Earthquakes on January 23, 2021
373
EARTHQUAKES on January 23, 2021
24-hour UTC period · USGS data
LARGEST: M6.9 — South Shetland Islands
15 km deep · 8 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
8
M4.0–4.9
33
M3.0–3.9
10
M2.0–2.9
89
M1.0–1.9
233
Activity Summary
373
Total earthquakes
~250
Daily average
Elevated
Activity level
8
M5.0+ events
Significant Earthquakes (M4.5+)
6.9
South Shetland Islands
23:36 UTC · 15.0 km deep
Felt by 8
5.8
36 km NW of Finschhafen, Papua New Guinea
03:19 UTC · 27.0 km deep
Felt by 4
5.5
south of the Fiji Islands
11:47 UTC · 430.7 km deep
5.4
South Shetland Islands
23:48 UTC · 10.0 km deep
5.4
36 km NNW of Finschhafen, Papua New Guinea
16:58 UTC · 35.1 km deep
5.2
34 km NW of Finschhafen, Papua New Guinea
08:34 UTC · 38.5 km deep
5.0
South Sandwich Islands region
12:06 UTC · 72.6 km deep
5.0
20 km E of Shizunai-furukawach?, Japan
05:39 UTC · 108.2 km deep
Earthquake Map — January 23, 2021
All Earthquakes — January 23, 2021
Showing 30 of 140 (filtered from 373)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-01-23 2021-01-23 23:52:15 UTC | 4.7mb | South Shetland Islands -61.760°, -55.652° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.7 earthquake was recorded near South Shetland Islands on January 23, 2021 at 23:52 UTC. Coming 1 hours after a magnitude 6.9 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 23:48:39 UTC | 5.4mb | South Shetland Islands -61.697°, -55.294° | 10.0 km | - | III | green | ✓ Reviewed | USGS → |
On January 23, 2021, worldwide seismic activity registered a magnitude 5.4 earthquake near South Shetland Islands at 23:48 UTC. It arrived roughly 1 hours after a larger magnitude 6.9 mainshock in the same 20 km area, placing it within the typical aftershock window. 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. | ||||||||
2021-01-23 2021-01-23 23:41:22 UTC | 2.3md | 3 km SSW of Guánica, Puerto Rico 17.942°, -66.924° | 12.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.3 earthquake 3 km SSW of Guánica, Puerto Rico came in on January 23, 2021 at 23:41 UTC. Coming 20 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. | ||||||||
2021-01-23 2021-01-23 23:36:51 UTC | 6.9mww | South Shetland Islands -61.810°, -55.503° | 15.0 km | 8 | V | green | ✓ Reviewed | USGS → |
On January 23, 2021 at 23:36 UTC, a magnitude 6.9 earthquake struck near South Shetland Islands. A tsunami evaluation was automatically initiated given the magnitude and location. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M6.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 23:36:01 UTC | 4.5mb | Kermadec Islands region -28.245°, -176.234° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.5 earthquake in the Kermadec Islands region came in on January 23, 2021 at 23:36 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 22:52:34 UTC | 2.7ml | 68 km WNW of Happy Valley, Alaska 60.108°, -152.925° | 109.0 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.7 seismic event took place 68 km WNW of Happy Valley, Alaska on January 23, 2021 at 22:52 UTC. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 22:49:21 UTC | 2.7md | 2 km NE of La Parguera, Puerto Rico 17.995°, -67.028° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.7 earthquake was recorded 2 km NE of La Parguera, Puerto Rico on January 23, 2021 at 22:49 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.8 earthquake that occurred about 19 hours earlier. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 22:44:56 UTC | 2.2md | 3 km W of Fuig, Puerto Rico 17.985°, -66.953° | 7.0 km | - | - | - | ✓ Reviewed | USGS → |
At 22:44 UTC on January 23, 2021, a magnitude 2.2 tremor occurred 3 km W of Fuig, Puerto Rico. Coming 19 hours after a magnitude 2.8 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 22:37:48 UTC | 4.3mb | 15 km W of Mendoza, Argentina -32.907°, -68.991° | 10.0 km | 3 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.3 earthquake 15 km W of Mendoza, Argentina came in on January 23, 2021 at 22:37 UTC. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 22:32:42 UTC | 2.2md | 8km WSW of Petrolia, CA 40.291°, -124.372° | 14.0 km | - | - | - | ✓ Reviewed | USGS → |
January 23, 2021 brought a magnitude 2.2 earthquake 8km WSW of Petrolia, CA, logged at 22:32 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 22:28:00 UTC | 2.9ml | 117 km SSE of Sand Point, Alaska 54.373°, -159.763° | 20.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 earthquake was recorded 117 km SSE of Sand Point, Alaska on January 23, 2021 at 22:28 UTC. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 22:26:35 UTC | 2.6ml | 16km E of Ocotillo, CA 32.747°, -115.827° | 10.3 km | 2 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.6 earthquake 16km E of Ocotillo, CA at 22:26 UTC on January 23, 2021. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 21:42:38 UTC | 4.0mb | 135 km SW of Atocha, Bolivia -21.859°, -67.081° | 199.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.0 seismic event took place 135 km SW of Atocha, Bolivia on January 23, 2021 at 21:42 UTC. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 21:12:18 UTC | 4.9mww | 25 km E of Baraya, Colombia 3.122°, -74.825° | 25.1 km | 29 | - | - | ✓ Reviewed | USGS → |
A magnitude 4.9 seismic event took place 25 km E of Baraya, Colombia on January 23, 2021 at 21:12 UTC. The event was offshore. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 21:09:34 UTC | 2.1md | 4 km S of Maria Antonia, Puerto Rico 17.938°, -66.883° | 7.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.1 earthquake 4 km S of Maria Antonia, Puerto Rico with origin time 21:09 UTC on January 23, 2021. This event falls inside the aftershock decay of a nearby magnitude 2.8 earthquake that occurred about 17 hours earlier. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 21:06:06 UTC | 2.7ml | 117 km SSE of Sand Point, Alaska 54.349°, -159.832° | 19.5 km | - | - | - | ✓ Reviewed | USGS → |
January 23, 2021 brought a magnitude 2.7 earthquake 117 km SSE of Sand Point, Alaska, logged at 21:06 UTC. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 20:52:52 UTC | 4.3mb | 54 km SE of Koseda, Japan 30.057°, 131.063° | 42.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 seismic event took place 54 km SE of Koseda, Japan on January 23, 2021 at 20:52 UTC. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 20:51:29 UTC | 2.2md | 24 km SE of Emajagua, Puerto Rico 17.849°, -65.717° | 19.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.2 earthquake 24 km SE of Emajagua, Puerto Rico at 20:51 UTC on January 23, 2021. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 20:40:36 UTC | 2.2ml | 79 km ENE of Port Alsworth, Alaska 60.578°, -153.082° | 138.4 km | - | - | - | ✓ Reviewed | USGS → |
On January 23, 2021 at 20:40 UTC, a magnitude 2.2 earthquake struck 79 km ENE of Port Alsworth, Alaska. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 19:55:48 UTC | 2.6ml | 26 km NNE of Point Possession, Alaska 61.156°, -150.554° | 49.4 km | - | - | - | ✓ Reviewed | USGS → |
At 19:55 UTC on January 23, 2021, a magnitude 2.6 tremor occurred 26 km NNE of Point Possession, Alaska. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 19:38:36 UTC | 4.7mb | 77 km SSW of Pangai, Tonga -20.450°, -174.673° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.7 earthquake 77 km SSW of Pangai, Tonga with origin time 19:38 UTC on January 23, 2021. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 19:37:22 UTC | 2.0ml | 2 km WNW of Badger, Alaska 64.813°, -147.583° | 8.2 km | - | - | - | ✓ Reviewed | USGS → |
On January 23, 2021 at 19:37 UTC, a magnitude 2.0 earthquake struck 2 km WNW of Badger, Alaska. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 19:27:47 UTC | 3.0ml | 113 km SE of King Cove, Alaska 54.241°, -161.261° | 2.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.0 seismic event took place 113 km SE of King Cove, Alaska on January 23, 2021 at 19:27 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. | ||||||||
2021-01-23 2021-01-23 19:19:01 UTC | 4.6mb | 20 km WSW of Pocito, Argentina -31.749°, -68.789° | 18.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.6 earthquake 20 km WSW of Pocito, Argentina at 19:19 UTC on January 23, 2021. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 18:41:17 UTC | 2.0ml | 68 km ESE of Denali National Park, Alaska 63.230°, -150.531° | 117.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 68 km ESE of Denali National Park, Alaska on January 23, 2021 at 18:41 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 18:40:38 UTC | 2.2ml | 30 km SE of Mina, Nevada 38.179°, -117.887° | 8.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 30 km SE of Mina, Nevada on January 23, 2021 at 18:40 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 M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 18:18:32 UTC | 2.2md | 3 km SE of Magas Arriba, Puerto Rico 18.001°, -66.746° | 8.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.2 event was detected 3 km SE of Magas Arriba, Puerto Rico on January 23, 2021, with origin time 18:18 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.8 earthquake that occurred about 4 hours earlier. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 17:37:06 UTC | 4.5mb | south of the Fiji Islands -24.487°, 179.630° | 518.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 seismic event took place south of the Fiji Islands on January 23, 2021 at 17:37 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. | ||||||||
2021-01-23 2021-01-23 17:15:56 UTC | 2.3ml | 104 km SSE of Sand Point, Alaska 54.512°, -159.731° | 13.2 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.3 earthquake 104 km SSE of Sand Point, Alaska with origin time 17:15 UTC on January 23, 2021. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-01-23 2021-01-23 17:08:07 UTC | 4.5mb | 25 km N of Finschhafen, Papua New Guinea -6.326°, 147.851° | 61.5 km | - | - | - | ✓ Reviewed | USGS → |
January 23, 2021 brought a magnitude 4.5 earthquake 25 km N of Finschhafen, Papua New Guinea, logged at 17:08 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.4 earthquake that occurred about 1 hours earlier. The event was offshore. See the M4.5 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 23, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.