Earthquakes on March 28, 2021
279
EARTHQUAKES on March 28, 2021
24-hour UTC period · USGS data
LARGEST: M5.9 — northern Mid-Atlantic Ridge
10 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
2
M4.0–4.9
41
M3.0–3.9
11
M2.0–2.9
51
M1.0–1.9
174
Activity Summary
279
Total earthquakes
~250
Daily average
Normal
Activity level
2
M5.0+ events
Significant Earthquakes (M4.5+)
5.9
northern Mid-Atlantic Ridge
23:01 UTC · 10.0 km deep
5.7
154 km SSE of Tateyama, Japan
00:26 UTC · 40.0 km deep
Felt by 51
4.9
South Shetland Islands
16:27 UTC · 10.0 km deep
4.9
27 km NW of Yonakuni, Japan
06:41 UTC · 98.8 km deep
4.9
southern Mid-Atlantic Ridge
02:48 UTC · 10.0 km deep
4.9
Tonga region
00:32 UTC · 10.0 km deep
4.7
Kermadec Islands region
23:49 UTC · 10.0 km deep
4.7
south of the Fiji Islands
23:08 UTC · 501.3 km deep
Earthquake Map — March 28, 2021
All Earthquakes — March 28, 2021
Showing 30 of 105 (filtered from 279)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-03-28 2021-03-28 23:58:33 UTC | 2.1ml | 11 km SE of Ratliff City, Oklahoma 34.380°, -97.423° | 4.8 km | - | - | - | ✓ Reviewed | USGS → |
On March 28, 2021, worldwide seismic activity registered a magnitude 2.1 earthquake 11 km SE of Ratliff City, Oklahoma at 23:58 UTC. It arrived roughly 2 hours after a larger magnitude 2.2 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 M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 23:49:32 UTC | 4.7mb | Kermadec Islands region -27.779°, -178.478° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.7 event was detected in the Kermadec Islands region on March 28, 2021, with origin time 23:49 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 23:45:37 UTC | 4.6mb | Kermadec Islands region -27.591°, -178.180° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On March 28, 2021 at 23:45 UTC, a magnitude 4.6 earthquake struck in the Kermadec Islands region. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 23:40:05 UTC | 4.6mwr | Off the coast of Aisen, Chile -44.750°, -80.703° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 4.6 earthquake was recorded near Off the coast of Aisen, Chile on March 28, 2021 at 23:40 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 23:26:43 UTC | 4.4mb | Banda Sea -6.381°, 129.532° | 39.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.4 earthquake near Banda Sea with origin time 23:26 UTC on March 28, 2021. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 23:24:48 UTC | 2.0ml | 11 km NNE of Minto, Alaska 65.241°, -149.223° | 16.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 11 km NNE of Minto, Alaska on March 28, 2021 at 23:24 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 23:23:25 UTC | 3.2ml | 42 km NNE of Chase, Alaska 62.773°, -149.671° | 71.0 km | 1 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.2 earthquake 42 km NNE of Chase, Alaska at 23:23 UTC on March 28, 2021. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 23:13:23 UTC | 2.1ml | 5 km N of Ames, Oklahoma 36.297°, -98.177° | 7.8 km | - | - | - | ✓ Reviewed | USGS → |
On March 28, 2021 at 23:13 UTC, a magnitude 2.1 earthquake struck 5 km N of Ames, Oklahoma. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 23:08:36 UTC | 4.7mb | south of the Fiji Islands -26.746°, 179.767° | 501.3 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.7 earthquake south of the Fiji Islands came in on March 28, 2021 at 23:08 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 23:01:46 UTC | 5.9mww | northern Mid-Atlantic Ridge 43.696°, -28.809° | 10.0 km | - | - | green | ✓ Reviewed | USGS → |
On March 28, 2021 at 23:01 UTC, a magnitude 5.9 earthquake struck near northern Mid-Atlantic Ridge. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. It is the largest earthquake currently listed for worldwide seismic activity on March 28, 2021. See the M5.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 22:44:10 UTC | 4.5mb | Kermadec Islands region -28.614°, -177.522° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 seismic event took place in the Kermadec Islands region on March 28, 2021 at 22:44 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 22:34:06 UTC | 2.0ml | 7 km N of Ames, Oklahoma 36.315°, -98.178° | 6.5 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 7 km N of Ames, Oklahoma on March 28, 2021, with origin time 22:34 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 22:29:30 UTC | 4.2mb | Kermadec Islands region -28.112°, -178.345° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 22:29 UTC on March 28, 2021, a magnitude 4.2 tremor occurred in the Kermadec Islands region. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 22:24:09 UTC | 4.3mb | 138 km N of Jayapura, Indonesia -1.280°, 140.786° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.3 event was detected 138 km N of Jayapura, Indonesia on March 28, 2021, with origin time 22:24 UTC. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 22:15:12 UTC | 4.3mb | Fiji region -20.050°, -178.442° | 573.5 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.3 earthquake in the Fiji region came in on March 28, 2021 at 22:15 UTC. 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. | ||||||||
2021-03-28 2021-03-28 21:55:24 UTC | 4.3mb | 69 km WNW of San Antonio de los Cobres, Argentina -24.069°, -66.983° | 196.4 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 seismic event took place 69 km WNW of San Antonio de los Cobres, Argentina on March 28, 2021 at 21:55 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 21:46:23 UTC | 2.2ml | 11 km SE of Ratliff City, Oklahoma 34.390°, -97.409° | 3.5 km | - | - | - | ✓ Reviewed | USGS → |
On March 28, 2021 at 21:46 UTC, a magnitude 2.2 earthquake struck 11 km SE of Ratliff City, Oklahoma. 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. | ||||||||
2021-03-28 2021-03-28 21:24:10 UTC | 2.4ml | 13 km NNE of Sparwood, Canada 49.853°, -114.828° | -2.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.4 earthquake 13 km NNE of Sparwood, Canada came in on March 28, 2021 at 21:24 UTC. This is the shallowest earthquake in the current dataset — a shallow crustal event. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 21:14:35 UTC | 2.0ml | 0 km SW of Quinton, Oklahoma 35.121°, -95.373° | 7.3 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.0 earthquake 0 km SW of Quinton, Oklahoma at 21:14 UTC on March 28, 2021. 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 M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 20:55:50 UTC | 2.4ml | 1 km ENE of P?hala, Hawaii 19.206°, -155.462° | 36.5 km | - | - | - | Auto | USGS → |
Seismographs logged a magnitude 2.4 earthquake 1 km ENE of P?hala, Hawaii with origin time 20:55 UTC on March 28, 2021. It arrived roughly 8 hours after a larger magnitude 2.6 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. | ||||||||
2021-03-28 2021-03-28 20:52:18 UTC | 2.0md | 2 km SW of Indios, Puerto Rico 17.974°, -66.836° | 17.0 km | - | - | - | ✓ Reviewed | USGS → |
At 20:52 UTC on March 28, 2021, a magnitude 2.0 tremor occurred 2 km SW of Indios, Puerto Rico. This event falls inside the aftershock decay of a nearby magnitude 3.0 earthquake that occurred about 1 hours earlier. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 20:49:12 UTC | 2.0ml | 50 km E of Port Alsworth, Alaska 60.163°, -153.410° | 147.8 km | - | - | - | ✓ Reviewed | USGS → |
March 28, 2021 brought a magnitude 2.0 earthquake 50 km E of Port Alsworth, Alaska, logged at 20:49 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 20:35:14 UTC | 2.6ml | 17 km E of Wright, Wyoming 43.751°, -105.276° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
On March 28, 2021 at 20:35 UTC, a magnitude 2.6 earthquake struck 17 km E of Wright, Wyoming. It arrived roughly 1 hours after a larger magnitude 3.4 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 M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 20:01:44 UTC | 3.0md | 4 km SSW of Indios, Puerto Rico 17.954°, -66.838° | 14.0 km | 1 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.0 earthquake 4 km SSW of Indios, Puerto Rico with origin time 20:01 UTC on March 28, 2021. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 20:00:57 UTC | 3.4ml | 19 km NE of Wright, Wyoming 43.865°, -105.316° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
On March 28, 2021, worldwide seismic activity registered a magnitude 3.4 earthquake 19 km NE of Wright, Wyoming at 20:00 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 19:51:30 UTC | 3.1ml | Unimak Island region, Alaska 53.652°, -164.816° | 65.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.1 seismic event took place in the Unimak Island region, Alaska on March 28, 2021 at 19:51 UTC. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 18:58:28 UTC | 2.0ml | 0 km E of Quinton, Oklahoma 35.123°, -95.366° | 6.4 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.0 earthquake 0 km E of Quinton, Oklahoma came in on March 28, 2021 at 18:58 UTC. In the 72 hours after this event, the USGS recorded 6 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 18:54:03 UTC | 2.1md | 4 km NE of P?hala, Hawaii 19.226°, -155.448° | 32.8 km | - | - | - | Auto | USGS → |
The USGS recorded this magnitude 2.1 earthquake 4 km NE of P?hala, Hawaii at 18:54 UTC on March 28, 2021. This event falls inside the aftershock decay of a nearby magnitude 2.6 earthquake that occurred about 6 hours earlier. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 18:51:49 UTC | 2.2ml | 3 km N of Minco, Oklahoma 35.347°, -97.937° | 7.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 3 km N of Minco, Oklahoma on March 28, 2021 at 18:51 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-03-28 2021-03-28 18:51:35 UTC | 2.1md | 9km N of Petrolia, CA 40.404°, -124.285° | 27.2 km | - | - | - | ✓ Reviewed | USGS → |
At 18:51 UTC on March 28, 2021, a magnitude 2.1 tremor occurred 9km N of Petrolia, CA. The event was offshore. 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 28, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.