Earthquakes on March 20, 2023
267
EARTHQUAKES on March 20, 2023
24-hour UTC period · USGS data
LARGEST: M5.1 — South Sandwich Islands region
131 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
1
M4.0–4.9
29
M3.0–3.9
5
M2.0–2.9
54
M1.0–1.9
178
Activity Summary
267
Total earthquakes
~250
Daily average
Normal
Activity level
1
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.1
South Sandwich Islands region
11:57 UTC · 131.0 km deep
4.9
111 km NNW of Nikolski, Alaska
23:25 UTC · 215.1 km deep
Felt by 2
4.9
2 km SSE of Arcani, Romania
14:02 UTC · 10.0 km deep
Felt by 132
4.9
Izu Islands, Japan region
07:08 UTC · 10.0 km deep
4.8
Kermadec Islands, New Zealand
23:12 UTC · 17.6 km deep
4.7
Kermadec Islands region
08:43 UTC · 10.0 km deep
4.6
138 km ENE of Hasaki, Japan
12:06 UTC · 10.0 km deep
4.6
28 km SSE of Hasaki, Japan
01:59 UTC · 31.3 km deep
Felt by 1
Earthquake Map — March 20, 2023
All Earthquakes — March 20, 2023
Showing 30 of 89 (filtered from 267)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-03-20 2023-03-20 23:32:12 UTC | 3.6mb | 84 km NW of Nikolski, Alaska 53.566°, -169.581° | 226.0 km | - | - | - | ✓ Reviewed | USGS → |
On March 20, 2023 at 23:32 UTC, a magnitude 3.6 earthquake struck 84 km NW of Nikolski, Alaska. The event was offshore. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 23:25:28 UTC | 4.9mb | 111 km NNW of Nikolski, Alaska 53.790°, -169.751° | 215.1 km | 2 | II | - | ✓ Reviewed | USGS → |
A magnitude 4.9 earthquake was recorded 111 km NNW of Nikolski, Alaska on March 20, 2023 at 23:25 UTC. A tsunami evaluation was automatically initiated given the magnitude and location. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 23:24:46 UTC | 2.0ml | 32 km E of Port Heiden, Alaska 56.901°, -158.107° | 1.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:24 UTC on March 20, 2023, a magnitude 2.0 tremor occurred 32 km E of Port Heiden, Alaska. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 23:23:01 UTC | 2.0ml | 34 km E of Port Heiden, Alaska 56.920°, -158.068° | 1.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.0 earthquake 34 km E of Port Heiden, Alaska at 23:23 UTC on March 20, 2023. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 23:12:06 UTC | 4.8mb | Kermadec Islands, New Zealand -30.531°, -177.343° | 17.6 km | - | - | - | ✓ Reviewed | USGS → |
At 23:12 UTC on March 20, 2023, a magnitude 4.8 tremor occurred near Kermadec Islands, New Zealand. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 23:08:56 UTC | 2.3ml | 100 km W of Adak, Alaska 51.859°, -178.093° | 3.3 km | - | - | - | ✓ Reviewed | USGS → |
On March 20, 2023 at 23:08 UTC, a magnitude 2.3 earthquake struck 100 km W of Adak, Alaska. It arrived roughly 6 hours after a larger magnitude 2.5 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 M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 22:54:26 UTC | 2.5md | 13 km SSW of Rio Grande, Ohio 38.738°, -82.429° | 5.5 km | 11 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 seismic event took place 13 km SSW of Rio Grande, Ohio on March 20, 2023 at 22:54 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 22:47:53 UTC | 4.4mb | off the east coast of the North Island of New Zealand -37.099°, 179.197° | 25.6 km | - | - | - | ✓ Reviewed | USGS → |
On March 20, 2023, worldwide seismic activity registered a magnitude 4.4 earthquake near off the east coast of the North Island of New Zealand at 22:47 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 22:38:31 UTC | 2.5ml | 9 km NE of Badger, Alaska 64.851°, -147.377° | 23.6 km | 5 | - | - | ✓ Reviewed | USGS → |
March 20, 2023 brought a magnitude 2.5 earthquake 9 km NE of Badger, Alaska, logged at 22:38 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 22:17:59 UTC | 2.9ml | 20 km NNW of Gillette, Wyoming 44.461°, -105.598° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.9 earthquake 20 km NNW of Gillette, Wyoming came in on March 20, 2023 at 22:17 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 22:16:11 UTC | 2.7md | 5 km WSW of Guánica, Puerto Rico 17.949°, -66.953° | 6.5 km | - | - | - | ✓ Reviewed | USGS → |
At 22:16 UTC on March 20, 2023, a magnitude 2.7 tremor occurred 5 km WSW of Guánica, Puerto Rico. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 22:15:02 UTC | 2.2ml | 98 km W of Adak, Alaska 51.858°, -178.057° | 1.6 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.2 earthquake 98 km W of Adak, Alaska came in on March 20, 2023 at 22:15 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.5 earthquake that occurred about 5 hours earlier. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 22:09:54 UTC | 2.2md | 3km ESE of Round Valley, CA 37.407°, -118.568° | 13.1 km | - | - | - | ✓ Reviewed | USGS → |
At 22:09 UTC on March 20, 2023, a magnitude 2.2 tremor occurred 3km ESE of Round Valley, CA. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 22:07:58 UTC | 2.0ml | 5km NNE of Banning, CA 33.970°, -116.858° | 18.5 km | - | - | - | ✓ Reviewed | USGS → |
On March 20, 2023, worldwide seismic activity registered a magnitude 2.0 earthquake 5km NNE of Banning, CA at 22:07 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 22:05:03 UTC | 2.4ml | 97 km SSE of Sand Point, Alaska 54.577°, -159.734° | 11.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.4 earthquake 97 km SSE of Sand Point, Alaska with origin time 22:05 UTC on March 20, 2023. This event falls inside the aftershock decay of a nearby magnitude 2.8 earthquake that occurred about 20 hours earlier. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 21:47:58 UTC | 2.3ml | Andreanof Islands, Aleutian Islands, Alaska 51.837°, -178.065° | 1.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 earthquake was recorded near Andreanof Islands, Aleutian Islands, Alaska on March 20, 2023 at 21:47 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.5 earthquake that occurred about 4 hours earlier. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 21:41:31 UTC | 2.0ml | 56 km WNW of Ninilchik, Alaska 60.250°, -152.608° | 101.7 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 56 km WNW of Ninilchik, Alaska on March 20, 2023, with origin time 21:41 UTC. Coming 16 hours after a magnitude 2.9 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. | ||||||||
2023-03-20 2023-03-20 21:28:39 UTC | 4.5mb | 18 km NNE of Urakawa, Japan 42.298°, 142.904° | 84.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 seismic event took place 18 km NNE of Urakawa, Japan on March 20, 2023 at 21:28 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 21:21:30 UTC | 2.4ml | 97 km W of Adak, Alaska 51.859°, -178.050° | 3.5 km | - | - | - | ✓ Reviewed | USGS → |
On March 20, 2023, worldwide seismic activity registered a magnitude 2.4 earthquake 97 km W of Adak, Alaska at 21:21 UTC. Coming 4 hours after a magnitude 2.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 21:13:27 UTC | 4.5mb | 28 km W of Litayan, Philippines 7.331°, 123.780° | 597.9 km | - | - | - | ✓ Reviewed | USGS → |
March 20, 2023 brought a magnitude 4.5 earthquake 28 km W of Litayan, Philippines, logged at 21:13 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. | ||||||||
2023-03-20 2023-03-20 20:59:49 UTC | 2.4ml | 52 km NW of Toyah, Texas 31.601°, -104.236° | 4.9 km | - | - | - | ✓ Reviewed | USGS → |
At 20:59 UTC on March 20, 2023, a magnitude 2.4 tremor occurred 52 km NW of Toyah, Texas. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 20:48:15 UTC | 2.1ml | 100 km W of Adak, Alaska 51.859°, -178.096° | 5.2 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.1 earthquake 100 km W of Adak, Alaska came in on March 20, 2023 at 20:48 UTC. Coming 3 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 M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 20:02:25 UTC | 4.5mb | 54 km NW of Finschhafen, Papua New Guinea -6.163°, 147.556° | 75.9 km | - | - | - | ✓ Reviewed | USGS → |
On March 20, 2023 at 20:02 UTC, a magnitude 4.5 earthquake struck 54 km NW of Finschhafen, Papua New Guinea. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 19:49:41 UTC | 2.4ml | 108 km NW of Diomede, Alaska 66.537°, -170.388° | 20.1 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.4 earthquake 108 km NW of Diomede, Alaska at 19:49 UTC on March 20, 2023. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 19:22:16 UTC | 2.2ml | 48 km NW of Beluga, Alaska 61.484°, -151.651° | 79.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 48 km NW of Beluga, Alaska on March 20, 2023 at 19:22 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 19:18:38 UTC | 2.2ml | 64 km N of Petersville, Alaska 63.067°, -150.913° | 116.9 km | - | - | - | ✓ Reviewed | USGS → |
March 20, 2023 brought a magnitude 2.2 earthquake 64 km N of Petersville, Alaska, logged at 19:18 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 19:03:46 UTC | 3.0ml | 9 km E of Wright, Wyoming 43.742°, -105.380° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
At 19:03 UTC on March 20, 2023, a magnitude 3.0 tremor occurred 9 km E of Wright, Wyoming. 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. | ||||||||
2023-03-20 2023-03-20 19:01:04 UTC | 4.4mb | 30 km SSE of Atiquipa, Peru -16.063°, -74.281° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
At 19:01 UTC on March 20, 2023, a magnitude 4.4 tremor occurred 30 km SSE of Atiquipa, Peru. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 18:56:09 UTC | 4.4mb | 129 km E of Madang, Papua New Guinea -5.438°, 146.932° | 210.6 km | 1 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.4 earthquake 129 km E of Madang, Papua New Guinea at 18:56 UTC on March 20, 2023. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-03-20 2023-03-20 17:21:03 UTC | 2.2md | 15km NNE of Deep Springs, CA 37.505°, -117.943° | -0.9 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.2 earthquake 15km NNE of Deep Springs, CA at 17:21 UTC on March 20, 2023. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.2 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 March 20, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.