Earthquakes on October 3, 2021
289
EARTHQUAKES on October 3, 2021
24-hour UTC period · USGS data
LARGEST: M5.3 — south of the Kermadec Islands
42 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
1
M4.0–4.9
36
M3.0–3.9
8
M2.0–2.9
66
M1.0–1.9
178
Activity Summary
289
Total earthquakes
~250
Daily average
Normal
Activity level
1
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
5.3
south of the Kermadec Islands
05:49 UTC · 41.6 km deep
4.9
84 km SSW of Masachapa, Nicaragua
21:09 UTC · 35.0 km deep
4.9
43 km NNW of Isangel, Vanuatu
09:45 UTC · 147.6 km deep
4.7
168 km SSW of Hengchun, Taiwan
13:23 UTC · 10.0 km deep
4.7
South Sandwich Islands region
07:11 UTC · 20.3 km deep
4.6
Pacific-Antarctic Ridge
22:48 UTC · 10.0 km deep
4.6
43 km S of Pondaguitan, Philippines
22:05 UTC · 139.3 km deep
4.6
103 km W of San Antonio de los Cobres, Argentina
21:31 UTC · 204.9 km deep
Earthquake Map — October 3, 2021
All Earthquakes — October 3, 2021
Showing 30 of 111 (filtered from 289)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-10-03 2021-10-03 23:22:25 UTC | 2.4ml | 3 km S of P?hala, Hawaii 19.174°, -155.478° | 35.9 km | 1 | - | - | Auto | USGS → |
Seismographs logged a magnitude 2.4 earthquake 3 km S of P?hala, Hawaii with origin time 23:22 UTC on October 3, 2021. Coming 3 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. | ||||||||
2021-10-03 2021-10-03 23:22:24 UTC | 2.1ml | 79 km SE of Chenega, Alaska 59.606°, -146.921° | 6.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:22 UTC on October 3, 2021, a magnitude 2.1 tremor occurred 79 km SE of Chenega, Alaska. It arrived roughly 1 hours after a larger magnitude 2.6 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. | ||||||||
2021-10-03 2021-10-03 22:55:33 UTC | 2.6ml | 84 km SE of Chenega, Alaska 59.551°, -146.900° | 7.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.6 earthquake was recorded 84 km SE of Chenega, Alaska on October 3, 2021 at 22:55 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 22:48:51 UTC | 4.6mb | Pacific-Antarctic Ridge -59.213°, -151.015° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.6 earthquake near Pacific-Antarctic Ridge at 22:48 UTC on October 3, 2021. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 22:37:17 UTC | 2.1md | 1 km SW of Guayanilla, Puerto Rico 18.006°, -66.803° | 13.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 1 km SW of Guayanilla, Puerto Rico on October 3, 2021 at 22:37 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 22:28:50 UTC | 3.1ml | 10 km SE of Wright, Wyoming 43.691°, -105.390° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.1 earthquake was recorded 10 km SE of Wright, Wyoming on October 3, 2021 at 22:28 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 22:20:27 UTC | 4.2mb | off the coast of Central America 12.496°, -88.378° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
October 3, 2021 brought a magnitude 4.2 earthquake near off the coast of Central America, logged at 22:20 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 22:05:50 UTC | 4.6mb | 43 km S of Pondaguitan, Philippines 5.971°, 126.106° | 139.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.6 event was detected 43 km S of Pondaguitan, Philippines on October 3, 2021, with origin time 22:05 UTC. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 21:58:01 UTC | 2.4ml | 31 km SW of Coyanosa, Texas 31.046°, -103.306° | 5.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 seismic event took place 31 km SW of Coyanosa, Texas on October 3, 2021 at 21:58 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 21:31:00 UTC | 4.6mb | 103 km W of San Antonio de los Cobres, Argentina -24.214°, -67.341° | 204.9 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.6 earthquake 103 km W of San Antonio de los Cobres, Argentina came in on October 3, 2021 at 21:31 UTC. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 21:22:25 UTC | 2.2md | 6 km SSE of P?hala, Hawaii 19.156°, -155.448° | 36.5 km | - | - | - | Auto | USGS → |
Seismographs logged a magnitude 2.2 earthquake 6 km SSE of P?hala, Hawaii with origin time 21:22 UTC on October 3, 2021. It arrived roughly 1 hours after a larger magnitude 2.8 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. | ||||||||
2021-10-03 2021-10-03 21:18:48 UTC | 4.1mb | 283 km E of Levuka, Fiji -18.500°, -178.037° | 578.4 km | - | - | - | ✓ Reviewed | USGS → |
At 21:18 UTC on October 3, 2021, a magnitude 4.1 tremor occurred 283 km E of Levuka, Fiji. This is the deepest earthquake in the current dataset — a deep-focus event. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 21:17:35 UTC | 2.1ml | 10 km S of Princeton, Canada 49.365°, -120.519° | -0.4 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.1 earthquake 10 km S of Princeton, Canada with origin time 21:17 UTC on October 3, 2021. 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. | ||||||||
2021-10-03 2021-10-03 21:09:59 UTC | 4.9mb | 84 km SSW of Masachapa, Nicaragua 11.096°, -86.848° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.9 earthquake was recorded 84 km SSW of Masachapa, Nicaragua on October 3, 2021 at 21:09 UTC. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 20:49:44 UTC | 2.0md | 1 km S of P?hala, Hawaii 19.186°, -155.475° | 33.8 km | - | - | - | Auto | USGS → |
October 3, 2021 brought a magnitude 2.0 earthquake 1 km S of P?hala, Hawaii, logged at 20:49 UTC. It arrived roughly 1 hours after a larger magnitude 2.8 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 20:45:23 UTC | 2.8ml | 9 km E of P?hala, Hawaii 19.208°, -155.392° | 32.8 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.8 earthquake 9 km E of P?hala, Hawaii at 20:45 UTC on October 3, 2021. In the 72 hours after this event, the USGS recorded 5 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 20:27:49 UTC | 2.0md | 19km NE of Alum Rock, CA 37.498°, -121.688° | 5.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 19km NE of Alum Rock, CA on October 3, 2021 at 20:27 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 20:26:44 UTC | 4.6mb | central Mid-Atlantic Ridge 7.577°, -37.417° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.6 seismic event took place near central Mid-Atlantic Ridge on October 3, 2021 at 20:26 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 20:10:01 UTC | 2.6ml | 51 km S of Whites City, New Mexico 31.717°, -104.279° | 6.8 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.6 earthquake 51 km S of Whites City, New Mexico with origin time 20:10 UTC on October 3, 2021. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 19:47:34 UTC | 2.0ml | 51 km W of Mentone, Texas 31.700°, -104.145° | 6.2 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 51 km W of Mentone, Texas with origin time 19:47 UTC on October 3, 2021. It arrived roughly 18 hours after a larger magnitude 4.0 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 19:44:34 UTC | 4.4mb | 181 km SE of Gorontalo, Indonesia -0.404°, 124.394° | 77.4 km | - | - | - | ✓ Reviewed | USGS → |
On October 3, 2021 at 19:44 UTC, a magnitude 4.4 earthquake struck 181 km SE of Gorontalo, Indonesia. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 19:42:39 UTC | 2.0ml | 119 km ESE of Akutan, Alaska 53.790°, -164.058° | 20.3 km | - | - | - | ✓ Reviewed | USGS → |
On October 3, 2021, worldwide seismic activity registered a magnitude 2.0 earthquake 119 km ESE of Akutan, Alaska at 19:42 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 19:19:07 UTC | 2.7ml | 33 km S of Wright, Wyoming 43.456°, -105.441° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.7 earthquake 33 km S of Wright, Wyoming came in on October 3, 2021 at 19:19 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 19:16:26 UTC | 2.1ml | 91 km SE of Nikolski, Alaska 52.316°, -167.990° | 25.6 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.1 earthquake 91 km SE of Nikolski, Alaska at 19:16 UTC on October 3, 2021. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 18:44:01 UTC | 4.4mb | 165 km NNE of Nagqu, China 32.763°, 92.944° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded 165 km NNE of Nagqu, China on October 3, 2021 at 18:44 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 18:35:24 UTC | 2.1ml | 68 km S of Kokhanok, Alaska 58.837°, -154.548° | 120.1 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 68 km S of Kokhanok, Alaska on October 3, 2021, with origin time 18:35 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 18:33:50 UTC | 4.5mb | 19 km W of Laylay, Philippines 13.440°, 121.637° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.5 event was detected 19 km W of Laylay, Philippines on October 3, 2021, with origin time 18:33 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 18:33:31 UTC | 2.5md | Island of Hawaii, Hawaii 19.149°, -155.449° | 32.7 km | - | - | - | Auto | USGS → |
On October 3, 2021, worldwide seismic activity registered a magnitude 2.5 earthquake near Island of Hawaii, Hawaii at 18:33 UTC. Coming 6 hours after a magnitude 2.7 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 18:26:22 UTC | 2.4ml | 54 km NW of Toyah, Texas 31.604°, -104.260° | 6.4 km | - | - | - | ✓ Reviewed | USGS → |
October 3, 2021 brought a magnitude 2.4 earthquake 54 km NW of Toyah, Texas, logged at 18:26 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-03 2021-10-03 17:46:38 UTC | 2.2ml | 18 km NNE of Stanley, Idaho 44.377°, -114.857° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On October 3, 2021, worldwide seismic activity registered a magnitude 2.2 earthquake 18 km NNE of Stanley, Idaho at 17:46 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.8 earthquake that occurred about 16 hours earlier. See the M2.2 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 3, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.