Earthquakes on September 16, 2025: 176 Worldwide, Largest M6.0

Time ↓	Mag ↕	Location ↕	Depth ↕	Felt ↕	MMI	Alert	Status	Details
2025-09-16 2025-09-16 23:53:09 UTC	4.4mb	33 km NNE of Mejillones, Chile -22.811°, -70.367°	35.0 km	-	-	-	✓ Reviewed	USGS →
A magnitude 4.4 earthquake was recorded 33 km NNE of Mejillones, Chile on September 16, 2025 at 23:53 UTC. This was a shallow crustal earthquake, focused at 35.0 km depth. Coordinates: -22.811°, -70.367°. 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.
2025-09-16 2025-09-16 23:49:39 UTC	2.0ml	65 km ESE of Egegik, Alaska 58.071°, -156.300°	8.3 km	-	-	-	Auto	USGS →
A magnitude 2.0 seismic event took place 65 km ESE of Egegik, Alaska on September 16, 2025 at 23:49 UTC. The event originated approximately 8.3 km below the surface, classifying it as shallow crustal. Geolocation places the event at 58.071°N, -156.300°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.
2025-09-16 2025-09-16 23:06:19 UTC	2.1ml	9 km S of Princeton, Canada 49.376°, -120.515°	-0.5 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.1 earthquake was recorded 9 km S of Princeton, Canada on September 16, 2025 at 23:06 UTC. At a depth of just -0.5 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. The epicenter is at 49.376°, -120.515°. 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.
2025-09-16 2025-09-16 22:15:53 UTC	2.6ml	14 km NNW of Ambler, Alaska 67.214°, -157.922°	0.1 km	-	-	-	Auto	USGS →
This magnitude 2.6 event was detected 14 km NNW of Ambler, Alaska on September 16, 2025, with origin time 22:15 UTC. At a depth of just 0.1 km, this was a very shallow event, close enough to the surface that modest magnitudes can produce significant local shaking. The epicenter is at 67.214°, -157.922°. 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.
2025-09-16 2025-09-16 22:05:43 UTC	2.3md	5 km WNW of Chester, CA 40.329°, -121.280°	7.5 km	-	-	-	✓ Reviewed	USGS →
On September 16, 2025 at 22:05 UTC, a magnitude 2.3 earthquake struck 5 km WNW of Chester, CA. The hypocenter lay at 7.5 km, placing this in the shallow crustal category. Geolocation places the event at 40.329°N, -121.280°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.
2025-09-16 2025-09-16 22:03:55 UTC	2.2ml	62 km ENE of San Vicente, Mexico 31.473°, -115.608°	13.1 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.2 seismic event took place 62 km ENE of San Vicente, Mexico on September 16, 2025 at 22:03 UTC. It arrived roughly 14 hours after a larger magnitude 2.9 mainshock in the same 20 km area, placing it within the typical aftershock window. The hypocenter lay at 13.1 km, placing this in the shallow crustal category. The epicenter is at 31.473°, -115.608°. 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.
2025-09-16 2025-09-16 21:33:59 UTC	4.4mb	52 km ESE of Shimoda, Japan 34.486°, 139.466°	10.0 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 4.4 earthquake 52 km ESE of Shimoda, Japan with origin time 21:33 UTC on September 16, 2025. The hypocenter lay at 10.0 km, placing this in the shallow crustal category. The epicenter is at 34.486°, 139.466°. 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.
2025-09-16 2025-09-16 21:22:06 UTC	4.1mb	37 km WNW of Ollagüe, Chile -21.124°, -68.603°	130.6 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 4.1 earthquake 37 km WNW of Ollagüe, Chile with origin time 21:22 UTC on September 16, 2025. The event originated approximately 130.6 km below the surface, classifying it as intermediate depth. Geolocation places the event at -21.124°N, -68.603°E. 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.
2025-09-16 2025-09-16 20:59:08 UTC	3.0ml	55 km NE of Valmy, Nevada 41.167°, -116.693°	10.6 km	-	II	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 3.0 earthquake 55 km NE of Valmy, Nevada with origin time 20:59 UTC on September 16, 2025. Peak ground motion corresponded to MMI 3.0, classified as weak shaking. The hypocenter lay at 10.6 km, placing this in the shallow crustal category. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 41.167°, -116.693°. 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.
2025-09-16 2025-09-16 20:56:59 UTC	4.0mb	18 km NE of Mollendo, Peru -16.902°, -71.889°	133.3 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 4.0 earthquake 18 km NE of Mollendo, Peru at 20:56 UTC on September 16, 2025. At a depth of 133.3 km, the event was intermediate depth. The offshore location combined with this depth is characteristic of seismicity along descending slabs. Geolocation places the event at -16.902°N, -71.889°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-16 2025-09-16 19:10:30 UTC	4.5mb	Rat Islands, Aleutian Islands, Alaska 51.705°, 178.150°	113.1 km	-	II	-	✓ Reviewed	USGS →
September 16, 2025 brought a magnitude 4.5 earthquake near Rat Islands, Aleutian Islands, Alaska, logged at 19:10 UTC. Maximum shaking intensity peaked at MMI 2.2 (weak). At a depth of 113.1 km, the event was intermediate depth. The epicenter is at 51.705°, 178.150°. 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.
2025-09-16 2025-09-16 19:07:02 UTC	3.4ml	22 km SE of Wright, Wyoming 43.598°, -105.314°	0.0 km	-	-	-	✓ Reviewed	USGS →
September 16, 2025 brought a magnitude 3.4 earthquake 22 km SE of Wright, Wyoming, logged at 19:07 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: 43.598°, -105.314°. 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.
2025-09-16 2025-09-16 18:19:05 UTC	2.0ml	55 km NE of Valmy, Nevada 41.168°, -116.685°	12.3 km	-	-	-	✓ Reviewed	USGS →
September 16, 2025 brought a magnitude 2.0 earthquake 55 km NE of Valmy, Nevada, logged at 18:19 UTC. Coming 13 hours after a magnitude 2.4 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. This was a shallow crustal earthquake, focused at 12.3 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 41.168°, -116.685°. 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.
2025-09-16 2025-09-16 18:13:04 UTC	2.0ml	23 km SW of Bandera, Texas 29.553°, -99.218°	6.3 km	-	-	-	✓ Reviewed	USGS →
On September 16, 2025 at 18:13 UTC, a magnitude 2.0 earthquake struck 23 km SW of Bandera, Texas. The hypocenter lay at 6.3 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 29.553°, -99.218°. 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.
2025-09-16 2025-09-16 17:42:13 UTC	2.3md	22 km SW of Toms Place, CA 37.427°, -118.857°	8.8 km	-	-	-	✓ Reviewed	USGS →
On September 16, 2025, worldwide seismic activity registered a magnitude 2.3 earthquake 22 km SW of Toms Place, CA at 17:42 UTC. This was a shallow crustal earthquake, focused at 8.8 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 37.427°N, -118.857°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.
2025-09-16 2025-09-16 16:59:46 UTC	6.0mww	208 km SE of Kokopo, Papua New Guinea -5.518°, 153.735°	31.0 km	-	IV	green	✓ Reviewed	USGS →
On September 16, 2025 at 16:59 UTC, a magnitude 6.0 earthquake struck 208 km SE of Kokopo, Papua New Guinea. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. It is the largest earthquake currently listed for worldwide seismic activity on September 16, 2025. Maximum shaking intensity peaked at MMI 4.1 (moderate). The hypocenter lay at 31.0 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 -5.518°, 153.735°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M6.0 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-16 2025-09-16 16:56:34 UTC	2.8ml	33 km WNW of Akhiok, Alaska 57.035°, -154.695°	6.9 km	-	-	-	Auto	USGS →
The USGS recorded this magnitude 2.8 earthquake 33 km WNW of Akhiok, Alaska at 16:56 UTC on September 16, 2025. This was a shallow crustal earthquake, focused at 6.9 km depth. Coordinates: 57.035°, -154.695°. 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.
2025-09-16 2025-09-16 16:53:10 UTC	2.3md	33 km W of Petrolia, CA 40.329°, -124.674°	22.0 km	-	-	-	✓ Reviewed	USGS →
At 16:53 UTC on September 16, 2025, a magnitude 2.3 tremor occurred 33 km W of Petrolia, CA. The hypocenter lay at 22.0 km, placing this in the shallow crustal category. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 40.329°, -124.674°. 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.
2025-09-16 2025-09-16 16:11:25 UTC	4.9mww	52 km SW of Puerto Madero, Mexico 14.419°, -92.801°	53.0 km	-	-	-	✓ Reviewed	USGS →
At 16:11 UTC on September 16, 2025, a magnitude 4.9 tremor occurred 52 km SW of Puerto Madero, Mexico. It ranks as the fifth largest event in the current dataset. The hypocenter lay at 53.0 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 14.419°N, -92.801°E. 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.
2025-09-16 2025-09-16 16:05:37 UTC	2.5ml	47 km ESE of Beatty, Nevada 36.768°, -116.260°	10.0 km	-	-	-	✓ Reviewed	USGS →
Reports of a magnitude 2.5 earthquake 47 km ESE of Beatty, Nevada came in on September 16, 2025 at 16:05 UTC. At a depth of 10.0 km, the event was shallow crustal. Geolocation places the event at 36.768°N, -116.260°E. 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.
2025-09-16 2025-09-16 15:47:01 UTC	3.7ml	44 km NE of Pedro Bay, Alaska 60.017°, -153.457°	143.8 km	-	III	-	✓ Reviewed	USGS →
A magnitude 3.7 seismic event took place 44 km NE of Pedro Bay, Alaska on September 16, 2025 at 15:47 UTC. A tsunami evaluation was automatically initiated given the magnitude and location. On the Modified Mercalli scale, shaking reached 3.1 — considered light. The hypocenter lay at 143.8 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 60.017°N, -153.457°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.7 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-16 2025-09-16 14:45:46 UTC	2.3md	6 km SE of Maria Antonia, Puerto Rico 17.941°, -66.844°	10.8 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 2.3 earthquake 6 km SE of Maria Antonia, Puerto Rico at 14:45 UTC on September 16, 2025. At a depth of 10.8 km, the event was shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 17.941°, -66.844°. 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.
2025-09-16 2025-09-16 14:30:11 UTC	4.0mb	Bonin Islands, Japan region 27.275°, 140.310°	320.5 km	-	-	-	✓ Reviewed	USGS →
This magnitude 4.0 event was detected in the Bonin Islands, Japan region on September 16, 2025, with origin time 14:30 UTC. At 320.5 km, this deep-focus earthquake originated far below the brittle crust, deep inside the mantle. Coordinates: 27.275°, 140.310°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-16 2025-09-16 14:00:40 UTC	2.0ml	70 km S of Shungnak, Alaska 66.259°, -157.188°	0.0 km	-	-	-	Auto	USGS →
A magnitude 2.0 earthquake was recorded 70 km S of Shungnak, Alaska on September 16, 2025 at 14:00 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. Geolocation places the event at 66.259°N, -157.188°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.
2025-09-16 2025-09-16 13:53:17 UTC	4.1mb	117 km E of Petropavlovsk-Kamchatsky, Russia 53.276°, 160.353°	45.0 km	-	-	-	✓ Reviewed	USGS →
On September 16, 2025, worldwide seismic activity registered a magnitude 4.1 earthquake 117 km E of Petropavlovsk-Kamchatsky, Russia at 13:53 UTC. This was a shallow crustal earthquake, focused at 45.0 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 53.276°, 160.353°. 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.
2025-09-16 2025-09-16 13:11:52 UTC	2.2ml	3 km N of Little America, Wyoming 41.573°, -109.858°	-2.6 km	1	-	-	✓ Reviewed	USGS →
On September 16, 2025 at 13:11 UTC, a magnitude 2.2 earthquake struck 3 km N of Little America, Wyoming. At just -2.6 km, it was the shallowest earthquake in the current dataset — a shallow crustal event. A small number of nearby observers (1) submitted felt reports to the USGS. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 41.573°, -109.858°. 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.
2025-09-16 2025-09-16 13:04:54 UTC	4.0mb	123 km SSE of Sand Point, Alaska 54.367°, -159.577°	25.4 km	-	II	-	✓ Reviewed	USGS →
Reports of a magnitude 4.0 earthquake 123 km SSE of Sand Point, Alaska came in on September 16, 2025 at 13:04 UTC. Maximum shaking intensity peaked at MMI 2.3 (weak). This was a shallow crustal earthquake, focused at 25.4 km depth. The epicenter is at 54.367°, -159.577°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-09-16 2025-09-16 12:13:27 UTC	4.3mb	145 km ESE of Petropavlovsk-Kamchatsky, Russia 52.778°, 160.740°	32.4 km	-	-	-	✓ Reviewed	USGS →
Reports of a magnitude 4.3 earthquake 145 km ESE of Petropavlovsk-Kamchatsky, Russia came in on September 16, 2025 at 12:13 UTC. At a depth of 32.4 km, the event was shallow crustal. Coordinates: 52.778°, 160.740°. 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.
2025-09-16 2025-09-16 11:55:57 UTC	4.2mwr	213 km S of Unalaska, Alaska 51.973°, -166.079°	10.0 km	-	I	-	✓ Reviewed	USGS →
September 16, 2025 brought a magnitude 4.2 earthquake 213 km S of Unalaska, Alaska, logged at 11:55 UTC. On the Modified Mercalli scale, shaking reached 1.3 — considered weak. 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 51.973°N, -166.079°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.
2025-09-16 2025-09-16 11:39:55 UTC	2.3md	11 km SSW of Tres Pinos, CA 36.705°, -121.377°	3.7 km	-	-	-	✓ Reviewed	USGS →
This magnitude 2.3 event was detected 11 km SSW of Tres Pinos, CA on September 16, 2025, with origin time 11:39 UTC. At a depth of just 3.7 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 36.705°N, -121.377°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.

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 16, 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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