Earthquakes on April 4, 2023
331
EARTHQUAKES on April 4, 2023
24-hour UTC period · USGS data
LARGEST: M6.3 — 73 km S of Boca Chica, Panama
16 km deep · 235 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
7
M4.0–4.9
49
M3.0–3.9
14
M2.0–2.9
49
M1.0–1.9
212
Activity Summary
331
Total earthquakes
~250
Daily average
Elevated
Activity level
7
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
6.3
73 km S of Boca Chica, Panama
22:18 UTC · 16.0 km deep
Felt by 235
6.2
124 km E of Gigmoto, Philippines
12:54 UTC · 10.0 km deep
Felt by 10
5.9
62 km W of Copiapó, Chile
19:08 UTC · 53.0 km deep
Felt by 9
5.4
10 km E of San Gabriel Mixtepec, Mexico
02:11 UTC · 31.0 km deep
Felt by 79
5.0
Nicobar Islands, India region
17:17 UTC · 10.0 km deep
5.0
7 km ESE of Chebika, Tunisia
16:27 UTC · 10.0 km deep
Felt by 5
5.0
Bonin Islands, Japan region
07:07 UTC · 54.5 km deep
4.8
86 km ENE of Alianza Cristiana, Peru
13:35 UTC · 133.1 km deep
Earthquake Map — April 4, 2023
All Earthquakes — April 4, 2023
Showing 30 of 119 (filtered from 331)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-04-04 2023-04-04 23:51:36 UTC | 3.0ml | Rat Islands, Aleutian Islands, Alaska 50.182°, 177.518° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.0 seismic event took place near Rat Islands, Aleutian Islands, Alaska on April 4, 2023 at 23:51 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 23:11:43 UTC | 2.5ml | 78 km SSE of Atka, Alaska 51.587°, -173.611° | 17.0 km | - | - | - | ✓ Reviewed | USGS → |
On April 4, 2023, worldwide seismic activity registered a magnitude 2.5 earthquake 78 km SSE of Atka, Alaska at 23:11 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 23:00:36 UTC | 2.0ml | 99 km W of Adak, Alaska 51.856°, -178.085° | 4.8 km | - | - | - | ✓ Reviewed | USGS → |
On April 4, 2023 at 23:00 UTC, a magnitude 2.0 earthquake struck 99 km W of Adak, Alaska. Coming 13 hours after a magnitude 3.0 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 M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 22:49:47 UTC | 4.4mb | Kermadec Islands region -28.662°, -177.819° | 10.1 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.4 earthquake in the Kermadec Islands region at 22:49 UTC on April 4, 2023. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 22:29:19 UTC | 2.7ml | 31 km WSW of Susitna, Alaska 61.447°, -151.078° | 66.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.7 seismic event took place 31 km WSW of Susitna, Alaska on April 4, 2023 at 22:29 UTC. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 22:23:17 UTC | 4.4mw | 1km NNW of Tres Pinos, CA 36.801°, -121.323° | 10.2 km | 12,209 | IV | green | ✓ Reviewed | USGS → |
At 22:23 UTC on April 4, 2023, a magnitude 4.4 tremor occurred 1km NNW of Tres Pinos, CA. A tsunami evaluation was automatically initiated given the magnitude and location. 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 M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 22:18:12 UTC | 6.3mww | 73 km S of Boca Chica, Panama 7.567°, -82.335° | 16.0 km | 235 | V | green | ✓ Reviewed | USGS → |
On April 4, 2023 at 22:18 UTC, a magnitude 6.3 earthquake struck 73 km S of Boca Chica, Panama. A tsunami evaluation was automatically initiated given the magnitude and location. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M6.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 22:02:59 UTC | 4.6mb | Kermadec Islands region -28.617°, -177.448° | 10.2 km | - | - | - | ✓ Reviewed | USGS → |
On April 4, 2023, worldwide seismic activity registered a magnitude 4.6 earthquake in the Kermadec Islands region at 22:02 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 22:02:17 UTC | 2.0md | 11 km NE of P?hala, Hawaii 19.260°, -155.390° | 33.3 km | - | - | - | Auto | USGS → |
April 4, 2023 brought a magnitude 2.0 earthquake 11 km NE of P?hala, Hawaii, logged at 22:02 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.9 earthquake that occurred about 5 hours earlier. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 21:41:47 UTC | 4.6mb | 279 km ESE of Tadine, New Caledonia -22.370°, 170.434° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 21:41 UTC on April 4, 2023, a magnitude 4.6 tremor occurred 279 km ESE of Tadine, New Caledonia. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 21:41:46 UTC | 4.3mb | 275 km E of Levuka, Fiji -17.919°, -178.086° | 525.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 earthquake was recorded 275 km E of Levuka, Fiji on April 4, 2023 at 21:41 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 21:34:19 UTC | 4.2mb | Pagan region, Northern Mariana Islands 18.266°, 145.636° | 138.3 km | - | - | - | ✓ Reviewed | USGS → |
On April 4, 2023, worldwide seismic activity registered a magnitude 4.2 earthquake in the Pagan region, Northern Mariana Islands at 21:34 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 21:33:35 UTC | 2.0ml | 35 km ESE of Port Heiden, Alaska 56.844°, -158.076° | 2.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 35 km ESE of Port Heiden, Alaska on April 4, 2023 at 21:33 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 21:28:33 UTC | 2.8ml | 34 km E of Petersburg, Alaska 56.871°, -132.400° | 6.6 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.8 earthquake 34 km E of Petersburg, Alaska at 21:28 UTC on April 4, 2023. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 21:24:17 UTC | 4.2mb | 6 km NE of Toyota, Japan 35.118°, 137.209° | 42.1 km | - | - | - | ✓ Reviewed | USGS → |
At 21:24 UTC on April 4, 2023, a magnitude 4.2 tremor occurred 6 km NE of Toyota, Japan. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 21:17:09 UTC | 2.0ml | 4 km SW of Princeton, Canada 49.433°, -120.563° | -0.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 4 km SW of Princeton, Canada on April 4, 2023 at 21:17 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 21:09:54 UTC | 4.5mb | Kermadec Islands region -28.648°, -177.502° | 10.1 km | - | - | - | ✓ Reviewed | USGS → |
April 4, 2023 brought a magnitude 4.5 earthquake in the Kermadec Islands region, logged at 21:09 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 21:06:08 UTC | 4.5mb | 13 km SW of Bni Bouayach, Morocco 35.030°, -3.955° | 15.0 km | - | - | - | ✓ Reviewed | USGS → |
On April 4, 2023 at 21:06 UTC, a magnitude 4.5 earthquake struck 13 km SW of Bni Bouayach, Morocco. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 20:53:40 UTC | 4.3mb | 12 km NNW of Josefina, Philippines 8.308°, 123.501° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.3 earthquake 12 km NNW of Josefina, Philippines with origin time 20:53 UTC on April 4, 2023. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 20:42:25 UTC | 2.3md | 2km E of Aromas, CA 36.892°, -121.616° | -0.1 km | 46 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.3 earthquake 2km E of Aromas, CA with origin time 20:42 UTC on April 4, 2023. 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. | ||||||||
2023-04-04 2023-04-04 20:12:01 UTC | 4.3mb | Maug Islands region, Northern Mariana Islands 20.093°, 145.880° | 69.5 km | - | - | - | ✓ Reviewed | USGS → |
On April 4, 2023, worldwide seismic activity registered a magnitude 4.3 earthquake in the Maug Islands region, Northern Mariana Islands at 20:12 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 20:10:13 UTC | 3.2ml | 247 km SE of Chiniak, Alaska 56.122°, -149.269° | 15.4 km | - | - | - | ✓ Reviewed | USGS → |
At 20:10 UTC on April 4, 2023, a magnitude 3.2 tremor occurred 247 km SE of Chiniak, Alaska. The event was offshore. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 20:08:39 UTC | 3.8mb | 56 km SSE of Mohr, Iran 27.105°, 53.154° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.8 earthquake 56 km SSE of Mohr, Iran came in on April 4, 2023 at 20:08 UTC. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 19:32:23 UTC | 2.2ml | 156 km S of Cordova, Alaska 59.136°, -145.696° | 2.5 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.2 earthquake 156 km S of Cordova, Alaska came in on April 4, 2023 at 19:32 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. | ||||||||
2023-04-04 2023-04-04 19:26:59 UTC | 4.6mb | Near the coast of Atacama, Chile -27.361°, -71.049° | 52.6 km | 1 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.6 earthquake near Near the coast of Atacama, Chile at 19:26 UTC on April 4, 2023. It arrived roughly 1 hours after a larger magnitude 5.9 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 19:08:46 UTC | 5.9mww | 62 km W of Copiapó, Chile -27.433°, -70.962° | 53.0 km | 9 | V | green | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 5.9 earthquake 62 km W of Copiapó, Chile with origin time 19:08 UTC on April 4, 2023. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. The event was offshore. See the M5.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 18:04:58 UTC | 2.2ml | 25 km NW of Eureka Roadhouse, Alaska 62.123°, -147.441° | 26.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 25 km NW of Eureka Roadhouse, Alaska on April 4, 2023 at 18:04 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 17:48:33 UTC | 4.5mb | 109 km E of Gigmoto, Philippines 13.779°, 125.398° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 earthquake was recorded 109 km E of Gigmoto, Philippines on April 4, 2023 at 17:48 UTC. It arrived roughly 5 hours after a larger magnitude 6.2 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 17:43:51 UTC | 4.6mb | southern Mid-Atlantic Ridge -22.677°, -12.752° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.6 event was detected near southern Mid-Atlantic Ridge on April 4, 2023, with origin time 17:43 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-04 2023-04-04 17:22:50 UTC | 4.3mb | 193 km E of Kuril’sk, Russia 45.526°, 150.312° | 35.7 km | - | - | - | ✓ Reviewed | USGS → |
At 17:22 UTC on April 4, 2023, a magnitude 4.3 tremor occurred 193 km E of Kuril’sk, Russia. The event was offshore. See the M4.3 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 April 4, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.