Earthquakes on August 23, 2025
243
EARTHQUAKES on August 23, 2025
24-hour UTC period · USGS data
17 km deep · 42 people felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
10
M4.0–4.9
45
M3.0–3.9
12
M2.0–2.9
60
M1.0–1.9
116
Activity Summary
243
Total earthquakes
~250
Daily average
Normal
Activity level
10
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
6.0
88 km SW of Acajutla, El Salvador
09:14 UTC · 17.0 km deep
Felt by 42
5.8
57 km SSE of Sinabang, Indonesia
12:24 UTC · 18.0 km deep
Felt by 1
5.5
south of Tonga
00:10 UTC · 10.0 km deep
5.4
85 km E of Severo-Kuril’sk, Russia
03:44 UTC · 45.0 km deep
5.3
147 km SE of Petropavlovsk-Kamchatsky, Russia
21:29 UTC · 35.0 km deep
5.2
South Sandwich Islands region
12:58 UTC · 76.2 km deep
5.2
182 km SE of Vilyuchinsk, Russia
04:22 UTC · 10.0 km deep
05.1
221 km SE of Hihifo, Tonga
15:49 UTC · 10.0 km deep
Earthquake Map — August 23, 2025
All Earthquakes — August 23, 2025
Showing 30 of 127 (filtered from 243)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2025-08-23 2025-08-23 23:57:22 UTC | 2.3md | 6 km ESE of La Parguera, Puerto Rico 17.956°, -66.986° | 6.4 km | - | - | - | ✓ Reviewed | USGS → |
At 23:57 UTC on August 23, 2025, a magnitude 2.3 tremor occurred 6 km ESE of La Parguera, Puerto Rico. This event falls inside the aftershock decay of a nearby magnitude 2.5 earthquake that occurred about 15 hours earlier. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 23:56:58 UTC | 2.1ml | 49 km SE of King Cove, Alaska 54.759°, -161.759° | 79.4 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 49 km SE of King Cove, Alaska on August 23, 2025, with origin time 23:56 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 23:51:56 UTC | 4.3mb | 162 km SE of Petropavlovsk-Kamchatsky, Russia 52.218°, 160.587° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 earthquake was recorded 162 km SE of Petropavlovsk-Kamchatsky, Russia on August 23, 2025 at 23:51 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.3 earthquake that occurred about 2 hours earlier. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 23:49:53 UTC | 2.9ml | 55 km E of Savoonga, Alaska 63.791°, -169.378° | 4.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 seismic event took place 55 km E of Savoonga, Alaska on August 23, 2025 at 23:49 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 23:39:00 UTC | 4.5mb | southeast of the Loyalty Islands -22.636°, 173.399° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
August 23, 2025 brought a magnitude 4.5 earthquake southeast of the Loyalty Islands, logged at 23:39 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 23:37:27 UTC | 4.5mb | Pagan region, Northern Mariana Islands 18.968°, 145.443° | 248.1 km | - | - | - | ✓ Reviewed | USGS → |
On August 23, 2025 at 23:37 UTC, a magnitude 4.5 earthquake struck in the Pagan region, Northern Mariana Islands. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 23:22:05 UTC | 2.2ml | 234 km SE of Akutan, Alaska 52.563°, -163.421° | 9.0 km | - | - | - | ✓ Reviewed | USGS → |
August 23, 2025 brought a magnitude 2.2 earthquake 234 km SE of Akutan, Alaska, logged at 23:22 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 22:52:42 UTC | 2.7ml | 87 km SSE of Sand Point, Alaska 54.574°, -160.196° | 21.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.7 earthquake 87 km SSE of Sand Point, Alaska came in on August 23, 2025 at 22:52 UTC. Coming 10 hours after a magnitude 3.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 22:27:03 UTC | 2.2md | 22 km W of Petrolia, CA 40.302°, -124.541° | 8.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 22 km W of Petrolia, CA on August 23, 2025 at 22:27 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 22:13:48 UTC | 4.0ml | 13 km ESE of Segamat, Malaysia 2.478°, 102.936° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.0 earthquake 13 km ESE of Segamat, Malaysia with origin time 22:13 UTC on August 23, 2025. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 21:43:41 UTC | 4.4mb | 204 km SSE of Vilyuchinsk, Russia 51.269°, 159.680° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.4 event was detected 204 km SSE of Vilyuchinsk, Russia on August 23, 2025, with origin time 21:43 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 21:29:35 UTC | 5.3mww | 147 km SE of Petropavlovsk-Kamchatsky, Russia 52.215°, 160.304° | 35.0 km | - | III | green | ✓ Reviewed | USGS → |
At 21:29 UTC on August 23, 2025, a magnitude 5.3 tremor occurred 147 km SE of Petropavlovsk-Kamchatsky, Russia. 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 M5.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 21:26:10 UTC | 2.5ml | 60 km SSW of Nelson Lagoon, Alaska 55.542°, -161.714° | 148.3 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.5 earthquake 60 km SSW of Nelson Lagoon, Alaska came in on August 23, 2025 at 21:26 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 21:18:20 UTC | 2.3ml | 54 km NNW of Petersville, Alaska 62.925°, -151.262° | 104.9 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.3 earthquake 54 km NNW of Petersville, Alaska at 21:18 UTC on August 23, 2025. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 20:38:44 UTC | 4.5mb | 271 km WNW of Houma, Tonga -20.238°, -177.708° | 505.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 earthquake was recorded 271 km WNW of Houma, Tonga on August 23, 2025 at 20:38 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. | ||||||||
2025-08-23 2025-08-23 19:59:54 UTC | 4.2mb | south of Tonga -24.109°, -175.785° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 23, 2025 at 19:59 UTC, a magnitude 4.2 earthquake struck south of Tonga. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 19:58:54 UTC | 4.7mb | 184 km SE of Vilyuchinsk, Russia 51.651°, 160.122° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.7 earthquake 184 km SE of Vilyuchinsk, Russia with origin time 19:58 UTC on August 23, 2025. It arrived roughly 16 hours after a larger magnitude 5.2 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 19:53:22 UTC | 4.6mb | 71 km NNE of Xinyuan, China 44.055°, 83.423° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 19:53 UTC on August 23, 2025, a magnitude 4.6 tremor occurred 71 km NNE of Xinyuan, China. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 19:45:28 UTC | 3.6md | 50 km NNE of Punta Cana, Dominican Republic 18.983°, -68.167° | 70.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.6 event was detected 50 km NNE of Punta Cana, Dominican Republic on August 23, 2025, with origin time 19:45 UTC. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 19:44:25 UTC | 2.3md | 1 km N of Sunol, CA 37.614°, -121.893° | 14.8 km | 1 | - | - | Auto | USGS → |
Reports of a magnitude 2.3 earthquake 1 km N of Sunol, CA came in on August 23, 2025 at 19:44 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 19:44:22 UTC | 2.9ml | 60 km SE of Chignik, Alaska 55.983°, -157.606° | 38.4 km | - | - | - | ✓ Reviewed | USGS → |
August 23, 2025 brought a magnitude 2.9 earthquake 60 km SE of Chignik, Alaska, logged at 19:44 UTC. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 19:37:48 UTC | 3.6md | 105 km NNE of Cruz Bay, U.S. Virgin Islands 19.238°, -64.500° | 23.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.6 earthquake 105 km NNE of Cruz Bay, U.S. Virgin Islands came in on August 23, 2025 at 19:37 UTC. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 19:35:58 UTC | 4.3mb | 172 km E of Korsakov, Russia 46.712°, 145.026° | 369.8 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.3 earthquake 172 km E of Korsakov, Russia with origin time 19:35 UTC on August 23, 2025. 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. | ||||||||
2025-08-23 2025-08-23 19:30:54 UTC | 4.4mb | 216 km SE of Vilyuchinsk, Russia 51.553°, 160.641° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.4 earthquake 216 km SE of Vilyuchinsk, Russia came in on August 23, 2025 at 19:30 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 19:19:27 UTC | 2.0md | 3 km NNW of Coronaca, South Carolina 34.289°, -82.112° | 8.0 km | 11 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 3 km NNW of Coronaca, South Carolina on August 23, 2025, with origin time 19:19 UTC. Coming 15 hours after a magnitude 3.0 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. | ||||||||
2025-08-23 2025-08-23 19:08:23 UTC | 4.5mb | 253 km WSW of Tual, Indonesia -6.101°, 130.513° | 142.8 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.5 earthquake 253 km WSW of Tual, Indonesia with origin time 19:08 UTC on August 23, 2025. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 19:06:57 UTC | 2.2ml | 132 km E of Atka, Alaska 52.237°, -172.261° | 59.2 km | - | - | - | ✓ Reviewed | USGS → |
On August 23, 2025 at 19:06 UTC, a magnitude 2.2 earthquake struck 132 km E of Atka, Alaska. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 19:06:49 UTC | 4.8mb | 135 km SSE of Kyzyl-Suu, Kyrgyzstan 41.192°, 78.536° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 23, 2025 at 19:06 UTC, a magnitude 4.8 earthquake struck 135 km SSE of Kyzyl-Suu, Kyrgyzstan. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 19:00:46 UTC | 4.3mb | 178 km SE of Petropavlovsk-Kamchatsky, Russia 52.064°, 160.676° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 23, 2025, worldwide seismic activity registered a magnitude 4.3 earthquake 178 km SE of Petropavlovsk-Kamchatsky, Russia at 19:00 UTC. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-23 2025-08-23 18:54:50 UTC | 2.2ml | 33 km ESE of Cantwell, Alaska 63.306°, -148.299° | 10.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 33 km ESE of Cantwell, Alaska on August 23, 2025 at 18:54 UTC. Coming 1 hours after a magnitude 2.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.2 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 August 23, 2025. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.