Volcano earthquake report for Thursday, 28 May 2026
World map showing volcanoes with shallow (less than 50 km) earthquakes within 20 km radius during the past 24 hours on 28 May 2026 Number in brackets indicate nr of quakes.

Quakes detected near: Barva (1 quake mag 2.8), Buzzard Creek (1 quake mag 1.8), Camiguin de Babuyanes (5 quakes between mag 1.4-2.1), Campi Flegrei (Phlegrean Fields) (3 quakes between mag 0.1-3.0), Chirip (1 quake mag 3.0), Clear Lake (25 quakes between mag 0.5-1.9)
Coso (13 quakes between mag 0.5-2.9), Davidof (1 quake mag 1.7), Didicas (1 quake mag 2.2), Golden Trout Creek (1 quake mag 1.4), Kaguyak (1 quake mag 1.6), Kilauea (3 quakes between mag 1.9-2.0), Kolumbo (3 quakes between mag 0.9-1.7), Kupreanof (1 quake mag 1.1), Leonard Range (1 quake mag 1.8), Loki-Fögrufjöll volcano (3 quakes between mag 0.5-1.6), Maroa (1 quake mag 1.7), Maunaloa (4 quakes between mag 1.5-1.9), Minami Kasuga (1 quake mag 4.7), Nemrut Dagi (1 quake mag 1.4), Ngauruhoe (1 quake mag 1.0), Ontake-san (2 quakes between mag 2.7-2.8), Salton Buttes (2 quakes between mag 1.7-2.1), Spurr (1 quake mag 1.2) (updated 05h50)

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:



Barva volcano (Costa Rica): magnitude 2.8 earthquake

A magnitude 2.8 earthquake occurred at the volcano 12 hours ago. The quake, which might be volcanic in origin, was located at a depth of 13.00 km depth at 16 km distance E from the volcano.
Earthquake details:
2.8 quake Provincia de Heredia, 29 km northeast of San Jose, Costa Rica, May 27, 2026 12:12 pm (GMT -6) (16 km E)
All earthquakes at Barva

Camiguin de Babuyanes volcano (North of Luzon): 5 earthquakes up to magnitude 2.1

5 earthquakes occurred near (under) the volcano during 5 hours, the last being recorded quake 13 hours ago. Hypocenter depths ranged between 30.00 and 22.00 km.
Earthquake details:
2.1 quake South China Sea, 12 km east of Camiguin Island, Philippines, May 27, 2026 11:13 pm (GMT +8) (19 km ENE)
2.0 quake South China Sea, 6.6 km east of Camiguin Island, Philippines, May 27, 2026 09:59 pm (GMT +8) (15 km NE)
1.9 quake South China Sea, 9.5 km east of Camiguin Island, Philippines, May 27, 2026 10:06 pm (GMT +8) (18 km NE)
1.7 quake South China Sea, 8.6 km east of Camiguin Island, Philippines, May 28, 2026 12:26 am (GMT +8) (16 km NE)
1.4 quake 69 km northeast of Aparri, Province of Cagayan, Cagayan Valley, Philippines, May 27, 2026 07:47 pm (GMT +8) (12 km NNE)
All earthquakes at Camiguin de Babuyanes

Campi Flegrei (Phlegrean Fields) volcano (Italy): 3 earthquakes up to magnitude 3.0

3 earthquakes occurred near (under) the volcano during 1 hour 10 minutes, the last being recorded quake 6 hours ago. Hypocenter depths ranged between 10.00 and 0.09 km.
Earthquake details:
Reported seismic-like event (likely no quake): 1.2 km west of Naples, Napoli, Campania, Italy, May 28, 2026 01:14 am (GMT +2) (10 km ENE)
0.7 quake 3.7 km east of Pozzuoli, Napoli, Campania, Italy, May 28, 2026 12:20 am (GMT +2) (1 km N)
0.1 quake 1.7 km northwest of Bagnoli, Napoli, Campania, Italy, May 28, 2026 01:30 am (GMT +2) (1 km ESE)
All earthquakes at Campi Flegrei (Phlegrean Fields)

Chirip volcano (Iturup Island): 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 9 km distance SSE from the volcano.
Earthquake details:
Reported seismic-like event (likely no quake): 7 km northeast of Kuril'sk, Sakhalin Oblast, Russia, May 28, 2026 03:19 am (GMT +11) (9 km SSE)
All earthquakes at Chirip

Clear Lake volcano (California): 25 earthquakes up to magnitude 1.9

Possible earthquake swarm: 25 earthquakes occurred near (under) the volcano during 22 hours, the last being recorded quake 35 minutes ago. Hypocenter depths ranged between 17.43 and 1.19 km.
Earthquake details: (only 5 largest)
1.9 quake Sonoma County, 15 mi southwest of Clearlake, Lake County, California, United States, May 27, 2026 06:55 pm (GMT -7) (18 km SSW)
1.8 quake Sonoma County, 13 mi southwest of Clearlake, Lake County, California, United States, May 27, 2026 02:48 pm (GMT -7) (16 km S)
1.7 quake 12 mi southwest of Clearlake, Lake County, California, United States, May 27, 2026 05:13 am (GMT -7) (15 km S)
1.6 quake Sonoma County, 13 mi southwest of Clearlake, Lake County, California, United States, May 27, 2026 10:15 pm (GMT -7) (18 km S)
1.2 quake 27 mi north of Santa Rosa, Sonoma County, California, United States, May 27, 2026 06:50 am (GMT -7) (16 km SSW)
All earthquakes at Clear Lake

Coso volcano (California): 13 earthquakes up to magnitude 2.9

Possible earthquake swarm: 13 earthquakes occurred near (under) the volcano during 12 hours, the last being recorded quake 6 hours ago. Hypocenter depths ranged between 9.27 and 1.49 km.
Earthquake details: (only 5 largest)
2.9 quake Inyo County, 29 mi north of Ridgecrest, Kern County, California, United States, May 27, 2026 04:02 am (GMT -7) (4 km E)
1.9 quake Inyo County, 28 mi north of Ridgecrest, Kern County, California, United States, May 27, 2026 04:03 am (GMT -7) (4 km E)
1.2 quake 16 km NE of Little Lake, CA, May 27, 2026 12:58 pm (GMT -7) (4 km E)
1.0 quake 16 km ESE of Little Lake, CA, May 27, 2026 04:28 pm (GMT -7) (17 km SSE)
1.0 quake 15 km NE of Little Lake, CA, May 27, 2026 01:40 pm (GMT -7) (4 km E)
All earthquakes at Coso

Didicas volcano (North of Luzon): magnitude 2.2 earthquake

A magnitude 2.2 earthquake occurred at the volcano 18 hours ago. The quake, which might be volcanic in origin, was located at a depth of 3.00 km depth at 19 km distance SSE from the volcano.
Earthquake details:
2.2 quake Philippine Sea, 35 km east of Camiguin Island, Philippines, May 27, 2026 07:44 pm (GMT +8) (19 km SSE)
All earthquakes at Didicas

Minami Kasuga volcano (Volcano Islands): magnitude 4.7 earthquake

A magnitude 4.7 earthquake occurred at the volcano 5 hours ago. The quake, which might be volcanic in origin, was located at a depth of 10.00 km depth at 12 km distance E from the volcano.
Earthquake details:
4.7 quake North Pacific Ocean, 439 km northwest of Pagan Village, Northern Mariana Islands, May 28, 2026 11:14 am (GMT +10) (12 km E)
All earthquakes at Minami Kasuga

Ontake-san volcano (Honshu): 2 earthquakes up to magnitude 2.8

2 earthquakes occurred near (under) the volcano during 8 hours, the last being recorded quake 1 hour 21 minutes ago. Hypocenter depths ranged between 11.30 and 10.80 km.
Earthquake details:
2.8 quake 13 km northeast of Gero, Gifu, Japan, May 28, 2026 05:13 am (GMT +9) (12 km W)
2.7 quake 13 km northeast of Gero, Gifu, Japan, May 28, 2026 01:29 pm (GMT +9) (13 km W)
All earthquakes at Ontake-san

Salton Buttes volcano (California): 2 earthquakes up to magnitude 2.1

2 earthquakes occurred near (under) the volcano at nearly the same time (20:17 UTC). Hypocenter depths ranged between 4.82 and 4.63 km.
Earthquake details:
2.1 quake 13 mi northwest of Brawley, Imperial County, California, United States, May 27, 2026 01:16 pm (GMT -7) (5 km S)
1.7 quake 13 mi northwest of Brawley, Imperial County, California, United States, May 27, 2026 01:17 pm (GMT -7) (5 km S)
All earthquakes at Salton Buttes
https://www.volcanodiscovery.com/earthquakes-volcanoes/news/303531/Volcano-earthquake-report-for-Thursday-28-May-2026.html