Earthquakes on October 8, 2021
326
EARTHQUAKES on October 8, 2021
24-hour UTC period · USGS data
61 km deep · 6 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
6
M4.0–4.9
36
M3.0–3.9
9
M2.0–2.9
64
M1.0–1.9
211
Activity Summary
326
Total earthquakes
~250
Daily average
Elevated
Activity level
6
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
5.2
82 km WNW of Meulaboh, Indonesia
10:04 UTC · 61.1 km deep
Felt by 6
5.1
59 km NE of Masjed Soleym?n, Iran
23:16 UTC · 10.0 km deep
Felt by 3
5.1
South Sandwich Islands region
21:39 UTC · 20.4 km deep
5.0
South Sandwich Islands region
22:55 UTC · 10.0 km deep
5.0
South Sandwich Islands region
03:12 UTC · 10.0 km deep
5.0
Southwest Indian Ridge
00:09 UTC · 10.0 km deep
4.9
187 km ESE of Kimbe, Papua New Guinea
13:24 UTC · 10.0 km deep
4.8
13 km SE of Esperanza, Puerto Rico
18:28 UTC · 11.0 km deep
Felt by 241
Earthquake Map — October 8, 2021
All Earthquakes — October 8, 2021
Showing 30 of 115 (filtered from 326)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-10-08 2021-10-08 23:53:31 UTC | 4.3mb | 277 km SE of Hotan, China 35.609°, 82.407° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 seismic event took place 277 km SE of Hotan, China on October 8, 2021 at 23:53 UTC. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 23:25:17 UTC | 2.1md | 29km SSW of Smith Valley, NV 38.532°, -119.409° | 2.5 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.1 earthquake 29km SSW of Smith Valley, NV at 23:25 UTC on October 8, 2021. It arrived roughly 22 hours after a larger magnitude 2.4 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. | ||||||||
2021-10-08 2021-10-08 23:16:26 UTC | 5.1mb | 59 km NE of Masjed Soleym?n, Iran 32.338°, 49.728° | 10.0 km | 3 | - | - | ✓ Reviewed | USGS → |
A magnitude 5.1 earthquake was recorded 59 km NE of Masjed Soleym?n, Iran on October 8, 2021 at 23:16 UTC. The event was offshore. See the M5.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 23:14:25 UTC | 4.0mb | 7 km E of Uñon, Peru -15.732°, -72.358° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.0 earthquake was recorded 7 km E of Uñon, Peru on October 8, 2021 at 23:14 UTC. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 23:07:40 UTC | 2.6ml | 2 km ESE of Luther, Oklahoma 35.654°, -97.170° | 6.9 km | 3 | - | - | ✓ Reviewed | USGS → |
At 23:07 UTC on October 8, 2021, a magnitude 2.6 tremor occurred 2 km ESE of Luther, Oklahoma. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 23:07:38 UTC | 3.7md | 93 km NNW of San Antonio, Puerto Rico 19.310°, -67.322° | 26.0 km | - | - | - | ✓ Reviewed | USGS → |
On October 8, 2021, worldwide seismic activity registered a magnitude 3.7 earthquake 93 km NNW of San Antonio, Puerto Rico at 23:07 UTC. See the M3.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 22:58:41 UTC | 2.4ml | 121 km SSE of Sand Point, Alaska 54.340°, -159.740° | 15.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 earthquake was recorded 121 km SSE of Sand Point, Alaska on October 8, 2021 at 22:58 UTC. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 22:55:34 UTC | 5.0mb | South Sandwich Islands region -60.184°, -24.303° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On October 8, 2021, worldwide seismic activity registered a magnitude 5.0 earthquake in the South Sandwich Islands region at 22:55 UTC. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 22:39:39 UTC | 2.0ml | 82 km NNW of Arctic Village, Alaska 68.793°, -146.413° | 14.4 km | - | - | - | ✓ Reviewed | USGS → |
October 8, 2021 brought a magnitude 2.0 earthquake 82 km NNW of Arctic Village, Alaska, logged at 22:39 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.9 earthquake that occurred about 1 hours earlier. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 22:04:12 UTC | 4.2mb | 241 km ENE of Lospalos, Timor Leste -7.396°, 128.877° | 124.7 km | - | - | - | ✓ Reviewed | USGS → |
On October 8, 2021, worldwide seismic activity registered a magnitude 4.2 earthquake 241 km ENE of Lospalos, Timor Leste at 22:04 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 21:53:42 UTC | 4.6mb | South Sandwich Islands region -56.551°, -25.358° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.6 earthquake in the South Sandwich Islands region with origin time 21:53 UTC on October 8, 2021. It arrived roughly 1 hours after a larger magnitude 5.1 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 21:46:35 UTC | 2.9ml | 79 km NNW of Arctic Village, Alaska 68.791°, -146.272° | 10.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.9 earthquake 79 km NNW of Arctic Village, Alaska with origin time 21:46 UTC on October 8, 2021. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 21:39:26 UTC | 5.1mb | South Sandwich Islands region -56.586°, -25.660° | 20.4 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 5.1 earthquake in the South Sandwich Islands region with origin time 21:39 UTC on October 8, 2021. See the M5.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 21:39:05 UTC | 2.1md | 7km SSE of Pine Hills, CA 40.675°, -124.120° | 24.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 7km SSE of Pine Hills, CA on October 8, 2021 at 21:39 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 21:10:06 UTC | 2.2ml | 240 km WSW of Yakutat, Alaska 58.683°, -143.576° | 10.9 km | - | - | - | ✓ Reviewed | USGS → |
October 8, 2021 brought a magnitude 2.2 earthquake 240 km WSW of Yakutat, Alaska, logged at 21:10 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 20:23:00 UTC | 2.2ml | 7 km SE of Point Possession, Alaska 60.887°, -150.582° | 36.3 km | - | - | - | ✓ Reviewed | USGS → |
On October 8, 2021 at 20:23 UTC, a magnitude 2.2 earthquake struck 7 km SE of Point Possession, Alaska. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 20:22:31 UTC | 3.5md | 13 km SE of Esperanza, Puerto Rico 18.016°, -65.382° | 12.0 km | 4 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.5 earthquake 13 km SE of Esperanza, Puerto Rico at 20:22 UTC on October 8, 2021. It arrived roughly 2 hours after a larger magnitude 4.8 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 20:17:46 UTC | 4.5mb | South Sandwich Islands region -59.558°, -25.833° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
At 20:17 UTC on October 8, 2021, a magnitude 4.5 tremor occurred in the South Sandwich Islands region. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 20:11:09 UTC | 4.5mb | Pulau Pulau Tanimbar, Indonesia -7.758°, 130.249° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.5 earthquake near Pulau Pulau Tanimbar, Indonesia at 20:11 UTC on October 8, 2021. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 19:43:27 UTC | 2.2md | 6 km SSW of P?hala, Hawaii 19.152°, -155.505° | 37.3 km | - | - | - | Auto | USGS → |
Reports of a magnitude 2.2 earthquake 6 km SSW of P?hala, Hawaii came in on October 8, 2021 at 19:43 UTC. It arrived roughly 13 hours after a larger magnitude 3.5 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. | ||||||||
2021-10-08 2021-10-08 19:41:56 UTC | 4.5mb | South Sandwich Islands region -56.803°, -25.248° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.5 event was detected in the South Sandwich Islands region on October 8, 2021, with origin time 19:41 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 19:10:36 UTC | 2.5md | 9 km SW of Guánica, Puerto Rico 17.901°, -66.959° | 7.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 seismic event took place 9 km SW of Guánica, Puerto Rico on October 8, 2021 at 19:10 UTC. Coming 11 hours after a magnitude 2.6 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 19:10:09 UTC | 4.4mb | Volcano Islands, Japan region 22.304°, 144.085° | 112.8 km | - | - | - | ✓ Reviewed | USGS → |
On October 8, 2021 at 19:10 UTC, a magnitude 4.4 earthquake struck in the Volcano Islands, Japan region. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 18:28:23 UTC | 4.8ml | 13 km SE of Esperanza, Puerto Rico 18.011°, -65.387° | 11.0 km | 241 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.8 earthquake 13 km SE of Esperanza, Puerto Rico came in on October 8, 2021 at 18:28 UTC. The event was offshore. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 18:12:01 UTC | 2.4ml | 2 km NW of Renfrow, Oklahoma 36.946°, -97.675° | 5.9 km | 1 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.4 event was detected 2 km NW of Renfrow, Oklahoma on October 8, 2021, with origin time 18:12 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 18:06:13 UTC | 4.4mb | 202 km SSW of Ushuaia, Argentina -56.573°, -69.131° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded 202 km SSW of Ushuaia, Argentina on October 8, 2021 at 18:06 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 17:57:26 UTC | 2.3md | 2 km E of Magas Arriba, Puerto Rico 18.020°, -66.745° | 15.0 km | - | - | - | ✓ Reviewed | USGS → |
At 17:57 UTC on October 8, 2021, a magnitude 2.3 tremor occurred 2 km E of Magas Arriba, Puerto Rico. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 17:37:23 UTC | 2.4ml | 108 km SSW of Kaktovik, Alaska 69.231°, -144.707° | 23.8 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.4 earthquake 108 km SSW of Kaktovik, Alaska with origin time 17:37 UTC on October 8, 2021. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 17:35:48 UTC | 4.4mb | 16 km ENE of Mungaa, Tanzania -4.911°, 35.017° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.4 earthquake 16 km ENE of Mungaa, Tanzania with origin time 17:35 UTC on October 8, 2021. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-10-08 2021-10-08 17:19:06 UTC | 3.3ml | 40 km SE of Adak, Alaska 51.608°, -176.227° | 35.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.3 seismic event took place 40 km SE of Adak, Alaska on October 8, 2021 at 17:19 UTC. The event was offshore. See the M3.3 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, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.