Earthquakes on December 20, 2023
291
EARTHQUAKES on December 20, 2023
24-hour UTC period · USGS data
LARGEST: M6.2 — 11 km E of Iray, Peru
93 km deep · 31 people felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
2
M4.0–4.9
35
M3.0–3.9
13
M2.0–2.9
59
M1.0–1.9
182
Activity Summary
291
Total earthquakes
~250
Daily average
Normal
Activity level
2
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
6.2
11 km E of Iray, Peru
12:11 UTC · 93.0 km deep
Felt by 31
5.6
South Sandwich Islands region
12:09 UTC · 109.6 km deep
4.9
South Sandwich Islands region
11:59 UTC · 51.4 km deep
4.8
Fiji region
01:00 UTC · 588.4 km deep
4.7
South Sandwich Islands region
09:57 UTC · 20.0 km deep
4.7
114 km ENE of Barcelona, Philippines
06:56 UTC · 10.0 km deep
4.7
Pagan region, Northern Mariana Islands
03:22 UTC · 35.0 km deep
4.7
134 km SW of Adak, Alaska
01:54 UTC · 24.1 km deep
Earthquake Map — December 20, 2023
All Earthquakes — December 20, 2023
Showing 30 of 109 (filtered from 291)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-12-20 2023-12-20 23:55:39 UTC | 2.6ml | 72 km ESE of King Cove, Alaska 54.725°, -161.345° | 29.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.6 event was detected 72 km ESE of King Cove, Alaska on December 20, 2023, with origin time 23:55 UTC. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 23:48:28 UTC | 3.5ml | 9 km E of Cuba, New Mexico 36.017°, -106.853° | 11.5 km | 2 | III | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.5 earthquake 9 km E of Cuba, New Mexico came in on December 20, 2023 at 23:48 UTC. The event was offshore. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 23:47:04 UTC | 2.7md | 6 km SSE of Salinas, Puerto Rico 17.924°, -66.281° | 15.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.7 seismic event took place 6 km SSE of Salinas, Puerto Rico on December 20, 2023 at 23:47 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.5 earthquake that occurred about 3 hours earlier. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 23:34:00 UTC | 3.4ml | Rat Islands, Aleutian Islands, Alaska 51.411°, 177.378° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
On December 20, 2023 at 23:34 UTC, a magnitude 3.4 earthquake struck near Rat Islands, Aleutian Islands, Alaska. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 23:21:48 UTC | 2.2ml | 12 km ESE of Pāhala, Hawaii 19.148°, -155.379° | 29.0 km | - | - | - | Auto | USGS → |
This magnitude 2.2 event was detected 12 km ESE of Pāhala, Hawaii on December 20, 2023, with origin time 23:21 UTC. Coming 7 hours after a magnitude 2.4 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. | ||||||||
2023-12-20 2023-12-20 23:05:30 UTC | 4.4mb | Kermadec Islands region -31.547°, -179.034° | 100.6 km | - | - | - | ✓ Reviewed | USGS → |
On December 20, 2023 at 23:05 UTC, a magnitude 4.4 earthquake struck in the Kermadec Islands region. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 23:00:09 UTC | 2.6md | 6 km WSW of Central Aguirre, Puerto Rico 17.924°, -66.274° | 13.8 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.6 earthquake 6 km WSW of Central Aguirre, Puerto Rico at 23:00 UTC on December 20, 2023. Coming 2 hours after a magnitude 3.5 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. | ||||||||
2023-12-20 2023-12-20 22:37:00 UTC | 4.6mwr | 69 km SSW of Intipucá, El Salvador 12.581°, -88.191° | 61.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.6 seismic event took place 69 km SSW of Intipucá, El Salvador on December 20, 2023 at 22:37 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 22:31:28 UTC | 2.1ml | 72 km ENE of Port Alsworth, Alaska 60.337°, -153.032° | 126.9 km | - | - | - | ✓ Reviewed | USGS → |
On December 20, 2023 at 22:31 UTC, a magnitude 2.1 earthquake struck 72 km ENE of Port Alsworth, Alaska. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 22:12:55 UTC | 4.0mb | northwest of the Kuril Islands 47.871°, 146.932° | 444.8 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.0 earthquake northwest of the Kuril Islands at 22:12 UTC on December 20, 2023. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 22:11:59 UTC | 3.2ml | 152 km SE of Chignik, Alaska 55.245°, -156.851° | 15.7 km | - | - | - | ✓ Reviewed | USGS → |
On December 20, 2023, worldwide seismic activity registered a magnitude 3.2 earthquake 152 km SE of Chignik, Alaska at 22:11 UTC. The event was offshore. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 22:03:47 UTC | 2.5ml | 10 km E of Cuba, New Mexico 36.022°, -106.844° | 9.5 km | 1 | - | - | ✓ Reviewed | USGS → |
December 20, 2023 brought a magnitude 2.5 earthquake 10 km E of Cuba, New Mexico, logged at 22:03 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 21:59:12 UTC | 3.0ml | 155 km S of False Pass, Alaska 53.463°, -163.635° | 27.9 km | - | - | - | ✓ Reviewed | USGS → |
At 21:59 UTC on December 20, 2023, a magnitude 3.0 tremor occurred 155 km S of False Pass, Alaska. Coming 2 hours after a magnitude 3.3 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 21:36:56 UTC | 2.0ml | 59 km SE of Denali National Park, Alaska 63.183°, -150.849° | 126.9 km | - | - | - | ✓ Reviewed | USGS → |
On December 20, 2023, worldwide seismic activity registered a magnitude 2.0 earthquake 59 km SE of Denali National Park, Alaska at 21:36 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 21:25:29 UTC | 2.2ml | 56 km S of Whites City, New Mexico 31.663°, -104.333° | 7.1 km | - | - | - | ✓ Reviewed | USGS → |
At 21:25 UTC on December 20, 2023, a magnitude 2.2 tremor occurred 56 km S of Whites City, New Mexico. It arrived roughly 5 hours after a larger magnitude 2.9 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 20:53:24 UTC | 3.5md | 2 km SE of Salinas, Puerto Rico 17.959°, -66.282° | 7.0 km | 10 | - | - | ✓ Reviewed | USGS → |
December 20, 2023 brought a magnitude 3.5 earthquake 2 km SE of Salinas, Puerto Rico, logged at 20:53 UTC. In the 72 hours after this event, the USGS recorded 3 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 20:52:56 UTC | 2.2md | 6 km SSE of Salinas, Puerto Rico 17.925°, -66.279° | 8.7 km | - | - | - | ✓ Reviewed | USGS → |
On December 20, 2023, worldwide seismic activity registered a magnitude 2.2 earthquake 6 km SSE of Salinas, Puerto Rico at 20:52 UTC. Coming 14 hours after a magnitude 2.9 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. | ||||||||
2023-12-20 2023-12-20 20:49:50 UTC | 3.0ml | 30 km SE of Funny River, Alaska 60.328°, -150.327° | 55.1 km | - | II | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.0 earthquake 30 km SE of Funny River, Alaska at 20:49 UTC on December 20, 2023. The event was offshore. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 20:44:02 UTC | 4.6mb | 45 km W of Labuha, Indonesia -0.690°, 127.074° | 54.4 km | - | - | - | ✓ Reviewed | USGS → |
December 20, 2023 brought a magnitude 4.6 earthquake 45 km W of Labuha, Indonesia, logged at 20:44 UTC. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 20:31:33 UTC | 4.2mb | south of the Fiji Islands -23.054°, -179.465° | 564.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.2 seismic event took place south of the Fiji Islands on December 20, 2023 at 20:31 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. | ||||||||
2023-12-20 2023-12-20 20:26:09 UTC | 4.6mb | Pacific-Antarctic Ridge -56.611°, -143.613° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On December 20, 2023 at 20:26 UTC, a magnitude 4.6 earthquake struck near Pacific-Antarctic Ridge. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 20:11:06 UTC | 2.3md | 6 km SSE of Salinas, Puerto Rico 17.924°, -66.280° | 14.5 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.3 earthquake 6 km SSE of Salinas, Puerto Rico came in on December 20, 2023 at 20:11 UTC. Coming 13 hours after a magnitude 2.9 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. | ||||||||
2023-12-20 2023-12-20 20:03:06 UTC | 3.3ml | 165 km S of False Pass, Alaska 53.366°, -163.551° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.3 earthquake was recorded 165 km S of False Pass, Alaska on December 20, 2023 at 20:03 UTC. The event was offshore. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 20:02:13 UTC | 4.6mb | 41 km WNW of Linxia Chengguanzhen, China 35.786°, 102.809° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.6 earthquake was recorded 41 km WNW of Linxia Chengguanzhen, China on December 20, 2023 at 20:02 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 19:54:31 UTC | 2.1md | 2 km S of Pāhala, Hawaii 19.177°, -155.476° | 34.1 km | - | - | - | Auto | USGS → |
December 20, 2023 brought a magnitude 2.1 earthquake 2 km S of Pāhala, Hawaii, logged at 19:54 UTC. It arrived roughly 3 hours after a larger magnitude 2.4 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. | ||||||||
2023-12-20 2023-12-20 19:35:40 UTC | 2.3ml | 1 km S of Pāhala, Hawaii 19.186°, -155.476° | 33.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 seismic event took place 1 km S of Pāhala, Hawaii on December 20, 2023 at 19:35 UTC. It arrived roughly 3 hours after a larger magnitude 2.4 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 18:47:31 UTC | 2.7ml | 31 km NNE of Sheridan, Wyoming 45.050°, -106.773° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
On December 20, 2023 at 18:47 UTC, a magnitude 2.7 earthquake struck 31 km NNE of Sheridan, Wyoming. It arrived roughly 1 hours after a larger magnitude 3.3 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 M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 18:35:42 UTC | 4.1mb | 215 km SSE of Taliwang, Indonesia -10.650°, 117.268° | 18.1 km | - | - | - | ✓ Reviewed | USGS → |
At 18:35 UTC on December 20, 2023, a magnitude 4.1 tremor occurred 215 km SSE of Taliwang, Indonesia. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 18:28:12 UTC | 2.6ml | 128 km SE of Akutan, Alaska 53.494°, -164.155° | 29.7 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.6 earthquake 128 km SE of Akutan, Alaska came in on December 20, 2023 at 18:28 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-12-20 2023-12-20 18:26:04 UTC | 3.3ml | 23 km WSW of Birney, Montana 45.206°, -106.764° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.3 earthquake 23 km WSW of Birney, Montana with origin time 18:26 UTC on December 20, 2023. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. 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 December 20, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.