Earthquakes on August 12, 2023
243
EARTHQUAKES on August 12, 2023
24-hour UTC period · USGS data
LARGEST: M5.0 — 96 km NNE of Poso, Indonesia
18 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
1
M4.0–4.9
26
M3.0–3.9
12
M2.0–2.9
52
M1.0–1.9
152
Activity Summary
243
Total earthquakes
~250
Daily average
Normal
Activity level
1
M5.0+ events
Significant Earthquakes (M4.5+)
5.0
96 km NNE of Poso, Indonesia
13:20 UTC · 18.4 km deep
4.9
Kermadec Islands region
23:43 UTC · 10.0 km deep
4.8
78 km SSE of Desaguadero, Peru
23:52 UTC · 182.3 km deep
4.8
201 km WNW of Lorengau, Papua New Guinea
22:41 UTC · 10.0 km deep
4.8
30 km W of Kandrian, Papua New Guinea
17:17 UTC · 66.7 km deep
4.7
3 km WSW of Yeşilyurt, Turkey
13:39 UTC · 10.0 km deep
Felt by 6
4.6
99 km S of Koshima, Japan
04:24 UTC · 40.9 km deep
4.5
132 km NE of Lospalos, Timor Leste
18:28 UTC · 143.8 km deep
Earthquake Map — August 12, 2023
All Earthquakes — August 12, 2023
Showing 30 of 91 (filtered from 243)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-08-12 2023-08-12 23:52:59 UTC | 4.8mb | 78 km SSE of Desaguadero, Peru -17.254°, -68.881° | 182.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.8 earthquake 78 km SSE of Desaguadero, Peru with origin time 23:52 UTC on August 12, 2023. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 23:43:24 UTC | 4.9mb | Kermadec Islands region -30.053°, -176.311° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.9 earthquake was recorded in the Kermadec Islands region on August 12, 2023 at 23:43 UTC. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 23:33:09 UTC | 4.4mb | 118 km WNW of Sinabang, Indonesia 2.742°, 95.351° | 21.2 km | - | - | - | ✓ Reviewed | USGS → |
On August 12, 2023 at 23:33 UTC, a magnitude 4.4 earthquake struck 118 km WNW of Sinabang, Indonesia. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 22:48:44 UTC | 4.2mb | 224 km WNW of Lorengau, Papua New Guinea -1.355°, 145.370° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
August 12, 2023 brought a magnitude 4.2 earthquake 224 km WNW of Lorengau, Papua New Guinea, logged at 22:48 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 22:41:22 UTC | 4.8mb | 201 km WNW of Lorengau, Papua New Guinea -1.420°, 145.563° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 12, 2023, worldwide seismic activity registered a magnitude 4.8 earthquake 201 km WNW of Lorengau, Papua New Guinea at 22:41 UTC. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 22:34:51 UTC | 2.1ml | Rat Islands, Aleutian Islands, Alaska 51.720°, 178.764° | 73.3 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.1 earthquake near Rat Islands, Aleutian Islands, Alaska at 22:34 UTC on August 12, 2023. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 22:08:32 UTC | 2.1ml | 211 km W of Adak, Alaska 51.957°, -179.711° | 143.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 211 km W of Adak, Alaska on August 12, 2023, with origin time 22:08 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 21:52:12 UTC | 4.4mb | 85 km ENE of Alianza Cristiana, Peru -3.180°, -75.720° | 130.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded 85 km ENE of Alianza Cristiana, Peru on August 12, 2023 at 21:52 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 21:40:18 UTC | 3.0md | Puerto Rico region 17.745°, -66.285° | 19.6 km | 1 | - | - | ✓ Reviewed | USGS → |
August 12, 2023 brought a magnitude 3.0 earthquake in the Puerto Rico region, logged at 21:40 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 21:14:31 UTC | 2.0ml | 23 km NE of Beluga, Alaska 61.268°, -150.732° | 56.9 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 23 km NE of Beluga, Alaska with origin time 21:14 UTC on August 12, 2023. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 21:07:32 UTC | 4.3mb | 151 km SSE of Hihifo, Tonga -17.264°, -173.378° | 24.1 km | - | - | - | ✓ Reviewed | USGS → |
At 21:07 UTC on August 12, 2023, a magnitude 4.3 tremor occurred 151 km SSE of Hihifo, Tonga. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 20:51:28 UTC | 2.9ml | 73 km NW of Nikolski, Alaska 53.459°, -169.538° | 199.2 km | - | - | - | ✓ Reviewed | USGS → |
On August 12, 2023 at 20:51 UTC, a magnitude 2.9 earthquake struck 73 km NW of Nikolski, Alaska. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 20:46:20 UTC | 4.1mb | 185 km N of Nagqu, China 33.136°, 92.295° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 20:46 UTC on August 12, 2023, a magnitude 4.1 tremor occurred 185 km N of Nagqu, China. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 20:27:19 UTC | 3.4md | 62 km W of Rincón, Puerto Rico 18.251°, -67.832° | 89.6 km | - | - | - | ✓ Reviewed | USGS → |
August 12, 2023 brought a magnitude 3.4 earthquake 62 km W of Rincón, Puerto Rico, logged at 20:27 UTC. The event was offshore. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 20:25:04 UTC | 4.2mb | 282 km WNW of Houma, Tonga -20.081°, -177.749° | 527.8 km | - | - | - | ✓ Reviewed | USGS → |
On August 12, 2023 at 20:25 UTC, a magnitude 4.2 earthquake struck 282 km WNW of Houma, Tonga. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 20:17:48 UTC | 3.1ml | 7 km WNW of Wright, Wyoming 43.779°, -105.583° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.1 event was detected 7 km WNW of Wright, Wyoming on August 12, 2023, with origin time 20:17 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 20:14:29 UTC | 4.2mb | 192 km ENE of Levuka, Fiji -17.616°, -178.929° | 531.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.2 earthquake was recorded 192 km ENE of Levuka, Fiji on August 12, 2023 at 20:14 UTC. This is the deepest earthquake in the current dataset — a deep-focus event. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 20:09:08 UTC | 4.2mb | 69 km NNW of Asan-Maina Village, Guam 14.051°, 144.461° | 191.7 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.2 earthquake 69 km NNW of Asan-Maina Village, Guam with origin time 20:09 UTC on August 12, 2023. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 19:59:47 UTC | 2.8ml | 97 km SE of Akutan, Alaska 53.623°, -164.577° | 30.7 km | - | - | - | ✓ Reviewed | USGS → |
At 19:59 UTC on August 12, 2023, a magnitude 2.8 tremor occurred 97 km SE of Akutan, Alaska. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 19:53:08 UTC | 2.7ml | 263 km W of Adak, Alaska 52.079°, 179.544° | 196.5 km | - | - | - | ✓ Reviewed | USGS → |
August 12, 2023 brought a magnitude 2.7 earthquake 263 km W of Adak, Alaska, logged at 19:53 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 19:43:50 UTC | 2.3ml | 162 km ESE of Akutan, Alaska 53.380°, -163.669° | 25.7 km | - | - | - | ✓ Reviewed | USGS → |
At 19:43 UTC on August 12, 2023, a magnitude 2.3 tremor occurred 162 km ESE of Akutan, Alaska. This event falls inside the aftershock decay of a nearby magnitude 4.2 earthquake that occurred about 1 hours earlier. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 19:16:08 UTC | 2.8ml | 96 km ESE of Atka, Alaska 51.851°, -172.915° | 149.3 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.8 earthquake 96 km ESE of Atka, Alaska at 19:16 UTC on August 12, 2023. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 19:11:16 UTC | 2.9ml | Rat Islands, Aleutian Islands, Alaska 51.163°, 178.974° | 28.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 earthquake was recorded near Rat Islands, Aleutian Islands, Alaska on August 12, 2023 at 19:11 UTC. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 19:04:06 UTC | 2.7ml | 80 km SSE of Nikolski, Alaska 52.310°, -168.263° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 12, 2023 at 19:04 UTC, a magnitude 2.7 earthquake struck 80 km SSE of Nikolski, Alaska. Coming 1 hours after a magnitude 3.2 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. | ||||||||
2023-08-12 2023-08-12 18:55:38 UTC | 3.2ml | 90 km SSE of Nikolski, Alaska 52.213°, -168.271° | 26.2 km | - | - | - | ✓ Reviewed | USGS → |
At 18:55 UTC on August 12, 2023, a magnitude 3.2 tremor occurred 90 km SSE of Nikolski, Alaska. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 18:49:46 UTC | 4.2mwr | Unimak Island region, Alaska 53.392°, -163.745° | 20.7 km | - | I | - | ✓ Reviewed | USGS → |
On August 12, 2023, worldwide seismic activity registered a magnitude 4.2 earthquake in the Unimak Island region, Alaska at 18:49 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 18:43:58 UTC | 2.3ml | Wyoming 44.061°, -110.309° | 8.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 12, 2023, worldwide seismic activity registered a magnitude 2.3 earthquake near Wyoming at 18:43 UTC. It arrived roughly 1 hours after a larger magnitude 2.7 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. | ||||||||
2023-08-12 2023-08-12 18:38:51 UTC | 2.7ml | 54 km NNE of Kelly, Wyoming 44.060°, -110.303° | 8.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.7 seismic event took place 54 km NNE of Kelly, Wyoming on August 12, 2023 at 18:38 UTC. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-12 2023-08-12 18:32:14 UTC | 2.2ml | Wyoming 44.052°, -110.286° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded near Wyoming on August 12, 2023 at 18:32 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. | ||||||||
2023-08-12 2023-08-12 18:28:31 UTC | 4.5mb | 132 km NE of Lospalos, Timor Leste -7.546°, 127.689° | 143.8 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.5 earthquake 132 km NE of Lospalos, Timor Leste came in on August 12, 2023 at 18:28 UTC. The event was offshore. See the M4.5 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 12, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.