Earthquakes on September 1, 2023
226
EARTHQUAKES on September 1, 2023
24-hour UTC period · USGS data
137 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
3
M4.0–4.9
21
M3.0–3.9
8
M2.0–2.9
66
M1.0–1.9
128
Activity Summary
226
Total earthquakes
~250
Daily average
Normal
Activity level
3
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
6.1
13 km E of Severo-Kuril’sk, Russia
20:49 UTC · 137.0 km deep
5.3
46 km SSW of Angoram, Papua New Guinea
19:09 UTC · 118.3 km deep
Felt by 6
5.0
South Sandwich Islands region
10:01 UTC · 29.5 km deep
4.9
2 km NNE of Istmina, Colombia
02:19 UTC · 10.0 km deep
Felt by 4
4.8
199 km SSW of Sinabang, Indonesia
18:25 UTC · 18.9 km deep
4.8
45 km SSW of Port-Vila, Vanuatu
15:05 UTC · 35.0 km deep
Felt by 13
4.7
44 km ENE of Kuril’sk, Russia
12:02 UTC · 139.6 km deep
4.6
87 km E of Kimbe, Papua New Guinea
22:44 UTC · 82.6 km deep
Earthquake Map — September 1, 2023
All Earthquakes — September 1, 2023
Showing 30 of 98 (filtered from 226)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-09-01 2023-09-01 23:57:28 UTC | 2.6ml | 27 km S of Atka, Alaska 51.950°, -174.251° | 78.3 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.6 earthquake 27 km S of Atka, Alaska at 23:57 UTC on September 1, 2023. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 23:56:53 UTC | 3.6md | 105 km ENE of Cruz Bay, U.S. Virgin Islands 18.803°, -63.926° | 38.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:56 UTC on September 1, 2023, a magnitude 3.6 tremor occurred 105 km ENE of Cruz Bay, U.S. Virgin Islands. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 23:56:51 UTC | 2.8md | 6 km WNW of The Geysers, CA 38.805°, -122.811° | 3.6 km | 2 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.8 event was detected 6 km WNW of The Geysers, CA on September 1, 2023, with origin time 23:56 UTC. In the 72 hours after this event, the USGS recorded 6 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 23:55:09 UTC | 4.5mwr | 65 km W of San Antonio de los Cobres, Argentina -24.169°, -66.957° | 191.1 km | - | - | - | ✓ Reviewed | USGS → |
On September 1, 2023 at 23:55 UTC, a magnitude 4.5 earthquake struck 65 km W of San Antonio de los Cobres, Argentina. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 23:46:44 UTC | 2.5md | 3 km SW of Guánica, Puerto Rico 17.946°, -66.927° | 16.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 seismic event took place 3 km SW of Guánica, Puerto Rico on September 1, 2023 at 23:46 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.7 earthquake that occurred about 8 hours earlier. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 23:44:47 UTC | 3.1ml | Rat Islands, Aleutian Islands, Alaska 51.803°, 178.248° | 104.9 km | - | - | - | ✓ Reviewed | USGS → |
September 1, 2023 brought a magnitude 3.1 earthquake near Rat Islands, Aleutian Islands, Alaska, logged at 23:44 UTC. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 23:30:16 UTC | 3.1ml | 13 km NNE of Shingletown, CA 40.602°, -121.829° | 14.0 km | 10 | - | - | ✓ Reviewed | USGS → |
On September 1, 2023 at 23:30 UTC, a magnitude 3.1 earthquake struck 13 km NNE of Shingletown, CA. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 23:06:39 UTC | 2.3md | 2 km E of Sabana Grande, Puerto Rico 18.077°, -66.937° | 7.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.3 event was detected 2 km E of Sabana Grande, Puerto Rico on September 1, 2023, with origin time 23:06 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.7 earthquake that occurred about 8 hours earlier. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 23:01:39 UTC | 4.4mwr | 51 km ENE of La Trinité, Martinique 14.901°, -60.517° | 53.6 km | 4 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.4 earthquake 51 km ENE of La Trinité, Martinique with origin time 23:01 UTC on September 1, 2023. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 22:46:23 UTC | 2.4ml | 67 km E of Chignik, Alaska 56.363°, -157.320° | 51.2 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.4 earthquake 67 km E of Chignik, Alaska with origin time 22:46 UTC on September 1, 2023. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 22:44:43 UTC | 4.6mb | 87 km E of Kimbe, Papua New Guinea -5.582°, 150.923° | 82.6 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.6 earthquake 87 km E of Kimbe, Papua New Guinea came in on September 1, 2023 at 22:44 UTC. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 22:16:00 UTC | 2.0md | 3 km SW of Guánica, Puerto Rico 17.948°, -66.926° | 16.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 3 km SW of Guánica, Puerto Rico on September 1, 2023 at 22:16 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.7 earthquake that occurred about 7 hours earlier. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 21:10:51 UTC | 4.2mb | 255 km N of Tobelo, Indonesia 4.038°, 128.054° | 79.1 km | - | - | - | ✓ Reviewed | USGS → |
September 1, 2023 brought a magnitude 4.2 earthquake 255 km N of Tobelo, Indonesia, logged at 21:10 UTC. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 20:49:54 UTC | 6.1mww | 13 km E of Severo-Kuril’sk, Russia 50.679°, 156.313° | 137.0 km | - | IV | green | ✓ Reviewed | USGS → |
On September 1, 2023 at 20:49 UTC, a magnitude 6.1 earthquake struck 13 km E of Severo-Kuril’sk, Russia. 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 September 1, 2023. See the M6.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 20:43:46 UTC | 2.2ml | 67 km W of Salamatof, Alaska 60.719°, -152.535° | 7.5 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.2 earthquake 67 km W of Salamatof, Alaska came in on September 1, 2023 at 20:43 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 20:43:01 UTC | 2.6ml | 2 km SE of Perry, Oklahoma 36.268°, -97.269° | 5.6 km | 6 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.6 earthquake 2 km SE of Perry, Oklahoma with origin time 20:43 UTC on September 1, 2023. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 19:40:26 UTC | 2.5ml | 93 km SSE of Nikolski, Alaska 52.173°, -168.289° | 27.8 km | - | - | - | ✓ Reviewed | USGS → |
At 19:40 UTC on September 1, 2023, a magnitude 2.5 tremor occurred 93 km SSE of Nikolski, Alaska. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 19:22:37 UTC | 2.1ml | 25 km SSW of Nanwalek, Alaska 59.158°, -152.145° | 55.7 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.1 earthquake 25 km SSW of Nanwalek, Alaska at 19:22 UTC on September 1, 2023. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 19:10:43 UTC | 2.5md | 8 km SE of La Parguera, Puerto Rico 17.919°, -66.985° | 8.1 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 earthquake was recorded 8 km SE of La Parguera, Puerto Rico on September 1, 2023 at 19:10 UTC. It arrived roughly 4 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 M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 19:09:00 UTC | 5.3mww | 46 km SSW of Angoram, Papua New Guinea -4.416°, 143.841° | 118.3 km | 6 | - | - | ✓ Reviewed | USGS → |
A magnitude 5.3 earthquake was recorded 46 km SSW of Angoram, Papua New Guinea on September 1, 2023 at 19:09 UTC. See the M5.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 18:35:27 UTC | 3.5ml | 233 km SSE of King Cove, Alaska 53.112°, -161.010° | 17.8 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.5 event was detected 233 km SSE of King Cove, Alaska on September 1, 2023, with origin time 18:35 UTC. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 18:25:38 UTC | 4.8mb | 199 km SSW of Sinabang, Indonesia 0.764°, 95.830° | 18.9 km | - | - | - | ✓ Reviewed | USGS → |
At 18:25 UTC on September 1, 2023, a magnitude 4.8 tremor occurred 199 km SSW of Sinabang, Indonesia. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 18:02:33 UTC | 2.3ml | 6 km SW of Volcano, Hawaii 19.398°, -155.279° | 1.4 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.3 earthquake 6 km SW of Volcano, Hawaii at 18:02 UTC on September 1, 2023. It arrived roughly 10 hours after a larger magnitude 2.7 mainshock in the same 20 km area, placing it within the typical aftershock window. 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. | ||||||||
2023-09-01 2023-09-01 17:51:23 UTC | 2.1ml | 60 km S of Whites City, New Mexico 31.635°, -104.497° | 6.4 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 60 km S of Whites City, New Mexico on September 1, 2023, with origin time 17:51 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 17:36:41 UTC | 2.5md | 2 km SW of Fuig, Puerto Rico 17.974°, -66.931° | 13.9 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.5 earthquake 2 km SW of Fuig, Puerto Rico at 17:36 UTC on September 1, 2023. This event falls inside the aftershock decay of a nearby magnitude 2.7 earthquake that occurred about 2 hours earlier. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 17:19:15 UTC | 2.0md | 3 km SW of Guánica, Puerto Rico 17.948°, -66.926° | 16.5 km | - | - | - | ✓ Reviewed | USGS → |
On September 1, 2023 at 17:19 UTC, a magnitude 2.0 earthquake struck 3 km SW of Guánica, Puerto Rico. It arrived roughly 2 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. | ||||||||
2023-09-01 2023-09-01 17:16:48 UTC | 2.3md | 1 km WSW of Fuig, Puerto Rico 17.984°, -66.925° | 14.1 km | - | - | - | ✓ Reviewed | USGS → |
On September 1, 2023, worldwide seismic activity registered a magnitude 2.3 earthquake 1 km WSW of Fuig, Puerto Rico at 17:16 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.7 earthquake that occurred about 2 hours earlier. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 17:16:39 UTC | 2.3mb_lg | Ohio 41.753°, -81.007° | 8.8 km | 3 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 seismic event took place near Ohio on September 1, 2023 at 17:16 UTC. Coming 1 hours after a magnitude 2.4 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 17:02:58 UTC | 2.9ml | 7 km SSE of Talkeetna, Alaska 62.262°, -150.074° | 49.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.9 earthquake 7 km SSE of Talkeetna, Alaska with origin time 17:02 UTC on September 1, 2023. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-01 2023-09-01 16:53:39 UTC | 2.2mb_lg | 2 km E of Madison, Ohio 41.773°, -81.015° | 5.0 km | 2 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 2 km E of Madison, Ohio on September 1, 2023 at 16:53 UTC. It arrived roughly 1 hours after a larger magnitude 2.4 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. 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 September 1, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.