Earthquakes on February 21, 2023
258
EARTHQUAKES on February 21, 2023
24-hour UTC period · USGS data
12 km deep · 110 people felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
5
M4.0–4.9
36
M3.0–3.9
9
M2.0–2.9
48
M1.0–1.9
160
Activity Summary
258
Total earthquakes
~250
Daily average
Normal
Activity level
5
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
5.4
43 km SSE of Old Harbor, Alaska
05:35 UTC · 11.7 km deep
Felt by 110
5.2
114 km S of Akureyri, Iceland
08:41 UTC · 10.0 km deep
5.1
Bonin Islands, Japan region
18:05 UTC · 15.7 km deep
5.1
79 km SW of ??jj??b?d, Iran
06:05 UTC · 10.0 km deep
Felt by 2
5.0
287 km WSW of Sinabang, Indonesia
19:22 UTC · 10.0 km deep
4.9
Banda Sea
16:15 UTC · 21.6 km deep
4.9
off the coast of Central America
03:51 UTC · 10.0 km deep
4.9
South Sandwich Islands region
02:54 UTC · 10.0 km deep
Earthquake Map — February 21, 2023
All Earthquakes — February 21, 2023
Showing 30 of 98 (filtered from 258)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-02-21 2023-02-21 23:57:17 UTC | 2.2ml | 35 km E of Port Heiden, Alaska 56.897°, -158.048° | 3.1 km | - | - | - | ✓ Reviewed | USGS → |
At 23:57 UTC on February 21, 2023, a magnitude 2.2 tremor occurred 35 km E of Port Heiden, Alaska. It arrived roughly 12 hours after a larger magnitude 2.3 mainshock in the same 20 km area, placing it within the typical aftershock window. 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. | ||||||||
2023-02-21 2023-02-21 23:38:16 UTC | 2.5ml | 15 km NE of Hermleigh, Texas 32.753°, -100.662° | 6.8 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.5 earthquake 15 km NE of Hermleigh, Texas at 23:38 UTC on February 21, 2023. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 23:28:45 UTC | 2.3md | 5 km SE of Maria Antonia, Puerto Rico 17.950°, -66.848° | 11.8 km | - | - | - | ✓ Reviewed | USGS → |
On February 21, 2023, worldwide seismic activity registered a magnitude 2.3 earthquake 5 km SE of Maria Antonia, Puerto Rico at 23:28 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.4 earthquake that occurred about 23 hours earlier. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 23:24:25 UTC | 2.2md | 6 km SE of Maria Antonia, Puerto Rico 17.940°, -66.845° | 12.6 km | - | - | - | ✓ Reviewed | USGS → |
On February 21, 2023 at 23:24 UTC, a magnitude 2.2 earthquake struck 6 km SE of Maria Antonia, Puerto Rico. It arrived roughly 23 hours after a larger magnitude 2.4 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 23:22:31 UTC | 4.1mb | 55 km NE of Calama, Chile -22.048°, -68.606° | 133.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.1 earthquake was recorded 55 km NE of Calama, Chile on February 21, 2023 at 23:22 UTC. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 23:13:16 UTC | 4.2mb | 53 km SSE of Lospalos, Timor Leste -8.972°, 127.172° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On February 21, 2023, worldwide seismic activity registered a magnitude 4.2 earthquake 53 km SSE of Lospalos, Timor Leste at 23:13 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 22:55:28 UTC | 2.6md | 11 km ESE of P?hala, Hawaii 19.167°, -155.377° | 30.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.6 earthquake 11 km ESE of P?hala, Hawaii with origin time 22:55 UTC on February 21, 2023. Coming 23 hours after a magnitude 2.8 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 22:34:16 UTC | 2.2ml | 64 km ESE of Denali National Park, Alaska 63.267°, -150.581° | 130.5 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.2 earthquake 64 km ESE of Denali National Park, Alaska at 22:34 UTC on February 21, 2023. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 22:20:58 UTC | 4.2mb | 121 km SSE of Santa Gertrudis Miramar, Mexico 15.128°, -94.808° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 22:20 UTC on February 21, 2023, a magnitude 4.2 tremor occurred 121 km SSE of Santa Gertrudis Miramar, Mexico. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 22:12:23 UTC | 2.2ml | Oregon 42.018°, -121.765° | -1.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded near Oregon on February 21, 2023 at 22:12 UTC. 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. | ||||||||
2023-02-21 2023-02-21 21:46:07 UTC | 4.4mb | South Sandwich Islands region -59.992°, -27.820° | 152.9 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.4 event was detected in the South Sandwich Islands region on February 21, 2023, with origin time 21:46 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 21:11:18 UTC | 4.5mb | 2 km ESE of Wairau Valley, New Zealand -41.577°, 173.559° | 59.6 km | 11 | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 earthquake was recorded 2 km ESE of Wairau Valley, New Zealand on February 21, 2023 at 21:11 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 21:06:42 UTC | 2.3md | 2km ENE of Pinnacles, CA 36.538°, -121.119° | 3.7 km | - | - | - | ✓ Reviewed | USGS → |
On February 21, 2023 at 21:06 UTC, a magnitude 2.3 earthquake struck 2km ENE of Pinnacles, CA. 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. | ||||||||
2023-02-21 2023-02-21 20:48:43 UTC | 2.5ml | 56 km NW of Toyah, Texas 31.617°, -104.273° | 7.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.5 event was detected 56 km NW of Toyah, Texas on February 21, 2023, with origin time 20:48 UTC. It arrived roughly 13 hours after a larger magnitude 3.1 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. | ||||||||
2023-02-21 2023-02-21 20:32:30 UTC | 2.1ml | 56 km NW of Toyah, Texas 31.609°, -104.274° | 7.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.1 earthquake 56 km NW of Toyah, Texas with origin time 20:32 UTC on February 21, 2023. Coming 13 hours after a magnitude 3.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 20:10:47 UTC | 3.4md | 107 km N of Cruz Bay, U.S. Virgin Islands 19.296°, -64.686° | 37.2 km | - | - | - | ✓ Reviewed | USGS → |
On February 21, 2023, worldwide seismic activity registered a magnitude 3.4 earthquake 107 km N of Cruz Bay, U.S. Virgin Islands at 20:10 UTC. The event was offshore. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 19:57:47 UTC | 3.9md | 115 km NNE of Cruz Bay, U.S. Virgin Islands 19.322°, -64.438° | 30.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.9 earthquake was recorded 115 km NNE of Cruz Bay, U.S. Virgin Islands on February 21, 2023 at 19:57 UTC. See the M3.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 19:56:20 UTC | 2.3md | 6 km S of P?hala, Hawaii 19.149°, -155.470° | 32.2 km | - | - | - | ✓ Reviewed | USGS → |
February 21, 2023 brought a magnitude 2.3 earthquake 6 km S of P?hala, Hawaii, logged at 19:56 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.8 earthquake that occurred about 20 hours earlier. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 19:43:06 UTC | 3.8ml | 253 km ESE of Attu Station, Alaska 52.227°, 176.786° | 124.5 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.8 earthquake 253 km ESE of Attu Station, Alaska with origin time 19:43 UTC on February 21, 2023. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 19:29:49 UTC | 3.0ml | 43 km NW of Mentasta Lake, Alaska 63.197°, -144.376° | 10.3 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.0 earthquake 43 km NW of Mentasta Lake, Alaska came in on February 21, 2023 at 19:29 UTC. The event was offshore. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 19:26:10 UTC | 2.1md | 12 km ENE of P?hala, Hawaii 19.248°, -155.370° | 32.4 km | - | - | - | ✓ Reviewed | USGS → |
On February 21, 2023, worldwide seismic activity registered a magnitude 2.1 earthquake 12 km ENE of P?hala, Hawaii at 19:26 UTC. It arrived roughly 19 hours after a larger magnitude 2.8 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 19:22:12 UTC | 5.0mb | 287 km WSW of Sinabang, Indonesia 1.825°, 93.879° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 19:22 UTC on February 21, 2023, a magnitude 5.0 tremor occurred 287 km WSW of Sinabang, Indonesia. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 19:21:37 UTC | 2.8ml | 46 km E of Denali National Park, Alaska 63.601°, -150.800° | 11.7 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.8 earthquake 46 km E of Denali National Park, Alaska with origin time 19:21 UTC on February 21, 2023. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 19:12:39 UTC | 2.2ml | 45 km NW of Toyah, Texas 31.619°, -104.115° | 6.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.2 event was detected 45 km NW of Toyah, Texas on February 21, 2023, with origin time 19:12 UTC. Coming 8 hours after a magnitude 2.8 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 19:02:57 UTC | 3.2ml | 14 km ENE of Wright, Wyoming 43.778°, -105.321° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
At 19:02 UTC on February 21, 2023, a magnitude 3.2 tremor occurred 14 km ENE of Wright, Wyoming. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 19:02:37 UTC | 4.1mb | 109 km NW of Ambon, Indonesia -3.104°, 127.394° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.1 earthquake 109 km NW of Ambon, Indonesia with origin time 19:02 UTC on February 21, 2023. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 18:51:00 UTC | 4.7mb | Galapagos Triple Junction region 2.163°, -100.980° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.7 seismic event took place in the Galapagos Triple Junction region on February 21, 2023 at 18:51 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 18:45:49 UTC | 2.2ml | 11 km NNE of Alpine, Texas 30.458°, -103.621° | 8.1 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.2 earthquake 11 km NNE of Alpine, Texas came in on February 21, 2023 at 18:45 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 18:44:55 UTC | 2.8ml | 179 km WSW of Adak, Alaska 51.179°, -178.972° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
On February 21, 2023, worldwide seismic activity registered a magnitude 2.8 earthquake 179 km WSW of Adak, Alaska at 18:44 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-02-21 2023-02-21 18:19:34 UTC | 2.0md | 6 km SSW of Indios, Puerto Rico 17.940°, -66.840° | 11.7 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.0 earthquake 6 km SSW of Indios, Puerto Rico at 18:19 UTC on February 21, 2023. Coming 18 hours after a magnitude 2.4 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. 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 21, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.