Earthquakes on April 23, 2023
292
EARTHQUAKES on April 23, 2023
24-hour UTC period · USGS data
LARGEST: M5.4 — South Sandwich Islands region
77 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
6
M4.0–4.9
32
M3.0–3.9
12
M2.0–2.9
71
M1.0–1.9
171
Activity Summary
292
Total earthquakes
~250
Daily average
Normal
Activity level
6
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.4
South Sandwich Islands region
23:39 UTC · 76.7 km deep
5.3
129 km WNW of Cabra, Philippines
16:23 UTC · 10.0 km deep
Felt by 2
5.3
48 km ESE of Lapi, Philippines
09:19 UTC · 36.5 km deep
Felt by 4
5.1
Kermadec Islands, New Zealand
03:47 UTC · 44.3 km deep
5.1
120 km SSE of Pangai, Tonga
02:28 UTC · 10.0 km deep
5.0
Kermadec Islands, New Zealand
16:24 UTC · 45.8 km deep
4.9
Kermadec Islands, New Zealand
16:51 UTC · 40.7 km deep
4.9
47 km ESE of Lapi, Philippines
09:21 UTC · 10.3 km deep
Earthquake Map — April 23, 2023
All Earthquakes — April 23, 2023
Showing 30 of 121 (filtered from 292)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-04-23 2023-04-23 23:39:29 UTC | 5.4mww | South Sandwich Islands region -59.566°, -26.445° | 76.7 km | - | III | green | ✓ Reviewed | USGS → |
On April 23, 2023 at 23:39 UTC, a magnitude 5.4 earthquake struck in the South Sandwich Islands region. 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 April 23, 2023. See the M5.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 23:37:11 UTC | 3.8md | 48 km S of Boca de Yuma, Dominican Republic 17.941°, -68.681° | 50.0 km | - | - | - | ✓ Reviewed | USGS → |
April 23, 2023 brought a magnitude 3.8 earthquake 48 km S of Boca de Yuma, Dominican Republic, logged at 23:37 UTC. The event was offshore. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 23:22:25 UTC | 2.8ml | 247 km ESE of Chiniak, Alaska 56.613°, -148.633° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.8 event was detected 247 km ESE of Chiniak, Alaska on April 23, 2023, with origin time 23:22 UTC. Coming 10 hours after a magnitude 2.9 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 23:06:46 UTC | 3.9mb | Volcano Islands, Japan region 22.629°, 141.688° | 215.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.9 seismic event took place in the Volcano Islands, Japan region on April 23, 2023 at 23:06 UTC. See the M3.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 22:52:09 UTC | 2.1md | 6 km ENE of P?hala, Hawaii 19.234°, -155.424° | 31.4 km | - | - | - | Auto | USGS → |
The USGS recorded this magnitude 2.1 earthquake 6 km ENE of P?hala, Hawaii at 22:52 UTC on April 23, 2023. Coming 20 hours after a magnitude 2.8 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 22:32:34 UTC | 4.3mb | off the coast of Central America 12.678°, -89.875° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.3 earthquake near off the coast of Central America with origin time 22:32 UTC on April 23, 2023. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 22:31:37 UTC | 4.2mb | 27 km NE of Copiapó, Chile -27.167°, -70.174° | 97.1 km | - | - | - | ✓ Reviewed | USGS → |
April 23, 2023 brought a magnitude 4.2 earthquake 27 km NE of Copiapó, Chile, logged at 22:31 UTC. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 22:08:05 UTC | 2.7ml | 79 km WSW of Adak, Alaska 51.524°, -177.629° | 68.1 km | - | - | - | ✓ Reviewed | USGS → |
On April 23, 2023 at 22:08 UTC, a magnitude 2.7 earthquake struck 79 km WSW of Adak, Alaska. It arrived roughly 20 hours after a larger magnitude 3.3 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 22:05:33 UTC | 2.3ml | 13 km SSE of Skwentna, Alaska 61.881°, -151.269° | 77.4 km | - | - | - | ✓ Reviewed | USGS → |
On April 23, 2023 at 22:05 UTC, a magnitude 2.3 earthquake struck 13 km SSE of Skwentna, Alaska. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 21:54:03 UTC | 4.5mb | south of the Fiji Islands -23.978°, -179.988° | 510.5 km | - | - | - | ✓ Reviewed | USGS → |
On April 23, 2023, worldwide seismic activity registered a magnitude 4.5 earthquake south of the Fiji Islands at 21:54 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 21:52:21 UTC | 2.1ml | 26 km NNW of P?hala, Hawaii 19.426°, -155.573° | 41.6 km | - | - | - | ✓ Reviewed | USGS → |
At 21:52 UTC on April 23, 2023, a magnitude 2.1 tremor occurred 26 km NNW of P?hala, Hawaii. Coming 7 hours after a magnitude 2.2 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 21:47:52 UTC | 2.1md | 9 km E of P?hala, Hawaii 19.207°, -155.384° | 3.3 km | - | - | - | Auto | USGS → |
Reports of a magnitude 2.1 earthquake 9 km E of P?hala, Hawaii came in on April 23, 2023 at 21:47 UTC. Coming 18 hours after a magnitude 2.8 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. 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. | ||||||||
2023-04-23 2023-04-23 21:47:46 UTC | 2.3ml | 10 km ENE of P?hala, Hawaii 19.229°, -155.386° | 30.9 km | - | - | - | Auto | USGS → |
A magnitude 2.3 seismic event took place 10 km ENE of P?hala, Hawaii on April 23, 2023 at 21:47 UTC. It arrived roughly 18 hours after a larger magnitude 2.8 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 21:33:16 UTC | 2.0md | 6km SW of Antioch, CA 37.968°, -121.852° | 20.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 6km SW of Antioch, CA with origin time 21:33 UTC on April 23, 2023. This event falls inside the aftershock decay of a nearby magnitude 2.8 earthquake that occurred about 1 hours earlier. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 21:33:13 UTC | 4.4mb | Bonin Islands, Japan region 26.376°, 141.864° | 42.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 seismic event took place in the Bonin Islands, Japan region on April 23, 2023 at 21:33 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 21:30:02 UTC | 4.4mb | 233 km NW of Tobelo, Indonesia 3.448°, 126.788° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
April 23, 2023 brought a magnitude 4.4 earthquake 233 km NW of Tobelo, Indonesia, logged at 21:30 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.6 earthquake that occurred about 1 hours earlier. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 21:28:31 UTC | 4.6mb | 235 km NW of Tobelo, Indonesia 3.397°, 126.695° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
On April 23, 2023 at 21:28 UTC, a magnitude 4.6 earthquake struck 235 km NW of Tobelo, Indonesia. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 21:15:50 UTC | 2.0ml | 5 km NNW of Plumas Eureka (historical), California 39.807°, -120.725° | 14.4 km | - | - | - | ✓ Reviewed | USGS → |
On April 23, 2023, worldwide seismic activity registered a magnitude 2.0 earthquake 5 km NNW of Plumas Eureka (historical), California at 21:15 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 21:15:24 UTC | 2.8ml | 44 km E of Pedro Bay, Alaska 59.726°, -153.320° | 108.1 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.8 earthquake 44 km E of Pedro Bay, Alaska came in on April 23, 2023 at 21:15 UTC. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 21:12:22 UTC | 2.1ml | 13 km S of Princeton, Canada 49.334°, -120.476° | -0.4 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.1 earthquake 13 km S of Princeton, Canada with origin time 21:12 UTC on April 23, 2023. 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. | ||||||||
2023-04-23 2023-04-23 20:59:07 UTC | 2.5md | 6km SW of Antioch, CA 37.960°, -121.854° | 19.2 km | 3 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.5 earthquake 6km SW of Antioch, CA came in on April 23, 2023 at 20:59 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.8 earthquake that occurred about 1 hours earlier. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 20:24:42 UTC | 2.4ml | Island of Hawaii, Hawaii 19.424°, -155.240° | 1.3 km | 1 | - | - | ✓ Reviewed | USGS → |
At 20:24 UTC on April 23, 2023, a magnitude 2.4 tremor occurred near Island of Hawaii, Hawaii. Coming 20 hours after a magnitude 4.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 20:20:18 UTC | 2.8ml | 6km SW of Antioch, CA 37.958°, -121.846° | 20.6 km | 39 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.8 earthquake 6km SW of Antioch, CA at 20:20 UTC on April 23, 2023. In the 72 hours after this event, the USGS recorded 3 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 20:05:04 UTC | 3.2ml | 77 km SW of Adak, Alaska 51.422°, -177.489° | 54.4 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.2 earthquake 77 km SW of Adak, Alaska came in on April 23, 2023 at 20:05 UTC. Coming 18 hours after a magnitude 3.3 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 20:01:28 UTC | 2.2md | 6km SSW of Antioch, CA 37.954°, -121.838° | 20.4 km | - | - | - | ✓ Reviewed | USGS → |
At 20:01 UTC on April 23, 2023, a magnitude 2.2 tremor occurred 6km SSW of Antioch, CA. It arrived roughly 1 hours after a larger magnitude 2.4 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 19:48:53 UTC | 2.4md | 6km SSW of Antioch, CA 37.953°, -121.840° | 19.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 earthquake was recorded 6km SSW of Antioch, CA on April 23, 2023 at 19:48 UTC. In the 72 hours after this event, the USGS recorded 3 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 19:30:17 UTC | 2.3md | 6km SSW of Antioch, CA 37.953°, -121.841° | 20.8 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.3 event was detected 6km SSW of Antioch, CA on April 23, 2023, with origin time 19:30 UTC. In the 72 hours after this event, the USGS recorded 3 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 19:25:57 UTC | 2.1ml | 10 km ENE of P?hala, Hawaii 19.240°, -155.384° | 32.5 km | - | - | - | Auto | USGS → |
This magnitude 2.1 event was detected 10 km ENE of P?hala, Hawaii on April 23, 2023, with origin time 19:25 UTC. It arrived roughly 16 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. | ||||||||
2023-04-23 2023-04-23 18:27:28 UTC | 2.3md | 5km WSW of Colma, CA 37.664°, -122.512° | 5.3 km | 82 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.3 earthquake 5km WSW of Colma, CA came in on April 23, 2023 at 18:27 UTC. In the 72 hours after this event, the USGS recorded 3 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-23 2023-04-23 18:10:42 UTC | 4.4mb | 37 km ESE of Chubek, Tajikistan 37.464°, 70.089° | 9.8 km | - | - | - | ✓ Reviewed | USGS → |
On April 23, 2023 at 18:10 UTC, a magnitude 4.4 earthquake struck 37 km ESE of Chubek, Tajikistan. See the M4.4 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 April 23, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.