Earthquakes on December 18, 2021
322
EARTHQUAKES on December 18, 2021
24-hour UTC period · USGS data
LARGEST: M6.0 — Prince Edward Islands region
10 km deep
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
6
M4.0–4.9
47
M3.0–3.9
11
M2.0–2.9
64
M1.0–1.9
194
Activity Summary
322
Total earthquakes
~250
Daily average
Elevated
Activity level
6
M5.0+ events
Geographic Breakdown
Top Countries (International)
Significant Earthquakes (M4.5+)
6.0
Prince Edward Islands region
20:05 UTC · 10.0 km deep
5.4
northern Qinghai, China
23:54 UTC · 10.0 km deep
5.2
Near the north coast of Papua, Indonesia
18:25 UTC · 10.0 km deep
5.1
227 km SSE of Isangel, Vanuatu
20:14 UTC · 10.0 km deep
Felt by 4
5.1
67 km SE of ‘Ohonua, Tonga
01:12 UTC · 10.0 km deep
5.0
23 km ESE of Kýthira, Greece
05:16 UTC · 63.5 km deep
Felt by 12
4.9
85 km W of Haveluloto, Tonga
18:36 UTC · 181.9 km deep
4.9
85 km NE of Sorong, Indonesia
18:28 UTC · 10.0 km deep
Earthquake Map — December 18, 2021
All Earthquakes — December 18, 2021
Showing 30 of 128 (filtered from 322)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-12-18 2021-12-18 23:54:27 UTC | 5.4mb | northern Qinghai, China 38.921°, 92.619° | 10.0 km | - | VI | green | ✓ Reviewed | USGS → |
A magnitude 5.4 earthquake was recorded near northern Qinghai, China on December 18, 2021 at 23:54 UTC. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M5.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 23:36:58 UTC | 4.1mb | 5 km SW of Sorong, Indonesia -0.909°, 131.223° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On December 18, 2021, worldwide seismic activity registered a magnitude 4.1 earthquake 5 km SW of Sorong, Indonesia at 23:36 UTC. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 22:15:56 UTC | 4.1mb | 11 km SSW of Puerto El Triunfo, El Salvador 13.184°, -88.592° | 103.5 km | - | - | - | ✓ Reviewed | USGS → |
At 22:15 UTC on December 18, 2021, a magnitude 4.1 tremor occurred 11 km SSW of Puerto El Triunfo, El Salvador. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 22:05:10 UTC | 2.2md | 5 km SSW of P?hala, Hawaii 19.154°, -155.497° | 36.7 km | - | - | - | Auto | USGS → |
On December 18, 2021, worldwide seismic activity registered a magnitude 2.2 earthquake 5 km SSW of P?hala, Hawaii at 22:05 UTC. Coming 22 hours after a magnitude 3.3 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. | ||||||||
2021-12-18 2021-12-18 22:04:50 UTC | 4.7ml | 19 km ENE of Pedro Bay, Alaska 59.859°, -153.798° | 163.0 km | 104 | II | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.7 earthquake 19 km ENE of Pedro Bay, Alaska at 22:04 UTC on December 18, 2021. A tsunami evaluation was automatically initiated given the magnitude and location. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 22:03:04 UTC | 2.0ml | 17 km SW of Tyonek, Alaska 60.952°, -151.353° | 83.7 km | 15 | - | - | ✓ Reviewed | USGS → |
On December 18, 2021, worldwide seismic activity registered a magnitude 2.0 earthquake 17 km SW of Tyonek, Alaska at 22:03 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 21:47:52 UTC | 3.9mb | Maug Islands region, Northern Mariana Islands 19.012°, 145.664° | 189.9 km | - | - | - | ✓ Reviewed | USGS → |
On December 18, 2021, worldwide seismic activity registered a magnitude 3.9 earthquake in the Maug Islands region, Northern Mariana Islands at 21:47 UTC. See the M3.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 21:46:23 UTC | 2.4ml | 44 km NW of Toyah, Texas 31.616°, -104.101° | 7.0 km | - | - | - | ✓ Reviewed | USGS → |
On December 18, 2021 at 21:46 UTC, a magnitude 2.4 earthquake struck 44 km NW of Toyah, Texas. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 21:29:48 UTC | 3.3ml | Rat Islands, Aleutian Islands, Alaska 51.395°, 178.788° | 41.2 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.3 earthquake near Rat Islands, Aleutian Islands, Alaska came in on December 18, 2021 at 21:29 UTC. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 21:18:10 UTC | 2.0ml | south of the Aleutian Islands 52.898°, -165.673° | 20.0 km | - | - | - | ✓ Reviewed | USGS → |
At 21:18 UTC on December 18, 2021, a magnitude 2.0 tremor occurred south of the Aleutian Islands. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 21:12:15 UTC | 2.6ml | 35 km S of Silver Gate, Montana 44.690°, -110.002° | 15.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.6 earthquake was recorded 35 km S of Silver Gate, Montana on December 18, 2021 at 21:12 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 21:05:59 UTC | 4.5mb | Flores Sea -7.936°, 119.721° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.5 event was detected near Flores Sea on December 18, 2021, with origin time 21:05 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 21:02:32 UTC | 4.1mb | 158 km N of Las Khorey, Somalia 12.590°, 48.076° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.1 earthquake 158 km N of Las Khorey, Somalia at 21:02 UTC on December 18, 2021. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 21:01:59 UTC | 2.3ml | 6 km ENE of P?hala, Hawaii 19.224°, -155.420° | 31.0 km | - | - | - | Auto | USGS → |
The USGS recorded this magnitude 2.3 earthquake 6 km ENE of P?hala, Hawaii at 21:01 UTC on December 18, 2021. Coming 21 hours after a magnitude 3.3 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. | ||||||||
2021-12-18 2021-12-18 20:51:37 UTC | 2.2ml | 70 km NNE of White Mountain, Alaska 65.291°, -162.979° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.2 earthquake 70 km NNE of White Mountain, Alaska at 20:51 UTC on December 18, 2021. It arrived roughly 2 hours after a larger magnitude 3.4 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. | ||||||||
2021-12-18 2021-12-18 20:27:32 UTC | 4.7mb | 71 km NNE of Maumere, Indonesia -7.987°, 122.341° | 13.5 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.7 event was detected 71 km NNE of Maumere, Indonesia on December 18, 2021, with origin time 20:27 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 20:14:16 UTC | 5.1mww | 227 km SSE of Isangel, Vanuatu -21.436°, 170.133° | 10.0 km | 4 | - | - | ✓ Reviewed | USGS → |
On December 18, 2021, worldwide seismic activity registered a magnitude 5.1 earthquake 227 km SSE of Isangel, Vanuatu at 20:14 UTC. See the M5.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 20:10:54 UTC | 4.8mb | 150 km E of ‘Ohonua, Tonga -21.289°, -173.502° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On December 18, 2021 at 20:10 UTC, a magnitude 4.8 earthquake struck 150 km E of ‘Ohonua, Tonga. The event was offshore. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 20:05:45 UTC | 6.0mww | Prince Edward Islands region -47.126°, 33.508° | 10.0 km | - | - | green | ✓ Reviewed | USGS → |
On December 18, 2021 at 20:05 UTC, a magnitude 6.0 earthquake struck in the Prince Edward Islands region. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. It is the largest earthquake currently listed for worldwide seismic activity on December 18, 2021. See the M6.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 20:02:49 UTC | 4.0mb | 96 km E of Yujing, Taiwan 23.007°, 121.394° | 21.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.0 seismic event took place 96 km E of Yujing, Taiwan on December 18, 2021 at 20:02 UTC. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 20:02:21 UTC | 2.2md | 10km ESE of Willits, CA 39.370°, -123.255° | 7.0 km | 1 | - | - | ✓ Reviewed | USGS → |
At 20:02 UTC on December 18, 2021, a magnitude 2.2 tremor occurred 10km ESE of Willits, CA. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 19:52:02 UTC | 2.2ml | 1 km S of P?hala, Hawaii 19.187°, -155.481° | 31.4 km | 1 | - | - | Auto | USGS → |
Seismographs logged a magnitude 2.2 earthquake 1 km S of P?hala, Hawaii with origin time 19:52 UTC on December 18, 2021. This event falls inside the aftershock decay of a nearby magnitude 3.3 earthquake that occurred about 19 hours earlier. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 19:46:05 UTC | 4.8mb | west of Macquarie Island -57.268°, 147.471° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.8 earthquake was recorded west of Macquarie Island on December 18, 2021 at 19:46 UTC. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 19:40:33 UTC | 4.0mb | 33 km NE of Chabahar, Iran 25.505°, 60.874° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
December 18, 2021 brought a magnitude 4.0 earthquake 33 km NE of Chabahar, Iran, logged at 19:40 UTC. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 19:19:17 UTC | 4.0mb | 31 km ESE of Ozernovskiy, Russia 51.403°, 156.927° | 140.8 km | - | - | - | ✓ Reviewed | USGS → |
On December 18, 2021 at 19:19 UTC, a magnitude 4.0 earthquake struck 31 km ESE of Ozernovskiy, Russia. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 19:16:20 UTC | 2.9ml | 2km N of Yucaipa, CA 34.047°, -117.045° | 11.2 km | 37 | II | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.9 earthquake 2km N of Yucaipa, CA at 19:16 UTC on December 18, 2021. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 19:16:13 UTC | 3.4ml | 72 km NNE of White Mountain, Alaska 65.304°, -162.933° | 10.7 km | - | IV | - | ✓ Reviewed | USGS → |
This magnitude 3.4 event was detected 72 km NNE of White Mountain, Alaska on December 18, 2021, with origin time 19:16 UTC. In the 72 hours after this event, the USGS recorded 7 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 19:14:04 UTC | 2.1ml | 69 km SW of Kaktovik, Alaska 69.636°, -144.735° | 23.2 km | - | - | - | ✓ Reviewed | USGS → |
At 19:14 UTC on December 18, 2021, a magnitude 2.1 tremor occurred 69 km SW of Kaktovik, Alaska. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 19:11:24 UTC | 2.6ml | 13 km SSW of Leilani Estates, Hawaii 19.367°, -154.988° | 7.4 km | 2 | - | - | ✓ Reviewed | USGS → |
On December 18, 2021 at 19:11 UTC, a magnitude 2.6 earthquake struck 13 km SSW of Leilani Estates, Hawaii. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-12-18 2021-12-18 19:06:09 UTC | 4.6mb | 26 km ENE of Sorong, Indonesia -0.804°, 131.482° | 37.4 km | - | - | - | ✓ Reviewed | USGS → |
On December 18, 2021 at 19:06 UTC, a magnitude 4.6 earthquake struck 26 km ENE of Sorong, Indonesia. Coming 1 hours after a magnitude 5.2 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.6 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 18, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.