Earthquakes on September 28, 2025: 233 Worldwide, Largest M5.5

Time ↓	Mag ↕	Location ↕	Depth ↕	Felt ↕	MMI	Alert	Status	Details
2025-09-28 2025-09-28 23:57:41 UTC	4.3mb	70 km S of San Jose Village, Northern Mariana Islands 14.333°, 145.618°	108.5 km	-	-	-	✓ Reviewed	USGS →
On September 28, 2025, worldwide seismic activity registered a magnitude 4.3 earthquake 70 km S of San Jose Village, Northern Mariana Islands at 23:57 UTC. This was a intermediate depth earthquake, focused at 108.5 km depth. The offshore location combined with this depth is characteristic of seismicity along descending slabs. Coordinates: 14.333°, 145.618°. 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.
2025-09-28 2025-09-28 23:42:29 UTC	3.8md	105 km NNE of Cruz Bay, U.S. Virgin Islands 19.221°, -64.428°	66.0 km	-	-	-	✓ Reviewed	USGS →
A magnitude 3.8 earthquake was recorded 105 km NNE of Cruz Bay, U.S. Virgin Islands on September 28, 2025 at 23:42 UTC. At a depth of 66.0 km, the event was shallow crustal. Coordinates: 19.221°, -64.428°. 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.
2025-09-28 2025-09-28 23:11:28 UTC	4.4mb	161 km SW of Merizo Village, Guam 12.249°, 143.607°	35.0 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 4.4 earthquake 161 km SW of Merizo Village, Guam with origin time 23:11 UTC on September 28, 2025. 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. The epicenter is at 12.249°, 143.607°. 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.
2025-09-28 2025-09-28 23:06:42 UTC	2.8ml	28 km N of Chalkyitsik, Alaska 66.913°, -143.745°	13.9 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 2.8 earthquake 28 km N of Chalkyitsik, Alaska at 23:06 UTC on September 28, 2025. This was a shallow crustal earthquake, focused at 13.9 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 66.913°N, -143.745°E. 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.
2025-09-28 2025-09-28 22:48:30 UTC	4.6mwr	22 km W of Emet, Turkey 39.378°, 29.005°	10.0 km	1	-	-	✓ Reviewed	USGS →
At 22:48 UTC on September 28, 2025, a magnitude 4.6 tremor occurred 22 km W of Emet, Turkey. This event falls inside the aftershock decay of a nearby magnitude 5.2 earthquake that occurred about 13 hours earlier. It ranks as the fifth largest event in the current dataset. A small number of nearby observers (1) submitted felt reports to the USGS. The hypocenter lay at 10.0 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 39.378°N, 29.005°E. 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.
2025-09-28 2025-09-28 22:32:05 UTC	4.4mb	147 km ESE of Petropavlovsk-Kamchatsky, Russia 52.554°, 160.645°	34.6 km	-	-	-	✓ Reviewed	USGS →
On September 28, 2025, worldwide seismic activity registered a magnitude 4.4 earthquake 147 km ESE of Petropavlovsk-Kamchatsky, Russia at 22:32 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.5 earthquake that occurred about 8 hours earlier. At a depth of 34.6 km, the event was shallow crustal. Geolocation places the event at 52.554°N, 160.645°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.
2025-09-28 2025-09-28 22:18:34 UTC	4.4mb	33 km SW of Port-Vila, Vanuatu -17.952°, 168.095°	35.0 km	-	-	-	✓ Reviewed	USGS →
At 22:18 UTC on September 28, 2025, a magnitude 4.4 tremor occurred 33 km SW of Port-Vila, Vanuatu. The event originated approximately 35.0 km below the surface, classifying it as shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: -17.952°, 168.095°. 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.
2025-09-28 2025-09-28 21:31:07 UTC	4.2mb	68 km W of La Ligua, Chile -32.347°, -71.953°	30.2 km	1	-	-	✓ Reviewed	USGS →
On September 28, 2025 at 21:31 UTC, a magnitude 4.2 earthquake struck 68 km W of La Ligua, Chile. A small number of nearby observers (1) submitted felt reports to the USGS. The event originated approximately 30.2 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 -32.347°, -71.953°. 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.
2025-09-28 2025-09-28 21:23:51 UTC	4.5mwr	35 km ESE of Yonakuni, Japan 24.347°, 123.323°	58.0 km	-	-	-	✓ Reviewed	USGS →
Reports of a magnitude 4.5 earthquake 35 km ESE of Yonakuni, Japan came in on September 28, 2025 at 21:23 UTC. This was a shallow crustal earthquake, focused at 58.0 km depth. Geolocation places the event at 24.347°N, 123.323°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.
2025-09-28 2025-09-28 21:12:37 UTC	2.1md	2 km NNE of Danville, CA 37.843°, -121.997°	9.1 km	1	-	-	Auto	USGS →
September 28, 2025 brought a magnitude 2.1 earthquake 2 km NNE of Danville, CA, logged at 21:12 UTC. A small number of nearby observers (1) submitted felt reports to the USGS. This was a shallow crustal earthquake, focused at 9.1 km depth. Geolocation places the event at 37.843°N, -121.997°E. 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.
2025-09-28 2025-09-28 20:58:27 UTC	2.4ml	13 km SW of Karluk, Alaska 57.474°, -154.603°	64.8 km	-	-	-	Auto	USGS →
A magnitude 2.4 seismic event took place 13 km SW of Karluk, Alaska on September 28, 2025 at 20:58 UTC. The hypocenter lay at 64.8 km, placing this in the shallow crustal category. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 57.474°, -154.603°. 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.
2025-09-28 2025-09-28 20:54:40 UTC	2.4ml	11 km NE of Lyman, Wyoming 41.400°, -110.189°	41.9 km	-	-	-	✓ Reviewed	USGS →
Reports of a magnitude 2.4 earthquake 11 km NE of Lyman, Wyoming came in on September 28, 2025 at 20:54 UTC. This was a shallow crustal earthquake, focused at 41.9 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 41.400°N, -110.189°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.
2025-09-28 2025-09-28 20:53:18 UTC	4.4mwr	34 km SW of Camiña, Chile -19.519°, -69.678°	17.8 km	20	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 4.4 earthquake 34 km SW of Camiña, Chile at 20:53 UTC on September 28, 2025. 20 people reported feeling the earthquake via the USGS Did You Feel It? system. This was a shallow crustal earthquake, focused at 17.8 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at -19.519°, -69.678°. 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.
2025-09-28 2025-09-28 20:37:12 UTC	2.1ml	57 km E of Port Alsworth, Alaska 60.169°, -153.276°	145.2 km	-	-	-	Auto	USGS →
On September 28, 2025 at 20:37 UTC, a magnitude 2.1 earthquake struck 57 km E of Port Alsworth, Alaska. The hypocenter lay at 145.2 km, placing this in the intermediate depth category. The offshore location combined with this depth is characteristic of seismicity along descending slabs. Coordinates: 60.169°, -153.276°. 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.
2025-09-28 2025-09-28 20:31:13 UTC	3.8mb	103 km S of Adak, Alaska 50.959°, -176.904°	10.0 km	-	-	-	✓ Reviewed	USGS →
On September 28, 2025 at 20:31 UTC, a magnitude 3.8 earthquake struck 103 km S of Adak, Alaska. The hypocenter lay at 10.0 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 50.959°N, -176.904°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.
2025-09-28 2025-09-28 20:12:43 UTC	2.0ml	1 km ENE of Minco, Oklahoma 35.321°, -97.929°	7.3 km	1	-	-	✓ Reviewed	USGS →
On September 28, 2025 at 20:12 UTC, a magnitude 2.0 earthquake struck 1 km ENE of Minco, Oklahoma. A small number of nearby observers (1) submitted felt reports to the USGS. The event originated approximately 7.3 km below the surface, classifying it as shallow crustal. The epicenter is at 35.321°, -97.929°. 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.
2025-09-28 2025-09-28 20:12:39 UTC	2.1ml	54 km NE of Valmy, Nevada 41.171°, -116.723°	10.3 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.1 earthquake was recorded 54 km NE of Valmy, Nevada on September 28, 2025 at 20:12 UTC. It arrived roughly 3 hours after a larger magnitude 3.1 mainshock in the same 20 km area, placing it within the typical aftershock window. At a depth of 10.3 km, the event was shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 41.171°, -116.723°. 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.
2025-09-28 2025-09-28 20:06:05 UTC	3.1md	55 km NNE of Vieques, Puerto Rico 18.857°, -65.566°	53.2 km	-	-	-	✓ Reviewed	USGS →
On September 28, 2025 at 20:06 UTC, a magnitude 3.1 earthquake struck 55 km NNE of Vieques, Puerto Rico. The event originated approximately 53.2 km below the surface, classifying it as shallow crustal. Coordinates: 18.857°, -65.566°. 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.
2025-09-28 2025-09-28 20:03:56 UTC	2.7md	19 km N of Hatillo, Puerto Rico 18.660°, -66.804°	13.3 km	-	-	-	✓ Reviewed	USGS →
Reports of a magnitude 2.7 earthquake 19 km N of Hatillo, Puerto Rico came in on September 28, 2025 at 20:03 UTC. At a depth of 13.3 km, the event was shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 18.660°, -66.804°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-28 2025-09-28 20:02:47 UTC	3.0ml	66 km NNE of Petersville, Alaska 63.077°, -150.465°	102.2 km	-	-	-	✓ Reviewed	USGS →
A magnitude 3.0 earthquake was recorded 66 km NNE of Petersville, Alaska on September 28, 2025 at 20:02 UTC. This was a intermediate depth earthquake, focused at 102.2 km depth. The epicenter is at 63.077°, -150.465°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-28 2025-09-28 19:21:45 UTC	3.5ml	32 km ENE of Pedro Bay, Alaska 59.845°, -153.545°	130.1 km	-	III	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 3.5 earthquake 32 km ENE of Pedro Bay, Alaska at 19:21 UTC on September 28, 2025. Maximum shaking intensity peaked at MMI 3.1 (light). At a depth of 130.1 km, the event was intermediate depth. The epicenter is at 59.845°, -153.545°. 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.
2025-09-28 2025-09-28 19:21:00 UTC	2.0ml	12 km SW of Susitna, Alaska 61.453°, -150.653°	41.6 km	-	-	-	Auto	USGS →
A magnitude 2.0 earthquake was recorded 12 km SW of Susitna, Alaska on September 28, 2025 at 19:21 UTC. This was a shallow crustal earthquake, focused at 41.6 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 61.453°N, -150.653°E. The automatic solution is preliminary and may be refined as additional station data arrives. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-28 2025-09-28 19:13:09 UTC	4.4mb	56 km NE of Cabatuan, Philippines 12.850°, 125.619°	10.0 km	-	-	-	✓ Reviewed	USGS →
This magnitude 4.4 event was detected 56 km NE of Cabatuan, Philippines on September 28, 2025, with origin time 19:13 UTC. The hypocenter lay at 10.0 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 12.850°N, 125.619°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.
2025-09-28 2025-09-28 19:06:15 UTC	2.1ml	51 km NE of Valmy, Nevada 41.149°, -116.735°	9.5 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 2.1 earthquake 51 km NE of Valmy, Nevada with origin time 19:06 UTC on September 28, 2025. This event falls inside the aftershock decay of a nearby magnitude 3.1 earthquake that occurred about 2 hours earlier. The event originated approximately 9.5 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 41.149°N, -116.735°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.
2025-09-28 2025-09-28 18:57:43 UTC	4.2mb	111 km ENE of Petropavlovsk-Kamchatsky, Russia 53.620°, 160.020°	68.1 km	-	-	-	✓ Reviewed	USGS →
A magnitude 4.2 earthquake was recorded 111 km ENE of Petropavlovsk-Kamchatsky, Russia on September 28, 2025 at 18:57 UTC. This was a shallow crustal earthquake, focused at 68.1 km depth. Geolocation places the event at 53.620°N, 160.020°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.
2025-09-28 2025-09-28 18:41:23 UTC	5.2mww	121 km SSE of Lata, Solomon Islands -11.687°, 166.329°	68.0 km	1	-	-	✓ Reviewed	USGS →
A magnitude 5.2 earthquake was recorded 121 km SSE of Lata, Solomon Islands on September 28, 2025 at 18:41 UTC. It ranks as the second largest event in the current dataset. A small number of nearby observers (1) submitted felt reports to the USGS. At a depth of 68.0 km, the event was shallow crustal. Geolocation places the event at -11.687°N, 166.329°E. 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.
2025-09-28 2025-09-28 18:40:03 UTC	2.3ml	25 km N of Spencer, Idaho 44.587°, -112.222°	10.3 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.3 earthquake was recorded 25 km N of Spencer, Idaho on September 28, 2025 at 18:40 UTC. Coming 2 hours after a magnitude 3.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. This was a shallow crustal earthquake, focused at 10.3 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 44.587°, -112.222°. 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.
2025-09-28 2025-09-28 18:04:57 UTC	2.4ml	56 km E of Maneadero, B.C., MX 31.715°, -115.977°	5.0 km	-	-	-	✓ Reviewed	USGS →
September 28, 2025 brought a magnitude 2.4 earthquake 56 km E of Maneadero, B.C., MX, logged at 18:04 UTC. At a depth of 5.0 km, the event was shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 31.715°, -115.977°. 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.
2025-09-28 2025-09-28 17:44:43 UTC	4.2mb	Fiji region -13.535°, 176.360°	10.0 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 4.2 earthquake in the Fiji region with origin time 17:44 UTC on September 28, 2025. The hypocenter lay at 10.0 km, placing this in the shallow crustal category. Coordinates: -13.535°, 176.360°. 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.
2025-09-28 2025-09-28 17:21:20 UTC	4.5mb	109 km WNW of Abepura, Indonesia -2.186°, 139.740°	27.9 km	-	-	-	✓ Reviewed	USGS →
A magnitude 4.5 seismic event took place 109 km WNW of Abepura, Indonesia on September 28, 2025 at 17:21 UTC. The hypocenter lay at 27.9 km, placing this in the shallow crustal category. Coordinates: -2.186°, 139.740°. 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.

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 28, 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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