Earthquakes on August 1, 2023
285
EARTHQUAKES on August 1, 2023
24-hour UTC period · USGS data
12 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
5
M4.0–4.9
40
M3.0–3.9
12
M2.0–2.9
58
M1.0–1.9
170
Activity Summary
285
Total earthquakes
~250
Daily average
Normal
Activity level
5
M5.0+ events
Geographic Breakdown
Top Countries (International)
Significant Earthquakes (M4.5+)
5.7
Komandorskiye Ostrova, Russia region
16:49 UTC · 12.4 km deep
5.6
Eritrea
17:15 UTC · 7.0 km deep
Felt by 10
5.4
72 km N of Namuac, Philippines
08:03 UTC · 32.2 km deep
5.0
south of the Kermadec Islands
20:42 UTC · 10.0 km deep
5.0
87 km WNW of Kirakira, Solomon Islands
09:39 UTC · 108.6 km deep
4.9
south of the Kermadec Islands
23:50 UTC · 10.0 km deep
4.9
1 km ENE of Ōdate, Japan
13:07 UTC · 125.2 km deep
4.9
171 km NE of Lospalos, Timor Leste
12:13 UTC · 150.1 km deep
Earthquake Map — August 1, 2023
All Earthquakes — August 1, 2023
Showing 30 of 115 (filtered from 285)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-08-01 2023-08-01 23:51:08 UTC | 2.2md | 7 km NW of The Geysers, CA 38.825°, -122.809° | 2.9 km | - | - | - | ✓ Reviewed | USGS → |
August 1, 2023 brought a magnitude 2.2 earthquake 7 km NW of The Geysers, CA, logged at 23:51 UTC. Coming 1 hours after a magnitude 2.3 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 M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 23:50:09 UTC | 4.9mb | south of the Kermadec Islands -32.730°, -178.183° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.9 earthquake south of the Kermadec Islands at 23:50 UTC on August 1, 2023. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 23:45:59 UTC | 3.2ml | 102 km ENE of Chignik, Alaska 56.549°, -156.805° | 29.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.2 earthquake was recorded 102 km ENE of Chignik, Alaska on August 1, 2023 at 23:45 UTC. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 23:25:31 UTC | 4.7mb | south of the Fiji Islands -23.652°, -179.895° | 543.7 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.7 earthquake south of the Fiji Islands with origin time 23:25 UTC on August 1, 2023. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 23:23:32 UTC | 2.1md | 7 km NW of The Geysers, CA 38.827°, -122.808° | 2.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 7 km NW of The Geysers, CA on August 1, 2023 at 23:23 UTC. Coming 1 hours after a magnitude 2.3 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. | ||||||||
2023-08-01 2023-08-01 23:23:21 UTC | 2.3md | 7 km NW of The Geysers, CA 38.827°, -122.807° | 3.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.3 earthquake 7 km NW of The Geysers, CA with origin time 23:23 UTC on August 1, 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 M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 23:15:05 UTC | 4.3mb | eastern New Guinea region, Papua New Guinea -7.859°, 148.050° | 45.9 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.3 earthquake in the eastern New Guinea region, Papua New Guinea came in on August 1, 2023 at 23:15 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 23:14:34 UTC | 3.1ml | 83 km SSE of Adak, Alaska 51.157°, -176.293° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 1, 2023, worldwide seismic activity registered a magnitude 3.1 earthquake 83 km SSE of Adak, Alaska at 23:14 UTC. Coming 14 hours after a magnitude 3.4 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 23:08:21 UTC | 2.0md | 1 km SSW of Pāhala, Hawaii 19.193°, -155.485° | 28.7 km | - | - | - | Auto | USGS → |
Reports of a magnitude 2.0 earthquake 1 km SSW of Pāhala, Hawaii came in on August 1, 2023 at 23:08 UTC. Coming 5 hours after a magnitude 2.1 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. | ||||||||
2023-08-01 2023-08-01 23:07:34 UTC | 4.3mb | 261 km SSE of Port Blair, India 9.505°, 93.713° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 seismic event took place 261 km SSE of Port Blair, India on August 1, 2023 at 23:07 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 23:06:05 UTC | 4.6mb | south of the Kermadec Islands -32.752°, -178.176° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:06 UTC on August 1, 2023, a magnitude 4.6 tremor occurred south of the Kermadec Islands. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 22:54:54 UTC | 2.8ml | 137 km SE of Akutan, Alaska 53.315°, -164.213° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
August 1, 2023 brought a magnitude 2.8 earthquake 137 km SE of Akutan, Alaska, logged at 22:54 UTC. Coming 3 hours after a magnitude 4.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 22:50:56 UTC | 2.6md | 1 km E of Palomas, Puerto Rico 18.015°, -66.860° | 11.3 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.6 earthquake 1 km E of Palomas, Puerto Rico at 22:50 UTC on August 1, 2023. Coming 11 hours after a magnitude 2.8 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 22:29:43 UTC | 2.2ml | 87 km WNW of Aleneva, Alaska 58.473°, -154.177° | 83.8 km | - | - | - | ✓ Reviewed | USGS → |
On August 1, 2023 at 22:29 UTC, a magnitude 2.2 earthquake struck 87 km WNW of Aleneva, Alaska. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 22:26:07 UTC | 2.0ml | Western Montana 45.295°, -112.607° | 7.4 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.0 earthquake near Western Montana at 22:26 UTC on August 1, 2023. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 22:22:57 UTC | 4.4mb | 245 km SSE of Sarangani, Philippines 3.519°, 126.639° | 59.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 1, 2023, worldwide seismic activity registered a magnitude 4.4 earthquake 245 km SSE of Sarangani, Philippines at 22:22 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 21:52:46 UTC | 4.3mb | 29 km S of Palekastro, Greece 34.936°, 26.234° | 39.8 km | - | - | - | ✓ Reviewed | USGS → |
August 1, 2023 brought a magnitude 4.3 earthquake 29 km S of Palekastro, Greece, logged at 21:52 UTC. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 21:21:02 UTC | 4.5mb | 178 km W of Panguna, Papua New Guinea -6.513°, 153.886° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.5 event was detected 178 km W of Panguna, Papua New Guinea on August 1, 2023, with origin time 21:21 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 21:11:51 UTC | 2.2ml | 54 km SE of San Clemente Is. (SE tip), CA 32.496°, -117.913° | 5.9 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.2 earthquake 54 km SE of San Clemente Is. (SE tip), CA came in on August 1, 2023 at 21:11 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 21:06:29 UTC | 4.2mb | 39 km SSW of Massawa, Eritrea 15.257°, 39.400° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.2 earthquake 39 km SSW of Massawa, Eritrea with origin time 21:06 UTC on August 1, 2023. Coming 4 hours after a magnitude 5.6 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 20:44:35 UTC | 2.0ml | 97 km SSE of Sand Point, Alaska 54.534°, -159.881° | 6.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 97 km SSE of Sand Point, Alaska on August 1, 2023 at 20:44 UTC. It arrived roughly 12 hours after a larger magnitude 2.1 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 20:42:12 UTC | 5.0mb | south of the Kermadec Islands -32.684°, -178.418° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 1, 2023, worldwide seismic activity registered a magnitude 5.0 earthquake south of the Kermadec Islands at 20:42 UTC. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 20:14:51 UTC | 4.1mb | Molucca Sea 1.788°, 126.287° | 51.8 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.1 earthquake near Molucca Sea came in on August 1, 2023 at 20:14 UTC. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 20:06:06 UTC | 2.2ml | 39 km SSW of Skwentna, Alaska 61.688°, -151.798° | 93.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 39 km SSW of Skwentna, Alaska on August 1, 2023 at 20:06 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 19:41:52 UTC | 4.8mb | Kermadec Islands, New Zealand -29.002°, -177.524° | 64.4 km | - | - | - | ✓ Reviewed | USGS → |
August 1, 2023 brought a magnitude 4.8 earthquake near Kermadec Islands, New Zealand, logged at 19:41 UTC. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 19:40:22 UTC | 4.5mwr | 139 km SE of Akutan, Alaska 53.340°, -164.138° | 6.9 km | - | I | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.5 earthquake 139 km SE of Akutan, Alaska came in on August 1, 2023 at 19:40 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 19:39:09 UTC | 2.0ml | 21 km NNW of Midland, Texas 32.177°, -102.165° | 9.6 km | - | - | - | ✓ Reviewed | USGS → |
August 1, 2023 brought a magnitude 2.0 earthquake 21 km NNW of Midland, Texas, logged at 19:39 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 19:37:58 UTC | 4.4mb | 37 km NNE of Adi Keyh, Eritrea 15.166°, 39.481° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 19:37 UTC on August 1, 2023, a magnitude 4.4 tremor occurred 37 km NNE of Adi Keyh, Eritrea. It arrived roughly 2 hours after a larger magnitude 5.6 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 19:36:59 UTC | 4.1mb | Pulau Pulau Tanimbar, Indonesia -7.887°, 130.596° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.1 seismic event took place near Pulau Pulau Tanimbar, Indonesia on August 1, 2023 at 19:36 UTC. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-01 2023-08-01 19:29:03 UTC | 4.3mb | Davis Strait 61.416°, -59.793° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 1, 2023 at 19:29 UTC, a magnitude 4.3 earthquake struck near Davis Strait. 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 August 1, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.