Earthquakes on February 23, 2026: 421 Worldwide, Largest M6.0

Time ↓	Mag ↕	Location ↕	Depth ↕	Felt ↕	MMI	Alert	Status	Details
2026-02-23 2026-02-23 23:56:04 UTC	2.2ml	6 km ESE of Ratliff City, Oklahoma 34.420°, -97.442°	4.6 km	-	-	-	✓ Reviewed	USGS →
February 23, 2026 brought a magnitude 2.2 earthquake 6 km ESE of Ratliff City, Oklahoma, logged at 23:56 UTC. Coming 19 hours after a magnitude 3.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. At a depth of just 4.6 km, this was a very shallow event, close enough to the surface that modest magnitudes can produce significant local shaking. Coordinates: 34.420°, -97.442°. 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.
2026-02-23 2026-02-23 23:50:27 UTC	2.5ml	94 km SW of Nikolski, Alaska 52.377°, -169.906°	7.5 km	-	-	-	✓ Reviewed	USGS →
At 23:50 UTC on February 23, 2026, a magnitude 2.5 tremor occurred 94 km SW of Nikolski, Alaska. It arrived roughly 19 hours after a larger magnitude 6.0 mainshock in the same 20 km area, placing it within the typical aftershock window. The event originated approximately 7.5 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 52.377°, -169.906°. 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.
2026-02-23 2026-02-23 23:33:59 UTC	3.1ml	82 km SW of Nikolski, Alaska 52.481°, -169.816°	10.0 km	-	-	-	✓ Reviewed	USGS →
A magnitude 3.1 seismic event took place 82 km SW of Nikolski, Alaska on February 23, 2026 at 23:33 UTC. Coming 18 hours after a magnitude 6.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. 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: 52.481°, -169.816°. 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.
2026-02-23 2026-02-23 23:27:29 UTC	2.7ml	94 km NW of Lake Minchumina, Alaska 64.559°, -153.477°	4.3 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 2.7 earthquake 94 km NW of Lake Minchumina, Alaska with origin time 23:27 UTC on February 23, 2026. Coming 10 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 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. Coordinates: 64.559°, -153.477°. 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.
2026-02-23 2026-02-23 23:23:13 UTC	2.1ml	12 km NE of Pāhala, Hawaii 19.272°, -155.387°	29.7 km	1	-	-	✓ Reviewed	USGS →
On February 23, 2026 at 23:23 UTC, a magnitude 2.1 earthquake struck 12 km NE of Pāhala, Hawaii. This event falls inside the aftershock decay of a nearby magnitude 2.5 earthquake that occurred about 22 hours earlier. A small number of nearby observers (1) submitted felt reports to the USGS. The hypocenter lay at 29.7 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 19.272°N, -155.387°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.
2026-02-23 2026-02-23 23:14:30 UTC	3.8mb	87 km SW of Nikolski, Alaska 52.353°, -169.733°	10.0 km	-	II	-	✓ Reviewed	USGS →
On February 23, 2026, worldwide seismic activity registered a magnitude 3.8 earthquake 87 km SW of Nikolski, Alaska at 23:14 UTC. Coming 18 hours after a magnitude 6.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. Peak ground motion corresponded to MMI 2.6, classified as weak shaking. 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: 52.353°, -169.733°. 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.
2026-02-23 2026-02-23 23:03:41 UTC	4.8mww	7 km E of Nanao, Japan 37.038°, 137.044°	259.4 km	-	-	-	✓ Reviewed	USGS →
At 23:03 UTC on February 23, 2026, a magnitude 4.8 tremor occurred 7 km E of Nanao, Japan. It ranks as the fifth largest event in the current dataset. The hypocenter lay at 259.4 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 37.038°N, 137.044°E. The solution has been reviewed by a USGS seismologist and is considered finalized. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-02-23 2026-02-23 22:59:37 UTC	2.0ml	20 km N of Meadow Lakes, Alaska 61.812°, -149.615°	28.5 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.0 earthquake was recorded 20 km N of Meadow Lakes, Alaska on February 23, 2026 at 22:59 UTC. This was a shallow crustal earthquake, focused at 28.5 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 61.812°, -149.615°. 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.
2026-02-23 2026-02-23 22:54:25 UTC	4.2mb	57 km S of Shikotan, Russia 43.288°, 146.805°	35.0 km	-	-	-	✓ Reviewed	USGS →
At 22:54 UTC on February 23, 2026, a magnitude 4.2 tremor occurred 57 km S of Shikotan, Russia. 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. Geolocation places the event at 43.288°N, 146.805°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.
2026-02-23 2026-02-23 22:54:07 UTC	2.5ml	90 km SW of Nikolski, Alaska 52.455°, -169.941°	16.4 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 2.5 earthquake 90 km SW of Nikolski, Alaska at 22:54 UTC on February 23, 2026. This event falls inside the aftershock decay of a nearby magnitude 6.0 earthquake that occurred about 18 hours earlier. This was a shallow crustal earthquake, focused at 16.4 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 52.455°N, -169.941°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.
2026-02-23 2026-02-23 22:49:59 UTC	3.2ml	80 km SW of Nikolski, Alaska 52.508°, -169.824°	16.7 km	-	-	-	✓ Reviewed	USGS →
On February 23, 2026, worldwide seismic activity registered a magnitude 3.2 earthquake 80 km SW of Nikolski, Alaska at 22:49 UTC. Coming 13 hours after a magnitude 5.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. This was a shallow crustal earthquake, focused at 16.7 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Coordinates: 52.508°, -169.824°. 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.
2026-02-23 2026-02-23 22:44:40 UTC	2.7ml	83 km SW of Nikolski, Alaska 52.389°, -169.700°	10.0 km	-	-	-	✓ Reviewed	USGS →
On February 23, 2026, worldwide seismic activity registered a magnitude 2.7 earthquake 83 km SW of Nikolski, Alaska at 22:44 UTC. It arrived roughly 18 hours after a larger magnitude 6.0 mainshock in the same 20 km area, placing it within the typical aftershock window. 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. The epicenter is at 52.389°, -169.700°. 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.
2026-02-23 2026-02-23 22:34:21 UTC	4.5mb	59 km SE of Shimoda, Japan 34.329°, 139.445°	139.8 km	-	-	-	✓ Reviewed	USGS →
This magnitude 4.5 event was detected 59 km SE of Shimoda, Japan on February 23, 2026, with origin time 22:34 UTC. The hypocenter lay at 139.8 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 34.329°N, 139.445°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.
2026-02-23 2026-02-23 22:25:03 UTC	2.3ml	34 km SE of Malaga, New Mexico 32.003°, -103.809°	8.0 km	-	-	-	✓ Reviewed	USGS →
On February 23, 2026, worldwide seismic activity registered a magnitude 2.3 earthquake 34 km SE of Malaga, New Mexico at 22:25 UTC. At a depth of 8.0 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 32.003°N, -103.809°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.
2026-02-23 2026-02-23 22:17:19 UTC	2.6ml	75 km SW of Nikolski, Alaska 52.525°, -169.743°	9.9 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 2.6 earthquake 75 km SW of Nikolski, Alaska at 22:17 UTC on February 23, 2026. It arrived roughly 12 hours after a larger magnitude 5.5 mainshock in the same 20 km area, placing it within the typical aftershock window. At a depth of 9.9 km, the event was shallow crustal. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 52.525°, -169.743°. 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.
2026-02-23 2026-02-23 22:12:52 UTC	2.3ml	49 km WSW of Cantwell, Alaska 63.179°, -149.812°	100.5 km	-	-	-	✓ Reviewed	USGS →
At 22:12 UTC on February 23, 2026, a magnitude 2.3 tremor occurred 49 km WSW of Cantwell, Alaska. The event originated approximately 100.5 km below the surface, classifying it as intermediate depth. Coordinates: 63.179°, -149.812°. 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.
2026-02-23 2026-02-23 22:12:22 UTC	4.1mb	88 km SW of Nikolski, Alaska 52.373°, -169.772°	10.0 km	-	II	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 4.1 earthquake 88 km SW of Nikolski, Alaska with origin time 22:12 UTC on February 23, 2026. It arrived roughly 17 hours after a larger magnitude 6.0 mainshock in the same 20 km area, placing it within the typical aftershock window. Maximum shaking intensity peaked at MMI 2.4 (weak). 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. The epicenter is at 52.373°, -169.772°. 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.
2026-02-23 2026-02-23 22:04:48 UTC	3.0ml	184 km SSE of Akutan, Alaska 52.630°, -164.606°	10.0 km	-	-	-	✓ Reviewed	USGS →
A magnitude 3.0 earthquake was recorded 184 km SSE of Akutan, Alaska on February 23, 2026 at 22:04 UTC. This was a shallow crustal earthquake, focused at 10.0 km depth. The epicenter is at 52.630°, -164.606°. 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.
2026-02-23 2026-02-23 22:01:37 UTC	2.9ml	89 km SW of Nikolski, Alaska 52.461°, -169.919°	21.3 km	-	-	-	✓ Reviewed	USGS →
At 22:01 UTC on February 23, 2026, a magnitude 2.9 tremor occurred 89 km SW of Nikolski, Alaska. This event falls inside the aftershock decay of a nearby magnitude 6.0 earthquake that occurred about 17 hours earlier. The hypocenter lay at 21.3 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 52.461°N, -169.919°E. 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.
2026-02-23 2026-02-23 21:49:12 UTC	2.6ml	81 km SW of Nikolski, Alaska 52.440°, -169.750°	15.5 km	-	-	-	✓ Reviewed	USGS →
This magnitude 2.6 event was detected 81 km SW of Nikolski, Alaska on February 23, 2026, with origin time 21:49 UTC. This event falls inside the aftershock decay of a nearby magnitude 6.0 earthquake that occurred about 17 hours earlier. 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. Geolocation places the event at 52.440°N, -169.750°E. 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.
2026-02-23 2026-02-23 21:45:53 UTC	3.5ml	81 km SW of Nikolski, Alaska 52.502°, -169.834°	21.9 km	-	II	-	✓ Reviewed	USGS →
On February 23, 2026, worldwide seismic activity registered a magnitude 3.5 earthquake 81 km SW of Nikolski, Alaska at 21:45 UTC. It arrived roughly 17 hours after a larger magnitude 6.0 mainshock in the same 20 km area, placing it within the typical aftershock window. Maximum shaking intensity peaked at MMI 2.1 (weak). This was a shallow crustal earthquake, focused at 21.9 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 52.502°, -169.834°. 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.
2026-02-23 2026-02-23 21:42:47 UTC	3.2ml	83 km SW of Nikolski, Alaska 52.479°, -169.835°	13.1 km	-	-	-	✓ Reviewed	USGS →
At 21:42 UTC on February 23, 2026, a magnitude 3.2 tremor occurred 83 km SW of Nikolski, Alaska. It arrived roughly 17 hours after a larger magnitude 6.0 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 event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 52.479°, -169.835°. 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.
2026-02-23 2026-02-23 21:30:17 UTC	2.0md	3 km SE of Tallaboa Alta, Puerto Rico 18.032°, -66.670°	16.0 km	-	-	-	✓ Reviewed	USGS →
February 23, 2026 brought a magnitude 2.0 earthquake 3 km SE of Tallaboa Alta, Puerto Rico, logged at 21:30 UTC. At a depth of 16.0 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 18.032°N, -66.670°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.
2026-02-23 2026-02-23 21:29:00 UTC	4.1mb	87 km SW of Nikolski, Alaska 52.410°, -169.825°	6.3 km	-	II	-	✓ Reviewed	USGS →
On February 23, 2026, worldwide seismic activity registered a magnitude 4.1 earthquake 87 km SW of Nikolski, Alaska at 21:29 UTC. This event falls inside the aftershock decay of a nearby magnitude 6.0 earthquake that occurred about 16 hours earlier. On the Modified Mercalli scale, shaking reached 2.8 — considered weak. This was a shallow crustal earthquake, focused at 6.3 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. Geolocation places the event at 52.410°N, -169.825°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.
2026-02-23 2026-02-23 21:24:24 UTC	3.0ml	76 km SW of Nikolski, Alaska 52.522°, -169.760°	25.1 km	-	-	-	✓ Reviewed	USGS →
Seismographs logged a magnitude 3.0 earthquake 76 km SW of Nikolski, Alaska with origin time 21:24 UTC on February 23, 2026. This event falls inside the aftershock decay of a nearby magnitude 5.5 earthquake that occurred about 11 hours earlier. The hypocenter lay at 25.1 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 52.522°N, -169.760°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.
2026-02-23 2026-02-23 21:20:33 UTC	2.1ml	40 km N of Chase, Alaska 62.809°, -149.963°	77.7 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.1 earthquake was recorded 40 km N of Chase, Alaska on February 23, 2026 at 21:20 UTC. At a depth of 77.7 km, the event was intermediate depth. The offshore location combined with this depth is characteristic of seismicity along descending slabs. Coordinates: 62.809°, -149.963°. 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.
2026-02-23 2026-02-23 21:15:26 UTC	3.3ml	89 km SW of Nikolski, Alaska 52.391°, -169.830°	14.3 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 3.3 earthquake 89 km SW of Nikolski, Alaska at 21:15 UTC on February 23, 2026. It arrived roughly 16 hours after a larger magnitude 6.0 mainshock in the same 20 km area, placing it within the typical aftershock window. This was a shallow crustal earthquake, focused at 14.3 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 52.391°, -169.830°. 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.
2026-02-23 2026-02-23 21:11:06 UTC	4.1mb	91 km SW of Nikolski, Alaska 52.361°, -169.818°	10.0 km	-	II	-	✓ Reviewed	USGS →
At 21:11 UTC on February 23, 2026, a magnitude 4.1 tremor occurred 91 km SW of Nikolski, Alaska. Coming 16 hours after a magnitude 6.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. Peak ground motion corresponded to MMI 2.9, classified as weak shaking. 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. Coordinates: 52.361°, -169.818°. 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.
2026-02-23 2026-02-23 20:52:32 UTC	4.4mb	40 km ESE of Mungaa, Tanzania -5.122°, 35.216°	10.0 km	2	-	-	✓ Reviewed	USGS →
February 23, 2026 brought a magnitude 4.4 earthquake 40 km ESE of Mungaa, Tanzania, logged at 20:52 UTC. A small number of nearby observers (2) submitted felt reports to the USGS. This was a shallow crustal earthquake, focused at 10.0 km depth. Geolocation places the event at -5.122°N, 35.216°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.
2026-02-23 2026-02-23 20:46:55 UTC	2.3ml	98 km S of Sand Point, Alaska 54.451°, -160.564°	12.0 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 2.3 earthquake 98 km S of Sand Point, Alaska at 20:46 UTC on February 23, 2026. It arrived roughly 3 hours after a larger magnitude 2.4 mainshock in the same 20 km area, placing it within the typical aftershock window. This was a shallow crustal earthquake, focused at 12.0 km depth. The event was offshore — common for earthquakes along subduction zones and transform plate boundaries. The epicenter is at 54.451°, -160.564°. 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 February 23, 2026. 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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