Earthquakes on December 31, 2021
235
EARTHQUAKES on December 31, 2021
24-hour UTC period · USGS data
LARGEST: M5.0 — 122 km NNE of Palu, Indonesia
107 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
4
M4.0–4.9
34
M3.0–3.9
7
M2.0–2.9
47
M1.0–1.9
143
Activity Summary
235
Total earthquakes
~250
Daily average
Normal
Activity level
4
M5.0+ events
Geographic Breakdown
Top Countries (International)
Significant Earthquakes (M4.5+)
5.0
122 km NNE of Palu, Indonesia
05:53 UTC · 106.8 km deep
5.0
198 km SSW of Lajes das Flores, Portugal
00:58 UTC · 10.0 km deep
5.0
256 km ESE of Tadine, New Caledonia
00:50 UTC · 10.0 km deep
5.0
254 km ESE of Tadine, New Caledonia
00:50 UTC · 10.0 km deep
4.9
109 km W of Hihifo, Tonga
16:56 UTC · 284.3 km deep
4.7
128 km NNE of Ba, Fiji
20:29 UTC · 10.0 km deep
4.7
73 km NNW of Phôngsali, Laos
14:53 UTC · 10.4 km deep
4.6
Pulau Pulau Tanimbar, Indonesia
20:51 UTC · 10.0 km deep
Earthquake Map — December 31, 2021
All Earthquakes — December 31, 2021
Showing 30 of 92 (filtered from 235)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-12-31 2021-12-31 23:47:57 UTC | 2.5ml | 30 km E of Pedro Bay, Alaska 59.810°, -153.564° | 129.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 seismic event took place 30 km E of Pedro Bay, Alaska on December 31, 2021 at 23:47 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 23:20:44 UTC | 2.1ml | 2km NNW of Palomar Observatory, CA 33.371°, -116.874° | 5.3 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.1 earthquake 2km NNW of Palomar Observatory, CA at 23:20 UTC on December 31, 2021. It arrived roughly 14 hours after a larger magnitude 3.0 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 23:10:35 UTC | 3.4mb | 24 km S of False Pass, Alaska 54.632°, -163.376° | 20.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.4 earthquake was recorded 24 km S of False Pass, Alaska on December 31, 2021 at 23:10 UTC. The event was offshore. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 23:10:23 UTC | 2.1ml | 90 km WSW of Adak, Alaska 51.478°, -177.778° | 39.2 km | - | - | - | ✓ Reviewed | USGS → |
December 31, 2021 brought a magnitude 2.1 earthquake 90 km WSW of Adak, Alaska, logged at 23:10 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 22:56:50 UTC | 2.7ml | 59 km S of Whites City, New Mexico 31.640°, -104.404° | 6.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.7 seismic event took place 59 km S of Whites City, New Mexico on December 31, 2021 at 22:56 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 22:41:35 UTC | 2.6ml | 10 km S of Kapaau, Hawaii 20.137°, -155.804° | 22.1 km | 2 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.6 earthquake 10 km S of Kapaau, Hawaii at 22:41 UTC on December 31, 2021. This event falls inside the aftershock decay of a nearby magnitude 2.8 earthquake that occurred about 1 hours earlier. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 22:32:17 UTC | 4.3mb | 35 km SW of Methóni, Greece 36.592°, 21.423° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On December 31, 2021, worldwide seismic activity registered a magnitude 4.3 earthquake 35 km SW of Methóni, Greece at 22:32 UTC. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 22:32:00 UTC | 2.8ml | 11 km S of Kapaau, Hawaii 20.127°, -155.800° | 21.1 km | 4 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.8 earthquake 11 km S of Kapaau, Hawaii came in on December 31, 2021 at 22:32 UTC. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 21:56:42 UTC | 2.2ml | 62 km SE of Denali National Park, Alaska 63.178°, -150.768° | 130.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 62 km SE of Denali National Park, Alaska on December 31, 2021 at 21:56 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 21:54:32 UTC | 4.1mb | 59 km N of Khand?d, Afghanistan 37.485°, 72.241° | 189.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.1 earthquake was recorded 59 km N of Khand?d, Afghanistan on December 31, 2021 at 21:54 UTC. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 21:45:56 UTC | 2.7ml | 77 km SSW of Adak, Alaska 51.221°, -177.017° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
December 31, 2021 brought a magnitude 2.7 earthquake 77 km SSW of Adak, Alaska, logged at 21:45 UTC. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 21:45:21 UTC | 2.2ml | 43 km ENE of Pedro Bay, Alaska 59.911°, -153.364° | 135.7 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.2 earthquake 43 km ENE of Pedro Bay, Alaska with origin time 21:45 UTC on December 31, 2021. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 21:35:47 UTC | 2.3md | 12km SSW of Ferndale, CA 40.477°, -124.320° | 18.6 km | - | - | - | ✓ Reviewed | USGS → |
December 31, 2021 brought a magnitude 2.3 earthquake 12km SSW of Ferndale, CA, logged at 21:35 UTC. It arrived roughly 1 hours after a larger magnitude 3.8 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 21:24:28 UTC | 2.6md | 12km SSW of Ferndale, CA 40.477°, -124.323° | 19.6 km | 4 | - | - | ✓ Reviewed | USGS → |
At 21:24 UTC on December 31, 2021, a magnitude 2.6 tremor occurred 12km SSW of Ferndale, CA. It arrived roughly 1 hours after a larger magnitude 3.8 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. | ||||||||
2021-12-31 2021-12-31 21:20:11 UTC | 2.4md | 5 km S of P?hala, Hawaii 19.158°, -155.484° | 35.2 km | - | - | - | Auto | USGS → |
The USGS recorded this magnitude 2.4 earthquake 5 km S of P?hala, Hawaii at 21:20 UTC on December 31, 2021. Coming 2 hours after a magnitude 2.5 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. | ||||||||
2021-12-31 2021-12-31 21:01:34 UTC | 2.0md | 12km SSW of Ferndale, CA 40.481°, -124.329° | 18.5 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 12km SSW of Ferndale, CA on December 31, 2021, with origin time 21:01 UTC. Coming 1 hours after a magnitude 3.8 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. | ||||||||
2021-12-31 2021-12-31 20:57:46 UTC | 3.8mw | 12km SSW of Ferndale, CA 40.478°, -124.329° | 19.1 km | 161 | III | - | ✓ Reviewed | USGS → |
A magnitude 3.8 seismic event took place 12km SSW of Ferndale, CA on December 31, 2021 at 20:57 UTC. 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 M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 20:51:07 UTC | 4.6mb | Pulau Pulau Tanimbar, Indonesia -8.474°, 130.629° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.6 earthquake near Pulau Pulau Tanimbar, Indonesia came in on December 31, 2021 at 20:51 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 20:41:00 UTC | 4.3mb | south of the Fiji Islands -23.426°, -179.706° | 552.1 km | - | - | - | ✓ Reviewed | USGS → |
At 20:41 UTC on December 31, 2021, a magnitude 4.3 tremor occurred south of the Fiji Islands. 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. | ||||||||
2021-12-31 2021-12-31 20:29:42 UTC | 4.7mb | 128 km NNE of Ba, Fiji -16.434°, 178.067° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.7 earthquake 128 km NNE of Ba, Fiji at 20:29 UTC on December 31, 2021. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 19:57:28 UTC | 4.1mb | 93 km NNE of Iquique, Chile -19.392°, -69.953° | 73.5 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.1 earthquake 93 km NNE of Iquique, Chile with origin time 19:57 UTC on December 31, 2021. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 19:35:54 UTC | 3.1ml | 30 km WSW of Birney, Montana 45.169°, -106.841° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
On December 31, 2021, worldwide seismic activity registered a magnitude 3.1 earthquake 30 km WSW of Birney, Montana at 19:35 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. | ||||||||
2021-12-31 2021-12-31 19:32:44 UTC | 2.5ml | 5 km ENE of P?hala, Hawaii 19.223°, -155.426° | 33.3 km | - | - | - | Auto | USGS → |
A magnitude 2.5 earthquake was recorded 5 km ENE of P?hala, Hawaii on December 31, 2021 at 19:32 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 19:27:58 UTC | 3.4ml | 3km SW of Redlands, CA 34.035°, -117.208° | 14.4 km | 509 | III | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.4 earthquake 3km SW of Redlands, CA with origin time 19:27 UTC on December 31, 2021. The event was offshore. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 19:26:03 UTC | 4.5mb | 193 km ESE of Kokopo, Papua New Guinea -5.240°, 153.764° | 57.2 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.5 earthquake 193 km ESE of Kokopo, Papua New Guinea at 19:26 UTC on December 31, 2021. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 19:08:31 UTC | 2.5md | 12km SSW of Ferndale, CA 40.477°, -124.320° | 19.4 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.5 earthquake 12km SSW of Ferndale, CA came in on December 31, 2021 at 19:08 UTC. In the 72 hours after this event, the USGS recorded 4 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 19:07:23 UTC | 4.2mb | 216 km NE of Maumere, Indonesia -7.333°, 123.695° | 518.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.2 seismic event took place 216 km NE of Maumere, Indonesia on December 31, 2021 at 19:07 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 18:17:37 UTC | 4.6mb | 30 km ESE of Santiago, Philippines 7.201°, 126.838° | 50.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.6 seismic event took place 30 km ESE of Santiago, Philippines on December 31, 2021 at 18:17 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 17:54:19 UTC | 4.1mb | 28 km S of Matapalo, Peru -3.940°, -80.222° | 67.8 km | - | - | - | ✓ Reviewed | USGS → |
On December 31, 2021, worldwide seismic activity registered a magnitude 4.1 earthquake 28 km S of Matapalo, Peru at 17:54 UTC. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-31 2021-12-31 17:30:25 UTC | 4.1mb | 151 km W of Haveluloto, Tonga -20.915°, -176.653° | 430.3 km | - | - | - | ✓ Reviewed | USGS → |
At 17:30 UTC on December 31, 2021, a magnitude 4.1 tremor occurred 151 km W of Haveluloto, Tonga. 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. | ||||||||
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 31, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.