Earthquakes on September 12, 2023
228
EARTHQUAKES on September 12, 2023
24-hour UTC period · USGS data
31 km deep · 17 people felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
6
M4.0–4.9
24
M3.0–3.9
10
M2.0–2.9
53
M1.0–1.9
135
Activity Summary
228
Total earthquakes
~250
Daily average
Normal
Activity level
6
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
6.2
69 km N of Namuac, Philippines
11:03 UTC · 31.1 km deep
Felt by 17
5.3
Tarapaca, Chile
04:58 UTC · 110.9 km deep
Felt by 16
5.1
45 km SW of La Esperanza (El Zapotal), Mexico
02:40 UTC · 64.4 km deep
Felt by 3
5.1
51 km WNW of Kirakira, Solomon Islands
01:18 UTC · 71.1 km deep
5.0
44 km SSE of Adak, Alaska
23:17 UTC · 49.5 km deep
Felt by 2
5.0
214 km ESE of Tadine, New Caledonia
01:38 UTC · 10.0 km deep
4.9
108 km SSW of False Pass, Alaska
21:48 UTC · 46.8 km deep
4.9
76 km ESE of Tatsugō, Japan
08:57 UTC · 10.0 km deep
Earthquake Map — September 12, 2023
All Earthquakes — September 12, 2023
Showing 30 of 93 (filtered from 228)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-09-12 2023-09-12 23:53:37 UTC | 4.2mb | 224 km WSW of Olonkinbyen, Svalbard and Jan Mayen 70.494°, -14.671° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.2 earthquake 224 km WSW of Olonkinbyen, Svalbard and Jan Mayen with origin time 23:53 UTC on September 12, 2023. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 23:40:34 UTC | 2.7ml | 91 km SE of King Cove, Alaska 54.447°, -161.376° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.7 earthquake 91 km SE of King Cove, Alaska came in on September 12, 2023 at 23:40 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 23:23:16 UTC | 3.2ml | 45 km NNW of Atka, Alaska 52.581°, -174.438° | 180.2 km | - | - | - | ✓ Reviewed | USGS → |
At 23:23 UTC on September 12, 2023, a magnitude 3.2 tremor occurred 45 km NNW of Atka, Alaska. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 23:17:37 UTC | 5.0mb | 44 km SSE of Adak, Alaska 51.493°, -176.422° | 49.5 km | 2 | III | - | ✓ Reviewed | USGS → |
At 23:17 UTC on September 12, 2023, a magnitude 5.0 tremor occurred 44 km SSE of Adak, Alaska. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 23:11:26 UTC | 4.3mb | 7 km NNE of Jordán, Colombia 6.802°, -73.082° | 153.5 km | - | - | - | ✓ Reviewed | USGS → |
On September 12, 2023 at 23:11 UTC, a magnitude 4.3 earthquake struck 7 km NNE of Jordán, Colombia. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 22:33:52 UTC | 2.1ml | 54 km WNW of Happy Valley, Alaska 60.124°, -152.643° | 85.5 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 54 km WNW of Happy Valley, Alaska on September 12, 2023 at 22:33 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 22:09:59 UTC | 2.9ml | 144 km SW of Adak, Alaska 51.043°, -178.237° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 12, 2023 at 22:09 UTC, a magnitude 2.9 earthquake struck 144 km SW of Adak, Alaska. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 22:06:36 UTC | 2.0ml | 41 km E of Pedro Bay, Alaska 59.819°, -153.370° | 130.5 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.0 earthquake 41 km E of Pedro Bay, Alaska at 22:06 UTC on September 12, 2023. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 22:01:06 UTC | 2.6ml | 4 km W of Lemitar, New Mexico 34.154°, -106.958° | 5.0 km | 15 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.6 earthquake 4 km W of Lemitar, New Mexico with origin time 22:01 UTC on September 12, 2023. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 21:48:57 UTC | 4.9mb | 108 km SSW of False Pass, Alaska 53.962°, -164.079° | 46.8 km | - | III | - | ✓ Reviewed | USGS → |
This magnitude 4.9 event was detected 108 km SSW of False Pass, Alaska on September 12, 2023, with origin time 21:48 UTC. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 21:13:41 UTC | 2.1ml | 55 km S of Whites City, New Mexico 31.675°, -104.341° | 6.7 km | - | - | - | ✓ Reviewed | USGS → |
September 12, 2023 brought a magnitude 2.1 earthquake 55 km S of Whites City, New Mexico, logged at 21:13 UTC. It arrived roughly 4 hours after a larger magnitude 2.8 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 21:12:22 UTC | 3.7ml | 49 km ESE of Atka, Alaska 51.952°, -173.601° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 12, 2023 at 21:12 UTC, a magnitude 3.7 earthquake struck 49 km ESE of Atka, Alaska. See the M3.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 20:59:07 UTC | 2.3ml | 15 km SE of Halfway, Oregon 44.799°, -116.954° | 1.6 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.3 earthquake 15 km SE of Halfway, Oregon with origin time 20:59 UTC on September 12, 2023. 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. | ||||||||
2023-09-12 2023-09-12 20:19:43 UTC | 2.0md | 25 km E of Honaunau-Napoopoo, Hawaii 19.481°, -155.621° | 8.5 km | - | - | - | ✓ Reviewed | USGS → |
At 20:19 UTC on September 12, 2023, a magnitude 2.0 tremor occurred 25 km E of Honaunau-Napoopoo, Hawaii. It arrived roughly 10 hours after a larger magnitude 2.2 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. | ||||||||
2023-09-12 2023-09-12 19:17:20 UTC | 2.1ml | 79 km SSE of Akutan, Alaska 53.435°, -165.524° | 37.1 km | - | - | - | ✓ Reviewed | USGS → |
On September 12, 2023 at 19:17 UTC, a magnitude 2.1 earthquake struck 79 km SSE of Akutan, Alaska. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 19:10:08 UTC | 4.2mb | 47 km ESE of Ambunti, Papua New Guinea -4.310°, 143.234° | 81.9 km | - | - | - | ✓ Reviewed | USGS → |
On September 12, 2023, worldwide seismic activity registered a magnitude 4.2 earthquake 47 km ESE of Ambunti, Papua New Guinea at 19:10 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 18:55:51 UTC | 4.4mb | 117 km N of Hicks Bay, New Zealand -36.548°, 178.405° | 94.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.4 event was detected 117 km N of Hicks Bay, New Zealand on September 12, 2023, with origin time 18:55 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 18:38:58 UTC | 4.0mb | 45 km WNW of San Antonio de los Cobres, Argentina -24.138°, -66.753° | 189.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.0 seismic event took place 45 km WNW of San Antonio de los Cobres, Argentina on September 12, 2023 at 18:38 UTC. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 18:36:54 UTC | 4.1mb | 23 km E of Inarajan Village, Guam 13.287°, 144.965° | 53.9 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.1 event was detected 23 km E of Inarajan Village, Guam on September 12, 2023, with origin time 18:36 UTC. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 18:34:36 UTC | 4.3mb | Mauritius - Reunion region -20.140°, 66.429° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 earthquake was recorded in the Mauritius - Reunion region on September 12, 2023 at 18:34 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 18:10:26 UTC | 3.1ml | 43 km S of Sand Point, Alaska 54.945°, -160.499° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.1 earthquake 43 km S of Sand Point, Alaska came in on September 12, 2023 at 18:10 UTC. The event was offshore. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 18:06:44 UTC | 4.4mb | 85 km NW of Gizo, Solomon Islands -7.526°, 156.330° | 9.6 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.4 earthquake 85 km NW of Gizo, Solomon Islands came in on September 12, 2023 at 18:06 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 17:48:42 UTC | 3.3ml | 133 km N of Nikolski, Alaska 54.135°, -168.834° | 7.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.3 earthquake 133 km N of Nikolski, Alaska with origin time 17:48 UTC on September 12, 2023. The event was offshore. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 17:26:34 UTC | 3.1ml | 12 km NNE of Colstrip, Montana 45.983°, -106.549° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.1 seismic event took place 12 km NNE of Colstrip, Montana on September 12, 2023 at 17:26 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. | ||||||||
2023-09-12 2023-09-12 17:26:14 UTC | 2.7ml | 227 km W of Adak, Alaska 51.643°, -179.911° | 79.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.7 seismic event took place 227 km W of Adak, Alaska on September 12, 2023 at 17:26 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 17:25:20 UTC | 2.7ml | Washington 47.646°, -117.688° | 7.8 km | 97 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.7 event was detected near Washington on September 12, 2023, with origin time 17:25 UTC. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 17:19:15 UTC | 2.8ml | 55 km S of Whites City, New Mexico 31.676°, -104.431° | 6.8 km | - | - | - | ✓ Reviewed | USGS → |
On September 12, 2023, worldwide seismic activity registered a magnitude 2.8 earthquake 55 km S of Whites City, New Mexico at 17:19 UTC. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 17:19:14 UTC | 2.2md | 10 km NW of Dover, Idaho 48.318°, -116.713° | -0.7 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.2 event was detected 10 km NW of Dover, Idaho on September 12, 2023, with origin time 17:19 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. | ||||||||
2023-09-12 2023-09-12 17:17:08 UTC | 4.6mb | 22 km SSE of Neiafu, Tonga -18.846°, -173.922° | 67.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 12, 2023 at 17:17 UTC, a magnitude 4.6 earthquake struck 22 km SSE of Neiafu, Tonga. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-12 2023-09-12 17:08:34 UTC | 2.1ml | 62 km ESE of Denali National Park, Alaska 63.283°, -150.614° | 127.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 62 km ESE of Denali National Park, Alaska on September 12, 2023 at 17:08 UTC. 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 September 12, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.