Earthquakes on October 31, 2023
290
EARTHQUAKES on October 31, 2023
24-hour UTC period · USGS data
LARGEST: M6.6 — 80 km WSW of Vallenar, Chile
34 km deep · 71 people felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
6
M4.0–4.9
40
M3.0–3.9
10
M2.0–2.9
50
M1.0–1.9
184
Activity Summary
290
Total earthquakes
~250
Daily average
Normal
Activity level
6
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
6.6
80 km WSW of Vallenar, Chile
12:33 UTC · 34.0 km deep
Felt by 71
6.5
185 km ENE of Levuka, Fiji
11:10 UTC · 560.0 km deep
Felt by 1
5.1
southeast of the Loyalty Islands
22:04 UTC · 10.0 km deep
5.1
109 km SSE of Bīrjand, Iran
09:13 UTC · 10.0 km deep
5.1
220 km NW of Fais, Micronesia
01:11 UTC · 10.0 km deep
5.0
South Sandwich Islands region
00:11 UTC · 10.0 km deep
4.9
Mariana Islands region
20:26 UTC · 10.0 km deep
4.9
125 km ESE of Madang, Papua New Guinea
17:58 UTC · 10.0 km deep
Earthquake Map — October 31, 2023
All Earthquakes — October 31, 2023
Showing 30 of 106 (filtered from 290)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-10-31 2023-10-31 23:34:47 UTC | 2.9ml | 3 km N of Point Possession, Alaska 60.955°, -150.690° | 53.4 km | 7 | I | - | ✓ Reviewed | USGS → |
This magnitude 2.9 event was detected 3 km N of Point Possession, Alaska on October 31, 2023, with origin time 23:34 UTC. Coming 1 hours after a magnitude 4.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 23:33:39 UTC | 2.7ml | 2 km NNE of Point Possession, Alaska 60.938°, -150.668° | 47.0 km | - | - | - | ✓ Reviewed | USGS → |
October 31, 2023 brought a magnitude 2.7 earthquake 2 km NNE of Point Possession, Alaska, logged at 23:33 UTC. Coming 1 hours after a magnitude 4.0 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. | ||||||||
2023-10-31 2023-10-31 23:12:35 UTC | 4.0ml | 3 km NNE of Point Possession, Alaska 60.953°, -150.662° | 44.9 km | 249 | II | green | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.0 earthquake 3 km NNE of Point Possession, Alaska with origin time 23:12 UTC on October 31, 2023. A tsunami evaluation was automatically initiated given the magnitude and location. 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 M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 22:40:38 UTC | 2.1md | 3 km WNW of Fuig, Puerto Rico 17.995°, -66.951° | 15.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 3 km WNW of Fuig, Puerto Rico on October 31, 2023 at 22:40 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 22:38:03 UTC | 2.7ml | 250 km W of Adak, Alaska 51.913°, 179.730° | 165.9 km | - | - | - | ✓ Reviewed | USGS → |
On October 31, 2023 at 22:38 UTC, a magnitude 2.7 earthquake struck 250 km W of Adak, Alaska. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 22:34:01 UTC | 4.8mww | 14 km SW of Gobō, Japan 33.787°, 135.056° | 40.0 km | 3 | - | - | ✓ Reviewed | USGS → |
A magnitude 4.8 earthquake was recorded 14 km SW of Gobō, Japan on October 31, 2023 at 22:34 UTC. The event was offshore. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 22:26:21 UTC | 4.1mb | 90 km SSE of Murghob, Tajikistan 37.482°, 74.523° | 68.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.1 seismic event took place 90 km SSE of Murghob, Tajikistan on October 31, 2023 at 22:26 UTC. Coming 3 hours after a magnitude 4.4 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 22:26:08 UTC | 4.2mb | 24 km WNW of Herāt, Afghanistan 34.471°, 61.977° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.2 earthquake 24 km WNW of Herāt, Afghanistan with origin time 22:26 UTC on October 31, 2023. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 22:25:57 UTC | 2.4md | 1 km E of Magas Arriba, Puerto Rico 18.015°, -66.754° | 17.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 seismic event took place 1 km E of Magas Arriba, Puerto Rico on October 31, 2023 at 22:25 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 22:13:49 UTC | 4.5mb | 4 km N of Maca, Peru -15.604°, -71.769° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.5 earthquake 4 km N of Maca, Peru came in on October 31, 2023 at 22:13 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 22:13:34 UTC | 2.3ml | 76 km SW of Nikolski, Alaska 52.389°, -169.532° | 36.8 km | - | - | - | ✓ Reviewed | USGS → |
On October 31, 2023 at 22:13 UTC, a magnitude 2.3 earthquake struck 76 km SW of Nikolski, Alaska. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 22:07:43 UTC | 2.3ml | 18 km WNW of Stanley, Idaho 44.258°, -115.168° | 9.5 km | - | - | - | ✓ Reviewed | USGS → |
At 22:07 UTC on October 31, 2023, a magnitude 2.3 tremor occurred 18 km WNW of Stanley, Idaho. It arrived roughly 8 hours after a larger magnitude 2.6 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. | ||||||||
2023-10-31 2023-10-31 22:04:43 UTC | 5.1mww | southeast of the Loyalty Islands -21.263°, 171.496° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 5.1 earthquake southeast of the Loyalty Islands with origin time 22:04 UTC on October 31, 2023. See the M5.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 21:52:22 UTC | 2.0ml | 59 km SE of Atka, Alaska 51.818°, -173.596° | 23.5 km | - | - | - | ✓ Reviewed | USGS → |
October 31, 2023 brought a magnitude 2.0 earthquake 59 km SE of Atka, Alaska, logged at 21:52 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 21:42:01 UTC | 2.1ml | 13 km SSW of Bombay Beach, CA 33.246°, -115.796° | 6.3 km | 2 | - | - | ✓ Reviewed | USGS → |
On October 31, 2023, worldwide seismic activity registered a magnitude 2.1 earthquake 13 km SSW of Bombay Beach, CA at 21:42 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 21:24:50 UTC | 2.5mb_lg | 7 km ESE of Linden, Indiana 40.175°, -86.823° | 6.1 km | - | - | - | ✓ Reviewed | USGS → |
October 31, 2023 brought a magnitude 2.5 earthquake 7 km ESE of Linden, Indiana, logged at 21:24 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 21:09:29 UTC | 2.4ml | 20 km N of Twin Bridges, Montana 45.730°, -112.310° | 3.5 km | - | - | - | ✓ Reviewed | USGS → |
On October 31, 2023, worldwide seismic activity registered a magnitude 2.4 earthquake 20 km N of Twin Bridges, Montana at 21:09 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 20:36:53 UTC | 4.1mb | 281 km W of Banda Aceh, Indonesia 5.380°, 92.800° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
October 31, 2023 brought a magnitude 4.1 earthquake 281 km W of Banda Aceh, Indonesia, logged at 20:36 UTC. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 20:31:21 UTC | 3.4ml | 25 km SE of Wright, Wyoming 43.574°, -105.290° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
October 31, 2023 brought a magnitude 3.4 earthquake 25 km SE of Wright, Wyoming, logged at 20:31 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 20:29:41 UTC | 4.3mb | 73 km WNW of San Antonio de los Cobres, Argentina -24.062°, -67.026° | 215.6 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.3 event was detected 73 km WNW of San Antonio de los Cobres, Argentina on October 31, 2023, with origin time 20:29 UTC. Coming 10 hours after a magnitude 4.4 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 20:26:15 UTC | 4.9mb | Mariana Islands region 20.075°, 147.687° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.9 event was detected in the Mariana Islands region on October 31, 2023, with origin time 20:26 UTC. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 20:07:09 UTC | 3.3ml | 14 km ESE of Wright, Wyoming 43.712°, -105.326° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
On October 31, 2023 at 20:07 UTC, a magnitude 3.3 earthquake struck 14 km ESE of Wright, Wyoming. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 19:57:49 UTC | 2.0ml | 69 km NNE of Karluk, Alaska 58.164°, -154.131° | 75.0 km | - | - | - | ✓ Reviewed | USGS → |
On October 31, 2023 at 19:57 UTC, a magnitude 2.0 earthquake struck 69 km NNE of Karluk, Alaska. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 19:56:12 UTC | 4.4mb | 107 km SE of Murghob, Tajikistan 37.410°, 74.722° | 11.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.4 earthquake 107 km SE of Murghob, Tajikistan with origin time 19:56 UTC on October 31, 2023. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 19:54:27 UTC | 4.1mb | 99 km SE of Murghob, Tajikistan 37.454°, 74.650° | 12.7 km | - | - | - | ✓ Reviewed | USGS → |
On October 31, 2023 at 19:54 UTC, a magnitude 4.1 earthquake struck 99 km SE of Murghob, Tajikistan. This event falls inside the aftershock decay of a nearby magnitude 4.3 earthquake that occurred about 19 hours earlier. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 19:38:39 UTC | 4.2mb | 140 km NNW of Asan-Maina Village, Guam 14.655°, 144.255° | 11.3 km | - | - | - | ✓ Reviewed | USGS → |
On October 31, 2023, worldwide seismic activity registered a magnitude 4.2 earthquake 140 km NNW of Asan-Maina Village, Guam at 19:38 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 19:23:19 UTC | 2.7ml | 35 km SE of Akutan, Alaska 53.887°, -165.424° | 99.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.7 earthquake was recorded 35 km SE of Akutan, Alaska on October 31, 2023 at 19:23 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 19:04:18 UTC | 2.5ml | 13 km NE of Walker, California 38.591°, -119.349° | 7.7 km | - | - | - | ✓ Reviewed | USGS → |
On October 31, 2023 at 19:04 UTC, a magnitude 2.5 earthquake struck 13 km NE of Walker, California. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 18:43:56 UTC | 4.2mb | 83 km S of Panguna, Papua New Guinea -7.069°, 155.578° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
At 18:43 UTC on October 31, 2023, a magnitude 4.2 tremor occurred 83 km S of Panguna, Papua New Guinea. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-31 2023-10-31 18:40:04 UTC | 2.7ml | 52 km NE of Cold Bay, Alaska 55.524°, -162.155° | 140.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.7 earthquake 52 km NE of Cold Bay, Alaska with origin time 18:40 UTC on October 31, 2023. The event was offshore. See the M2.7 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 31, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.