSW of Dreki Sep 7, 2021 1:45 am (GMT +0) (3 km ESE)1.2 quake Iceland: 3.5 Km WSW of Dreki Sep 7, 2021 7:02 pm (GMT +0) (4 km E)0.9 quake Iceland: 4.7 Km WSW of Dreki Sep 7, 2021 11:46 am (GMT +0) (3 km ESE)0.9 quake Iceland: 1.2 Km ENE of Dreki Sep 7, 2021 12:00 am (GMT +0) (8 km E)All earthquakes at Askja

Campi Flegrei (Phlegrean Fields) volcano (Italy): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 1 hour 45 minutes ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 11 km distance ENE from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): 0.4 km south of Naples, Napoli, Campania, Italy, Sep 8, 2021 12:05 am (GMT +2) (11 km ENE)All earthquakes at Campi Flegrei (Phlegrean Fields)

Clear Lake volcano (California): 40 earthquakes up to magnitude 2.1

Possible earthquake swarm: 40 earthquakes occurred near (under) the volcano during 20 hours, the last being recorded quake 4 hours ago. Hypocenter depths ranged between 3.4 and 0.2 km.
Earthquake details: (only 5 largest)
2.1 quake 7km NW of The Geysers, CA, Sep 6, 2021 7:24 pm (GMT -7) (18 km SSW)1.7 quake 6km WNW of The Geysers, CA, Sep 6, 2021 8:48 pm (GMT -7) (19 km SSW)1.6 quake 9km WNW of Cobb, CA, Sep 7, 2021 12:34 am (GMT -7) (15 km SSW)1.4 quake 7km NW of The Geysers, CA, Sep 6, 2021 7:31 pm (GMT -7) (18 km SSW)1.4 quake 7km NW of The Geysers, CA, Sep 7, 2021 1:05 am (GMT -7) (18 km SSW)All earthquakes at Clear Lake

Hijiori volcano (Honshu): magnitude 3.0 earthquake

A magnitude 3.0 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 16 km distance E from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): Kitamurayama-gun, 3.8 km northwest of Obanazawa, Yamagata, Japan, Sep 8, 2021 1:09 am (GMT +9) (16 km E)All earthquakes at Hijiori

Irazu volcano (Costa Rica): magnitude 2.2 earthquake

A magnitude 2.2 earthquake occurred at the volcano 19 hours ago. The quake, which might be volcanic in origin, was located at a depth of 6.0 km depth at 5 km distance E from the volcano.
Earthquake details:
2.2 quake Turrialba, 18 km northeast of Cartago, Costa Rica, Sep 6, 2021 10:45 pm (GMT -6) (5 km E)All earthquakes at Irazu

Iya volcano (Flores): magnitude 3.3 earthquake

A magnitude 3.3 earthquake occurred at the volcano 19 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.0 km depth at 5 km distance NW from the volcano.
Earthquake details:
3.3 quake Savu Sea, 9.2 km west of Ende, East Nusa Tenggara, Indonesia, Sep 7, 2021 1:13 pm (GMT +8) (5 km NW)All earthquakes at Iya

Kilauea volcano (Hawai'i (Big Island)): 2 earthquakes up to magnitude 2.1

2 earthquakes occurred near (under) the volcano during 14 hours, the last being recorded quake 8 hours ago. Hypocenter depths ranged between 5.6 and 1.6 km.
Earthquake details:
2.1 quake 13 Km S of Fern Forest, Hawaii, Sep 7, 2021 5:59 am (GMT -10) (19 km ESE)2.0 quake 7 Km SW of Volcano, Hawaii, Sep 6, 2021 3:53 pm (GMT -10) (2 km SE)All earthquakes at Kilauea

Kolumbo volcano (Greece): magnitude 2.1 earthquake

A magnitude 2.1 earthquake occurred at the volcano 7 hours ago. The quake, which might be volcanic in origin, was located at a depth of 14.3 km depth at 15 km distance NE from the volcano.
Earthquake details:
2.1 quake Aegean Sea, 23 km northeast of Oia, Kykladene, South Aegean, Greece, Sep 7, 2021 7:37 pm (GMT +3) (15 km NE)All earthquakes at Kolumbo

Loihi volcano (Hawai'i (Big Island)): magnitude 3.6 earthquake

A magnitude 3.6 earthquake occurred at the volcano 1 hour 14 minutes ago. The quake, which might be volcanic in origin, was located at a depth of 6.7 km depth at 18 km distance S from the volcano.
Earthquake details:
3.6 quake North Pacific Ocean, 43 mi southeast of Hawaiian Ocean View, Hawaii County, USA, Sep 7, 2021 12:36 pm (GMT -10) (18 km S)All earthquakes at Loihi

Nisyros volcano (Greece): 9 earthquakes up to magnitude 3.9

9 earthquakes occurred near (under) the volcano during 3 hours, the last being recorded quake 22 minutes ago. Hypocenter depths ranged between 14.3 and 4.4 km.
Earthquake details: (only 5 largest)
3.9 quake Aegean Sea, 44 km south of Kos, Dodecanese, South Aegean, Greece, Sep 8, 2021 12:55 am (GMT +3) (12 km SSE)3.5 quake Aegean Sea, 48 km south of Kos, Dodecanese, South Aegean, Greece, Sep 8, 2021 2:24 am (GMT +3) (13 km S)3.1 quake Aegean Sea, 48 km south of Kos, Dodecanese, South Aegean, Greece, Sep 8, 2021 2:27 am (GMT +3) (12 km S)1.9 quake Aegean Sea, 36 km south of Kos, Dodecanese, South Aegean, Greece, Sep 8, 2021 12:57 am (GMT +3) (15 km E)1.7 quake Aegean Sea, 36 km south of Kos, Dodecanese, South Aegean, Greece, Sep 8, 2021 2:05 am (GMT +3) (19 km E)All earthquakes at Nisyros

Paricutín (Michoacán-Guanajuato) volcano (Western & Central Mexico): magnitude 3.9 earthquake

A magnitude 3.9 earthquake occurred at the volcano 15 hours ago. The quake, which might be volcanic in origin, was located at a depth of 8.0 km depth at 11 km distance WSW from the volcano.
Earthquake details:
3.9 quake Periban, 31 km west of Uruapan, Michoacan, Mexico, Sep 7, 2021 3:58 am (GMT -5) (11 km WSW)All earthquakes at Paricutín (Michoacán-Guanajuato)
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