Earthquakes on October 23, 2020
401
EARTHQUAKES on October 23, 2020
24-hour UTC period · USGS data
LARGEST: M6.1 — south of the Fiji Islands
454 km deep
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
7
M4.0–4.9
22
M3.0–3.9
43
M2.0–2.9
133
M1.0–1.9
196
Activity Summary
401
Total earthquakes
~250
Daily average
Elevated
Activity level
7
M5.0+ events
Significant Earthquakes (M4.5+)
6.1
south of the Fiji Islands
07:04 UTC · 454.0 km deep
5.9
West Chile Rise
01:46 UTC · 10.0 km deep
5.4
northern Mid-Atlantic Ridge
00:33 UTC · 10.0 km deep
5.2
7 km NE of Port-Olry, Vanuatu
19:00 UTC · 108.5 km deep
Felt by 2
5.0
21 km NW of Londres, Argentina
16:29 UTC · 123.4 km deep
5.0
South Shetland Islands
16:06 UTC · 10.0 km deep
5.0
northern Mid-Atlantic Ridge
02:19 UTC · 10.0 km deep
4.7
West Chile Rise
06:30 UTC · 10.0 km deep
Earthquake Map — October 23, 2020
All Earthquakes — October 23, 2020
Showing 30 of 205 (filtered from 401)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2020-10-23 2020-10-23 23:42:13 UTC | 2.0ml | 13 km ENE of Fox, Alaska 65.001°, -147.355° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 13 km ENE of Fox, Alaska on October 23, 2020 at 23:42 UTC. 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. | ||||||||
2020-10-23 2020-10-23 23:34:38 UTC | 3.0md | 2 km S of Magas Arriba, Puerto Rico 17.993°, -66.764° | 11.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.0 earthquake 2 km S of Magas Arriba, Puerto Rico with origin time 23:34 UTC on October 23, 2020. It arrived roughly 15 hours after a larger magnitude 3.2 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 23:20:55 UTC | 2.1ml | 71 km WNW of Happy Valley, Alaska 60.143°, -152.950° | 115.9 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 71 km WNW of Happy Valley, Alaska on October 23, 2020, with origin time 23:20 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 23:10:33 UTC | 2.3ml | 22 km WNW of Stanley, Idaho 44.309°, -115.189° | 10.5 km | - | - | - | ✓ Reviewed | USGS → |
On October 23, 2020 at 23:10 UTC, a magnitude 2.3 earthquake struck 22 km WNW of Stanley, Idaho. Coming 15 hours after a magnitude 2.4 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 23:08:54 UTC | 4.6mb | 52 km NNW of Madang, Papua New Guinea -4.811°, 145.552° | 49.0 km | - | - | - | ✓ Reviewed | USGS → |
October 23, 2020 brought a magnitude 4.6 earthquake 52 km NNW of Madang, Papua New Guinea, logged at 23:08 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 23:05:30 UTC | 4.3mb | 47 km WSW of Challapata, Bolivia -18.998°, -67.213° | 264.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 seismic event took place 47 km WSW of Challapata, Bolivia on October 23, 2020 at 23:05 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 22:53:00 UTC | 4.6mb | South Sandwich Islands region -59.722°, -26.198° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
On October 23, 2020 at 22:53 UTC, a magnitude 4.6 earthquake struck in the South Sandwich Islands region. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 22:51:46 UTC | 4.1mb | South Sandwich Islands region -59.733°, -26.063° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.1 event was detected in the South Sandwich Islands region on October 23, 2020, with origin time 22:51 UTC. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 22:50:53 UTC | 3.2ml | 111 km E of Chignik, Alaska 56.308°, -156.609° | 43.6 km | - | - | - | ✓ Reviewed | USGS → |
On October 23, 2020 at 22:50 UTC, a magnitude 3.2 earthquake struck 111 km E of Chignik, Alaska. The event was offshore. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 22:17:31 UTC | 2.0ml | 22km NW of Ludlow, CA 34.861°, -116.339° | 5.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 22km NW of Ludlow, CA with origin time 22:17 UTC on October 23, 2020. This event falls inside the aftershock decay of a nearby magnitude 2.5 earthquake that occurred about 7 hours earlier. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 21:53:50 UTC | 2.0md | 6 km SSE of Indios, Puerto Rico 17.936°, -66.802° | 8.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.0 earthquake 6 km SSE of Indios, Puerto Rico came in on October 23, 2020 at 21:53 UTC. Coming 14 hours after a magnitude 3.2 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 20:42:13 UTC | 2.4ml | 72 km SE of Halibut Cove, Alaska 59.065°, -150.476° | 13.6 km | - | - | - | ✓ Reviewed | USGS → |
October 23, 2020 brought a magnitude 2.4 earthquake 72 km SE of Halibut Cove, Alaska, logged at 20:42 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 20:36:31 UTC | 3.4ml | 117 km SSE of Sand Point, Alaska 54.397°, -159.671° | 14.7 km | - | - | - | ✓ Reviewed | USGS → |
October 23, 2020 brought a magnitude 3.4 earthquake 117 km SSE of Sand Point, Alaska, logged at 20:36 UTC. It arrived roughly 10 hours after a larger magnitude 4.6 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 20:27:19 UTC | 2.2ml | 22 km NW of Anchor Point, Alaska 59.892°, -152.155° | 66.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 22 km NW of Anchor Point, Alaska on October 23, 2020 at 20:27 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 20:13:16 UTC | 3.3ml | 128 km SSE of Sand Point, Alaska 54.301°, -159.599° | 20.1 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.3 event was detected 128 km SSE of Sand Point, Alaska on October 23, 2020, with origin time 20:13 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.3 earthquake that occurred about 13 hours earlier. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 20:01:16 UTC | 2.1ml | 34 km NW of Beluga, Alaska 61.361°, -151.540° | 70.3 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.1 earthquake 34 km NW of Beluga, Alaska came in on October 23, 2020 at 20:01 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 19:50:22 UTC | 3.1ml | 122 km SSE of Sand Point, Alaska 54.314°, -159.805° | 19.8 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.1 earthquake 122 km SSE of Sand Point, Alaska at 19:50 UTC on October 23, 2020. This event falls inside the aftershock decay of a nearby magnitude 3.9 earthquake that occurred about 19 hours earlier. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 19:28:46 UTC | 2.7md | 3 km SW of Indios, Puerto Rico 17.968°, -66.843° | 15.0 km | - | - | - | ✓ Reviewed | USGS → |
At 19:28 UTC on October 23, 2020, a magnitude 2.7 tremor occurred 3 km SW of Indios, Puerto Rico. Coming 11 hours after a magnitude 3.2 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 19:19:33 UTC | 4.4mb | 10 km ENE of Port-Olry, Vanuatu -14.994°, 167.155° | 102.5 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.4 event was detected 10 km ENE of Port-Olry, Vanuatu on October 23, 2020, with origin time 19:19 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.2 earthquake that occurred about 1 hours earlier. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 19:11:28 UTC | 4.6mb | south of the Fiji Islands -22.461°, -179.445° | 566.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.6 earthquake was recorded south of the Fiji Islands on October 23, 2020 at 19:11 UTC. This is the deepest earthquake in the current dataset — a deep-focus event. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 19:00:45 UTC | 5.2mww | 7 km NE of Port-Olry, Vanuatu -14.988°, 167.120° | 108.5 km | 2 | - | - | ✓ Reviewed | USGS → |
On October 23, 2020, worldwide seismic activity registered a magnitude 5.2 earthquake 7 km NE of Port-Olry, Vanuatu at 19:00 UTC. The event was offshore. See the M5.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 18:21:18 UTC | 4.2mb | 11 km ESE of Nueva Concepción, Guatemala 14.152°, -91.201° | 73.4 km | 5 | - | - | ✓ Reviewed | USGS → |
At 18:21 UTC on October 23, 2020, a magnitude 4.2 tremor occurred 11 km ESE of Nueva Concepción, Guatemala. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 18:07:25 UTC | 3.5ml | 18 km ENE of Wright, Wyoming 43.822°, -105.284° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.5 earthquake 18 km ENE of Wright, Wyoming at 18:07 UTC on October 23, 2020. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 17:07:00 UTC | 2.5md | 8 km ESE of La Parguera, Puerto Rico 17.937°, -66.981° | 9.0 km | - | - | - | ✓ Reviewed | USGS → |
October 23, 2020 brought a magnitude 2.5 earthquake 8 km ESE of La Parguera, Puerto Rico, logged at 17:07 UTC. It arrived roughly 9 hours after a larger magnitude 3.2 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. | ||||||||
2020-10-23 2020-10-23 16:53:19 UTC | 2.0ml | 21 km ESE of Packwood, Washington 46.532°, -121.407° | 0.1 km | 1 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.0 earthquake 21 km ESE of Packwood, Washington at 16:53 UTC on October 23, 2020. 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. | ||||||||
2020-10-23 2020-10-23 16:49:30 UTC | 3.1ml | 103 km SSE of Sand Point, Alaska 54.510°, -159.751° | 24.4 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.1 event was detected 103 km SSE of Sand Point, Alaska on October 23, 2020, with origin time 16:49 UTC. Coming 6 hours after a magnitude 4.6 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 16:49:30 UTC | 2.1md | 2 km SSW of Indios, Puerto Rico 17.970°, -66.831° | 16.0 km | - | - | - | ✓ Reviewed | USGS → |
At 16:49 UTC on October 23, 2020, a magnitude 2.1 tremor occurred 2 km SSW of Indios, Puerto Rico. This event falls inside the aftershock decay of a nearby magnitude 3.2 earthquake that occurred about 9 hours earlier. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 16:33:15 UTC | 2.1ml | 9 km WSW of Volcano, Hawaii 19.423°, -155.319° | 3.0 km | - | - | - | ✓ Reviewed | USGS → |
On October 23, 2020, worldwide seismic activity registered a magnitude 2.1 earthquake 9 km WSW of Volcano, Hawaii at 16:33 UTC. It arrived roughly 5 hours after a larger magnitude 3.0 mainshock in the same 20 km area, placing it within the typical aftershock window. 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. | ||||||||
2020-10-23 2020-10-23 16:29:55 UTC | 5.0mb | 21 km NW of Londres, Argentina -27.587°, -67.297° | 123.4 km | - | - | - | ✓ Reviewed | USGS → |
At 16:29 UTC on October 23, 2020, a magnitude 5.0 tremor occurred 21 km NW of Londres, Argentina. The event was offshore. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-10-23 2020-10-23 16:22:03 UTC | 3.1ml | 101 km SSE of Sand Point, Alaska 54.541°, -159.733° | 23.4 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.1 earthquake 101 km SSE of Sand Point, Alaska came in on October 23, 2020 at 16:22 UTC. It arrived roughly 5 hours after a larger magnitude 4.6 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M3.1 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 23, 2020. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.