Earthquakes on October 8, 2023
359
EARTHQUAKES on October 8, 2023
24-hour UTC period · USGS data
LARGEST: M5.9 — Bismarck Sea
7 km deep0
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
6
M4.0–4.9
57
M3.0–3.9
11
M2.0–2.9
73
M1.0–1.9
212
Activity Summary
359
Total earthquakes
~250
Daily average
Elevated
Activity level
6
M5.0+ events
Significant Earthquakes (M4.5+)
5.9
Bismarck Sea
18:07 UTC · 7.0 km deep
05.4
Izu Islands, Japan region
21:05 UTC · 10.0 km deep
5.3
Izu Islands, Japan region
21:17 UTC · 10.0 km deep
Felt by 1
5.2
Izu Islands, Japan region
05:36 UTC · 10.0 km deep
5.0
Izu Islands, Japan region
21:13 UTC · 10.0 km deep
5.0
Izu Islands, Japan region
21:00 UTC · 10.0 km deep
4.9
Izu Islands, Japan region
21:21 UTC · 10.0 km deep
4.9
Izu Islands, Japan region
21:09 UTC · 10.0 km deep
Earthquake Map — October 8, 2023
All Earthquakes — October 8, 2023
Showing 30 of 147 (filtered from 359)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-10-08 2023-10-08 23:50:29 UTC | 2.7ml | 22 km N of Valdez, Alaska 61.334°, -146.373° | 14.6 km | 2 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.7 earthquake 22 km N of Valdez, Alaska with origin time 23:50 UTC on October 8, 2023. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 23:35:03 UTC | 4.6mb | 30 km ENE of Puerto Obaldía, Panama 8.816°, -77.188° | 20.8 km | - | - | - | ✓ Reviewed | USGS → |
October 8, 2023 brought a magnitude 4.6 earthquake 30 km ENE of Puerto Obaldía, Panama, logged at 23:35 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 23:32:20 UTC | 2.1md | 1 km SW of Pāhala, Hawaii 19.191°, -155.493° | 36.7 km | - | - | - | Auto | USGS → |
Seismographs logged a magnitude 2.1 earthquake 1 km SW of Pāhala, Hawaii with origin time 23:32 UTC on October 8, 2023. It arrived roughly 18 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 M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 23:29:59 UTC | 4.2mb | 281 km ESE of Labasa, Fiji -17.230°, -178.126° | 423.9 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.2 earthquake 281 km ESE of Labasa, Fiji with origin time 23:29 UTC on October 8, 2023. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 23:26:14 UTC | 2.1ml | 11 km NE of Pāhala, Hawaii 19.263°, -155.389° | 30.5 km | - | - | - | Auto | USGS → |
A magnitude 2.1 seismic event took place 11 km NE of Pāhala, Hawaii on October 8, 2023 at 23:26 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.4 earthquake that occurred about 18 hours earlier. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 23:02:32 UTC | 2.4ml | 38 km ESE of Naalehu, Hawaii 18.895°, -155.257° | 14.2 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.4 earthquake 38 km ESE of Naalehu, Hawaii at 23:02 UTC on October 8, 2023. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 22:49:53 UTC | 4.3mb | 40 km SE of Madang, Papua New Guinea -5.487°, 146.045° | 64.9 km | - | - | - | ✓ Reviewed | USGS → |
On October 8, 2023, worldwide seismic activity registered a magnitude 4.3 earthquake 40 km SE of Madang, Papua New Guinea at 22:49 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.6 earthquake that occurred about 17 hours earlier. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 22:43:52 UTC | 2.0ml | 60 km SSE of Sand Point, Alaska 54.871°, -160.016° | 22.6 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 60 km SSE of Sand Point, Alaska on October 8, 2023, with origin time 22:43 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 22:42:29 UTC | 4.4mb | 15 km WNW of Tashanta, Russia 49.747°, 88.986° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On October 8, 2023 at 22:42 UTC, a magnitude 4.4 earthquake struck 15 km WNW of Tashanta, Russia. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 22:41:13 UTC | 4.5mwr | 69 km WSW of Abra Pampa, Argentina -22.955°, -66.325° | 235.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.5 earthquake 69 km WSW of Abra Pampa, Argentina with origin time 22:41 UTC on October 8, 2023. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 22:22:57 UTC | 4.3mb | 67 km NE of Petropavlovsk-Kamchatsky, Russia 53.450°, 159.404° | 114.7 km | - | - | - | ✓ Reviewed | USGS → |
At 22:22 UTC on October 8, 2023, a magnitude 4.3 tremor occurred 67 km NE of Petropavlovsk-Kamchatsky, Russia. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 22:22:52 UTC | 2.3ml | 14 km SW of Volcano, Hawaii 19.338°, -155.309° | 3.2 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.3 event was detected 14 km SW of Volcano, Hawaii on October 8, 2023, with origin time 22:22 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.3 earthquake that occurred about 10 hours earlier. 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. | ||||||||
2023-10-08 2023-10-08 22:12:25 UTC | 2.1ml | 112 km SSE of Perryville, Alaska 55.063°, -158.167° | 29.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 112 km SSE of Perryville, Alaska on October 8, 2023 at 22:12 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 22:02:52 UTC | 3.0ml | 135 km S of Unalaska, Alaska 52.659°, -166.679° | 10.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.0 earthquake 135 km S of Unalaska, Alaska with origin time 22:02 UTC on October 8, 2023. The event was offshore. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 21:57:56 UTC | 2.1ml | 42 km ENE of Maneadero, B.C., MX 31.862°, -116.160° | 18.4 km | - | - | - | ✓ Reviewed | USGS → |
On October 8, 2023 at 21:57 UTC, a magnitude 2.1 earthquake struck 42 km ENE of Maneadero, B.C., MX. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 21:53:49 UTC | 4.4mb | Izu Islands, Japan region 30.676°, 141.885° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded in the Izu Islands, Japan region on October 8, 2023 at 21:53 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 21:40:30 UTC | 2.4md | 4 km SW of La Parguera, Puerto Rico 17.942°, -67.077° | 7.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 seismic event took place 4 km SW of La Parguera, Puerto Rico on October 8, 2023 at 21:40 UTC. Coming 12 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 M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 21:36:49 UTC | 2.2ml | 12 km S of Princeton, Canada 49.345°, -120.499° | -0.5 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.2 earthquake 12 km S of Princeton, Canada at 21:36 UTC on October 8, 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. | ||||||||
2023-10-08 2023-10-08 21:30:23 UTC | 3.9mw | 7 km NW of The Geysers, CA 38.827°, -122.804° | 1.8 km | 72 | IV | - | ✓ Reviewed | USGS → |
On October 8, 2023, worldwide seismic activity registered a magnitude 3.9 earthquake 7 km NW of The Geysers, CA at 21:30 UTC. In the 72 hours after this event, the USGS recorded 28 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M3.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 21:26:45 UTC | 4.5mb | Izu Islands, Japan region 30.005°, 140.343° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On October 8, 2023, worldwide seismic activity registered a magnitude 4.5 earthquake in the Izu Islands, Japan region at 21:26 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 21:21:41 UTC | 4.9mb | Izu Islands, Japan region 29.637°, 139.813° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.9 event was detected in the Izu Islands, Japan region on October 8, 2023, with origin time 21:21 UTC. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 21:17:28 UTC | 5.3mb | Izu Islands, Japan region 29.770°, 140.074° | 10.0 km | 1 | III | green | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 5.3 earthquake in the Izu Islands, Japan region with origin time 21:17 UTC on October 8, 2023. Coming 1 hours after a magnitude 5.4 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M5.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 21:13:45 UTC | 4.3mb | 14 km N of Sofifi, Indonesia 0.870°, 127.533° | 128.2 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.3 earthquake 14 km N of Sofifi, Indonesia at 21:13 UTC on October 8, 2023. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 21:13:27 UTC | 5.0mb | Izu Islands, Japan region 29.799°, 140.028° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 21:13 UTC on October 8, 2023, a magnitude 5.0 tremor occurred in the Izu Islands, Japan region. This event falls inside the aftershock decay of a nearby magnitude 5.4 earthquake that occurred about 1 hours earlier. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 21:12:43 UTC | 2.8ml | 93 km W of Adak, Alaska 51.964°, -177.984° | 201.8 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.8 earthquake 93 km W of Adak, Alaska came in on October 8, 2023 at 21:12 UTC. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 21:09:16 UTC | 4.9mb | Izu Islands, Japan region 29.831°, 140.114° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.9 earthquake in the Izu Islands, Japan region came in on October 8, 2023 at 21:09 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.4 earthquake that occurred about 1 hours earlier. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 21:05:32 UTC | 5.4mb | Izu Islands, Japan region 29.764°, 139.966° | 10.0 km | - | III | green | ✓ Reviewed | USGS → |
A magnitude 5.4 earthquake was recorded in the Izu Islands, Japan region on October 8, 2023 at 21:05 UTC. In the 72 hours after this event, the USGS recorded 3 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M5.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 21:00:40 UTC | 5.0mb | Izu Islands, Japan region 29.742°, 140.049° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 5.0 earthquake in the Izu Islands, Japan region at 21:00 UTC on October 8, 2023. Coming 15 hours after a magnitude 5.2 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 20:56:48 UTC | 4.9mb | Izu Islands, Japan region 29.825°, 139.933° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.9 seismic event took place in the Izu Islands, Japan region on October 8, 2023 at 20:56 UTC. Coming 15 hours after a magnitude 5.2 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-08 2023-10-08 20:52:25 UTC | 2.0ml(texnet) | 56 km NW of Toyah, Texas 31.613°, -104.276° | 6.4 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.0 earthquake 56 km NW of Toyah, Texas came in on October 8, 2023 at 20:52 UTC. Coming 9 hours after a magnitude 3.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.0 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 8, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.