Earthquakes on October 18, 2023
245
EARTHQUAKES on October 18, 2023
24-hour UTC period · USGS data
LARGEST: M5.5 — Pacific-Antarctic Ridge
10 km deep · 2 people felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
3
M4.0–4.9
32
M3.0–3.9
17
M2.0–2.9
48
M1.0–1.9
145
Activity Summary
245
Total earthquakes
~250
Daily average
Normal
Activity level
3
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.5
Pacific-Antarctic Ridge
10:29 UTC · 10.0 km deep
Felt by 2
5.2
151 km E of Yigo Village, Guam
08:11 UTC · 10.0 km deep
Felt by 1
5.1
Izu Islands, Japan region
22:15 UTC · 25.3 km deep
4.9
134 km SSE of Lata, Solomon Islands
16:49 UTC · 161.9 km deep
4.9
125 km ESE of Neiafu, Tonga
13:30 UTC · 10.0 km deep
4.9
144 km E of Kokopo, Papua New Guinea
07:49 UTC · 108.2 km deep
4.7
Easter Island region
21:52 UTC · 10.0 km deep
4.6
central East Pacific Rise
20:01 UTC · 10.0 km deep
Earthquake Map — October 18, 2023
All Earthquakes — October 18, 2023
Showing 30 of 100 (filtered from 245)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-10-18 2023-10-18 23:48:05 UTC | 2.0ml | 68 km NNE of White Mountain, Alaska 65.231°, -162.753° | 12.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 68 km NNE of White Mountain, Alaska on October 18, 2023 at 23:48 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 23:47:16 UTC | 2.1md | 9 km E of Pāhala, Hawaii 19.208°, -155.388° | 30.5 km | - | - | - | Auto | USGS → |
Seismographs logged a magnitude 2.1 earthquake 9 km E of Pāhala, Hawaii with origin time 23:47 UTC on October 18, 2023. This event falls inside the aftershock decay of a nearby magnitude 2.6 earthquake that occurred about 5 hours earlier. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 23:35:16 UTC | 2.5md | Puerto Rico region 18.029°, -66.842° | 16.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 seismic event took place in the Puerto Rico region on October 18, 2023 at 23:35 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 23:16:53 UTC | 2.9ml | 139 km SE of Akutan, Alaska 53.282°, -164.228° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.9 earthquake 139 km SE of Akutan, Alaska with origin time 23:16 UTC on October 18, 2023. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 22:47:23 UTC | 3.8ml | 9 km SE of Ramón Santana, Dominican Republic 18.490°, -69.103° | 148.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.8 seismic event took place 9 km SE of Ramón Santana, Dominican Republic on October 18, 2023 at 22:47 UTC. The event was offshore. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 22:15:06 UTC | 5.1mww | Izu Islands, Japan region 30.827°, 141.369° | 25.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 5.1 earthquake in the Izu Islands, Japan region with origin time 22:15 UTC on October 18, 2023. See the M5.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 22:02:33 UTC | 3.5ml | 22 km NW of Ninilchik, Alaska 60.172°, -152.003° | 68.4 km | 3 | II | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.5 earthquake 22 km NW of Ninilchik, Alaska with origin time 22:02 UTC on October 18, 2023. The event was offshore. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 21:52:04 UTC | 4.7mb | Easter Island region -23.065°, -113.916° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.7 event was detected in the Easter Island region on October 18, 2023, with origin time 21:52 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 21:32:06 UTC | 4.4mb | 31 km S of Karakenja, Tajikistan 38.951°, 71.571° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 21:32 UTC on October 18, 2023, a magnitude 4.4 tremor occurred 31 km S of Karakenja, Tajikistan. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 21:30:20 UTC | 4.2mb | 80 km NNW of Hihifo, Tonga -15.248°, -173.957° | 61.1 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.2 earthquake 80 km NNW of Hihifo, Tonga at 21:30 UTC on October 18, 2023. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 21:15:05 UTC | 4.3mb | 9 km NW of Carhuamayo, Peru -10.847°, -76.085° | 101.8 km | - | - | - | ✓ Reviewed | USGS → |
On October 18, 2023 at 21:15 UTC, a magnitude 4.3 earthquake struck 9 km NW of Carhuamayo, Peru. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 21:08:46 UTC | 4.0mb | 80 km N of Lae, Papua New Guinea -6.006°, 147.099° | 112.3 km | - | - | - | ✓ Reviewed | USGS → |
On October 18, 2023, worldwide seismic activity registered a magnitude 4.0 earthquake 80 km N of Lae, Papua New Guinea at 21:08 UTC. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 20:57:19 UTC | 3.2ml | 15 km E of Wright, Wyoming 43.779°, -105.301° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
At 20:57 UTC on October 18, 2023, a magnitude 3.2 tremor occurred 15 km E of Wright, Wyoming. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 20:23:50 UTC | 2.7ml | 52 km SE of Sand Point, Alaska 54.968°, -159.977° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
October 18, 2023 brought a magnitude 2.7 earthquake 52 km SE of Sand Point, Alaska, logged at 20:23 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 20:09:45 UTC | 4.2mb | Bonin Islands, Japan region 28.744°, 142.513° | 14.2 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.2 event was detected in the Bonin Islands, Japan region on October 18, 2023, with origin time 20:09 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 20:01:04 UTC | 4.6mb | central East Pacific Rise -6.339°, -106.936° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.6 earthquake near central East Pacific Rise came in on October 18, 2023 at 20:01 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 19:56:55 UTC | 4.5mb | central East Pacific Rise -6.272°, -107.043° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 earthquake was recorded near central East Pacific Rise on October 18, 2023 at 19:56 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 19:47:24 UTC | 3.0ml | 26 km NW of Stevens Village, Alaska 66.198°, -149.442° | 13.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.0 seismic event took place 26 km NW of Stevens Village, Alaska on October 18, 2023 at 19:47 UTC. The event was offshore. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 19:04:01 UTC | 3.0ml | 33 km SW of Birney, Montana 45.074°, -106.760° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
October 18, 2023 brought a magnitude 3.0 earthquake 33 km SW of Birney, Montana, logged at 19:04 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 18:59:19 UTC | 2.6ml | 3 km SSW of Pāhala, Hawaii 19.172°, -155.491° | 31.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.6 earthquake was recorded 3 km SSW of Pāhala, Hawaii on October 18, 2023 at 18:59 UTC. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 18:51:11 UTC | 2.1md | 2 km WSW of Indios, Puerto Rico 17.984°, -66.836° | 16.5 km | - | - | - | ✓ Reviewed | USGS → |
On October 18, 2023, worldwide seismic activity registered a magnitude 2.1 earthquake 2 km WSW of Indios, Puerto Rico at 18:51 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 18:44:58 UTC | 3.8md | 142 km NNE of Vieques, Puerto Rico 19.627°, -65.343° | 39.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.8 earthquake 142 km NNE of Vieques, Puerto Rico came in on October 18, 2023 at 18:44 UTC. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 18:29:42 UTC | 4.4mb | 28 km S of La Libertad, El Salvador 13.233°, -89.317° | 67.7 km | 11 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.4 earthquake 28 km S of La Libertad, El Salvador at 18:29 UTC on October 18, 2023. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 18:26:54 UTC | 3.6ml | Nevada 39.624°, -119.631° | 11.6 km | 446 | III | - | ✓ Reviewed | USGS → |
A magnitude 3.6 earthquake was recorded near Nevada on October 18, 2023 at 18:26 UTC. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 18:09:44 UTC | 4.2mb | 130 km ENE of Tual, Indonesia -5.041°, 133.770° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.2 earthquake 130 km ENE of Tual, Indonesia came in on October 18, 2023 at 18:09 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 17:55:27 UTC | 2.2ml | 102 km SE of Akutan, Alaska 53.573°, -164.548° | 24.7 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.2 earthquake 102 km SE of Akutan, Alaska at 17:55 UTC on October 18, 2023. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 17:19:51 UTC | 2.1md | 2 km WNW of East Shore, CA 40.251°, -121.095° | -0.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 2 km WNW of East Shore, CA on October 18, 2023 at 17:19 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 17:17:25 UTC | 2.3ml | southern Idaho 44.301°, -115.177° | 8.9 km | - | - | - | ✓ Reviewed | USGS → |
On October 18, 2023, worldwide seismic activity registered a magnitude 2.3 earthquake near southern Idaho at 17:17 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.4 earthquake that occurred about 8 hours earlier. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 16:50:40 UTC | 2.5ml | 5 km S of Volcano, Hawaii 19.390°, -155.244° | 1.6 km | 1 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.5 event was detected 5 km S of Volcano, Hawaii on October 18, 2023, with origin time 16:50 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-18 2023-10-18 16:49:31 UTC | 4.9mb | 134 km SSE of Lata, Solomon Islands -11.740°, 166.482° | 161.9 km | - | - | - | ✓ Reviewed | USGS → |
On October 18, 2023, worldwide seismic activity registered a magnitude 4.9 earthquake 134 km SSE of Lata, Solomon Islands at 16:49 UTC. See the M4.9 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 18, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.