Earthquakes on January 4, 2021
429
EARTHQUAKES on January 4, 2021
24-hour UTC period · USGS data
LARGEST: M5.0 — South Sandwich Islands region
140 km deep
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
2
M4.0–4.9
21
M3.0–3.9
21
M2.0–2.9
103
M1.0–1.9
282
Activity Summary
429
Total earthquakes
~250
Daily average
Elevated
Activity level
2
M5.0+ events
Significant Earthquakes (M4.5+)
5.0
South Sandwich Islands region
12:16 UTC · 139.7 km deep
5.0
4 km N of Luocheng, China
02:58 UTC · 10.0 km deep
Felt by 1
4.9
central Mid-Atlantic Ridge
08:53 UTC · 10.0 km deep
4.8
Greenland Sea
14:38 UTC · 10.0 km deep
4.7
191 km N of Siglufjörður, Iceland
08:37 UTC · 10.0 km deep
4.7
South Sandwich Islands region
06:39 UTC · 10.0 km deep
4.6
20 km NW of Piti Village, Guam
15:54 UTC · 120.0 km deep
4.5
off the coast of Central America
23:46 UTC · 10.0 km deep
Earthquake Map — January 4, 2021
All Earthquakes — January 4, 2021
Showing 30 of 147 (filtered from 429)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-01-04 2021-01-04 23:46:38 UTC | 4.5mb | off the coast of Central America 4.420°, -84.151° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.5 earthquake near off the coast of Central America came in on January 4, 2021 at 23:46 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 23:46:23 UTC | 3.8md | 122 km NNW of San Antonio, Puerto Rico 19.462°, -67.651° | 26.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.8 earthquake 122 km NNW of San Antonio, Puerto Rico at 23:46 UTC on January 4, 2021. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 23:36:43 UTC | 3.1md | 21 km SSE of Lamboglia, Puerto Rico 17.796°, -65.938° | 5.0 km | 2 | - | - | ✓ Reviewed | USGS → |
January 4, 2021 brought a magnitude 3.1 earthquake 21 km SSE of Lamboglia, Puerto Rico, logged at 23:36 UTC. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 23:35:37 UTC | 2.1ml | 98 km SSE of Sand Point, Alaska 54.549°, -159.808° | 7.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 98 km SSE of Sand Point, Alaska on January 4, 2021 at 23:35 UTC. It arrived roughly 17 hours after a larger magnitude 2.6 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. | ||||||||
2021-01-04 2021-01-04 23:33:55 UTC | 2.2ml | 18km WSW of Delta, B.C., MX 32.320°, -115.380° | 18.6 km | - | - | - | ✓ Reviewed | USGS → |
On January 4, 2021 at 23:33 UTC, a magnitude 2.2 earthquake struck 18km WSW of Delta, B.C., MX. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 23:15:57 UTC | 2.0md | 6 km SE of Maria Antonia, Puerto Rico 17.934°, -66.847° | 12.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:15 UTC on January 4, 2021, a magnitude 2.0 tremor occurred 6 km SE of Maria Antonia, Puerto Rico. Coming 4 hours after a magnitude 3.8 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 23:02:45 UTC | 4.3mb | south of the Fiji Islands -25.283°, 179.858° | 499.6 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.3 earthquake south of the Fiji Islands at 23:02 UTC on January 4, 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. | ||||||||
2021-01-04 2021-01-04 22:57:18 UTC | 2.0ml | 73 km SE of Sand Point, Alaska 54.827°, -159.756° | 11.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 73 km SE of Sand Point, Alaska on January 4, 2021 at 22:57 UTC. It arrived roughly 2 hours after a larger magnitude 2.1 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 22:55:46 UTC | 4.5mb | south of the Fiji Islands -24.532°, -179.968° | 486.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 seismic event took place south of the Fiji Islands on January 4, 2021 at 22:55 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 22:55:02 UTC | 2.0md | 8 km SSE of Maria Antonia, Puerto Rico 17.907°, -66.856° | 16.0 km | - | - | - | ✓ Reviewed | USGS → |
January 4, 2021 brought a magnitude 2.0 earthquake 8 km SSE of Maria Antonia, Puerto Rico, logged at 22:55 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.8 earthquake that occurred about 4 hours earlier. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 22:48:53 UTC | 2.3md | 8 km SSE of Maria Antonia, Puerto Rico 17.911°, -66.851° | 16.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.3 earthquake 8 km SSE of Maria Antonia, Puerto Rico at 22:48 UTC on January 4, 2021. This event falls inside the aftershock decay of a nearby magnitude 3.8 earthquake that occurred about 4 hours earlier. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 22:45:28 UTC | 2.3ml | south of Alaska 54.338°, -159.726° | 20.8 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.3 earthquake south of Alaska came in on January 4, 2021 at 22:45 UTC. Coming 19 hours after a magnitude 2.8 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. | ||||||||
2021-01-04 2021-01-04 22:39:51 UTC | 2.3ml | 16km E of Ocotillo, CA 32.742°, -115.822° | 9.9 km | - | - | - | ✓ Reviewed | USGS → |
On January 4, 2021, worldwide seismic activity registered a magnitude 2.3 earthquake 16km E of Ocotillo, CA at 22:39 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 22:29:50 UTC | 2.2md | 3 km W of Fuig, Puerto Rico 17.988°, -66.945° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.2 earthquake 3 km W of Fuig, Puerto Rico came in on January 4, 2021 at 22:29 UTC. It arrived roughly 3 hours after a larger magnitude 3.8 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. | ||||||||
2021-01-04 2021-01-04 22:28:25 UTC | 2.2ml | 114 km SSE of Sand Point, Alaska 54.376°, -159.840° | 14.1 km | - | - | - | ✓ Reviewed | USGS → |
On January 4, 2021, worldwide seismic activity registered a magnitude 2.2 earthquake 114 km SSE of Sand Point, Alaska at 22:28 UTC. It arrived roughly 18 hours after a larger magnitude 2.8 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. | ||||||||
2021-01-04 2021-01-04 21:34:49 UTC | 3.3ml | 44 km ESE of Akutan, Alaska 53.927°, -165.194° | 71.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.3 earthquake was recorded 44 km ESE of Akutan, Alaska on January 4, 2021 at 21:34 UTC. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 21:22:34 UTC | 3.0ml | 63 km NW of Mosquito Lake, Alaska 59.957°, -136.827° | 2.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.0 earthquake was recorded 63 km NW of Mosquito Lake, Alaska on January 4, 2021 at 21:22 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 21:22:10 UTC | 2.1ml | 87 km SE of Sand Point, Alaska 54.806°, -159.491° | 9.4 km | - | - | - | ✓ Reviewed | USGS → |
January 4, 2021 brought a magnitude 2.1 earthquake 87 km SE of Sand Point, Alaska, logged at 21:22 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 21:00:15 UTC | 2.4ml | 19 km SE of Fox River, Alaska 59.728°, -150.720° | 38.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 seismic event took place 19 km SE of Fox River, Alaska on January 4, 2021 at 21:00 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 20:54:08 UTC | 2.2ml | 5 km W of Stanley, Idaho 44.224°, -115.012° | 5.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 5 km W of Stanley, Idaho on January 4, 2021 at 20:54 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.8 earthquake that occurred about 14 hours earlier. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 20:53:51 UTC | 2.2md | 5 km ESE of Aguas Claras, Puerto Rico 18.238°, -65.605° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
On January 4, 2021, worldwide seismic activity registered a magnitude 2.2 earthquake 5 km ESE of Aguas Claras, Puerto Rico at 20:53 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 20:44:22 UTC | 4.0mb | 30 km SSW of False Pass, Alaska 54.583°, -163.517° | 87.5 km | - | - | - | ✓ Reviewed | USGS → |
On January 4, 2021 at 20:44 UTC, a magnitude 4.0 earthquake struck 30 km SSW of False Pass, Alaska. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 20:42:55 UTC | 2.4md | 5 km SSW of Indios, Puerto Rico 17.954°, -66.845° | 14.0 km | - | - | - | ✓ Reviewed | USGS → |
January 4, 2021 brought a magnitude 2.4 earthquake 5 km SSW of Indios, Puerto Rico, logged at 20:42 UTC. It arrived roughly 2 hours after a larger magnitude 3.8 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 20:36:29 UTC | 2.1ml | 84 km WSW of Adak, Alaska 51.471°, -177.663° | 43.7 km | - | - | - | ✓ Reviewed | USGS → |
On January 4, 2021 at 20:36 UTC, a magnitude 2.1 earthquake struck 84 km WSW of Adak, Alaska. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 20:08:38 UTC | 2.1ml | 103 km SSE of Sand Point, Alaska 54.489°, -159.841° | 14.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 103 km SSE of Sand Point, Alaska on January 4, 2021 at 20:08 UTC. It arrived roughly 11 hours after a larger magnitude 2.6 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. | ||||||||
2021-01-04 2021-01-04 19:48:07 UTC | 2.7ml | 80 km ESE of King Cove, Alaska 54.703°, -161.226° | 26.4 km | - | - | - | ✓ Reviewed | USGS → |
On January 4, 2021 at 19:48 UTC, a magnitude 2.7 earthquake struck 80 km ESE of King Cove, Alaska. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 19:44:53 UTC | 4.5mb | 66 km WNW of Villa Yapacaní, Bolivia -17.236°, -64.431° | 59.9 km | - | - | - | ✓ Reviewed | USGS → |
January 4, 2021 brought a magnitude 4.5 earthquake 66 km WNW of Villa Yapacaní, Bolivia, logged at 19:44 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 19:40:45 UTC | 2.1ml | 51 km NNW of Nikolai, Alaska 63.439°, -154.774° | 1.2 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.1 earthquake 51 km NNW of Nikolai, Alaska with origin time 19:40 UTC on January 4, 2021. 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. | ||||||||
2021-01-04 2021-01-04 19:36:15 UTC | 2.3md | 6 km S of Indios, Puerto Rico 17.937°, -66.808° | 12.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.3 event was detected 6 km S of Indios, Puerto Rico on January 4, 2021, with origin time 19:36 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.8 earthquake that occurred about 1 hours earlier. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-04 2021-01-04 19:27:44 UTC | 2.1ml | 11 km WSW of Stanley, Idaho 44.196°, -115.085° | 7.0 km | - | - | - | ✓ Reviewed | USGS → |
January 4, 2021 brought a magnitude 2.1 earthquake 11 km WSW of Stanley, Idaho, logged at 19:27 UTC. It arrived roughly 12 hours after a larger magnitude 2.8 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. | ||||||||
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 January 4, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.