Volcano earthquake report for Thursday, 4 Jun 2026

Quakes detected near: Askja (2 quakes between mag 0.7-1.3), Bardarbunga (8 quakes between mag 0.1-1.0), Brennisteinsfjöll (57 quakes between mag 0.0-2.2), Campi Flegrei (Phlegrean Fields) (5 quakes between mag 0.2-1.4), Clear Lake (27 quakes between mag 0.2-2.3), Cleveland (4 quakes between mag 0.7-1.1)
Eldey (8 quakes between mag 0.3-1.5), Etna (3 quakes between mag 1.4-2.8), Eyafjallajökull (2 quakes between mag 0.4-1.3), Grímsnes (3 quakes between mag 0.6-1.9), Hekla (1 quake mag 1.1), Hengill (10 quakes between mag 0.0-1.0), Hrómundartindur (64 quakes between mag 0.0-1.5), Katla (8 quakes between mag 0.0-1.4), Kilauea (1 quake mag 1.9), Kolumbo (1 quake mag 1.4), Langjökull (2 quakes between mag 0.7-1.0), Ljósufjöll (2 quakes between mag 0.7-1.1), Masaya (1 quake mag 2.5), Matutum (1 quake mag 2.0), Maunaloa (1 quake mag 2.5), Miyake-shima (1 quake mag 3.1), Moffett (6 quakes between mag 0.8-1.6), Northern EPR-Segment RO2 (1 quake mag 3.0), Pico (1 quake mag 2.2), Prestahnukur (161 quakes between mag 0.0-3.5), Rumble II West (1 quake mag 3.4), Salton Buttes (1 quake mag 1.6), Tana (2 quakes between mag 0.7-1.1), Tenerife (2 quakes between mag 1.0-1.4), Torfajökull (1 quake mag 1.7), Trident (2 quakes between mag 0.3-1.1), Vesuvius (1 quake mag 3.0), Öraefajökull (1 quake mag 1.2) (updated 12h50)

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:

Brennisteinsfjöll volcano (Reykjanes Peninsula, Iceland): 57 earthquakes up to magnitude 2.2

Possible earthquake swarm: 57 earthquakes occurred near (under) the volcano during 22 hours, the last being recorded quake 1 hour 35 minutes ago. Hypocenter depths ranged between 23.00 and 0.00 km.
Earthquake details: (only 5 largest)
2.2 quake 3.3 km SSW of Helgafell Jun 3, 2026 11:08 pm (Universal Time) (7 km NNW)
1.8 quake 4.5 km WSW of Litla_Kaffistofan Jun 4, 2026 01:10 am (Universal Time) (18 km NE)
1.6 quake 4.7 km WSW of Litla_Kaffistofan Jun 4, 2026 12:53 am (Universal Time) (18 km NE)
1.6 quake Iceland: 4.9 km WSW of Litla_Kaffistofan Jun 4, 2026 01:57 am (Reykjavik time) (18 km NE)
1.5 quake 4.8 km WSW of Litla_Kaffistofan Jun 4, 2026 01:39 am (Universal Time) (18 km NE)
All earthquakes at Brennisteinsfjöll

Clear Lake volcano (California): 27 earthquakes up to magnitude 2.3

Possible earthquake swarm: 27 earthquakes occurred near (under) the volcano during 22 hours, the last being recorded quake 1 hour 1 minutes ago. Hypocenter depths ranged between 15.41 and 1.42 km.
Earthquake details: (only 5 largest)
2.3 quake 27 mi north of Santa Rosa, Sonoma County, California, United States, Jun 3, 2026 10:13 pm (GMT -7) (17 km SSW)
1.5 quake 13 mi southwest of Clearlake, Lake County, California, United States, Jun 3, 2026 11:28 pm (GMT -7) (15 km S)
1.4 quake 27 mi north of Santa Rosa, Sonoma County, California, United States, Jun 4, 2026 04:48 am (GMT -7) (16 km S)
1.4 quake Lake County, 28 mi north of Santa Rosa, Sonoma County, California, United States, Jun 3, 2026 10:12 pm (GMT -7) (15 km S)
1.4 quake 27 mi north of Santa Rosa, Sonoma County, California, United States, Jun 3, 2026 10:28 pm (GMT -7) (18 km SSW)
All earthquakes at Clear Lake

Etna volcano (Italy): 3 earthquakes up to magnitude 2.8

3 earthquakes occurred near (under) the volcano during 10 minutes, the last being recorded quake 23 hours ago. Hypocenter depths ranged between 22.94 and 17.09 km.
Earthquake details:
2.8 quake 17 km northeast of Adrano, Catania, Sicily, Italy, Jun 3, 2026 04:07 pm (GMT +2) (5 km NW)
1.9 quake 9.6 km east of Bronte, Catania, Sicily, Italy, Jun 3, 2026 04:03 pm (GMT +2) (5 km WNW)
1.4 quake 11 km east of Bronte, Catania, Sicily, Italy, Jun 3, 2026 04:13 pm (GMT +2) (4 km NW)
All earthquakes at Etna

Hrómundartindur volcano (Iceland): 64 earthquakes up to magnitude 1.5

Possible earthquake swarm: 64 earthquakes occurred near (under) the volcano during 21 hours, the last being recorded quake 3 hours ago. Hypocenter depths ranged between 9.20 and 0.00 km.
Earthquake details: (only 5 largest)
1.5 quake 4.3 km E of Hveragerði Jun 3, 2026 01:02 pm (Universal Time) (9 km SSE)
1.5 quake 3.4 km NNE of Hrómundartindi Jun 4, 2026 01:37 am (Universal Time) (4 km NNE)
1.2 quake Iceland: 2.4 km ENE of Litla_Kaffistofan Jun 4, 2026 04:42 am (Reykjavik time) (12 km W)
1.1 quake Iceland: 3.9 km WNW of Þrengsli Jun 4, 2026 02:30 am (Reykjavik time) (17 km WSW)
1.0 quake 2.6 km ESE of Litla_Kaffistofan Jun 3, 2026 01:15 pm (Universal Time) (13 km WSW)
All earthquakes at Hrómundartindur

Masaya volcano (Nicaragua): magnitude 2.5 earthquake

A magnitude 2.5 earthquake occurred at the volcano 19 hours ago. The quake, which might be volcanic in origin, was located at a depth of 12.00 km depth at 10 km distance N from the volcano.
Earthquake details:
2.5 quake Departamento de Masaya, 11 km southeast of Managua, Nicaragua, Jun 3, 2026 11:59 am (GMT -6) (10 km N)
All earthquakes at Masaya

Maunaloa volcano (Hawai'i (Big Island)): magnitude 2.5 earthquake

A magnitude 2.5 earthquake occurred at the volcano 19 hours ago. The quake, which might be volcanic in origin, was located at a depth of 40.87 km depth at 4 km distance SSW from the volcano.
Earthquake details:
2.5 quake 40 mi southwest of Hilo, Hawaii County, Hawaii, United States, Jun 3, 2026 08:12 am (GMT -10) (4 km SSW)
All earthquakes at Maunaloa

Miyake-shima volcano (Izu Islands): magnitude 3.1 earthquake

A magnitude 3.1 earthquake occurred at the volcano 16 hours ago. The quake, which might be volcanic in origin, was located at a depth of 20.00 km depth at 12 km distance W from the volcano.
Earthquake details:
3.1 quake Philippine Sea, 26 km southeast of Kozu Shima Island, Tokyo, Japan, Jun 4, 2026 06:00 am (GMT +9) (12 km W)
All earthquakes at Miyake-shima

Northern EPR-Segment RO2 volcano (Eastern Pacific Ocean): 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 10.00 km depth at 16 km distance SW from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): Mexico Jun 3, 2026 05:20 pm (GMT +0) (16 km SW)
All earthquakes at Northern EPR-Segment RO2

Pico volcano (Azores): magnitude 2.2 earthquake

A magnitude 2.2 earthquake occurred at the volcano 10 hours ago. The quake, which might be volcanic in origin, was located at a depth of 0 km depth at 3 km distance SW from the volcano.
Earthquake details:
2.2 quake North Atlantic Ocean, 7.1 km southwest of Pico Island, Azores, Portugal, Jun 4, 2026 02:31 am (Universal Time) (3 km SW)
All earthquakes at Pico

Prestahnukur volcano (Iceland): 161 earthquakes up to magnitude 3.5

Possible earthquake swarm: 161 earthquakes occurred near (under) the volcano during 23 hours, the last being recorded quake 21 minutes ago. Hypocenter depths ranged between 27.60 and 0.00 km.
Earthquake details: (only 5 largest)
3.5 quake West, 72 km northeast of Reykjavik, Capital Region, Iceland, Jun 3, 2026 11:08 pm (Reykjavik time) (11 km WSW)
3.3 quake 14.6 km SSE of Húsafell Jun 3, 2026 11:08 pm (Universal Time) (10 km WSW)
2.5 quake Iceland: 15.5 km SE of Húsafell Jun 4, 2026 02:14 am (Reykjavik time) (6 km WSW)
2.5 quake 14.9 km SSE of Húsafell Jun 4, 2026 05:55 am (Universal Time) (9 km WSW)
2.4 quake 14.1 km SSE of Húsafell Jun 3, 2026 11:38 pm (Universal Time) (10 km WSW)
All earthquakes at Prestahnukur

Rumble II West volcano (New Zealand): magnitude 3.4 earthquake

A magnitude 3.4 earthquake occurred at the volcano 6 hours ago. The quake, which might be volcanic in origin, was located at a depth of 5.00 km depth at 18 km distance SSE from the volcano.
Earthquake details:
3.4 quake South Pacific Ocean, 234 km north of Hicks Bay, Gisborne, New Zealand, Jun 4, 2026 06:47 pm (GMT +12) (18 km SSE)
All earthquakes at Rumble II West

Vesuvius volcano (Italy): magnitude 3.0 earthquake

A magnitude 3.0 earthquake occurred at the volcano 14 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 14 km distance NW from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): 5.1 km northeast of Naples, Napoli, Campania, Italy, Jun 4, 2026 12:24 am (GMT +2) (14 km NW)
All earthquakes at Vesuvius
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