Earthquakes on February 23, 2021
291
EARTHQUAKES on February 23, 2021
24-hour UTC period · USGS data
LARGEST: M5.2 — South Sandwich Islands region
54 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
4
M4.0–4.9
33
M3.0–3.9
9
M2.0–2.9
61
M1.0–1.9
184
Activity Summary
291
Total earthquakes
~250
Daily average
Normal
Activity level
4
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.2
South Sandwich Islands region
05:19 UTC · 54.1 km deep
5.1
182 km NW of Tobelo, Indonesia
22:25 UTC · 65.4 km deep
5.1
206 km WSW of Riverton, New Zealand
04:07 UTC · 32.0 km deep
Felt by 16
5.0
54 km ENE of Port-Olry, Vanuatu
22:06 UTC · 128.8 km deep
4.9
184 km ESE of Alo, Wallis and Futuna
20:51 UTC · 10.0 km deep
4.9
117 km E of Alo, Wallis and Futuna
20:44 UTC · 10.0 km deep
4.9
72 km S of San Francisco del Mar Viejo, Mexico
09:30 UTC · 28.9 km deep
Felt by 5
4.7
southeast of the Loyalty Islands
21:37 UTC · 10.0 km deep
Earthquake Map — February 23, 2021
All Earthquakes — February 23, 2021
Showing 30 of 107 (filtered from 291)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-02-23 2021-02-23 23:36:35 UTC | 2.8ml | 106 km SSE of Sand Point, Alaska 54.480°, -159.767° | 21.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.8 seismic event took place 106 km SSE of Sand Point, Alaska on February 23, 2021 at 23:36 UTC. It arrived roughly 1 hours after a larger magnitude 3.0 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 23:18:07 UTC | 4.3mb | 79 km S of Bambanglipuro, Indonesia -8.667°, 110.290° | 59.2 km | - | - | - | ✓ Reviewed | USGS → |
At 23:18 UTC on February 23, 2021, a magnitude 4.3 tremor occurred 79 km S of Bambanglipuro, Indonesia. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 23:05:56 UTC | 2.2ml | 19 km WNW of Stanley, Idaho 44.275°, -115.171° | 8.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 19 km WNW of Stanley, Idaho on February 23, 2021 at 23:05 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.5 earthquake that occurred about 1 hours earlier. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 23:04:24 UTC | 4.4mb | 59 km E of Lospalos, Timor Leste -8.600°, 127.534° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.4 event was detected 59 km E of Lospalos, Timor Leste on February 23, 2021, with origin time 23:04 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 22:58:46 UTC | 2.1ml | 20 km WNW of Stanley, Idaho 44.274°, -115.177° | 9.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 20 km WNW of Stanley, Idaho on February 23, 2021 at 22:58 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.5 earthquake that occurred about 1 hours earlier. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 22:57:46 UTC | 2.3ml | 3 km SW of Mill Creek, Oklahoma 34.377°, -96.852° | 0.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 seismic event took place 3 km SW of Mill Creek, Oklahoma on February 23, 2021 at 22:57 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 22:56:44 UTC | 2.5ml | 19 km WNW of Stanley, Idaho 44.267°, -115.173° | 11.3 km | 2 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 seismic event took place 19 km WNW of Stanley, Idaho on February 23, 2021 at 22:56 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 22:53:44 UTC | 2.1md | 16km SE of Pinnacles, CA 36.435°, -121.008° | 0.9 km | - | - | - | ✓ Reviewed | USGS → |
On February 23, 2021, worldwide seismic activity registered a magnitude 2.1 earthquake 16km SE of Pinnacles, CA at 22:53 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. | ||||||||
2021-02-23 2021-02-23 22:41:34 UTC | 3.0ml | 108 km SSE of Sand Point, Alaska 54.448°, -159.794° | 21.2 km | - | - | - | ✓ Reviewed | USGS → |
On February 23, 2021, worldwide seismic activity registered a magnitude 3.0 earthquake 108 km SSE of Sand Point, Alaska at 22:41 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 22:33:40 UTC | 4.0mb | 186 km SSE of Unalaska, Alaska 52.257°, -165.824° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.0 earthquake 186 km SSE of Unalaska, Alaska at 22:33 UTC on February 23, 2021. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 22:25:54 UTC | 5.1mww | 182 km NW of Tobelo, Indonesia 3.055°, 127.036° | 65.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 5.1 earthquake was recorded 182 km NW of Tobelo, Indonesia on February 23, 2021 at 22:25 UTC. The event was offshore. See the M5.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 22:13:15 UTC | 2.3ml | 43 km SE of Beatty, Nevada 36.648°, -116.392° | 7.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 seismic event took place 43 km SE of Beatty, Nevada on February 23, 2021 at 22:13 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 22:12:13 UTC | 4.6mb | 70 km S of Sola, Vanuatu -14.511°, 167.532° | 207.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.6 seismic event took place 70 km S of Sola, Vanuatu on February 23, 2021 at 22:12 UTC. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 22:06:43 UTC | 5.0mb | 54 km ENE of Port-Olry, Vanuatu -14.791°, 167.513° | 128.8 km | - | - | - | ✓ Reviewed | USGS → |
On February 23, 2021, worldwide seismic activity registered a magnitude 5.0 earthquake 54 km ENE of Port-Olry, Vanuatu at 22:06 UTC. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 22:02:17 UTC | 2.6ml | 114 km SSE of Sand Point, Alaska 54.415°, -159.723° | 27.3 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.6 earthquake 114 km SSE of Sand Point, Alaska at 22:02 UTC on February 23, 2021. This event falls inside the aftershock decay of a nearby magnitude 2.7 earthquake that occurred about 11 hours earlier. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 21:59:38 UTC | 2.4ml | 121 km SSE of Sand Point, Alaska 54.354°, -159.692° | 25.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 earthquake was recorded 121 km SSE of Sand Point, Alaska on February 23, 2021 at 21:59 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.7 earthquake that occurred about 11 hours earlier. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 21:55:53 UTC | 4.4mb | 68 km W of San Antonio de los Cobres, Argentina -24.268°, -66.987° | 186.6 km | 1 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.4 earthquake 68 km W of San Antonio de los Cobres, Argentina came in on February 23, 2021 at 21:55 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 21:45:16 UTC | 4.4mb | 98 km NE of Barishal, Pakistan 36.971°, 75.451° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 seismic event took place 98 km NE of Barishal, Pakistan on February 23, 2021 at 21:45 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 21:44:58 UTC | 3.4md | 70 km NNW of San Antonio, Puerto Rico 19.109°, -67.266° | 7.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.4 seismic event took place 70 km NNW of San Antonio, Puerto Rico on February 23, 2021 at 21:44 UTC. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 21:37:37 UTC | 4.7mb | southeast of the Loyalty Islands -22.879°, 171.316° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.7 earthquake southeast of the Loyalty Islands came in on February 23, 2021 at 21:37 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 21:34:35 UTC | 2.1ml | 27 km SSE of Mina, Nevada 38.147°, -118.041° | 2.8 km | - | - | - | ✓ Reviewed | USGS → |
At 21:34 UTC on February 23, 2021, a magnitude 2.1 tremor occurred 27 km SSE of Mina, Nevada. 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. | ||||||||
2021-02-23 2021-02-23 20:59:26 UTC | 2.2ml | 11 km SSE of Tatums, Oklahoma 34.389°, -97.402° | 5.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.2 earthquake 11 km SSE of Tatums, Oklahoma with origin time 20:59 UTC on February 23, 2021. This event falls inside the aftershock decay of a nearby magnitude 2.2 earthquake that occurred about 16 hours earlier. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 20:51:21 UTC | 4.9mb | 184 km ESE of Alo, Wallis and Futuna -15.034°, -176.568° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 20:51 UTC on February 23, 2021, a magnitude 4.9 tremor occurred 184 km ESE of Alo, Wallis and Futuna. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 20:44:38 UTC | 4.9mb | 117 km E of Alo, Wallis and Futuna -14.331°, -177.019° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.9 earthquake 117 km E of Alo, Wallis and Futuna at 20:44 UTC on February 23, 2021. The event was offshore. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 20:38:27 UTC | 2.3ml | 15 km NNW of Toyah, Texas 31.439°, -103.879° | 4.8 km | - | - | - | ✓ Reviewed | USGS → |
February 23, 2021 brought a magnitude 2.3 earthquake 15 km NNW of Toyah, Texas, logged at 20:38 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 20:36:03 UTC | 2.8ml | 19 km NNE of Willow, Alaska 61.901°, -149.872° | 38.9 km | 1 | - | - | ✓ Reviewed | USGS → |
February 23, 2021 brought a magnitude 2.8 earthquake 19 km NNE of Willow, Alaska, logged at 20:36 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 20:25:49 UTC | 4.3mb | 68 km E of Luganville, Vanuatu -15.455°, 167.797° | 155.4 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.3 earthquake 68 km E of Luganville, Vanuatu at 20:25 UTC on February 23, 2021. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 20:04:24 UTC | 2.7md | 8 km SW of Guánica, Puerto Rico 17.912°, -66.952° | 13.0 km | - | - | - | ✓ Reviewed | USGS → |
On February 23, 2021, worldwide seismic activity registered a magnitude 2.7 earthquake 8 km SW of Guánica, Puerto Rico at 20:04 UTC. Coming 1 hours after a magnitude 3.0 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. | ||||||||
2021-02-23 2021-02-23 20:03:56 UTC | 3.0ml | 72 km SE of King Cove, Alaska 54.640°, -161.457° | 30.4 km | - | - | - | ✓ Reviewed | USGS → |
At 20:03 UTC on February 23, 2021, a magnitude 3.0 tremor occurred 72 km SE of King Cove, Alaska. The event was offshore. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-02-23 2021-02-23 20:00:24 UTC | 2.0md | 5 km E of P?hala, Hawaii 19.206°, -155.429° | 34.5 km | - | - | - | Auto | USGS → |
February 23, 2021 brought a magnitude 2.0 earthquake 5 km E of P?hala, Hawaii, logged at 20:00 UTC. It arrived roughly 3 hours after a larger magnitude 2.2 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.0 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, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.