Earthquakes on December 10, 2021
242
EARTHQUAKES on December 10, 2021
24-hour UTC period · USGS data
LARGEST: M5.2 — Kermadec Islands region
33 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
4
M4.0–4.9
32
M3.0–3.9
12
M2.0–2.9
58
M1.0–1.9
136
Activity Summary
242
Total earthquakes
~250
Daily average
Normal
Activity level
4
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.2
Kermadec Islands region
13:27 UTC · 33.5 km deep
5.0
South Sandwich Islands region
19:45 UTC · 68.2 km deep
5.0
63 km S of Gorontalo, Indonesia
18:39 UTC · 149.6 km deep
5.0
South Sandwich Islands region
11:11 UTC · 80.4 km deep
4.9
Kuril Islands
11:55 UTC · 51.3 km deep
4.9
South Sandwich Islands region
05:03 UTC · 101.0 km deep
4.8
129 km SSW of Lata, Solomon Islands
00:18 UTC · 10.0 km deep
4.6
104 km W of San Antonio de los Cobres, Argentina
21:21 UTC · 192.5 km deep
Earthquake Map — December 10, 2021
All Earthquakes — December 10, 2021
Showing 30 of 106 (filtered from 242)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-12-10 2021-12-10 23:29:06 UTC | 2.0ml | Rat Islands, Aleutian Islands, Alaska 52.002°, 178.268° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
On December 10, 2021 at 23:29 UTC, a magnitude 2.0 earthquake struck near Rat Islands, Aleutian Islands, Alaska. This event falls inside the aftershock decay of a nearby magnitude 4.5 earthquake that occurred about 4 hours earlier. 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. | ||||||||
2021-12-10 2021-12-10 23:23:30 UTC | 2.6md | 13 km SSE of Sunnyside, Utah 39.445°, -110.316° | -3.3 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.6 earthquake 13 km SSE of Sunnyside, Utah came in on December 10, 2021 at 23:23 UTC. This is the shallowest earthquake in the current dataset — a shallow crustal event. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 23:02:26 UTC | 2.2md | 12km S of Tres Pinos, CA 36.684°, -121.331° | 5.4 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.2 earthquake 12km S of Tres Pinos, CA came in on December 10, 2021 at 23:02 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 22:58:17 UTC | 3.3ml | 250 km SSE of Attu Station, Alaska 50.872°, 174.921° | 33.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.3 seismic event took place 250 km SSE of Attu Station, Alaska on December 10, 2021 at 22:58 UTC. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 22:19:15 UTC | 2.1ml | 22 km WNW of Stanley, Idaho 44.315°, -115.186° | 5.5 km | - | - | - | ✓ Reviewed | USGS → |
At 22:19 UTC on December 10, 2021, a magnitude 2.1 tremor occurred 22 km WNW of Stanley, Idaho. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 22:13:28 UTC | 2.1md | 8km SW of Calistoga, CA 38.532°, -122.645° | 8.4 km | - | - | - | ✓ Reviewed | USGS → |
On December 10, 2021 at 22:13 UTC, a magnitude 2.1 earthquake struck 8km SW of Calistoga, CA. It arrived roughly 6 hours after a larger magnitude 2.5 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. | ||||||||
2021-12-10 2021-12-10 22:10:20 UTC | 2.0ml | 33 km SSW of Dillon, Montana 44.929°, -112.785° | 7.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 33 km SSW of Dillon, Montana on December 10, 2021 at 22:10 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 22:10:16 UTC | 3.0ml | Rat Islands, Aleutian Islands, Alaska 51.992°, 178.218° | 7.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.0 event was detected near Rat Islands, Aleutian Islands, Alaska on December 10, 2021, with origin time 22:10 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.5 earthquake that occurred about 2 hours earlier. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 22:00:52 UTC | 2.2md | 12km N of Brooktrails, CA 39.550°, -123.380° | 7.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 12km N of Brooktrails, CA on December 10, 2021 at 22:00 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 21:55:53 UTC | 2.0ml | 41 km WSW of Petersville, Alaska 62.392°, -151.531° | 88.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 41 km WSW of Petersville, Alaska on December 10, 2021 at 21:55 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 21:31:03 UTC | 2.0ml | 52 km NNW of Karluk, Alaska 58.002°, -154.812° | 83.9 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 52 km NNW of Karluk, Alaska with origin time 21:31 UTC on December 10, 2021. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 21:21:24 UTC | 4.6mb | 104 km W of San Antonio de los Cobres, Argentina -24.105°, -67.335° | 192.5 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.6 earthquake 104 km W of San Antonio de los Cobres, Argentina came in on December 10, 2021 at 21:21 UTC. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 20:18:01 UTC | 2.3md | 3 km SSE of P?hala, Hawaii 19.170°, -155.466° | 32.8 km | - | - | - | Auto | USGS → |
On December 10, 2021 at 20:18 UTC, a magnitude 2.3 earthquake struck 3 km SSE of P?hala, Hawaii. Coming 20 hours after a magnitude 3.2 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. | ||||||||
2021-12-10 2021-12-10 20:15:58 UTC | 4.1mb | Rat Islands, Aleutian Islands, Alaska 51.914°, 178.277° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.1 earthquake near Rat Islands, Aleutian Islands, Alaska with origin time 20:15 UTC on December 10, 2021. Coming 1 hours after a magnitude 4.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 20:04:31 UTC | 2.2ml | 46 km WSW of Paxson, Alaska 62.924°, -146.450° | 249.9 km | - | - | - | Auto | USGS → |
At 20:04 UTC on December 10, 2021, a magnitude 2.2 tremor occurred 46 km WSW of Paxson, Alaska. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 19:59:36 UTC | 2.9ml | Rat Islands, Aleutian Islands, Alaska 52.022°, 178.197° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 seismic event took place near Rat Islands, Aleutian Islands, Alaska on December 10, 2021 at 19:59 UTC. It arrived roughly 1 hours after a larger magnitude 4.5 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 19:52:06 UTC | 2.0ml | Rat Islands, Aleutian Islands, Alaska 51.976°, 178.355° | 3.0 km | - | - | - | ✓ Reviewed | USGS → |
On December 10, 2021, worldwide seismic activity registered a magnitude 2.0 earthquake near Rat Islands, Aleutian Islands, Alaska at 19:52 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.5 earthquake that occurred about 1 hours earlier. 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. | ||||||||
2021-12-10 2021-12-10 19:48:00 UTC | 3.2ml | Rat Islands, Aleutian Islands, Alaska 52.099°, 178.411° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On December 10, 2021 at 19:48 UTC, a magnitude 3.2 earthquake struck near Rat Islands, Aleutian Islands, Alaska. This event falls inside the aftershock decay of a nearby magnitude 3.4 earthquake that occurred about 1 hours earlier. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 19:47:28 UTC | 3.1ml | Rat Islands, Aleutian Islands, Alaska 51.978°, 178.230° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On December 10, 2021, worldwide seismic activity registered a magnitude 3.1 earthquake near Rat Islands, Aleutian Islands, Alaska at 19:47 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.5 earthquake that occurred about 1 hours earlier. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 19:45:24 UTC | 5.0mb | South Sandwich Islands region -58.923°, -25.906° | 68.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 5.0 earthquake was recorded in the South Sandwich Islands region on December 10, 2021 at 19:45 UTC. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 19:45:17 UTC | 4.5mb | Rat Islands, Aleutian Islands, Alaska 51.919°, 178.297° | 9.8 km | - | III | - | ✓ Reviewed | USGS → |
On December 10, 2021 at 19:45 UTC, a magnitude 4.5 earthquake struck near Rat Islands, Aleutian Islands, Alaska. In the 72 hours after this event, the USGS recorded 11 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 19:45:05 UTC | 4.3mb | 240 km N of Lospalos, Timor Leste -6.388°, 127.416° | 404.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.3 earthquake 240 km N of Lospalos, Timor Leste with origin time 19:45 UTC on December 10, 2021. This is the deepest earthquake in the current dataset — a deep-focus event. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 19:43:52 UTC | 3.4ml | Rat Islands, Aleutian Islands, Alaska 51.974°, 178.214° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.4 event was detected near Rat Islands, Aleutian Islands, Alaska on December 10, 2021, with origin time 19:43 UTC. It arrived roughly 1 hours after a larger magnitude 4.2 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. | ||||||||
2021-12-10 2021-12-10 19:38:21 UTC | 2.9ml | Rat Islands, Aleutian Islands, Alaska 52.020°, 178.153° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
December 10, 2021 brought a magnitude 2.9 earthquake near Rat Islands, Aleutian Islands, Alaska, logged at 19:38 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.4 earthquake that occurred about 1 hours earlier. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 19:37:50 UTC | 2.1ml | Rat Islands, Aleutian Islands, Alaska 51.968°, 178.369° | 4.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded near Rat Islands, Aleutian Islands, Alaska on December 10, 2021 at 19:37 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.2 earthquake that occurred about 1 hours earlier. 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. | ||||||||
2021-12-10 2021-12-10 19:34:58 UTC | 2.2ml | 3 km SSW of P?hala, Hawaii 19.172°, -155.492° | 35.9 km | - | - | - | Auto | USGS → |
On December 10, 2021, worldwide seismic activity registered a magnitude 2.2 earthquake 3 km SSW of P?hala, Hawaii at 19:34 UTC. Coming 19 hours after a magnitude 3.2 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 19:31:21 UTC | 2.6ml | Rat Islands, Aleutian Islands, Alaska 51.989°, 178.252° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.6 earthquake near Rat Islands, Aleutian Islands, Alaska with origin time 19:31 UTC on December 10, 2021. Coming 1 hours after a magnitude 4.2 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 19:28:48 UTC | 2.5ml | Rat Islands, Aleutian Islands, Alaska 51.965°, 178.225° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 seismic event took place near Rat Islands, Aleutian Islands, Alaska on December 10, 2021 at 19:28 UTC. Coming 1 hours after a magnitude 4.2 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. | ||||||||
2021-12-10 2021-12-10 19:28:06 UTC | 2.6ml | Rat Islands, Aleutian Islands, Alaska 51.977°, 178.273° | 6.8 km | - | - | - | ✓ Reviewed | USGS → |
On December 10, 2021, worldwide seismic activity registered a magnitude 2.6 earthquake near Rat Islands, Aleutian Islands, Alaska at 19:28 UTC. It arrived roughly 1 hours after a larger magnitude 4.2 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-10 2021-12-10 19:26:25 UTC | 4.2mb | Rat Islands, Aleutian Islands, Alaska 51.853°, 178.312° | 9.5 km | - | III | - | ✓ Reviewed | USGS → |
This magnitude 4.2 event was detected near Rat Islands, Aleutian Islands, Alaska on December 10, 2021, with origin time 19:26 UTC. In the 72 hours after this event, the USGS recorded 14 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M4.2 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 December 10, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.