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 →
At 23:56 UTC on February 23, 2026, a magnitude 2.2 tremor occurred 6 km ESE of Ratliff City, Oklahoma. This event falls inside the aftershock decay of a nearby magnitude 3.0 earthquake that occurred about 19 hours earlier. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. 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 →
Reports of a magnitude 2.5 earthquake 94 km SW of Nikolski, Alaska came in on February 23, 2026 at 23:50 UTC. 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 was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-02-23 2026-02-23 23:36:37 UTC	2.1md	14 km W of Clayton, Idaho 44.276°, -114.575°	-1.9 km	-	-	-	✓ Reviewed	USGS →
On February 23, 2026, worldwide seismic activity registered a magnitude 2.1 earthquake 14 km W of Clayton, Idaho at 23:36 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.1 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 →
February 23, 2026 brought a magnitude 3.1 earthquake 82 km SW of Nikolski, Alaska, logged at 23:33 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. The event was offshore. 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 →
At 23:27 UTC on February 23, 2026, a magnitude 2.7 tremor occurred 94 km NW of Lake Minchumina, Alaska. This event falls inside the aftershock decay of a nearby magnitude 2.9 earthquake that occurred about 10 hours earlier. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-02-23 2026-02-23 23:26:19 UTC	2.2ml	32 km NNW of Hope, Canada 49.630°, -121.691°	3.8 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 2.2 earthquake 32 km NNW of Hope, Canada at 23:26 UTC on February 23, 2026. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.2 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 →
This magnitude 2.1 event was detected 12 km NE of Pāhala, Hawaii on February 23, 2026, with origin time 23:23 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.5 earthquake that occurred about 22 hours earlier. The event was offshore. 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. The event was offshore. 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. The event was offshore. 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 →
February 23, 2026 brought a magnitude 2.0 earthquake 20 km N of Meadow Lakes, Alaska, logged at 22:59 UTC. The event was offshore. 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 was offshore. 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 →
A magnitude 2.5 seismic event took place 90 km SW of Nikolski, Alaska on February 23, 2026 at 22:54 UTC. This event falls inside the aftershock decay of a nearby magnitude 6.0 earthquake that occurred about 18 hours earlier. The event was offshore. 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 →
At 22:49 UTC on February 23, 2026, a magnitude 3.2 tremor occurred 80 km SW of Nikolski, Alaska. It arrived roughly 13 hours after a larger magnitude 5.5 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. 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 →
The USGS recorded this magnitude 2.7 earthquake 83 km SW of Nikolski, Alaska at 22:44 UTC on February 23, 2026. 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 was offshore. 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 event was offshore. 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 →
A magnitude 2.3 seismic event took place 34 km SE of Malaga, New Mexico on February 23, 2026 at 22:25 UTC. The event was offshore. 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 →
A magnitude 2.6 seismic event took place 75 km SW of Nikolski, Alaska on February 23, 2026 at 22:17 UTC. 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. The event was offshore. 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 →
February 23, 2026 brought a magnitude 2.3 earthquake 49 km WSW of Cantwell, Alaska, logged at 22:12 UTC. 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. The event was offshore. 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 →
Seismographs logged a magnitude 3.0 earthquake 184 km SSE of Akutan, Alaska with origin time 22:04 UTC on February 23, 2026. 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 →
This magnitude 2.9 event was detected 89 km SW of Nikolski, Alaska on February 23, 2026, with origin time 22:01 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. The event was offshore. 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 →
February 23, 2026 brought a magnitude 2.6 earthquake 81 km SW of Nikolski, Alaska, logged at 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 was offshore. 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. The event was offshore. 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 →
The USGS recorded this magnitude 3.2 earthquake 83 km SW of Nikolski, Alaska at 21:42 UTC on February 23, 2026. This event falls inside the aftershock decay of a nearby magnitude 6.0 earthquake that occurred about 17 hours earlier. The event was offshore. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data.
2026-02-23 2026-02-23 21:41:48 UTC	2.5ml	80 km SW of Nikolski, Alaska 52.486°, -169.797°	13.3 km	-	-	-	✓ Reviewed	USGS →
February 23, 2026 brought a magnitude 2.5 earthquake 80 km SW of Nikolski, Alaska, logged at 21:41 UTC. Coming 17 hours after a magnitude 6.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.5 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 →
Reports of a magnitude 2.0 earthquake 3 km SE of Tallaboa Alta, Puerto Rico came in on February 23, 2026 at 21:30 UTC. The event was offshore. 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. The event was offshore. 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 →
On February 23, 2026, worldwide seismic activity registered a magnitude 3.0 earthquake 76 km SW of Nikolski, Alaska at 21:24 UTC. Coming 11 hours after a magnitude 5.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. 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 →
Reports of a magnitude 2.1 earthquake 40 km N of Chase, Alaska came in on February 23, 2026 at 21:20 UTC. The event was offshore. 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 →
This magnitude 3.3 event was detected 89 km SW of Nikolski, Alaska on February 23, 2026, with origin time 21:15 UTC. This event falls inside the aftershock decay of a nearby magnitude 6.0 earthquake that occurred about 16 hours earlier. The event was offshore. See the M3.3 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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