Earthquakes on October 23, 2025: 153 Worldwide, Largest M5.6

Time ↓	Mag ↕	Location ↕	Depth ↕	Felt ↕	MMI	Alert	Status	Details
2025-10-23 2025-10-23 23:46:11 UTC	2.0md	7 km SSE of Guánica, Puerto Rico 17.907°, -66.885°	14.5 km	-	-	-	✓ Reviewed	USGS →
On October 23, 2025 at 23:46 UTC, a magnitude 2.0 earthquake struck 7 km SSE of Guánica, Puerto Rico. It arrived roughly 19 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 14.5 km, placing this in the shallow crustal category. The epicenter is at 17.907°, -66.885°. 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.
2025-10-23 2025-10-23 23:45:00 UTC	2.6md	1 km ESE of Woodside, CA 37.427°, -122.245°	5.2 km	262	-	-	Auto	USGS →
This magnitude 2.6 event was detected 1 km ESE of Woodside, CA on October 23, 2025, with origin time 23:45 UTC. Of every earthquake currently listed for worldwide seismic activity, this one generated the most felt reports from the public. The USGS received 262 felt reports from nearby residents — a notable response for an event of this magnitude. The hypocenter lay at 5.2 km, placing this in the shallow crustal category. The epicenter is at 37.427°, -122.245°. 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.
2025-10-23 2025-10-23 23:37:42 UTC	2.2md	1 km E of Woodside, CA 37.431°, -122.244°	4.2 km	6	-	-	Auto	USGS →
A magnitude 2.2 seismic event took place 1 km E of Woodside, CA on October 23, 2025 at 23:37 UTC. It arrived roughly 1 hours after a larger magnitude 2.5 mainshock in the same 20 km area, placing it within the typical aftershock window. At a depth of just 4.2 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 (6) submitted felt reports to the USGS. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 37.431°, -122.244°. 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.
2025-10-23 2025-10-23 23:27:41 UTC	2.5md	1 km E of Woodside, CA 37.431°, -122.240°	4.3 km	69	-	-	Auto	USGS →
On October 23, 2025 at 23:27 UTC, a magnitude 2.5 earthquake struck 1 km E of Woodside, CA. In the 72 hours after this event, the USGS recorded 3 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. Nearby residents submitted 69 felt reports to the USGS DYFI platform. At a depth of just 4.3 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 37.431°N, -122.240°E. 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.
2025-10-23 2025-10-23 23:07:17 UTC	4.7mb	231 km ESE of Petropavlovsk-Kamchatsky, Russia 51.968°, 161.524°	10.0 km	-	-	-	✓ Reviewed	USGS →
This magnitude 4.7 event was detected 231 km ESE of Petropavlovsk-Kamchatsky, Russia on October 23, 2025, with origin time 23:07 UTC. The event originated approximately 10.0 km below the surface, classifying it as shallow crustal. The epicenter is at 51.968°, 161.524°. 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.
2025-10-23 2025-10-23 22:36:38 UTC	2.5md	7 km NNW of Lafayette, CA 37.945°, -122.151°	15.6 km	3	-	-	Auto	USGS →
October 23, 2025 brought a magnitude 2.5 earthquake 7 km NNW of Lafayette, CA, logged at 22:36 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. A small number of nearby observers (3) submitted felt reports to the USGS. This was a shallow crustal earthquake, focused at 15.6 km depth. The epicenter is at 37.945°, -122.151°. 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.
2025-10-23 2025-10-23 22:36:29 UTC	2.8md	8 km NNW of Lafayette, CA 37.946°, -122.158°	14.1 km	14	-	-	Auto	USGS →
On October 23, 2025, worldwide seismic activity registered a magnitude 2.8 earthquake 8 km NNW of Lafayette, CA at 22:36 UTC. 14 people reported feeling the earthquake via the USGS Did You Feel It? system. At a depth of 14.1 km, the event was shallow crustal. The epicenter is at 37.946°, -122.158°. 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.
2025-10-23 2025-10-23 22:34:47 UTC	2.2md	1 km E of Woodside, CA 37.431°, -122.242°	4.1 km	7	-	-	Auto	USGS →
On October 23, 2025, worldwide seismic activity registered a magnitude 2.2 earthquake 1 km E of Woodside, CA at 22:34 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 (7) submitted felt reports to the USGS. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 37.431°, -122.242°. 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.
2025-10-23 2025-10-23 22:32:45 UTC	2.0md	1 km E of Woodside, CA 37.429°, -122.242°	4.1 km	-	-	-	Auto	USGS →
A magnitude 2.0 seismic event took place 1 km E of Woodside, CA on October 23, 2025 at 22:32 UTC. In the 72 hours after this event, the USGS recorded 3 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. 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. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 37.429°N, -122.242°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.
2025-10-23 2025-10-23 22:14:25 UTC	4.7mb	120 km ESE of Pondaguitan, Philippines 5.872°, 127.153°	30.3 km	-	-	-	✓ Reviewed	USGS →
Reports of a magnitude 4.7 earthquake 120 km ESE of Pondaguitan, Philippines came in on October 23, 2025 at 22:14 UTC. This was a shallow crustal earthquake, focused at 30.3 km depth. Geolocation places the event at 5.872°N, 127.153°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.
2025-10-23 2025-10-23 22:01:37 UTC	2.2md	10 km WNW of Philadelphia, Tennessee 35.725°, -84.510°	15.1 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 2.2 earthquake 10 km WNW of Philadelphia, Tennessee with origin time 22:01 UTC on October 23, 2025. The hypocenter lay at 15.1 km, placing this in the shallow crustal category. Geolocation places the event at 35.725°N, -84.510°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.
2025-10-23 2025-10-23 21:44:02 UTC	2.2ml	60 km ESE of Pedro Bay, Alaska 59.633°, -153.080°	102.9 km	-	-	-	Auto	USGS →
October 23, 2025 brought a magnitude 2.2 earthquake 60 km ESE of Pedro Bay, Alaska, logged at 21:44 UTC. At a depth of 102.9 km, the event was intermediate depth. Geolocation places the event at 59.633°N, -153.080°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.
2025-10-23 2025-10-23 21:22:01 UTC	4.5mb	29 km NE of San Martín, Argentina -31.242°, -68.287°	109.6 km	1	-	-	✓ Reviewed	USGS →
At 21:22 UTC on October 23, 2025, a magnitude 4.5 tremor occurred 29 km NE of San Martín, Argentina. A small number of nearby observers (1) submitted felt reports to the USGS. The event originated approximately 109.6 km below the surface, classifying it as intermediate depth. The offshore location combined with this depth is characteristic of seismicity along descending slabs. Coordinates: -31.242°, -68.287°. 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.
2025-10-23 2025-10-23 21:16:23 UTC	2.3md	7 km NNW of Lafayette, CA 37.945°, -122.157°	14.7 km	-	-	-	Auto	USGS →
Reports of a magnitude 2.3 earthquake 7 km NNW of Lafayette, CA came in on October 23, 2025 at 21:16 UTC. This was a shallow crustal earthquake, focused at 14.7 km depth. Coordinates: 37.945°, -122.157°. 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.
2025-10-23 2025-10-23 21:09:28 UTC	4.7mwr	85 km E of Tomioka, Japan 37.415°, 141.980°	46.9 km	2	-	-	✓ Reviewed	USGS →
A magnitude 4.7 seismic event took place 85 km E of Tomioka, Japan on October 23, 2025 at 21:09 UTC. A small number of nearby observers (2) submitted felt reports to the USGS. The hypocenter lay at 46.9 km, placing this in the shallow crustal category. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 37.415°, 141.980°. 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.
2025-10-23 2025-10-23 21:02:19 UTC	4.2mb	67 km E of Baculin, Philippines 7.468°, 127.198°	9.2 km	-	-	-	✓ Reviewed	USGS →
A magnitude 4.2 earthquake was recorded 67 km E of Baculin, Philippines on October 23, 2025 at 21:02 UTC. At a depth of 9.2 km, the event was shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 7.468°, 127.198°. 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.
2025-10-23 2025-10-23 20:31:05 UTC	2.6ml	18 km SW of Leilani Estates, Hawaii 19.338°, -155.020°	6.9 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 2.6 earthquake 18 km SW of Leilani Estates, Hawaii at 20:31 UTC on October 23, 2025. This was a shallow crustal earthquake, focused at 6.9 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 19.338°, -155.020°. 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.
2025-10-23 2025-10-23 20:16:53 UTC	2.6ml	22 km ESE of Ruby, Alaska 64.698°, -155.026°	0.0 km	-	-	-	Auto	USGS →
Reports of a magnitude 2.6 earthquake 22 km ESE of Ruby, Alaska came in on October 23, 2025 at 20:16 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 64.698°N, -155.026°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.
2025-10-23 2025-10-23 19:34:59 UTC	3.3ml	24 km SE of Wright, Wyoming 43.605°, -105.265°	0.0 km	-	-	-	✓ Reviewed	USGS →
A magnitude 3.3 seismic event took place 24 km SE of Wright, Wyoming on October 23, 2025 at 19:34 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 43.605°N, -105.265°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-23 2025-10-23 19:26:37 UTC	4.4mb	277 km W of Houma, Tonga -20.871°, -177.950°	475.3 km	-	-	-	✓ Reviewed	USGS →
This magnitude 4.4 event was detected 277 km W of Houma, Tonga on October 23, 2025, with origin time 19:26 UTC. At 475.3 km, this is the deepest earthquake in the current dataset — firmly in the deep-focus category. The offshore location combined with this depth is characteristic of seismicity along descending slabs. Geolocation places the event at -20.871°N, -177.950°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.
2025-10-23 2025-10-23 18:26:21 UTC	2.1md	4 km E of Steele, Missouri 36.084°, -89.781°	5.8 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 2.1 earthquake 4 km E of Steele, Missouri at 18:26 UTC on October 23, 2025. This was a shallow crustal earthquake, focused at 5.8 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 36.084°N, -89.781°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.
2025-10-23 2025-10-23 18:15:02 UTC	2.6ml	5 km NNE of Star Valley Ranch, Wyoming 43.015°, -110.929°	5.0 km	9	-	-	✓ Reviewed	USGS →
A magnitude 2.6 seismic event took place 5 km NNE of Star Valley Ranch, Wyoming on October 23, 2025 at 18:15 UTC. A small number of nearby observers (9) submitted felt reports to the USGS. The event originated approximately 5.0 km below the surface, classifying it as shallow crustal. Coordinates: 43.015°, -110.929°. 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.
2025-10-23 2025-10-23 16:27:54 UTC	4.6mb	78 km S of Sand Point, Alaska 54.642°, -160.304°	35.0 km	-	II	-	✓ Reviewed	USGS →
A magnitude 4.6 earthquake was recorded 78 km S of Sand Point, Alaska on October 23, 2025 at 16:27 UTC. Peak ground motion corresponded to MMI 2.9, classified as weak shaking. This was a shallow crustal earthquake, focused at 35.0 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 54.642°, -160.304°. 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.
2025-10-23 2025-10-23 16:25:45 UTC	2.0ml	59 km N of Petersville, Alaska 63.022°, -150.933°	109.0 km	-	-	-	Auto	USGS →
A magnitude 2.0 earthquake was recorded 59 km N of Petersville, Alaska on October 23, 2025 at 16:25 UTC. At a depth of 109.0 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 63.022°N, -150.933°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.
2025-10-23 2025-10-23 15:09:04 UTC	2.5md	13 km SSE of Maria Antonia, Puerto Rico 17.858°, -66.850°	13.7 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.5 earthquake was recorded 13 km SSE of Maria Antonia, Puerto Rico on October 23, 2025 at 15:09 UTC. Coming 11 hours after a magnitude 2.9 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. At a depth of 13.7 km, the event was shallow crustal. Coordinates: 17.858°, -66.850°. 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.
2025-10-23 2025-10-23 14:52:45 UTC	2.2ml	11 km E of Pāhala, Hawaii 19.209°, -155.366°	30.8 km	-	-	-	✓ Reviewed	USGS →
At 14:52 UTC on October 23, 2025, a magnitude 2.2 tremor occurred 11 km E of Pāhala, Hawaii. The event originated approximately 30.8 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 19.209°, -155.366°. 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.
2025-10-23 2025-10-23 14:25:13 UTC	5.0mb	Falkland Islands region -54.050°, -58.197°	10.0 km	-	-	-	✓ Reviewed	USGS →
At 14:25 UTC on October 23, 2025, a magnitude 5.0 tremor occurred in the Falkland Islands region. It ranks as the fifth largest event in the current dataset. The hypocenter lay at 10.0 km, placing this in the shallow crustal category. Geolocation places the event at -54.050°N, -58.197°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-23 2025-10-23 13:29:44 UTC	3.5ml	237 km SE of Chiniak, Alaska 56.188°, -149.379°	14.1 km	-	I	-	✓ Reviewed	USGS →
Reports of a magnitude 3.5 earthquake 237 km SE of Chiniak, Alaska came in on October 23, 2025 at 13:29 UTC. Maximum shaking intensity peaked at MMI 1.0 (weak). This was a shallow crustal earthquake, focused at 14.1 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 56.188°, -149.379°. 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.
2025-10-23 2025-10-23 13:01:43 UTC	4.2mb	32 km NE of Neiafu, Tonga -18.424°, -173.786°	49.9 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 4.2 earthquake 32 km NE of Neiafu, Tonga with origin time 13:01 UTC on October 23, 2025. The event originated approximately 49.9 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 -18.424°N, -173.786°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.
2025-10-23 2025-10-23 12:58:05 UTC	2.5md	14 km SSE of Maria Antonia, Puerto Rico 17.856°, -66.849°	11.2 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 2.5 earthquake 14 km SSE of Maria Antonia, Puerto Rico with origin time 12:58 UTC on October 23, 2025. It arrived roughly 8 hours after a larger magnitude 2.9 mainshock in the same 20 km area, placing it within the typical aftershock window. The event originated approximately 11.2 km below the surface, classifying it as shallow crustal. The epicenter is at 17.856°, -66.849°. 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.

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 23, 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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