Earthquakes on September 27, 2025: 209 Worldwide, Largest M5.5

Time ↓	Mag ↕	Location ↕	Depth ↕	Felt ↕	MMI	Alert	Status	Details
2025-09-27 2025-09-27 23:35:28 UTC	2.1ml	61 km E of Pedro Bay, Alaska 59.838°, -153.013°	98.1 km	-	-	-	✓ Reviewed	USGS →
On September 27, 2025 at 23:35 UTC, a magnitude 2.1 earthquake struck 61 km E of Pedro Bay, Alaska. The event originated approximately 98.1 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 59.838°N, -153.013°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.
2025-09-27 2025-09-27 23:30:46 UTC	4.3mb	263 km ESE of Onagawa Chō, Japan 37.757°, 144.324°	10.0 km	-	-	-	✓ Reviewed	USGS →
A magnitude 4.3 earthquake was recorded 263 km ESE of Onagawa Chō, Japan on September 27, 2025 at 23:30 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.8 earthquake that occurred about 10 hours earlier. This was a shallow crustal earthquake, focused at 10.0 km depth. Geolocation places the event at 37.757°N, 144.324°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.
2025-09-27 2025-09-27 23:30:35 UTC	2.8ml	107 km SSE of Sand Point, Alaska 54.450°, -159.827°	31.6 km	-	-	-	✓ Reviewed	USGS →
Reports of a magnitude 2.8 earthquake 107 km SSE of Sand Point, Alaska came in on September 27, 2025 at 23:30 UTC. At a depth of 31.6 km, the event was shallow crustal. The epicenter is at 54.450°, -159.827°. 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.
2025-09-27 2025-09-27 23:29:02 UTC	4.5mb	247 km ESE of Onagawa Chō, Japan 37.741°, 144.127°	10.0 km	-	-	-	✓ Reviewed	USGS →
This magnitude 4.5 event was detected 247 km ESE of Onagawa Chō, Japan on September 27, 2025, with origin time 23:29 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.8 earthquake that occurred about 10 hours earlier. The hypocenter lay at 10.0 km, placing this in the shallow crustal category. Geolocation places the event at 37.741°N, 144.127°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.
2025-09-27 2025-09-27 22:47:21 UTC	2.0ml	31 km NW of Toyah, Texas 31.525°, -104.018°	7.0 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.0 seismic event took place 31 km NW of Toyah, Texas on September 27, 2025 at 22:47 UTC. It arrived roughly 7 hours after a larger magnitude 2.2 mainshock in the same 20 km area, placing it within the typical aftershock window. The event originated approximately 7.0 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 31.525°, -104.018°. 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.
2025-09-27 2025-09-27 22:46:06 UTC	4.4mb	16 km N of Markaz-e Woluswalī-ye Āchīn, Afghanistan 34.273°, 70.698°	10.0 km	-	-	-	✓ Reviewed	USGS →
At 22:46 UTC on September 27, 2025, a magnitude 4.4 tremor occurred 16 km N of Markaz-e Woluswalī-ye Āchīn, Afghanistan. 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. The epicenter is at 34.273°, 70.698°. 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.
2025-09-27 2025-09-27 22:22:37 UTC	3.4md	59 km N of Charlotte Amalie, U.S. Virgin Islands 18.881°, -64.944°	21.7 km	-	-	-	✓ Reviewed	USGS →
A magnitude 3.4 seismic event took place 59 km N of Charlotte Amalie, U.S. Virgin Islands on September 27, 2025 at 22:22 UTC. The hypocenter lay at 21.7 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 18.881°, -64.944°. 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.
2025-09-27 2025-09-27 22:17:56 UTC	4.9mb	southeast of Easter Island -41.108°, -91.231°	10.0 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 4.9 earthquake southeast of Easter Island at 22:17 UTC on September 27, 2025. At a depth of 10.0 km, the event was shallow crustal. Coordinates: -41.108°, -91.231°. 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.
2025-09-27 2025-09-27 22:13:03 UTC	4.4mb	124 km E of Petropavlovsk-Kamchatsky, Russia 52.921°, 160.460°	35.0 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 4.4 earthquake 124 km E of Petropavlovsk-Kamchatsky, Russia at 22:13 UTC on September 27, 2025. At a depth of 35.0 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 52.921°N, 160.460°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.
2025-09-27 2025-09-27 22:12:49 UTC	5.1mww	231 km W of Bandon, Oregon 43.520°, -127.205°	10.0 km	13	-	-	✓ Reviewed	USGS →
A magnitude 5.1 earthquake was recorded 231 km W of Bandon, Oregon on September 27, 2025 at 22:12 UTC. A tsunami evaluation was automatically initiated given the magnitude and location. Of every earthquake currently listed for worldwide seismic activity, this one generated the most felt reports from the public. Nearby residents submitted 13 felt reports to the USGS DYFI platform. It ranks as the second largest event in the current dataset. 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. Geolocation places the event at 43.520°N, -127.205°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.
2025-09-27 2025-09-27 21:37:17 UTC	4.2mb	44 km NNW of Finschhafen, Papua New Guinea -6.168°, 147.748°	69.6 km	-	-	-	✓ Reviewed	USGS →
This magnitude 4.2 event was detected 44 km NNW of Finschhafen, Papua New Guinea on September 27, 2025, with origin time 21:37 UTC. The hypocenter lay at 69.6 km, placing this in the shallow crustal category. The epicenter is at -6.168°, 147.748°. 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.
2025-09-27 2025-09-27 21:28:44 UTC	2.5ml	2 km S of Salcha, Alaska 64.499°, -146.892°	5.4 km	2	-	-	✓ Reviewed	USGS →
On September 27, 2025 at 21:28 UTC, a magnitude 2.5 earthquake struck 2 km S of Salcha, Alaska. A small number of nearby observers (2) submitted felt reports to the USGS. The hypocenter lay at 5.4 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 64.499°, -146.892°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-27 2025-09-27 20:37:15 UTC	2.3md	2 km NNE of The Geysers, CA 38.793°, -122.751°	1.2 km	-	-	-	Auto	USGS →
At 20:37 UTC on September 27, 2025, a magnitude 2.3 tremor occurred 2 km NNE of The Geysers, CA. At a depth of just 1.2 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 38.793°N, -122.751°E. The automatic solution is preliminary and may be refined as additional station data arrives. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-27 2025-09-27 20:25:01 UTC	4.6mb	12 km NNW of Hualin, China 34.923°, 104.673°	10.0 km	-	-	-	✓ Reviewed	USGS →
On September 27, 2025 at 20:25 UTC, a magnitude 4.6 earthquake struck 12 km NNW of Hualin, China. The event originated approximately 10.0 km below the surface, classifying it as shallow crustal. Geolocation places the event at 34.923°N, 104.673°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.
2025-09-27 2025-09-27 20:08:37 UTC	2.0ml	32 km NW of Toyah, Texas 31.532°, -104.015°	6.5 km	-	-	-	✓ Reviewed	USGS →
September 27, 2025 brought a magnitude 2.0 earthquake 32 km NW of Toyah, Texas, logged at 20:08 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.2 earthquake that occurred about 4 hours earlier. This was a shallow crustal earthquake, focused at 6.5 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 31.532°N, -104.015°E. 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.
2025-09-27 2025-09-27 18:39:21 UTC	4.5mb	Pacific-Antarctic Ridge -56.890°, -142.256°	10.0 km	-	-	-	✓ Reviewed	USGS →
Reports of a magnitude 4.5 earthquake near Pacific-Antarctic Ridge came in on September 27, 2025 at 18:39 UTC. At a depth of 10.0 km, the event was shallow crustal. Coordinates: -56.890°, -142.256°. 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.
2025-09-27 2025-09-27 18:22:03 UTC	2.1ml	63 km NNW of Yakutat, Alaska 60.073°, -140.181°	16.6 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.1 earthquake was recorded 63 km NNW of Yakutat, Alaska on September 27, 2025 at 18:22 UTC. This was a shallow crustal earthquake, focused at 16.6 km depth. Coordinates: 60.073°, -140.181°. 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.
2025-09-27 2025-09-27 18:01:40 UTC	4.3mb	south of the Fiji Islands -24.202°, 179.950°	495.1 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 4.3 earthquake south of the Fiji Islands with origin time 18:01 UTC on September 27, 2025. At 495.1 km, this deep-focus earthquake originated far below the brittle crust, deep inside the mantle. Coordinates: -24.202°, 179.950°. 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.
2025-09-27 2025-09-27 18:01:15 UTC	4.5mb	58 km NNW of Madang, Papua New Guinea -4.706°, 145.657°	10.4 km	-	-	-	✓ Reviewed	USGS →
A magnitude 4.5 seismic event took place 58 km NNW of Madang, Papua New Guinea on September 27, 2025 at 18:01 UTC. The event originated approximately 10.4 km below the surface, classifying it as shallow crustal. The epicenter is at -4.706°, 145.657°. 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.
2025-09-27 2025-09-27 17:53:17 UTC	3.1ml	92 km WNW of Atka, Alaska 52.486°, -175.476°	214.8 km	-	-	-	✓ Reviewed	USGS →
On September 27, 2025 at 17:53 UTC, a magnitude 3.1 earthquake struck 92 km WNW of Atka, Alaska. The event originated approximately 214.8 km below the surface, classifying it as intermediate depth. Coordinates: 52.486°, -175.476°. 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.
2025-09-27 2025-09-27 17:33:37 UTC	4.4mb	296 km W of Longyearbyen, Svalbard and Jan Mayen 78.974°, 2.718°	10.0 km	-	-	-	✓ Reviewed	USGS →
This magnitude 4.4 event was detected 296 km W of Longyearbyen, Svalbard and Jan Mayen on September 27, 2025, with origin time 17:33 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: 78.974°, 2.718°. 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.
2025-09-27 2025-09-27 17:31:01 UTC	2.1ml	61 km W of Karluk, Alaska 57.513°, -155.482°	70.1 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 2.1 earthquake 61 km W of Karluk, Alaska with origin time 17:31 UTC on September 27, 2025. The hypocenter lay at 70.1 km, placing this in the intermediate depth category. The offshore location combined with this depth is characteristic of seismicity along descending slabs. The epicenter is at 57.513°, -155.482°. 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.
2025-09-27 2025-09-27 17:16:33 UTC	2.1ml	81 km W of Eagle, Alaska 64.763°, -142.910°	1.0 km	-	-	-	✓ Reviewed	USGS →
On September 27, 2025, worldwide seismic activity registered a magnitude 2.1 earthquake 81 km W of Eagle, Alaska at 17:16 UTC. At a depth of just 1.0 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. Geolocation places the event at 64.763°N, -142.910°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.
2025-09-27 2025-09-27 17:11:57 UTC	3.2ml	221 km WNW of Bandon, Oregon 43.577°, -127.062°	10.0 km	-	-	-	✓ Reviewed	USGS →
September 27, 2025 brought a magnitude 3.2 earthquake 221 km WNW of Bandon, Oregon, logged at 17:11 UTC. At a depth of 10.0 km, the event was shallow crustal. Geolocation places the event at 43.577°N, -127.062°E. 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.
2025-09-27 2025-09-27 16:57:15 UTC	2.1ml	6 km SSW of Redlands, CA 34.002°, -117.202°	5.9 km	2	-	-	✓ Reviewed	USGS →
September 27, 2025 brought a magnitude 2.1 earthquake 6 km SSW of Redlands, CA, logged at 16:57 UTC. A small number of nearby observers (2) submitted felt reports to the USGS. At a depth of 5.9 km, the event was shallow crustal. The epicenter is at 34.002°, -117.202°. 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.
2025-09-27 2025-09-27 16:05:38 UTC	4.2mb	283 km WNW of Longyearbyen, Svalbard and Jan Mayen 79.145°, 3.551°	10.0 km	-	-	-	✓ Reviewed	USGS →
Reports of a magnitude 4.2 earthquake 283 km WNW of Longyearbyen, Svalbard and Jan Mayen came in on September 27, 2025 at 16:05 UTC. At a depth of 10.0 km, the event was shallow crustal. Geolocation places the event at 79.145°N, 3.551°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.
2025-09-27 2025-09-27 16:01:05 UTC	3.4md	54 km NNW of San Antonio, Puerto Rico 18.933°, -67.338°	6.2 km	-	-	-	✓ Reviewed	USGS →
This magnitude 3.4 event was detected 54 km NNW of San Antonio, Puerto Rico on September 27, 2025, with origin time 16:01 UTC. The event originated approximately 6.2 km below the surface, classifying it as shallow crustal. Geolocation places the event at 18.933°N, -67.338°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.
2025-09-27 2025-09-27 15:47:05 UTC	2.2ml	26 km NW of Toyah, Texas 31.488°, -103.985°	6.1 km	-	-	-	✓ Reviewed	USGS →
Reports of a magnitude 2.2 earthquake 26 km NW of Toyah, Texas came in on September 27, 2025 at 15:47 UTC. In the 72 hours after this event, the USGS recorded 4 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. This was a shallow crustal earthquake, focused at 6.1 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 31.488°N, -103.985°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-27 2025-09-27 15:36:11 UTC	2.0ml	7 km N of Trout Valley, New Mexico 33.104°, -108.192°	9.7 km	-	-	-	✓ Reviewed	USGS →
On September 27, 2025 at 15:36 UTC, a magnitude 2.0 earthquake struck 7 km N of Trout Valley, New Mexico. Coming 1 hours after a magnitude 2.9 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The hypocenter lay at 9.7 km, placing this in the shallow crustal category. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 33.104°, -108.192°. 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.
2025-09-27 2025-09-27 15:07:48 UTC	2.9ml	12 km N of Trout Valley, New Mexico 33.144°, -108.168°	13.3 km	-	-	-	✓ Reviewed	USGS →
At 15:07 UTC on September 27, 2025, a magnitude 2.9 tremor occurred 12 km N of Trout Valley, New Mexico. The event originated approximately 13.3 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 33.144°, -108.168°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M2.9 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 27, 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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