Earthquakes on October 1, 2023
306
EARTHQUAKES on October 1, 2023
24-hour UTC period · USGS data
113 km deep · 11 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
1
M4.0–4.9
32
M3.0–3.9
16
M2.0–2.9
90
M1.0–1.9
167
Activity Summary
306
Total earthquakes
~250
Daily average
Elevated
Activity level
1
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
5.3
16 km W of Sukabumi, Indonesia
04:00 UTC · 113.0 km deep
Felt by 11
4.9
0 km ENE of Hihifo, Tonga
12:54 UTC · 76.8 km deep
4.9
113 km ESE of Pangai, Tonga
04:04 UTC · 10.0 km deep
4.7
northern Mid-Atlantic Ridge
06:37 UTC · 10.0 km deep
4.7
northern Mid-Atlantic Ridge
05:42 UTC · 10.0 km deep
4.7
260 km S of Kencong, Indonesia
00:18 UTC · 10.0 km deep
4.6
21 km ENE of Santa Maria, Philippines
22:54 UTC · 78.0 km deep
4.6
35 km E of Ambunti, Papua New Guinea
10:25 UTC · 109.3 km deep
Earthquake Map — October 1, 2023
All Earthquakes — October 1, 2023
Showing 30 of 139 (filtered from 306)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-10-01 2023-10-01 23:57:09 UTC | 2.0ml(texnet) | 56 km S of Whites City, New Mexico 31.669°, -104.378° | 6.1 km | - | - | - | ✓ Reviewed | USGS → |
October 1, 2023 brought a magnitude 2.0 earthquake 56 km S of Whites City, New Mexico, logged at 23:57 UTC. It arrived roughly 14 hours after a larger magnitude 2.5 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. | ||||||||
2023-10-01 2023-10-01 23:51:59 UTC | 2.2ml(texnet) | 16 km N of Bishop Hills, Texas 35.412°, -101.957° | 4.2 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.2 earthquake 16 km N of Bishop Hills, Texas with origin time 23:51 UTC on October 1, 2023. 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. | ||||||||
2023-10-01 2023-10-01 23:50:21 UTC | 4.5mb | 253 km S of Merizo Village, Guam 10.973°, 144.596° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 seismic event took place 253 km S of Merizo Village, Guam on October 1, 2023 at 23:50 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 23:49:47 UTC | 2.6ml | 15 km S of Volcano, Hawaii 19.305°, -155.214° | 1.2 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.6 event was detected 15 km S of Volcano, Hawaii on October 1, 2023, with origin time 23:49 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 23:49:15 UTC | 2.1ml | 15 km S of Volcano, Hawaii 19.309°, -155.212° | 8.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 15 km S of Volcano, Hawaii on October 1, 2023 at 23:49 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 23:46:02 UTC | 2.7md | 16 km SSE of Maria Antonia, Puerto Rico 17.838°, -66.838° | 6.7 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.7 earthquake 16 km SSE of Maria Antonia, Puerto Rico came in on October 1, 2023 at 23:46 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.3 earthquake that occurred about 15 hours earlier. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 23:41:27 UTC | 2.1md | 26 km W of Sunnyside-Tahoe City, CA 39.190°, -120.460° | -1.9 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 26 km W of Sunnyside-Tahoe City, CA on October 1, 2023, with origin time 23:41 UTC. This is the shallowest earthquake in the current dataset — a shallow crustal event. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 23:28:24 UTC | 4.5mb | Izu Islands, Japan region 29.669°, 140.005° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
October 1, 2023 brought a magnitude 4.5 earthquake in the Izu Islands, Japan region, logged at 23:28 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 22:57:03 UTC | 2.3ml | 2 km SW of Pāhala, Hawaii 19.188°, -155.494° | 34.5 km | - | - | - | Auto | USGS → |
October 1, 2023 brought a magnitude 2.3 earthquake 2 km SW of Pāhala, Hawaii, logged at 22:57 UTC. It arrived roughly 4 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 M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 22:54:27 UTC | 4.6mb | 21 km ENE of Santa Maria, Philippines 8.033°, 126.636° | 78.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.6 event was detected 21 km ENE of Santa Maria, Philippines on October 1, 2023, with origin time 22:54 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 22:44:29 UTC | 4.5mb | 228 km ENE of Levuka, Fiji -17.479°, -178.615° | 546.0 km | - | - | - | ✓ Reviewed | USGS → |
On October 1, 2023 at 22:44 UTC, a magnitude 4.5 earthquake struck 228 km ENE of Levuka, Fiji. This is the deepest earthquake in the current dataset — a deep-focus event. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 22:43:56 UTC | 2.9ml | 99 km SE of Akutan, Alaska 53.524°, -164.665° | 31.1 km | - | - | - | ✓ Reviewed | USGS → |
October 1, 2023 brought a magnitude 2.9 earthquake 99 km SE of Akutan, Alaska, logged at 22:43 UTC. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 22:42:18 UTC | 4.5mb | 8 km ESE of Riosucio, Colombia 7.421°, -77.042° | 37.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 earthquake was recorded 8 km ESE of Riosucio, Colombia on October 1, 2023 at 22:42 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 22:20:35 UTC | 2.0ml | 8 km NW of Point MacKenzie, Alaska 61.405°, -150.099° | 27.5 km | - | - | - | ✓ Reviewed | USGS → |
On October 1, 2023 at 22:20 UTC, a magnitude 2.0 earthquake struck 8 km NW of Point MacKenzie, Alaska. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 22:13:08 UTC | 4.4mwr | 52 km WNW of San Antonio de los Cobres, Argentina -24.013°, -66.781° | 198.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.4 earthquake 52 km WNW of San Antonio de los Cobres, Argentina with origin time 22:13 UTC on October 1, 2023. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 22:11:10 UTC | 2.8ml | 83 km SSE of Akutan, Alaska 53.446°, -165.277° | 32.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.8 earthquake 83 km SSE of Akutan, Alaska came in on October 1, 2023 at 22:11 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 22:08:36 UTC | 3.2ml | 34 km NNW of Valdez, Alaska 61.398°, -146.655° | 3.9 km | 4 | - | - | ✓ Reviewed | USGS → |
On October 1, 2023, worldwide seismic activity registered a magnitude 3.2 earthquake 34 km NNW of Valdez, Alaska at 22:08 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 21:20:57 UTC | 4.4mb | Izu Islands, Japan region 29.689°, 139.992° | 9.9 km | - | - | - | ✓ Reviewed | USGS → |
On October 1, 2023, worldwide seismic activity registered a magnitude 4.4 earthquake in the Izu Islands, Japan region at 21:20 UTC. Coming 1 hours after a magnitude 4.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 20:55:06 UTC | 2.0ml | 16 km WNW of Seldovia Village, Alaska 59.551°, -151.898° | 69.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 16 km WNW of Seldovia Village, Alaska on October 1, 2023 at 20:55 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 20:53:16 UTC | 2.4md | 8 km SE of Maria Antonia, Puerto Rico 17.915°, -66.845° | 12.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 seismic event took place 8 km SE of Maria Antonia, Puerto Rico on October 1, 2023 at 20:53 UTC. Coming 12 hours after a magnitude 3.3 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 20:13:09 UTC | 2.8ml | 16 km SE of Wright, Wyoming 43.641°, -105.360° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.8 seismic event took place 16 km SE of Wright, Wyoming on October 1, 2023 at 20:13 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.2 earthquake that occurred about 2 hours earlier. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 20:08:38 UTC | 4.3mb | 273 km WNW of Houma, Tonga -20.276°, -177.753° | 507.1 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.3 event was detected 273 km WNW of Houma, Tonga on October 1, 2023, with origin time 20:08 UTC. 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. | ||||||||
2023-10-01 2023-10-01 20:00:34 UTC | 4.5mb | Izu Islands, Japan region 29.612°, 140.082° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.5 earthquake in the Izu Islands, Japan region with origin time 20:00 UTC on October 1, 2023. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 19:57:11 UTC | 2.1ml | 4 km WSW of Healy, Alaska 63.843°, -149.057° | 103.9 km | - | - | - | ✓ Reviewed | USGS → |
On October 1, 2023 at 19:57 UTC, a magnitude 2.1 earthquake struck 4 km WSW of Healy, Alaska. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 19:53:48 UTC | 4.3mb | Izu Islands, Japan region 30.874°, 141.935° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.3 earthquake in the Izu Islands, Japan region came in on October 1, 2023 at 19:53 UTC. It arrived roughly 16 hours after a larger magnitude 4.5 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 19:47:41 UTC | 2.9ml(texnet) | 7 km NE of Hermleigh, Texas 32.683°, -100.696° | 6.5 km | - | - | - | ✓ Reviewed | USGS → |
On October 1, 2023 at 19:47 UTC, a magnitude 2.9 earthquake struck 7 km NE of Hermleigh, Texas. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 19:29:36 UTC | 3.6mw | 4 km S of Petrolia, CA 40.291°, -124.290° | 9.6 km | 4 | III | - | ✓ Reviewed | USGS → |
On October 1, 2023, worldwide seismic activity registered a magnitude 3.6 earthquake 4 km S of Petrolia, CA at 19:29 UTC. It arrived roughly 4 hours after a larger magnitude 4.1 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 19:25:33 UTC | 2.5md | 11 km SSE of Maria Antonia, Puerto Rico 17.882°, -66.849° | 11.7 km | - | - | - | ✓ Reviewed | USGS → |
On October 1, 2023 at 19:25 UTC, a magnitude 2.5 earthquake struck 11 km SSE of Maria Antonia, Puerto Rico. It arrived roughly 11 hours after a larger magnitude 3.3 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 19:25:31 UTC | 4.3mb | Izu Islands, Japan region 29.680°, 139.944° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 seismic event took place in the Izu Islands, Japan region on October 1, 2023 at 19:25 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.5 earthquake that occurred about 1 hours earlier. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-01 2023-10-01 19:23:09 UTC | 3.3ml | 69 km SSE of Adak, Alaska 51.332°, -176.124° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.3 seismic event took place 69 km SSE of Adak, Alaska on October 1, 2023 at 19:23 UTC. See the M3.3 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 October 1, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.