Earthquakes on April 9, 2023
310
EARTHQUAKES on April 9, 2023
24-hour UTC period · USGS data
10 km deep
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
8
M4.0–4.9
45
M3.0–3.9
12
M2.0–2.9
79
M1.0–1.9
166
Activity Summary
310
Total earthquakes
~250
Daily average
Elevated
Activity level
8
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.8
213 km WSW of Kavieng, Papua New Guinea
23:41 UTC · 10.0 km deep
5.7
southern Mid-Atlantic Ridge
22:11 UTC · 10.0 km deep
5.7
Nicobar Islands, India region
12:17 UTC · 10.0 km deep
5.5
Nicobar Islands, India region
10:31 UTC · 10.0 km deep
5.3
State of Yap, Federated States of Micronesia
15:30 UTC · 10.0 km deep
5.3
Nicobar Islands, India region
07:46 UTC · 10.0 km deep
5.2
Nicobar Islands, India region
20:55 UTC · 10.0 km deep
5.1
central Mid-Atlantic Ridge
01:21 UTC · 10.0 km deep
Earthquake Map — April 9, 2023
All Earthquakes — April 9, 2023
Showing 30 of 144 (filtered from 310)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-04-09 2023-04-09 23:58:25 UTC | 2.5md | 6 km WSW of Guánica, Puerto Rico 17.939°, -66.963° | 15.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 seismic event took place 6 km WSW of Guánica, Puerto Rico on April 9, 2023 at 23:58 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.5 earthquake that occurred about 11 hours earlier. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 23:55:02 UTC | 4.1mb | Nicobar Islands, India region 8.992°, 93.848° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:55 UTC on April 9, 2023, a magnitude 4.1 tremor occurred in the Nicobar Islands, India region. Coming 12 hours after a magnitude 5.7 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 23:43:59 UTC | 4.3mb | 237 km WSW of Kavieng, Papua New Guinea -3.499°, 148.871° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On April 9, 2023 at 23:43 UTC, a magnitude 4.3 earthquake struck 237 km WSW of Kavieng, Papua New Guinea. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 23:41:03 UTC | 5.8mww | 213 km WSW of Kavieng, Papua New Guinea -3.447°, 149.085° | 10.0 km | - | III | green | ✓ Reviewed | USGS → |
On April 9, 2023 at 23:41 UTC, a magnitude 5.8 earthquake struck 213 km WSW of Kavieng, Papua New Guinea. 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 9, 2023. See the M5.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 23:34:40 UTC | 2.1md | Puerto Rico region 17.923°, -66.953° | 15.4 km | - | - | - | ✓ Reviewed | USGS → |
On April 9, 2023, worldwide seismic activity registered a magnitude 2.1 earthquake in the Puerto Rico region at 23:34 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.5 earthquake that occurred about 10 hours earlier. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 23:33:06 UTC | 4.5mb | 12 km S of Basotu, Tanzania -4.478°, 35.087° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:33 UTC on April 9, 2023, a magnitude 4.5 tremor occurred 12 km S of Basotu, Tanzania. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 23:23:14 UTC | 2.6md | 24km NW of Parkfield, CA 36.052°, -120.621° | 5.3 km | 1 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.6 event was detected 24km NW of Parkfield, CA on April 9, 2023, with origin time 23:23 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 23:16:31 UTC | 2.2ml | 22 km NW of Silver Peak, Nevada 37.894°, -117.818° | 9.5 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.2 earthquake 22 km NW of Silver Peak, Nevada came in on April 9, 2023 at 23:16 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 23:02:28 UTC | 2.5ml | 7 km SSW of Soldotna, Alaska 60.422°, -151.117° | 43.6 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.5 earthquake 7 km SSW of Soldotna, Alaska with origin time 23:02 UTC on April 9, 2023. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 23:00:01 UTC | 2.3md | Puerto Rico region 17.931°, -66.967° | 15.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 earthquake was recorded in the Puerto Rico region on April 9, 2023 at 23:00 UTC. It arrived roughly 10 hours after a larger magnitude 4.5 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. | ||||||||
2023-04-09 2023-04-09 22:50:15 UTC | 3.2ml | 19 km SE of Wright, Wyoming 43.613°, -105.339° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
April 9, 2023 brought a magnitude 3.2 earthquake 19 km SE of Wright, Wyoming, logged at 22:50 UTC. 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. | ||||||||
2023-04-09 2023-04-09 22:46:34 UTC | 2.6md | Puerto Rico region 17.916°, -66.835° | 11.8 km | - | - | - | ✓ Reviewed | USGS → |
At 22:46 UTC on April 9, 2023, a magnitude 2.6 tremor occurred in the Puerto Rico region. It arrived roughly 10 hours after a larger magnitude 4.5 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 22:39:52 UTC | 4.2mb | south of the Fiji Islands -25.718°, -177.032° | 103.2 km | - | - | - | ✓ Reviewed | USGS → |
April 9, 2023 brought a magnitude 4.2 earthquake south of the Fiji Islands, logged at 22:39 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 22:18:32 UTC | 4.2mb | 123 km WNW of Hihifo, Tonga -15.679°, -174.915° | 268.6 km | - | - | - | ✓ Reviewed | USGS → |
On April 9, 2023 at 22:18 UTC, a magnitude 4.2 earthquake struck 123 km WNW of Hihifo, Tonga. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 22:11:20 UTC | 5.7mww | southern Mid-Atlantic Ridge -48.298°, -9.920° | 10.0 km | - | - | green | ✓ Reviewed | USGS → |
A magnitude 5.7 earthquake was recorded near southern Mid-Atlantic Ridge on April 9, 2023 at 22:11 UTC. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M5.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 22:09:45 UTC | 2.8ml | 296 km WSW of Adak, Alaska 51.196°, 179.226° | 38.5 km | - | - | - | ✓ Reviewed | USGS → |
At 22:09 UTC on April 9, 2023, a magnitude 2.8 tremor occurred 296 km WSW of Adak, Alaska. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 22:08:03 UTC | 2.1md | 13 km ESE of P?hala, Hawaii 19.154°, -155.362° | 30.8 km | - | - | - | Auto | USGS → |
A magnitude 2.1 earthquake was recorded 13 km ESE of P?hala, Hawaii on April 9, 2023 at 22:08 UTC. Coming 2 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. | ||||||||
2023-04-09 2023-04-09 21:58:09 UTC | 2.7md | 4 km WSW of Guánica, Puerto Rico 17.954°, -66.947° | 12.7 km | - | - | - | ✓ Reviewed | USGS → |
April 9, 2023 brought a magnitude 2.7 earthquake 4 km WSW of Guánica, Puerto Rico, logged at 21:58 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.5 earthquake that occurred about 9 hours earlier. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 21:16:34 UTC | 2.9ml | 64 km ESE of Port Heiden, Alaska 56.713°, -157.665° | 79.4 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.9 earthquake 64 km ESE of Port Heiden, Alaska came in on April 9, 2023 at 21:16 UTC. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 21:12:48 UTC | 4.5mb | 175 km ESE of Mar del Plata, Argentina -38.472°, -55.640° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.5 earthquake 175 km ESE of Mar del Plata, Argentina at 21:12 UTC on April 9, 2023. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 21:10:04 UTC | 2.1ml | 14 km S of Princeton, Canada 49.326°, -120.494° | -0.4 km | - | - | - | ✓ Reviewed | USGS → |
At 21:10 UTC on April 9, 2023, a magnitude 2.1 tremor occurred 14 km S of Princeton, Canada. 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. | ||||||||
2023-04-09 2023-04-09 21:07:10 UTC | 4.2mb | Nicobar Islands, India region 8.582°, 93.943° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.2 earthquake was recorded in the Nicobar Islands, India region on April 9, 2023 at 21:07 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 21:00:08 UTC | 4.1mb | 279 km SSE of Port Blair, India 9.372°, 93.810° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.1 earthquake 279 km SSE of Port Blair, India at 21:00 UTC on April 9, 2023. It arrived roughly 12 hours after a larger magnitude 4.3 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 21:00:00 UTC | 4.1mb | 45 km NE of Port-Olry, Vanuatu -14.806°, 167.415° | 101.5 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.1 event was detected 45 km NE of Port-Olry, Vanuatu on April 9, 2023, with origin time 21:00 UTC. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 20:55:58 UTC | 5.2mww | Nicobar Islands, India region 9.012°, 93.922° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 5.2 event was detected in the Nicobar Islands, India region on April 9, 2023, with origin time 20:55 UTC. It arrived roughly 9 hours after a larger magnitude 5.7 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M5.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 20:40:28 UTC | 2.1ml | 29 km SSE of Karluk, Alaska 57.316°, -154.300° | 29.8 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.1 earthquake 29 km SSE of Karluk, Alaska came in on April 9, 2023 at 20:40 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 20:29:40 UTC | 2.2ml | 55 km S of Whites City, New Mexico 31.673°, -104.393° | 9.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 55 km S of Whites City, New Mexico on April 9, 2023 at 20:29 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.7 earthquake that occurred about 19 hours earlier. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 20:25:24 UTC | 2.2ml | 11 km ENE of P?hala, Hawaii 19.236°, -155.376° | 30.0 km | - | - | - | Auto | USGS → |
On April 9, 2023 at 20:25 UTC, a magnitude 2.2 earthquake struck 11 km ENE of P?hala, Hawaii. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-04-09 2023-04-09 20:25:15 UTC | 2.0ml | 56 km S of Whites City, New Mexico 31.670°, -104.389° | 6.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 56 km S of Whites City, New Mexico on April 9, 2023 at 20:25 UTC. It arrived roughly 19 hours after a larger magnitude 2.7 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. | ||||||||
2023-04-09 2023-04-09 20:23:26 UTC | 2.1ml | 55 km S of Whites City, New Mexico 31.679°, -104.397° | 6.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 55 km S of Whites City, New Mexico on April 9, 2023 at 20:23 UTC. Coming 19 hours after a magnitude 2.7 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. | ||||||||
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 9, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.