Earthquakes on March 21, 2021
322
EARTHQUAKES on March 21, 2021
24-hour UTC period · USGS data
599 km deep · 1 person felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
3
M4.0–4.9
42
M3.0–3.9
5
M2.0–2.9
70
M1.0–1.9
202
Activity Summary
322
Total earthquakes
~250
Daily average
Elevated
Activity level
3
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.3
34 km N of Monteagudo, Bolivia
14:17 UTC · 599.0 km deep
Felt by 1
5.1
66 km SW of Ocós, Guatemala
05:02 UTC · 35.0 km deep
Felt by 1
5.0
160 km SSE of Ust’-Kamchatsk Staryy, Russia
21:13 UTC · 10.0 km deep
4.9
Kermadec Islands region
16:27 UTC · 10.0 km deep
4.9
207 km NE of Lospalos, Timor Leste
00:45 UTC · 173.6 km deep
4.8
north of Ascension Island
06:43 UTC · 10.0 km deep
4.7
92 km SSW of Uyuni, Bolivia
10:55 UTC · 186.0 km deep
Felt by 1
4.7
Kermadec Islands region
02:18 UTC · 10.0 km deep
Earthquake Map — March 21, 2021
All Earthquakes — March 21, 2021
Showing 30 of 120 (filtered from 322)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-03-21 2021-03-21 22:33:08 UTC | 3.1ml | 39km NNE of Toms Place, CA 37.897°, -118.554° | 6.2 km | 4 | III | - | ✓ Reviewed | USGS → |
March 21, 2021 brought a magnitude 3.1 earthquake 39km NNE of Toms Place, CA, logged at 22:33 UTC. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 22:19:40 UTC | 2.4ml | 10 km SW of Milford, Utah 38.341°, -113.106° | 5.5 km | - | - | - | ✓ Reviewed | USGS → |
At 22:19 UTC on March 21, 2021, a magnitude 2.4 tremor occurred 10 km SW of Milford, Utah. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 22:15:12 UTC | 4.1mb | 17 km ESE of Novaya Chara, Russia 56.732°, 118.533° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.1 seismic event took place 17 km ESE of Novaya Chara, Russia on March 21, 2021 at 22:15 UTC. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 22:13:42 UTC | 4.5mb | 185 km NW of Nuku‘alofa, Tonga -19.924°, -176.431° | 236.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.5 earthquake 185 km NW of Nuku‘alofa, Tonga with origin time 22:13 UTC on March 21, 2021. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 21:58:04 UTC | 4.4mb | 248 km E of Levuka, Fiji -18.461°, -178.367° | 583.3 km | - | - | - | ✓ Reviewed | USGS → |
March 21, 2021 brought a magnitude 4.4 earthquake 248 km E of Levuka, Fiji, logged at 21:58 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 21:32:35 UTC | 2.1ml | 11 km SE of Ratliff City, Oklahoma 34.381°, -97.410° | 4.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 11 km SE of Ratliff City, Oklahoma on March 21, 2021 at 21:32 UTC. Coming 9 hours after a magnitude 2.4 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 M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 21:30:07 UTC | 4.3mb | Kermadec Islands region -28.200°, -176.962° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.3 event was detected in the Kermadec Islands region on March 21, 2021, with origin time 21:30 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 21:16:29 UTC | 2.2ml | 44 km ENE of Pedro Bay, Alaska 59.886°, -153.343° | 137.1 km | - | - | - | ✓ Reviewed | USGS → |
On March 21, 2021 at 21:16 UTC, a magnitude 2.2 earthquake struck 44 km ENE of Pedro Bay, Alaska. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 21:13:12 UTC | 5.0mww | 160 km SSE of Ust’-Kamchatsk Staryy, Russia 54.869°, 163.304° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 5.0 earthquake 160 km SSE of Ust’-Kamchatsk Staryy, Russia with origin time 21:13 UTC on March 21, 2021. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 20:58:16 UTC | 4.4mb | 162 km S of Severo-Kuril’sk, Russia 49.219°, 156.016° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
On March 21, 2021 at 20:58 UTC, a magnitude 4.4 earthquake struck 162 km S of Severo-Kuril’sk, Russia. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 20:44:13 UTC | 2.5md | 15km N of Morgan Hill, CA 37.261°, -121.636° | 6.1 km | 7 | - | - | ✓ Reviewed | USGS → |
On March 21, 2021, worldwide seismic activity registered a magnitude 2.5 earthquake 15km N of Morgan Hill, CA at 20:44 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 20:30:32 UTC | 2.1ml | 61 km SE of Akutan, Alaska 53.690°, -165.228° | 25.9 km | - | - | - | ✓ Reviewed | USGS → |
March 21, 2021 brought a magnitude 2.1 earthquake 61 km SE of Akutan, Alaska, logged at 20:30 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 19:52:40 UTC | 2.3ml | 61 km WNW of Happy Valley, Alaska 60.141°, -152.764° | 104.3 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.3 earthquake 61 km WNW of Happy Valley, Alaska came in on March 21, 2021 at 19:52 UTC. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 19:31:40 UTC | 2.4ml | 42 km NNW of Stanley, Idaho 44.539°, -115.227° | 4.3 km | - | - | - | ✓ Reviewed | USGS → |
On March 21, 2021, worldwide seismic activity registered a magnitude 2.4 earthquake 42 km NNW of Stanley, Idaho at 19:31 UTC. 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. | ||||||||
2021-03-21 2021-03-21 19:14:27 UTC | 2.1md | 10 km WSW of Alton, Utah 37.418°, -112.604° | 5.5 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.1 earthquake 10 km WSW of Alton, Utah came in on March 21, 2021 at 19:14 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 19:04:50 UTC | 2.6ml | 1km ESE of Loma Linda, CA 34.044°, -117.252° | 16.2 km | 4 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.6 event was detected 1km ESE of Loma Linda, CA on March 21, 2021, with origin time 19:04 UTC. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 18:59:27 UTC | 4.1mb | south of the Kermadec Islands -33.883°, -178.588° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
March 21, 2021 brought a magnitude 4.1 earthquake south of the Kermadec Islands, logged at 18:59 UTC. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 18:28:15 UTC | 2.1ml | 25 km WNW of Beaver, Alaska 66.428°, -147.940° | 18.6 km | - | - | - | ✓ Reviewed | USGS → |
On March 21, 2021 at 18:28 UTC, a magnitude 2.1 earthquake struck 25 km WNW of Beaver, Alaska. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 18:23:10 UTC | 2.6ml | 58 km S of Whites City, New Mexico 31.653°, -104.301° | 7.0 km | 1 | - | - | ✓ Reviewed | USGS → |
March 21, 2021 brought a magnitude 2.6 earthquake 58 km S of Whites City, New Mexico, logged at 18:23 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 18:12:32 UTC | 2.0ml | 9 km ESE of Ratliff City, Oklahoma 34.400°, -97.420° | 4.9 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.0 earthquake 9 km ESE of Ratliff City, Oklahoma at 18:12 UTC on March 21, 2021. This event falls inside the aftershock decay of a nearby magnitude 2.4 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 M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 17:49:46 UTC | 4.3mb | 167 km SSE of Lata, Solomon Islands -12.008°, 166.608° | 132.6 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.3 earthquake 167 km SSE of Lata, Solomon Islands came in on March 21, 2021 at 17:49 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 17:25:31 UTC | 2.1md | 10 km ENE of P?hala, Hawaii 19.225°, -155.380° | 31.2 km | - | - | - | Auto | USGS → |
This magnitude 2.1 event was detected 10 km ENE of P?hala, Hawaii on March 21, 2021, with origin time 17:25 UTC. It arrived roughly 1 hours after a larger magnitude 2.4 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. | ||||||||
2021-03-21 2021-03-21 17:15:54 UTC | 2.3ml | 16 km NW of La Pocatière, Canada 47.456°, -70.210° | 15.4 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 seismic event took place 16 km NW of La Pocatière, Canada on March 21, 2021 at 17:15 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 17:15:54 UTC | 4.3mb | 9 km E of Verdikoússa, Greece 39.769°, 22.089° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 seismic event took place 9 km E of Verdikoússa, Greece on March 21, 2021 at 17:15 UTC. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 16:44:41 UTC | 4.3mb | 3 km NE of Cepitá, Colombia 6.780°, -72.955° | 148.1 km | - | - | - | ✓ Reviewed | USGS → |
March 21, 2021 brought a magnitude 4.3 earthquake 3 km NE of Cepitá, Colombia, logged at 16:44 UTC. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 16:34:53 UTC | 2.4md | 4 km ENE of La Parguera, Puerto Rico 17.995°, -67.013° | 6.0 km | - | - | - | ✓ Reviewed | USGS → |
On March 21, 2021 at 16:34 UTC, a magnitude 2.4 earthquake struck 4 km ENE of La Parguera, Puerto Rico. This event falls inside the aftershock decay of a nearby magnitude 2.6 earthquake that occurred about 11 hours earlier. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 16:30:09 UTC | 4.6mb | 73 km NNW of Tobelo, Indonesia 2.322°, 127.719° | 119.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.6 seismic event took place 73 km NNW of Tobelo, Indonesia on March 21, 2021 at 16:30 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 16:27:18 UTC | 4.9mb | Kermadec Islands region -28.625°, -176.587° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On March 21, 2021, worldwide seismic activity registered a magnitude 4.9 earthquake in the Kermadec Islands region at 16:27 UTC. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-21 2021-03-21 16:20:36 UTC | 2.1md | Island of Hawaii, Hawaii 19.198°, -155.441° | 38.0 km | - | - | - | Auto | USGS → |
A magnitude 2.1 seismic event took place near Island of Hawaii, Hawaii on March 21, 2021 at 16:20 UTC. It arrived roughly 1 hours after a larger magnitude 2.4 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. | ||||||||
2021-03-21 2021-03-21 16:16:34 UTC | 4.4mb | south of the Fiji Islands -23.827°, -179.893° | 515.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded south of the Fiji Islands on March 21, 2021 at 16:16 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.4 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 21, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.