Earthquakes on October 27, 2023
325
EARTHQUAKES on October 27, 2023
24-hour UTC period · USGS data
LARGEST: M5.6 — 123 km N of Neiafu, Tonga
35 km deep
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
2
M4.0–4.9
39
M3.0–3.9
8
M2.0–2.9
65
M1.0–1.9
211
Activity Summary
325
Total earthquakes
~250
Daily average
Elevated
Activity level
2
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
5.6
123 km N of Neiafu, Tonga
03:02 UTC · 35.0 km deep
5.0
18 km WNW of Waingapu, Indonesia
07:49 UTC · 76.2 km deep
Felt by 2
4.9
161 km WNW of Tobelo, Indonesia
10:05 UTC · 35.0 km deep
4.9
100 km NNE of Ozernovskiy, Russia
08:53 UTC · 138.2 km deep
4.8
68 km E of Tuensang, India
23:23 UTC · 80.0 km deep
4.8
10 km ESE of Santa María Chimalapa, Mexico
18:39 UTC · 115.6 km deep
Felt by 3
4.8
Prince Edward Islands region
12:14 UTC · 10.0 km deep
Felt by 1
4.7
Kermadec Islands region
20:04 UTC · 18.3 km deep
Earthquake Map — October 27, 2023
All Earthquakes — October 27, 2023
Showing 30 of 114 (filtered from 325)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-10-27 2023-10-27 23:54:38 UTC | 2.1ml | 20 km NNW of Eureka Roadhouse, Alaska 62.113°, -147.302° | 14.8 km | - | - | - | ✓ Reviewed | USGS → |
On October 27, 2023, worldwide seismic activity registered a magnitude 2.1 earthquake 20 km NNW of Eureka Roadhouse, Alaska at 23:54 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 23:53:18 UTC | 2.4ml | 22 km SW of Covenant Life, Alaska 59.262°, -136.279° | 2.9 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.4 event was detected 22 km SW of Covenant Life, Alaska on October 27, 2023, with origin time 23:53 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. | ||||||||
2023-10-27 2023-10-27 23:39:48 UTC | 2.6ml | 5 km NNW of Naches, Washington 46.780°, -120.717° | 11.2 km | 25 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.6 event was detected 5 km NNW of Naches, Washington on October 27, 2023, with origin time 23:39 UTC. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 23:34:07 UTC | 4.2mb | 66 km SSW of Gorontalo, Indonesia -0.043°, 122.895° | 152.7 km | - | - | - | ✓ Reviewed | USGS → |
October 27, 2023 brought a magnitude 4.2 earthquake 66 km SSW of Gorontalo, Indonesia, logged at 23:34 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 23:28:27 UTC | 3.0ml | 45 km ENE of Pedro Bay, Alaska 59.891°, -153.317° | 126.9 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.0 event was detected 45 km ENE of Pedro Bay, Alaska on October 27, 2023, with origin time 23:28 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 23:23:47 UTC | 4.8mb | 68 km E of Tuensang, India 26.248°, 95.509° | 80.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:23 UTC on October 27, 2023, a magnitude 4.8 tremor occurred 68 km E of Tuensang, India. The event was offshore. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 23:10:45 UTC | 3.0ml | 128 km NNW of Ambler, Alaska 68.192°, -158.691° | 5.1 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.0 earthquake 128 km NNW of Ambler, Alaska came in on October 27, 2023 at 23:10 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 22:59:07 UTC | 4.4mb | 113 km NNE of Bangkalan, Indonesia -6.114°, 113.163° | 565.2 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.4 earthquake 113 km NNE of Bangkalan, Indonesia came in on October 27, 2023 at 22:59 UTC. This is the deepest earthquake in the current dataset — a deep-focus event. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 22:29:11 UTC | 2.9ml | Rat Islands, Aleutian Islands, Alaska 51.474°, 178.440° | 58.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 earthquake was recorded near Rat Islands, Aleutian Islands, Alaska on October 27, 2023 at 22:29 UTC. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 22:11:02 UTC | 2.2ml | 17 km SSW of Volcano, Hawaii 19.294°, -155.281° | 30.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 17 km SSW of Volcano, Hawaii on October 27, 2023 at 22:11 UTC. It arrived roughly 7 hours after a larger magnitude 3.7 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 22:08:52 UTC | 4.1mb | Fiji region -20.133°, -178.065° | 535.6 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.1 earthquake in the Fiji region at 22:08 UTC on October 27, 2023. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 21:50:30 UTC | 4.6mb | 176 km ESE of Modisi, Indonesia -0.147°, 125.903° | 76.5 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.6 earthquake 176 km ESE of Modisi, Indonesia with origin time 21:50 UTC on October 27, 2023. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 21:26:44 UTC | 2.0ml | 4 km SW of Port Ludlow, Washington 47.888°, -122.721° | -0.0 km | 1 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 4 km SW of Port Ludlow, Washington with origin time 21:26 UTC on October 27, 2023. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 21:23:25 UTC | 2.4ml | 36 km NE of Pedro Bay, Alaska 59.981°, -153.571° | 139.6 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.4 earthquake 36 km NE of Pedro Bay, Alaska came in on October 27, 2023 at 21:23 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 21:20:52 UTC | 2.1ml | 41 km SE of Denali National Park, Alaska 63.271°, -151.149° | 10.5 km | - | - | - | ✓ Reviewed | USGS → |
At 21:20 UTC on October 27, 2023, a magnitude 2.1 tremor occurred 41 km SE of Denali National Park, Alaska. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 21:00:50 UTC | 2.0ml | 13 km WSW of Ludlow, CA 34.680°, -116.289° | 1.7 km | - | - | - | ✓ Reviewed | USGS → |
At 21:00 UTC on October 27, 2023, a magnitude 2.0 tremor occurred 13 km WSW of Ludlow, CA. Coming 1 hours after a magnitude 2.6 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 20:47:54 UTC | 2.3ml | 22 km NW of Stanley, Idaho 44.344°, -115.164° | 18.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 earthquake was recorded 22 km NW of Stanley, Idaho on October 27, 2023 at 20:47 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 20:40:45 UTC | 2.1ml | Andreanof Islands, Aleutian Islands, Alaska 51.131°, -179.140° | 19.1 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.1 earthquake near Andreanof Islands, Aleutian Islands, Alaska at 20:40 UTC on October 27, 2023. Coming 15 hours after a magnitude 2.7 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 20:33:36 UTC | 2.9md | 7 km WNW of The Geysers, CA 38.800°, -122.828° | 2.3 km | 39 | - | - | ✓ Reviewed | USGS → |
On October 27, 2023 at 20:33 UTC, a magnitude 2.9 earthquake struck 7 km WNW of The Geysers, CA. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 20:04:14 UTC | 4.7mb | Kermadec Islands region -31.288°, -177.646° | 18.3 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.7 earthquake in the Kermadec Islands region came in on October 27, 2023 at 20:04 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 19:50:01 UTC | 2.1ml | 77 km SE of Adak, Alaska 51.477°, -175.715° | 38.9 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 77 km SE of Adak, Alaska on October 27, 2023, with origin time 19:50 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 19:47:16 UTC | 4.2mb | Kuril Islands 46.580°, 153.385° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On October 27, 2023 at 19:47 UTC, a magnitude 4.2 earthquake struck near Kuril Islands. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 19:45:38 UTC | 2.6ml | 12 km WSW of Ludlow, CA 34.687°, -116.284° | 2.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.6 seismic event took place 12 km WSW of Ludlow, CA on October 27, 2023 at 19:45 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. | ||||||||
2023-10-27 2023-10-27 19:41:13 UTC | 3.2md | Puerto Rico region 18.173°, -66.628° | 127.1 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.2 earthquake in the Puerto Rico region at 19:41 UTC on October 27, 2023. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 19:14:18 UTC | 2.0md | 2 km S of Pāhala, Hawaii 19.185°, -155.478° | 33.0 km | - | - | - | Auto | USGS → |
This magnitude 2.0 event was detected 2 km S of Pāhala, Hawaii on October 27, 2023, with origin time 19:14 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.7 earthquake that occurred about 4 hours earlier. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 19:13:34 UTC | 4.4mb | 30 km S of Jurm, Afghanistan 36.595°, 70.874° | 211.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 seismic event took place 30 km S of Jurm, Afghanistan on October 27, 2023 at 19:13 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 19:12:39 UTC | 4.3mb | 106 km W of Baa, Indonesia -10.578°, 122.083° | 12.1 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.3 earthquake 106 km W of Baa, Indonesia at 19:12 UTC on October 27, 2023. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 18:56:24 UTC | 2.5ml | 14 km NNW of Aragon, New Mexico 34.004°, -108.596° | 10.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 earthquake was recorded 14 km NNW of Aragon, New Mexico on October 27, 2023 at 18:56 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 18:43:55 UTC | 2.5md | 3 km SE of Jauca, Puerto Rico 17.943°, -66.341° | 7.7 km | - | - | - | ✓ Reviewed | USGS → |
On October 27, 2023 at 18:43 UTC, a magnitude 2.5 earthquake struck 3 km SE of Jauca, Puerto Rico. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-27 2023-10-27 18:39:31 UTC | 4.8mb | 10 km ESE of Santa María Chimalapa, Mexico 16.878°, -94.585° | 115.6 km | 3 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.8 earthquake 10 km ESE of Santa María Chimalapa, Mexico at 18:39 UTC on October 27, 2023. See the M4.8 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 27, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.