Earthquakes on September 21, 2025: 206 Worldwide, Largest M5.6

Time ↓	Mag ↕	Location ↕	Depth ↕	Felt ↕	MMI	Alert	Status	Details
2025-09-21 2025-09-21 23:55:52 UTC	2.4md	5 km SW of Guánica, Puerto Rico 17.936°, -66.941°	10.5 km	-	-	-	✓ Reviewed	USGS →
This magnitude 2.4 event was detected 5 km SW of Guánica, Puerto Rico on September 21, 2025, with origin time 23:55 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.5 earthquake that occurred about 19 hours earlier. The hypocenter lay at 10.5 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 17.936°N, -66.941°E. 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.
2025-09-21 2025-09-21 23:50:53 UTC	4.2mb	186 km E of Petropavlovsk-Kamchatsky, Russia 53.091°, 161.410°	10.0 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 4.2 earthquake 186 km E of Petropavlovsk-Kamchatsky, Russia at 23:50 UTC on September 21, 2025. It arrived roughly 22 hours after a larger magnitude 4.5 mainshock in the same 20 km area, placing it within the typical aftershock window. At a depth of 10.0 km, the event was shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 53.091°, 161.410°. 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.
2025-09-21 2025-09-21 23:28:57 UTC	4.2mb	106 km ESE of Petropavlovsk-Kamchatsky, Russia 52.645°, 160.052°	35.0 km	-	-	-	✓ Reviewed	USGS →
This magnitude 4.2 event was detected 106 km ESE of Petropavlovsk-Kamchatsky, Russia on September 21, 2025, with origin time 23:28 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.3 earthquake that occurred about 19 hours earlier. The event originated approximately 35.0 km below the surface, classifying it as shallow crustal. Geolocation places the event at 52.645°N, 160.052°E. 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.
2025-09-21 2025-09-21 23:18:23 UTC	3.8md	34 km SSW of Boca de Yuma, Dominican Republic 18.075°, -68.699°	122.0 km	-	-	-	✓ Reviewed	USGS →
A magnitude 3.8 seismic event took place 34 km SSW of Boca de Yuma, Dominican Republic on September 21, 2025 at 23:18 UTC. The event originated approximately 122.0 km below the surface, classifying it as intermediate depth. Geolocation places the event at 18.075°N, -68.699°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-21 2025-09-21 23:16:59 UTC	2.4ml	17 km NNW of Susitna, Alaska 61.697°, -150.577°	34.9 km	-	-	-	Auto	USGS →
Reports of a magnitude 2.4 earthquake 17 km NNW of Susitna, Alaska came in on September 21, 2025 at 23:16 UTC. At a depth of 34.9 km, the event was shallow crustal. Coordinates: 61.697°, -150.577°. The automatic solution is preliminary and may be refined as additional station data arrives. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-21 2025-09-21 22:50:53 UTC	4.6mb	166 km E of Petropavlovsk-Kamchatsky, Russia 52.810°, 161.067°	26.4 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 4.6 earthquake 166 km E of Petropavlovsk-Kamchatsky, Russia with origin time 22:50 UTC on September 21, 2025. It arrived roughly 22 hours after a larger magnitude 5.6 mainshock in the same 20 km area, placing it within the typical aftershock window. The hypocenter lay at 26.4 km, placing this in the shallow crustal category. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 52.810°, 161.067°. 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.
2025-09-21 2025-09-21 22:23:30 UTC	2.3ml	3 km NE of Heber, CA 32.752°, -115.504°	15.9 km	4	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 2.3 earthquake 3 km NE of Heber, CA with origin time 22:23 UTC on September 21, 2025. A small number of nearby observers (4) submitted felt reports to the USGS. The event originated approximately 15.9 km below the surface, classifying it as shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 32.752°N, -115.504°E. 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.
2025-09-21 2025-09-21 22:15:53 UTC	2.2md	5 km NW of The Geysers, CA 38.807°, -122.795°	3.1 km	-	-	-	Auto	USGS →
The USGS recorded this magnitude 2.2 earthquake 5 km NW of The Geysers, CA at 22:15 UTC on September 21, 2025. At a depth of just 3.1 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. Geolocation places the event at 38.807°N, -122.795°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.
2025-09-21 2025-09-21 21:54:36 UTC	4.5mb	102 km E of Ozernovskiy, Russia 51.572°, 157.977°	79.3 km	-	-	-	✓ Reviewed	USGS →
Reports of a magnitude 4.5 earthquake 102 km E of Ozernovskiy, Russia came in on September 21, 2025 at 21:54 UTC. At a depth of 79.3 km, the event was intermediate depth. The offshore location combined with this depth is characteristic of seismicity along descending slabs. Coordinates: 51.572°, 157.977°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-21 2025-09-21 21:53:11 UTC	2.3ml	40 km SSE of Magrath, Canada 49.086°, -112.640°	29.3 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.3 seismic event took place 40 km SSE of Magrath, Canada on September 21, 2025 at 21:53 UTC. The event originated approximately 29.3 km below the surface, classifying it as shallow crustal. The epicenter is at 49.086°, -112.640°. 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.
2025-09-21 2025-09-21 21:43:44 UTC	2.0ml	12 km NNE of Pāhala, Hawaii 19.308°, -155.423°	28.9 km	-	-	-	✓ Reviewed	USGS →
On September 21, 2025 at 21:43 UTC, a magnitude 2.0 earthquake struck 12 km NNE of Pāhala, Hawaii. It arrived roughly 1 hours after a larger magnitude 2.4 mainshock in the same 20 km area, placing it within the typical aftershock window. The event originated approximately 28.9 km below the surface, classifying it as shallow crustal. The epicenter is at 19.308°, -155.423°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-21 2025-09-21 21:40:42 UTC	2.4ml	14 km NNE of Pāhala, Hawaii 19.319°, -155.423°	28.2 km	-	-	-	Auto	USGS →
The USGS recorded this magnitude 2.4 earthquake 14 km NNE of Pāhala, Hawaii at 21:40 UTC on September 21, 2025. In the 72 hours after this event, the USGS recorded 3 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. This was a shallow crustal earthquake, focused at 28.2 km depth. The epicenter is at 19.319°, -155.423°. The automatic solution is preliminary and may be refined as additional station data arrives. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-21 2025-09-21 21:40:42 UTC	2.1ml	12 km NNE of Pāhala, Hawaii 19.302°, -155.419°	30.4 km	-	-	-	✓ Reviewed	USGS →
This magnitude 2.1 event was detected 12 km NNE of Pāhala, Hawaii on September 21, 2025, with origin time 21:40 UTC. Coming 2 hours after a magnitude 2.3 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event originated approximately 30.4 km below the surface, classifying it as shallow crustal. Coordinates: 19.302°, -155.419°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-21 2025-09-21 21:06:54 UTC	2.8md	2 km NE of San Germán, Puerto Rico 18.102°, -67.027°	10.8 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.8 seismic event took place 2 km NE of San Germán, Puerto Rico on September 21, 2025 at 21:06 UTC. The hypocenter lay at 10.8 km, placing this in the shallow crustal category. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 18.102°, -67.027°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-21 2025-09-21 21:05:46 UTC	5.1mww	8 km SW of Sındırgı, Turkey 39.184°, 28.110°	10.0 km	25	-	-	✓ Reviewed	USGS →
On September 21, 2025, worldwide seismic activity registered a magnitude 5.1 earthquake 8 km SW of Sındırgı, Turkey at 21:05 UTC. Of every earthquake currently listed for worldwide seismic activity, this one generated the most felt reports from the public. 25 people reported feeling the earthquake via the USGS Did You Feel It? system. It ranks as the fourth largest event in the current dataset. This was a shallow crustal earthquake, focused at 10.0 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 39.184°, 28.110°. 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.
2025-09-21 2025-09-21 20:36:11 UTC	4.1mb	204 km ESE of Ozernovskiy, Russia 50.679°, 159.117°	10.0 km	-	-	-	✓ Reviewed	USGS →
A magnitude 4.1 earthquake was recorded 204 km ESE of Ozernovskiy, Russia on September 21, 2025 at 20:36 UTC. This was a shallow crustal earthquake, focused at 10.0 km depth. The epicenter is at 50.679°, 159.117°. 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.
2025-09-21 2025-09-21 20:17:56 UTC	4.9mb	25 km WSW of Abriaquí, Colombia 6.524°, -76.264°	10.0 km	12	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 4.9 earthquake 25 km WSW of Abriaquí, Colombia at 20:17 UTC on September 21, 2025. The event generated 12 citizen felt reports to the USGS. At a depth of 10.0 km, the event was shallow crustal. Coordinates: 6.524°, -76.264°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-21 2025-09-21 20:05:08 UTC	4.4mb	northern Mid-Atlantic Ridge 30.143°, -43.212°	10.0 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 4.4 earthquake near northern Mid-Atlantic Ridge at 20:05 UTC on September 21, 2025. At a depth of 10.0 km, the event was shallow crustal. Geolocation places the event at 30.143°N, -43.212°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.
2025-09-21 2025-09-21 19:33:01 UTC	2.1ml	6 km WNW of Coupeville, Washington 48.239°, -122.764°	23.1 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.1 seismic event took place 6 km WNW of Coupeville, Washington on September 21, 2025 at 19:33 UTC. The hypocenter lay at 23.1 km, placing this in the shallow crustal category. Geolocation places the event at 48.239°N, -122.764°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-21 2025-09-21 19:20:14 UTC	4.5mb	15 km E of Lugu, Taiwan 23.767°, 120.903°	28.9 km	2	-	-	✓ Reviewed	USGS →
A magnitude 4.5 seismic event took place 15 km E of Lugu, Taiwan on September 21, 2025 at 19:20 UTC. A small number of nearby observers (2) submitted felt reports to the USGS. The event originated approximately 28.9 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 23.767°, 120.903°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-21 2025-09-21 19:13:58 UTC	2.3ml	10 km SSE of Pāhala, Hawaii 19.124°, -155.429°	28.8 km	-	-	-	✓ Reviewed	USGS →
September 21, 2025 brought a magnitude 2.3 earthquake 10 km SSE of Pāhala, Hawaii, logged at 19:13 UTC. This was a shallow crustal earthquake, focused at 28.8 km depth. Geolocation places the event at 19.124°N, -155.429°E. 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.
2025-09-21 2025-09-21 19:05:00 UTC	3.2ml	18 km ENE of Wright, Wyoming 43.836°, -105.299°	0.0 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 3.2 earthquake 18 km ENE of Wright, Wyoming at 19:05 UTC on September 21, 2025. 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. Coordinates: 43.836°, -105.299°. 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.
2025-09-21 2025-09-21 18:02:27 UTC	3.5md	87 km NE of Punta Cana, Dominican Republic 19.072°, -67.749°	44.0 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 3.5 earthquake 87 km NE of Punta Cana, Dominican Republic with origin time 18:02 UTC on September 21, 2025. The event originated approximately 44.0 km below the surface, classifying it as shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 19.072°, -67.749°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-21 2025-09-21 17:54:02 UTC	4.3mb	166 km ESE of Petropavlovsk-Kamchatsky, Russia 52.715°, 161.027°	10.0 km	-	-	-	✓ Reviewed	USGS →
On September 21, 2025 at 17:54 UTC, a magnitude 4.3 earthquake struck 166 km ESE of Petropavlovsk-Kamchatsky, Russia. It arrived roughly 2 hours after a larger magnitude 4.7 mainshock in the same 20 km area, placing it within the typical aftershock window. The event originated approximately 10.0 km below the surface, classifying it as shallow crustal. The epicenter is at 52.715°, 161.027°. 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.
2025-09-21 2025-09-21 17:21:49 UTC	4.3mb	10 km WSW of Caracoto, Peru -15.596°, -70.201°	239.9 km	-	-	-	✓ Reviewed	USGS →
A magnitude 4.3 earthquake was recorded 10 km WSW of Caracoto, Peru on September 21, 2025 at 17:21 UTC. This was a intermediate depth earthquake, focused at 239.9 km depth. Geolocation places the event at -15.596°N, -70.201°E. 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.
2025-09-21 2025-09-21 17:06:38 UTC	4.3mb	31 km NNE of Tasiilaq, Greenland 65.889°, -37.490°	10.0 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 4.3 earthquake 31 km NNE of Tasiilaq, Greenland with origin time 17:06 UTC on September 21, 2025. Coming 4 hours after a magnitude 4.6 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The hypocenter lay at 10.0 km, placing this in the shallow crustal category. Coordinates: 65.889°, -37.490°. 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.
2025-09-21 2025-09-21 16:59:27 UTC	5.2mww	northern Mid-Atlantic Ridge 29.593°, -42.533°	10.0 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 5.2 earthquake near northern Mid-Atlantic Ridge with origin time 16:59 UTC on September 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: 29.593°, -42.533°. 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.
2025-09-21 2025-09-21 16:54:58 UTC	3.1ml	116 km SSW of McCarthy, Alaska 60.424°, -143.478°	7.1 km	-	-	-	✓ Reviewed	USGS →
This magnitude 3.1 event was detected 116 km SSW of McCarthy, Alaska on September 21, 2025, with origin time 16:54 UTC. The event originated approximately 7.1 km below the surface, classifying it as shallow crustal. The epicenter is at 60.424°, -143.478°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-21 2025-09-21 15:54:58 UTC	4.5mb	31 km N of Tasiilaq, Greenland 65.894°, -37.529°	10.0 km	-	-	-	✓ Reviewed	USGS →
September 21, 2025 brought a magnitude 4.5 earthquake 31 km N of Tasiilaq, Greenland, logged at 15:54 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.6 earthquake that occurred about 2 hours earlier. This was a shallow crustal earthquake, focused at 10.0 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 65.894°N, -37.529°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-21 2025-09-21 15:38:47 UTC	4.7mb	167 km E of Petropavlovsk-Kamchatsky, Russia 52.869°, 161.093°	10.0 km	-	-	-	✓ Reviewed	USGS →
On September 21, 2025 at 15:38 UTC, a magnitude 4.7 earthquake struck 167 km E of Petropavlovsk-Kamchatsky, Russia. This event falls inside the aftershock decay of a nearby magnitude 5.6 earthquake that occurred about 14 hours earlier. 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. Geolocation places the event at 52.869°N, 161.093°E. 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.

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 September 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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