Earthquakes on March 21, 2025
284
EARTHQUAKES on March 21, 2025
24-hour UTC period · USGS data
LARGEST: M6.2 — 88 km SSE of Adak, Alaska
17 km deep · 7 people felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
7
M4.0–4.9
30
M3.0–3.9
32
M2.0–2.9
68
M1.0–1.9
147
Activity Summary
284
Total earthquakes
~250
Daily average
Normal
Activity level
7
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
6.2
88 km SSE of Adak, Alaska
14:53 UTC · 17.0 km deep
Felt by 7
6.2
124 km SSE of Burica, Panama
14:50 UTC · 10.0 km deep
Felt by 82
5.9
87 km SSE of Adak, Alaska
14:58 UTC · 26.7 km deep
5.0
57 km SSW of Buala, Solomon Islands
19:28 UTC · 10.0 km deep
5.0
88 km SSE of Panguna, Papua New Guinea
17:08 UTC · 83.0 km deep
5.0
85 km SSE of Adak, Alaska
15:03 UTC · 35.0 km deep
5.0
37 km SW of Dalandzadgad, Mongolia
09:33 UTC · 10.0 km deep
4.9
105 km W of Ambunti, Papua New Guinea
05:25 UTC · 110.8 km deep
Earthquake Map — March 21, 2025
All Earthquakes — March 21, 2025
Showing 30 of 137 (filtered from 284)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2025-03-21 2025-03-21 23:48:15 UTC | 4.0md | 65 km NE of Cruz Bay, U.S. Virgin Islands 18.800°, -64.416° | 8.0 km | 5 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.0 earthquake 65 km NE of Cruz Bay, U.S. Virgin Islands came in on March 21, 2025 at 23:48 UTC. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 23:33:29 UTC | 3.4ml | 106 km SSE of Adak, Alaska 51.054°, -175.837° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On March 21, 2025, worldwide seismic activity registered a magnitude 3.4 earthquake 106 km SSE of Adak, Alaska at 23:33 UTC. Coming 9 hours after a magnitude 6.2 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 23:32:39 UTC | 3.2ml | 109 km SSE of Adak, Alaska 50.947°, -176.094° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On March 21, 2025 at 23:32 UTC, a magnitude 3.2 earthquake struck 109 km SSE of Adak, Alaska. It arrived roughly 6 hours after a larger magnitude 4.5 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 21:58:35 UTC | 2.0ml | 50 km SSE of Whites City, New Mexico 31.767°, -104.138° | 6.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 50 km SSE of Whites City, New Mexico on March 21, 2025 at 21:58 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 21:58:22 UTC | 3.5ml | 88 km SW of Atka, Alaska 51.680°, -175.173° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
March 21, 2025 brought a magnitude 3.5 earthquake 88 km SW of Atka, Alaska, logged at 21:58 UTC. The event was offshore. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 21:30:25 UTC | 3.0ml | 109 km SSE of Adak, Alaska 50.942°, -176.150° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.0 earthquake 109 km SSE of Adak, Alaska at 21:30 UTC on March 21, 2025. Coming 4 hours after a magnitude 4.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 21:29:19 UTC | 2.8ml | 112 km SSE of Sand Point, Alaska 54.418°, -159.762° | 14.0 km | - | - | - | ✓ Reviewed | USGS → |
On March 21, 2025, worldwide seismic activity registered a magnitude 2.8 earthquake 112 km SSE of Sand Point, Alaska at 21:29 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 21:24:13 UTC | 4.4mb | South Sandwich Islands region -60.269°, -26.558° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.4 earthquake in the South Sandwich Islands region at 21:24 UTC on March 21, 2025. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 21:20:38 UTC | 3.0ml | 106 km SSE of Adak, Alaska 50.995°, -176.042° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.0 event was detected 106 km SSE of Adak, Alaska on March 21, 2025, with origin time 21:20 UTC. It arrived roughly 6 hours after a larger magnitude 6.2 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 20:55:38 UTC | 2.3ml | 96 km SSE of Adak, Alaska 51.057°, -176.155° | 14.6 km | - | - | - | ✓ Reviewed | USGS → |
March 21, 2025 brought a magnitude 2.3 earthquake 96 km SSE of Adak, Alaska, logged at 20:55 UTC. This event falls inside the aftershock decay of a nearby magnitude 6.2 earthquake that occurred about 6 hours earlier. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 20:50:52 UTC | 2.0ml | 32 km E of McKinney Acres, Texas 32.304°, -102.188° | 8.0 km | - | - | - | ✓ Reviewed | USGS → |
March 21, 2025 brought a magnitude 2.0 earthquake 32 km E of McKinney Acres, Texas, logged at 20:50 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 20:48:20 UTC | 2.0md | 21 km NW of Alder Springs, CA 39.757°, -122.928° | -1.4 km | - | - | - | ✓ Reviewed | USGS → |
On March 21, 2025 at 20:48 UTC, a magnitude 2.0 earthquake struck 21 km NW of Alder Springs, CA. 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. | ||||||||
2025-03-21 2025-03-21 20:46:44 UTC | 2.7ml | 90 km ESE of Adak, Alaska 51.655°, -175.376° | 61.6 km | - | - | - | ✓ Reviewed | USGS → |
At 20:46 UTC on March 21, 2025, a magnitude 2.7 tremor occurred 90 km ESE of Adak, Alaska. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 20:39:22 UTC | 2.2ml | 49 km ENE of Chignik, Alaska 56.532°, -157.718° | 93.3 km | - | - | - | ✓ Reviewed | USGS → |
On March 21, 2025, worldwide seismic activity registered a magnitude 2.2 earthquake 49 km ENE of Chignik, Alaska at 20:39 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 20:36:50 UTC | 4.3mb | 88 km SE of Gorontalo, Indonesia -0.109°, 123.538° | 148.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 seismic event took place 88 km SE of Gorontalo, Indonesia on March 21, 2025 at 20:36 UTC. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 20:35:47 UTC | 2.5ml | 35 km SE of Malaga, New Mexico 32.005°, -103.802° | 7.3 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 seismic event took place 35 km SE of Malaga, New Mexico on March 21, 2025 at 20:35 UTC. Coming 4 hours after a magnitude 2.6 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 20:11:50 UTC | 3.3ml | 84 km SSE of Adak, Alaska 51.156°, -176.231° | 34.8 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.3 earthquake 84 km SSE of Adak, Alaska at 20:11 UTC on March 21, 2025. This event falls inside the aftershock decay of a nearby magnitude 6.2 earthquake that occurred about 5 hours earlier. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 20:05:42 UTC | 2.8ml | 92 km SSE of Adak, Alaska 51.090°, -176.168° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 20:05 UTC on March 21, 2025, a magnitude 2.8 tremor occurred 92 km SSE of Adak, Alaska. Coming 5 hours after a magnitude 6.2 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 20:02:54 UTC | 4.7mb | 158 km NW of Neiafu, Tonga -17.704°, -175.111° | 202.3 km | - | - | - | ✓ Reviewed | USGS → |
March 21, 2025 brought a magnitude 4.7 earthquake 158 km NW of Neiafu, Tonga, logged at 20:02 UTC. The event was offshore. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 19:43:08 UTC | 4.4mb | Kermadec Islands region -31.540°, -178.316° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.4 event was detected in the Kermadec Islands region on March 21, 2025, with origin time 19:43 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 19:42:34 UTC | 4.6mb | 79 km SSE of Adak, Alaska 51.208°, -176.222° | 26.2 km | - | II | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.6 earthquake 79 km SSE of Adak, Alaska with origin time 19:42 UTC on March 21, 2025. It arrived roughly 5 hours after a larger magnitude 6.2 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 19:39:32 UTC | 2.2ml | 81 km SSE of Adak, Alaska 51.203°, -176.169° | 18.3 km | - | - | - | ✓ Reviewed | USGS → |
At 19:39 UTC on March 21, 2025, a magnitude 2.2 tremor occurred 81 km SSE of Adak, Alaska. It arrived roughly 5 hours after a larger magnitude 6.2 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. | ||||||||
2025-03-21 2025-03-21 19:36:41 UTC | 4.7mb | South Sandwich Islands region -55.361°, -28.863° | 14.8 km | - | - | - | ✓ Reviewed | USGS → |
On March 21, 2025 at 19:36 UTC, a magnitude 4.7 earthquake struck in the South Sandwich Islands region. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 19:34:29 UTC | 2.1ml | 100 km SE of Akutan, Alaska 53.605°, -164.536° | 25.6 km | - | - | - | ✓ Reviewed | USGS → |
March 21, 2025 brought a magnitude 2.1 earthquake 100 km SE of Akutan, Alaska, logged at 19:34 UTC. Coming 7 hours after a magnitude 2.2 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. | ||||||||
2025-03-21 2025-03-21 19:32:47 UTC | 2.5md | 15 km SE of Mammoth Lakes, CA 37.544°, -118.859° | 6.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 earthquake was recorded 15 km SE of Mammoth Lakes, CA on March 21, 2025 at 19:32 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 19:28:19 UTC | 5.0mb | 57 km SSW of Buala, Solomon Islands -8.601°, 159.341° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On March 21, 2025, worldwide seismic activity registered a magnitude 5.0 earthquake 57 km SSW of Buala, Solomon Islands at 19:28 UTC. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 19:22:58 UTC | 3.6mb | 74 km SSE of Akutan, Alaska 53.554°, -165.207° | 61.1 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.6 event was detected 74 km SSE of Akutan, Alaska on March 21, 2025, with origin time 19:22 UTC. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 19:16:35 UTC | 3.3ml | 13 km ENE of Wright, Wyoming 43.793°, -105.333° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.3 event was detected 13 km ENE of Wright, Wyoming on March 21, 2025, with origin time 19:16 UTC. 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. | ||||||||
2025-03-21 2025-03-21 18:49:55 UTC | 2.7md | 58 km WNW of Petrolia, CA 40.359°, -124.968° | 11.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.7 earthquake was recorded 58 km WNW of Petrolia, CA on March 21, 2025 at 18:49 UTC. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-03-21 2025-03-21 18:39:20 UTC | 2.1ml | 20 km WSW of Chignik Lake, Alaska 56.207°, -159.077° | 108.5 km | - | - | - | ✓ Reviewed | USGS → |
On March 21, 2025 at 18:39 UTC, a magnitude 2.1 earthquake struck 20 km WSW of Chignik Lake, Alaska. 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 March 21, 2025. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.