Earthquakes on October 17, 2025: 195 Worldwide, Largest M5.5

Time ↓	Mag ↕	Location ↕	Depth ↕	Felt ↕	MMI	Alert	Status	Details
2025-10-17 2025-10-17 23:56:00 UTC	3.6md	91 km N of Isabela, Puerto Rico 19.326°, -67.064°	29.0 km	-	-	-	✓ Reviewed	USGS →
A magnitude 3.6 seismic event took place 91 km N of Isabela, Puerto Rico on October 17, 2025 at 23:56 UTC. The hypocenter lay at 29.0 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 19.326°, -67.064°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-17 2025-10-17 22:17:56 UTC	2.9ml	112 km E of Chignik, Alaska 56.348°, -156.589°	34.7 km	-	-	-	Auto	USGS →
On October 17, 2025, worldwide seismic activity registered a magnitude 2.9 earthquake 112 km E of Chignik, Alaska at 22:17 UTC. At a depth of 34.7 km, the event was shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 56.348°, -156.589°. The automatic solution is preliminary and may be refined as additional station data arrives. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-17 2025-10-17 21:34:02 UTC	4.4mb	West Chile Rise -43.540°, -82.145°	10.0 km	-	-	-	✓ Reviewed	USGS →
A magnitude 4.4 earthquake was recorded near West Chile Rise on October 17, 2025 at 21:34 UTC. At a depth of 10.0 km, the event was shallow crustal. The epicenter is at -43.540°, -82.145°. 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.
2025-10-17 2025-10-17 20:44:36 UTC	4.3mb	129 km SE of Alo, Wallis and Futuna -15.182°, -177.311°	371.6 km	-	-	-	✓ Reviewed	USGS →
October 17, 2025 brought a magnitude 4.3 earthquake 129 km SE of Alo, Wallis and Futuna, logged at 20:44 UTC. At 371.6 km, this deep-focus earthquake originated far below the brittle crust, deep inside the mantle. The offshore location combined with this depth is characteristic of seismicity along descending slabs. Coordinates: -15.182°, -177.311°. 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.
2025-10-17 2025-10-17 20:30:02 UTC	4.1mb	226 km SSE of Amahai, Indonesia -5.218°, 129.743°	236.9 km	-	-	-	✓ Reviewed	USGS →
At 20:30 UTC on October 17, 2025, a magnitude 4.1 tremor occurred 226 km SSE of Amahai, Indonesia. The hypocenter lay at 236.9 km, placing this in the intermediate depth category. Coordinates: -5.218°, 129.743°. 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.
2025-10-17 2025-10-17 20:28:15 UTC	4.6mb	Izu Islands, Japan region 29.828°, 139.059°	425.9 km	-	-	-	✓ Reviewed	USGS →
A magnitude 4.6 earthquake was recorded in the Izu Islands, Japan region on October 17, 2025 at 20:28 UTC. At 425.9 km, this deep-focus earthquake originated far below the brittle crust, deep inside the mantle. Coordinates: 29.828°, 139.059°. 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.
2025-10-17 2025-10-17 20:25:43 UTC	3.4ml	57 km NNE of Petersville, Alaska 62.977°, -150.331°	104.6 km	-	-	-	Auto	USGS →
On October 17, 2025 at 20:25 UTC, a magnitude 3.4 earthquake struck 57 km NNE of Petersville, Alaska. The event originated approximately 104.6 km below the surface, classifying it as intermediate depth. Coordinates: 62.977°, -150.331°. The automatic solution is preliminary and may be refined as additional station data arrives. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-17 2025-10-17 20:00:29 UTC	4.4mb	21 km NW of Davila, Philippines 18.622°, 120.454°	23.2 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 4.4 earthquake 21 km NW of Davila, Philippines with origin time 20:00 UTC on October 17, 2025. This event falls inside the aftershock decay of a nearby magnitude 4.9 earthquake that occurred about 11 hours earlier. The event originated approximately 23.2 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 18.622°N, 120.454°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.
2025-10-17 2025-10-17 19:49:32 UTC	2.2ml	11 km S of Holtville, CA 32.711°, -115.368°	15.5 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.2 seismic event took place 11 km S of Holtville, CA on October 17, 2025 at 19:49 UTC. The event originated approximately 15.5 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 32.711°, -115.368°. 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.
2025-10-17 2025-10-17 19:27:10 UTC	4.2mb	69 km SSW of Severo-Kuril’sk, Russia 50.064°, 155.915°	88.2 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 4.2 earthquake 69 km SSW of Severo-Kuril’sk, Russia with origin time 19:27 UTC on October 17, 2025. Coming 15 hours after a magnitude 4.4 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The hypocenter lay at 88.2 km, placing this in the intermediate depth category. Coordinates: 50.064°, 155.915°. 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.
2025-10-17 2025-10-17 18:51:19 UTC	3.0ml	11 km NNE of Black Forest, Colorado 39.110°, -104.663°	7.2 km	11	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 3.0 earthquake 11 km NNE of Black Forest, Colorado with origin time 18:51 UTC on October 17, 2025. Nearby residents submitted 11 felt reports to the USGS DYFI platform. The hypocenter lay at 7.2 km, placing this in the shallow crustal category. Geolocation places the event at 39.110°N, -104.663°E. 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.
2025-10-17 2025-10-17 18:20:39 UTC	2.4ml	77 km NE of Tonopah, Nevada 38.457°, -116.498°	3.4 km	-	-	-	✓ Reviewed	USGS →
At 18:20 UTC on October 17, 2025, a magnitude 2.4 tremor occurred 77 km NE of Tonopah, Nevada. At a depth of just 3.4 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 38.457°N, -116.498°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.
2025-10-17 2025-10-17 17:57:50 UTC	4.4mb	106 km ENE of Petropavlovsk-Kamchatsky, Russia 53.448°, 160.092°	66.2 km	-	-	-	✓ Reviewed	USGS →
On October 17, 2025, worldwide seismic activity registered a magnitude 4.4 earthquake 106 km ENE of Petropavlovsk-Kamchatsky, Russia at 17:57 UTC. This was a shallow crustal earthquake, focused at 66.2 km depth. Coordinates: 53.448°, 160.092°. 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.
2025-10-17 2025-10-17 17:47:23 UTC	2.9ml	1 km W of Girdwood, Alaska 60.944°, -149.203°	19.2 km	3	II	-	✓ Reviewed	USGS →
At 17:47 UTC on October 17, 2025, a magnitude 2.9 tremor occurred 1 km W of Girdwood, Alaska. Maximum shaking intensity peaked at MMI 2.4 (weak). A small number of nearby observers (3) submitted felt reports to the USGS. The event originated approximately 19.2 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 60.944°, -149.203°. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-17 2025-10-17 17:43:54 UTC	2.0ml	0 km WNW of Girdwood, Alaska 60.944°, -149.182°	25.9 km	-	-	-	Auto	USGS →
Seismographs logged a magnitude 2.0 earthquake 0 km WNW of Girdwood, Alaska with origin time 17:43 UTC on October 17, 2025. The event originated approximately 25.9 km below the surface, classifying it as shallow crustal. Geolocation places the event at 60.944°N, -149.182°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.
2025-10-17 2025-10-17 17:37:34 UTC	4.2mb	Fiji region -19.885°, -178.054°	477.9 km	-	-	-	✓ Reviewed	USGS →
On October 17, 2025, worldwide seismic activity registered a magnitude 4.2 earthquake in the Fiji region at 17:37 UTC. At 477.9 km, this deep-focus earthquake originated far below the brittle crust, deep inside the mantle. The epicenter is at -19.885°, -178.054°. 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.
2025-10-17 2025-10-17 17:21:29 UTC	2.5md	13 km ESE of Covelo, CA 39.763°, -123.100°	0.9 km	-	-	-	Auto	USGS →
On October 17, 2025 at 17:21 UTC, a magnitude 2.5 earthquake struck 13 km ESE of Covelo, CA. At a depth of just 0.9 km, this was a very shallow event, close enough to the surface that modest magnitudes can produce significant local shaking. The epicenter is at 39.763°, -123.100°. 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.
2025-10-17 2025-10-17 16:39:18 UTC	3.9mb	22 km N of Yangon, Burma (Myanmar) 17.008°, 96.166°	10.0 km	-	-	-	✓ Reviewed	USGS →
Reports of a magnitude 3.9 earthquake 22 km N of Yangon, Burma (Myanmar) came in on October 17, 2025 at 16:39 UTC. 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. Coordinates: 17.008°, 96.166°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M3.9 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-17 2025-10-17 15:48:49 UTC	5.1mww	49 km S of Akutan, Alaska 53.688°, -165.843°	85.1 km	20	III	-	✓ Reviewed	USGS →
A magnitude 5.1 earthquake was recorded 49 km S of Akutan, Alaska on October 17, 2025 at 15:48 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 20 felt reports to the USGS DYFI platform. On the Modified Mercalli scale, shaking reached 3.4 — considered light. It ranks as the second largest event in the current dataset. At a depth of 85.1 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 53.688°N, -165.843°E. See the M5.1 event page for the full report, ShakeMap, and citizen-reported intensity data.
2025-10-17 2025-10-17 15:33:08 UTC	4.0mb	88 km E of La Tirana, Chile -20.429°, -68.814°	105.9 km	-	-	-	✓ Reviewed	USGS →
This magnitude 4.0 event was detected 88 km E of La Tirana, Chile on October 17, 2025, with origin time 15:33 UTC. The event originated approximately 105.9 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 -20.429°N, -68.814°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.
2025-10-17 2025-10-17 15:17:05 UTC	2.2ml	42 km NNW of Glacier View, Alaska 62.158°, -147.973°	20.1 km	-	-	-	Auto	USGS →
At 15:17 UTC on October 17, 2025, a magnitude 2.2 tremor occurred 42 km NNW of Glacier View, Alaska. The event originated approximately 20.1 km below the surface, classifying it as shallow crustal. Coordinates: 62.158°, -147.973°. 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.
2025-10-17 2025-10-17 14:50:16 UTC	4.5mb	43 km E of Khandūd, Afghanistan 36.932°, 72.806°	10.0 km	-	-	-	✓ Reviewed	USGS →
Reports of a magnitude 4.5 earthquake 43 km E of Khandūd, Afghanistan came in on October 17, 2025 at 14:50 UTC. Coming 3 hours after a magnitude 5.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. 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. Coordinates: 36.932°, 72.806°. 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.
2025-10-17 2025-10-17 14:36:28 UTC	2.2ml	3 km SW of Pāhala, Hawaii 19.180°, -155.496°	34.3 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.2 earthquake was recorded 3 km SW of Pāhala, Hawaii on October 17, 2025 at 14:36 UTC. This was a shallow crustal earthquake, focused at 34.3 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 19.180°, -155.496°. 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.
2025-10-17 2025-10-17 14:35:42 UTC	2.5ml	69 km NE of Ambler, Alaska 67.605°, -156.961°	0.0 km	-	-	-	Auto	USGS →
October 17, 2025 brought a magnitude 2.5 earthquake 69 km NE of Ambler, Alaska, logged at 14:35 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: 67.605°, -156.961°. 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.
2025-10-17 2025-10-17 14:32:58 UTC	2.4ml	37 km NW of Mentasta Lake, Alaska 63.125°, -144.361°	4.4 km	-	-	-	Auto	USGS →
A magnitude 2.4 earthquake was recorded 37 km NW of Mentasta Lake, Alaska on October 17, 2025 at 14:32 UTC. At a depth of just 4.4 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 63.125°N, -144.361°E. 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.
2025-10-17 2025-10-17 14:22:56 UTC	4.6mb	106 km SSE of Kokopo, Papua New Guinea -5.171°, 152.750°	35.0 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 4.6 earthquake 106 km SSE of Kokopo, Papua New Guinea with origin time 14:22 UTC on October 17, 2025. The hypocenter lay at 35.0 km, placing this in the shallow crustal category. The epicenter is at -5.171°, 152.750°. 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.
2025-10-17 2025-10-17 14:11:09 UTC	4.7mb	270 km ESE of Ust’-Kamchatsk Staryy, Russia 55.376°, 166.516°	10.0 km	-	-	-	✓ Reviewed	USGS →
A magnitude 4.7 seismic event took place 270 km ESE of Ust’-Kamchatsk Staryy, Russia on October 17, 2025 at 14:11 UTC. The hypocenter lay at 10.0 km, placing this in the shallow crustal category. Coordinates: 55.376°, 166.516°. 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.
2025-10-17 2025-10-17 13:35:24 UTC	4.5mb	20 km SSW of Barra de Tecoanapa, Mexico 16.354°, -98.831°	10.0 km	-	-	-	✓ Reviewed	USGS →
A magnitude 4.5 seismic event took place 20 km SSW of Barra de Tecoanapa, Mexico on October 17, 2025 at 13:35 UTC. The event originated approximately 10.0 km below the surface, classifying it as shallow crustal. The epicenter is at 16.354°, -98.831°. 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.
2025-10-17 2025-10-17 13:20:47 UTC	2.3ml	49 km NW of Toyah, Texas 31.602°, -104.192°	6.1 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.3 seismic event took place 49 km NW of Toyah, Texas on October 17, 2025 at 13:20 UTC. The hypocenter lay at 6.1 km, placing this in the shallow crustal category. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 31.602°, -104.192°. 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.
2025-10-17 2025-10-17 12:15:03 UTC	5.5mww	48 km ESE of Khandūd, Afghanistan 36.757°, 72.806°	8.0 km	1	VI	green	✓ Reviewed	USGS →
On October 17, 2025 at 12:15 UTC, a magnitude 5.5 earthquake struck 48 km ESE of Khandūd, Afghanistan. Maximum shaking intensity peaked at MMI 6.4 (very strong). 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 October 17, 2025. A small number of nearby observers (1) submitted felt reports to the USGS. The hypocenter lay at 8.0 km, placing this in the shallow crustal category. The epicenter is at 36.757°, 72.806°. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M5.5 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 17, 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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