Earthquakes on October 21, 2025: 201 Worldwide, Largest M5.2

Time ↓	Mag ↕	Location ↕	Depth ↕	Felt ↕	MMI	Alert	Status	Details
2025-10-21 2025-10-21 23:46:11 UTC	3.5ml	56 km W of Karluk, Alaska 57.648°, -155.393°	0.0 km	-	II	-	Auto	USGS →
On October 21, 2025 at 23:46 UTC, a magnitude 3.5 earthquake struck 56 km W of Karluk, Alaska. Peak ground motion corresponded to MMI 2.7, classified as weak shaking. At a depth of just 0.0 km, this was a very shallow event, close enough to the surface that modest magnitudes can produce significant local shaking. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 57.648°, -155.393°. The automatic solution is preliminary and may be refined as additional station data arrives. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 23:37:08 UTC	5.1mww	58 km SE of Vilyuchinsk, Russia 52.607°, 159.095°	68.0 km	-	-	-	✓ Reviewed	USGS →
A magnitude 5.1 earthquake was recorded 58 km SE of Vilyuchinsk, Russia on October 21, 2025 at 23:37 UTC. It ranks as the second largest event in the current dataset. At a depth of 68.0 km, the event was shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 52.607°N, 159.095°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M5.1 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 23:06:08 UTC	4.7mb	2 km SSE of Fraijanes, Guatemala 14.448°, -90.431°	177.9 km	-	-	-	✓ Reviewed	USGS →
October 21, 2025 brought a magnitude 4.7 earthquake 2 km SSE of Fraijanes, Guatemala, logged at 23:06 UTC. At a depth of 177.9 km, the event was intermediate depth. The epicenter is at 14.448°, -90.431°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 22:57:04 UTC	4.4mb	11 km NNW of Iray, Peru -15.753°, -72.656°	10.0 km	-	-	-	✓ Reviewed	USGS →
A magnitude 4.4 seismic event took place 11 km NNW of Iray, Peru on October 21, 2025 at 22:57 UTC. The event originated approximately 10.0 km below the surface, classifying it as shallow crustal. The epicenter is at -15.753°, -72.656°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 22:50:17 UTC	4.1mb	5 km SW of Cserkeszőlő, Hungary 46.828°, 20.145°	13.9 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 4.1 earthquake 5 km SW of Cserkeszőlő, Hungary with origin time 22:50 UTC on October 21, 2025. The event originated approximately 13.9 km below the surface, classifying it as shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 46.828°, 20.145°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 22:31:04 UTC	3.4md	62 km S of Boca de Yuma, Dominican Republic 17.819°, -68.566°	80.0 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 3.4 earthquake 62 km S of Boca de Yuma, Dominican Republic with origin time 22:31 UTC on October 21, 2025. The hypocenter lay at 80.0 km, placing this in the intermediate depth category. The offshore location combined with this depth is characteristic of seismicity along descending slabs. Geolocation places the event at 17.819°N, -68.566°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 22:22:27 UTC	4.4mb	Fiji region -20.923°, -179.081°	637.8 km	-	-	-	✓ Reviewed	USGS →
October 21, 2025 brought a magnitude 4.4 earthquake in the Fiji region, logged at 22:22 UTC. At 637.8 km, this is the deepest earthquake in the current dataset — firmly in the deep-focus category. Geolocation places the event at -20.923°N, -179.081°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 21:48:16 UTC	2.3ml	13 km ESE of Pāhala, Hawaii 19.137°, -155.373°	29.9 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 2.3 earthquake 13 km ESE of Pāhala, Hawaii with origin time 21:48 UTC on October 21, 2025. The hypocenter lay at 29.9 km, placing this in the shallow crustal category. The epicenter is at 19.137°, -155.373°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 21:33:45 UTC	2.4md	22 km WNW of Rincón, Puerto Rico 18.430°, -67.439°	19.9 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.4 earthquake was recorded 22 km WNW of Rincón, Puerto Rico on October 21, 2025 at 21:33 UTC. This was a shallow crustal earthquake, focused at 19.9 km depth. Coordinates: 18.430°, -67.439°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 21:20:20 UTC	2.2ml	42 km WNW of Happy Valley, Alaska 60.106°, -152.425°	92.1 km	-	-	-	Auto	USGS →
The USGS recorded this magnitude 2.2 earthquake 42 km WNW of Happy Valley, Alaska at 21:20 UTC on October 21, 2025. This was a intermediate depth earthquake, focused at 92.1 km depth. The epicenter is at 60.106°, -152.425°. The automatic solution is preliminary and may be refined as additional station data arrives. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 20:39:20 UTC	3.2ml	19 km N of Colstrip, Montana 46.055°, -106.643°	0.0 km	-	-	-	✓ Reviewed	USGS →
On October 21, 2025, worldwide seismic activity registered a magnitude 3.2 earthquake 19 km N of Colstrip, Montana at 20:39 UTC. At a depth of just 0.0 km, this was a very shallow event, close enough to the surface that modest magnitudes can produce significant local shaking. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 46.055°, -106.643°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 20:06:28 UTC	2.5ml	57 km NW of Ninilchik, Alaska 60.409°, -152.408°	87.8 km	-	-	-	Auto	USGS →
This magnitude 2.5 event was detected 57 km NW of Ninilchik, Alaska on October 21, 2025, with origin time 20:06 UTC. The event originated approximately 87.8 km below the surface, classifying it as intermediate depth. The offshore location combined with this depth is characteristic of seismicity along descending slabs. The epicenter is at 60.409°, -152.408°. The automatic solution is preliminary and may be refined as additional station data arrives. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 20:02:05 UTC	5.1mww	south of the Kermadec Islands -33.667°, -178.505°	10.0 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 5.1 earthquake south of the Kermadec Islands with origin time 20:02 UTC on October 21, 2025. It ranks as the third largest event in the current dataset. The event originated approximately 10.0 km below the surface, classifying it as shallow crustal. Coordinates: -33.667°, -178.505°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M5.1 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 19:44:50 UTC	2.2md	3 km SSW of Cobb, CA 38.799°, -122.732°	0.6 km	-	-	-	Auto	USGS →
A magnitude 2.2 seismic event took place 3 km SSW of Cobb, CA on October 21, 2025 at 19:44 UTC. It arrived roughly 1 hours after a larger magnitude 2.8 mainshock in the same 20 km area, placing it within the typical aftershock window. At a depth of just 0.6 km, this was a very shallow event, close enough to the surface that modest magnitudes can produce significant local shaking. The epicenter is at 38.799°, -122.732°. The automatic solution is preliminary and may be refined as additional station data arrives. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 19:44:30 UTC	2.8md	2 km ENE of The Geysers, CA 38.784°, -122.735°	1.5 km	2	-	-	Auto	USGS →
Reports of a magnitude 2.8 earthquake 2 km ENE of The Geysers, CA came in on October 21, 2025 at 19:44 UTC. In the 72 hours after this event, the USGS recorded 5 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. At a depth of just 1.5 km, this was a very shallow event, close enough to the surface that modest magnitudes can produce significant local shaking. A small number of nearby observers (2) submitted felt reports to the USGS. The epicenter is at 38.784°, -122.735°. The automatic solution is preliminary and may be refined as additional station data arrives. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 19:34:37 UTC	2.1md	8 km ENE of Vallejo, CA 38.128°, -122.141°	4.1 km	5	-	-	Auto	USGS →
On October 21, 2025, worldwide seismic activity registered a magnitude 2.1 earthquake 8 km ENE of Vallejo, CA at 19:34 UTC. At a depth of just 4.1 km, this was a very shallow event, close enough to the surface that modest magnitudes can produce significant local shaking. A small number of nearby observers (5) submitted felt reports to the USGS. Coordinates: 38.128°, -122.141°. The automatic solution is preliminary and may be refined as additional station data arrives. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 19:27:05 UTC	2.6ml	38 km SSW of Karluk, Alaska 57.279°, -154.805°	54.7 km	-	-	-	✓ Reviewed	USGS →
On October 21, 2025 at 19:27 UTC, a magnitude 2.6 earthquake struck 38 km SSW of Karluk, Alaska. The hypocenter lay at 54.7 km, placing this in the shallow crustal category. The epicenter is at 57.279°, -154.805°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 19:26:51 UTC	3.1ml	68 km S of Akhiok, Alaska 56.333°, -154.144°	56.7 km	-	-	-	Auto	USGS →
At 19:26 UTC on October 21, 2025, a magnitude 3.1 tremor occurred 68 km S of Akhiok, Alaska. The event originated approximately 56.7 km below the surface, classifying it as shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 56.333°, -154.144°. The automatic solution is preliminary and may be refined as additional station data arrives. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 19:26:06 UTC	4.6mb	156 km SSE of Vilyuchinsk, Russia 51.582°, 159.035°	58.3 km	-	-	-	✓ Reviewed	USGS →
A magnitude 4.6 earthquake was recorded 156 km SSE of Vilyuchinsk, Russia on October 21, 2025 at 19:26 UTC. This was a shallow crustal earthquake, focused at 58.3 km depth. Coordinates: 51.582°, 159.035°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 19:07:19 UTC	2.2md	2 km E of Berkeley, CA 37.872°, -122.249°	9.0 km	10	-	-	Auto	USGS →
This magnitude 2.2 event was detected 2 km E of Berkeley, CA on October 21, 2025, with origin time 19:07 UTC. Nearby residents submitted 10 felt reports to the USGS DYFI platform. The hypocenter lay at 9.0 km, placing this in the shallow crustal category. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 37.872°N, -122.249°E. The automatic solution is preliminary and may be refined as additional station data arrives. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 19:04:56 UTC	2.6ml	69 km SSW of Kaktovik, Alaska 69.527°, -144.025°	0.0 km	-	-	-	Auto	USGS →
A magnitude 2.6 earthquake was recorded 69 km SSW of Kaktovik, Alaska on October 21, 2025 at 19:04 UTC. At a depth of just 0.0 km, this was a very shallow event, close enough to the surface that modest magnitudes can produce significant local shaking. Geolocation places the event at 69.527°N, -144.025°E. The automatic solution is preliminary and may be refined as additional station data arrives. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 19:03:00 UTC	4.6mb	47 km WNW of Kotabumi, Indonesia -4.604°, 104.515°	170.3 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 4.6 earthquake 47 km WNW of Kotabumi, Indonesia with origin time 19:03 UTC on October 21, 2025. The hypocenter lay at 170.3 km, placing this in the intermediate depth category. The epicenter is at -4.604°, 104.515°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 18:48:32 UTC	4.4mb	112 km E of Namie, Japan 37.549°, 142.269°	35.0 km	-	-	-	✓ Reviewed	USGS →
On October 21, 2025 at 18:48 UTC, a magnitude 4.4 earthquake struck 112 km E of Namie, Japan. The hypocenter lay at 35.0 km, placing this in the shallow crustal category. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 37.549°, 142.269°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 18:14:48 UTC	5.1mww	34 km WSW of Ashkāsham, Afghanistan 36.607°, 71.156°	237.5 km	4	-	-	✓ Reviewed	USGS →
On October 21, 2025, worldwide seismic activity registered a magnitude 5.1 earthquake 34 km WSW of Ashkāsham, Afghanistan at 18:14 UTC. It ranks as the fourth largest event in the current dataset. A small number of nearby observers (4) submitted felt reports to the USGS. This was a intermediate depth earthquake, focused at 237.5 km depth. The epicenter is at 36.607°, 71.156°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M5.1 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 18:11:08 UTC	5.2mb	South Sandwich Islands region -59.109°, -25.583°	84.9 km	-	-	-	✓ Reviewed	USGS →
On October 21, 2025 at 18:11 UTC, a magnitude 5.2 earthquake struck in the South Sandwich Islands region. It is the largest earthquake currently listed for worldwide seismic activity on October 21, 2025. The hypocenter lay at 84.9 km, placing this in the intermediate depth category. The epicenter is at -59.109°, -25.583°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M5.2 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 18:05:40 UTC	4.4mb	68 km S of Severo-Kuril’sk, Russia 50.074°, 156.306°	56.9 km	-	-	-	✓ Reviewed	USGS →
A magnitude 4.4 earthquake was recorded 68 km S of Severo-Kuril’sk, Russia on October 21, 2025 at 18:05 UTC. At a depth of 56.9 km, the event was shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 50.074°, 156.306°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 18:04:41 UTC	4.2mb	40 km SE of Severo-Kuril’sk, Russia 50.441°, 156.558°	55.4 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 4.2 earthquake 40 km SE of Severo-Kuril’sk, Russia with origin time 18:04 UTC on October 21, 2025. The hypocenter lay at 55.4 km, placing this in the shallow crustal category. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 50.441°, 156.558°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 17:52:26 UTC	4.3mb	156 km NE of Alugan, Philippines 13.162°, 126.552°	10.0 km	-	-	-	✓ Reviewed	USGS →
This magnitude 4.3 event was detected 156 km NE of Alugan, Philippines on October 21, 2025, with origin time 17:52 UTC. The event originated approximately 10.0 km below the surface, classifying it as shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 13.162°, 126.552°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 17:31:40 UTC	4.2mb	76 km ESE of Hakha, Burma (Myanmar) 22.468°, 94.326°	88.3 km	-	-	-	✓ Reviewed	USGS →
On October 21, 2025, worldwide seismic activity registered a magnitude 4.2 earthquake 76 km ESE of Hakha, Burma (Myanmar) at 17:31 UTC. At a depth of 88.3 km, the event was intermediate depth. The epicenter is at 22.468°, 94.326°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-21 2025-10-21 16:42:10 UTC	4.4mb	2 km S of Tauranga, New Zealand -37.710°, 176.168°	286.6 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 4.4 earthquake 2 km S of Tauranga, New Zealand with origin time 16:42 UTC on October 21, 2025. The event originated approximately 286.6 km below the surface, classifying it as intermediate depth. The offshore location combined with this depth is characteristic of seismicity along descending slabs. Geolocation places the event at -37.710°N, 176.168°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data.

Legend:

Mag: Magnitude ({magType} = ml, mb, mw, etc.)

Felt: Number of DYFI felt reports

MMI: Modified Mercalli Intensity (I-X+)

Alert: PAGER alert level

Depth: Shallow (<70km), Intermediate, Deep (>300km)

Status: Auto = preliminary, Reviewed = verified by seismologist

Click any row to see additional technical details.

About This Page

This page shows all earthquakes recorded by the USGS Earthquake Hazards Program during the 24-hour UTC period on October 21, 2025. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.

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