Earthquakes on April 3, 2021
248
EARTHQUAKES on April 3, 2021
24-hour UTC period · USGS data
10 km deep · 3 people felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
3
M4.0–4.9
22
M3.0–3.9
11
M2.0–2.9
50
M1.0–1.9
162
Activity Summary
248
Total earthquakes
~250
Daily average
Normal
Activity level
3
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
6.6
east of the South Sandwich Islands
01:16 UTC · 10.0 km deep
Felt by 3
5.9
158 km S of Ambon, Indonesia
18:42 UTC · 326.0 km deep
5.6
Mid-Indian Ridge
20:26 UTC · 10.0 km deep
4.9
north of Ascension Island
16:43 UTC · 10.0 km deep
4.9
east of the South Sandwich Islands
11:11 UTC · 10.0 km deep
4.9
Kermadec Islands region
01:18 UTC · 10.0 km deep
4.8
87 km W of Palaióchora, Greece
06:10 UTC · 31.7 km deep
Felt by 1
4.6
38 km ESE of ?funato, Japan
12:58 UTC · 41.8 km deep
Earthquake Map — April 3, 2021
All Earthquakes — April 3, 2021
Showing 30 of 86 (filtered from 248)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-04-03 2021-04-03 23:45:40 UTC | 4.4mb | South Sandwich Islands region -56.891°, -25.146° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On April 3, 2021 at 23:45 UTC, a magnitude 4.4 earthquake struck in the South Sandwich Islands region. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 23:42:09 UTC | 2.2ml | 62 km S of Whites City, New Mexico 31.616°, -104.359° | 7.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:42 UTC on April 3, 2021, a magnitude 2.2 tremor occurred 62 km S of Whites City, New Mexico. It arrived roughly 5 hours after a larger magnitude 3.0 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 23:38:59 UTC | 2.0md | 3 km E of P?hala, Hawaii 19.206°, -155.449° | 32.9 km | 2 | - | - | Auto | USGS → |
The USGS recorded this magnitude 2.0 earthquake 3 km E of P?hala, Hawaii at 23:38 UTC on April 3, 2021. It arrived roughly 2 hours after a larger magnitude 4.3 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 23:12:06 UTC | 2.2md | 5km S of San Juan Bautista, CA 36.798°, -121.535° | 7.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.2 earthquake 5km S of San Juan Bautista, CA with origin time 23:12 UTC on April 3, 2021. This event falls inside the aftershock decay of a nearby magnitude 2.8 earthquake that occurred about 16 hours earlier. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 22:58:05 UTC | 2.2md | 6 km SSE of Maria Antonia, Puerto Rico 17.927°, -66.868° | 15.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 6 km SSE of Maria Antonia, Puerto Rico on April 3, 2021 at 22:58 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.0 earthquake that occurred about 23 hours earlier. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 22:47:07 UTC | 2.0md | 2 km E of P?hala, Hawaii 19.205°, -155.458° | 34.5 km | - | - | - | Auto | USGS → |
On April 3, 2021, worldwide seismic activity registered a magnitude 2.0 earthquake 2 km E of P?hala, Hawaii at 22:47 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.3 earthquake that occurred about 2 hours earlier. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 22:41:08 UTC | 2.1md | 16 km SSW of Honoka‘a, Hawaii 19.942°, -155.517° | 35.9 km | - | - | - | ✓ Reviewed | USGS → |
April 3, 2021 brought a magnitude 2.1 earthquake 16 km SSW of Honoka‘a, Hawaii, logged at 22:41 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 22:34:38 UTC | 2.3md | 4 km SSE of P?hala, Hawaii 19.171°, -155.457° | 34.3 km | - | - | - | Auto | USGS → |
A magnitude 2.3 earthquake was recorded 4 km SSE of P?hala, Hawaii on April 3, 2021 at 22:34 UTC. It arrived roughly 1 hours after a larger magnitude 4.3 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 22:20:03 UTC | 2.1ml | 15km NE of Barstow, CA 35.003°, -116.916° | 2.1 km | - | - | - | ✓ Reviewed | USGS → |
April 3, 2021 brought a magnitude 2.1 earthquake 15km NE of Barstow, CA, logged at 22:20 UTC. 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. | ||||||||
2021-04-03 2021-04-03 21:31:10 UTC | 4.4mb | 96 km NE of Los Andes, Chile -32.141°, -69.976° | 106.9 km | 3 | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded 96 km NE of Los Andes, Chile on April 3, 2021 at 21:31 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 21:15:22 UTC | 4.3ml | 5 km NW of P?hala, Hawaii 19.238°, -155.513° | 7.9 km | 156 | IV | green | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.3 earthquake 5 km NW of P?hala, Hawaii with origin time 21:15 UTC on April 3, 2021. In the 72 hours after this event, the USGS recorded 7 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 21:01:55 UTC | 3.9ml | 5 km NNW of P?hala, Hawaii 19.247°, -155.510° | 8.3 km | 20 | IV | green | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.9 earthquake 5 km NNW of P?hala, Hawaii at 21:01 UTC on April 3, 2021. In the 72 hours after this event, the USGS recorded 7 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M3.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 20:47:03 UTC | 3.1ml | 39 km SSW of Nanwalek, Alaska 59.048°, -152.262° | 69.9 km | - | - | - | ✓ Reviewed | USGS → |
On April 3, 2021 at 20:47 UTC, a magnitude 3.1 earthquake struck 39 km SSW of Nanwalek, Alaska. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 20:34:29 UTC | 2.3ml | 6 km ENE of P?hala, Hawaii 19.225°, -155.418° | 33.2 km | - | - | - | Auto | USGS → |
April 3, 2021 brought a magnitude 2.3 earthquake 6 km ENE of P?hala, Hawaii, logged at 20:34 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.4 earthquake that occurred about 10 hours earlier. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 20:26:00 UTC | 5.6mww | Mid-Indian Ridge -8.791°, 67.632° | 10.0 km | - | - | green | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 5.6 earthquake near Mid-Indian Ridge with origin time 20:26 UTC on April 3, 2021. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M5.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 20:05:57 UTC | 4.4mb | 8 km SW of Týrnavos, Greece 39.679°, 22.222° | 13.6 km | 1 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.4 earthquake 8 km SW of Týrnavos, Greece with origin time 20:05 UTC on April 3, 2021. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 19:39:50 UTC | 2.3ml | 1 km N of Quinton, Oklahoma 35.138°, -95.369° | 6.9 km | - | - | - | ✓ Reviewed | USGS → |
On April 3, 2021 at 19:39 UTC, a magnitude 2.3 earthquake struck 1 km N of Quinton, Oklahoma. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 19:30:02 UTC | 2.0ml | 8 km SW of Milford, Utah 38.335°, -113.075° | 2.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 8 km SW of Milford, Utah on April 3, 2021 at 19:30 UTC. 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. | ||||||||
2021-04-03 2021-04-03 19:00:24 UTC | 2.1ml | 13 km SSW of Falls City, Texas 28.879°, -98.092° | 6.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 13 km SSW of Falls City, Texas on April 3, 2021 at 19:00 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 18:51:14 UTC | 3.0ml | 10 km SE of Wright, Wyoming 43.684°, -105.395° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.0 earthquake was recorded 10 km SE of Wright, Wyoming on April 3, 2021 at 18:51 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. | ||||||||
2021-04-03 2021-04-03 18:42:01 UTC | 5.9mww | 158 km S of Ambon, Indonesia -5.125°, 128.156° | 326.0 km | - | II | green | ✓ Reviewed | USGS → |
A magnitude 5.9 earthquake was recorded 158 km S of Ambon, Indonesia on April 3, 2021 at 18:42 UTC. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M5.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 18:39:16 UTC | 2.5ml | 8 km WNW of Skwentna, Alaska 62.018°, -151.558° | 92.0 km | 1 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.5 earthquake 8 km WNW of Skwentna, Alaska at 18:39 UTC on April 3, 2021. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 18:14:54 UTC | 3.0ml | 58 km S of Whites City, New Mexico 31.650°, -104.458° | 6.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.0 earthquake 58 km S of Whites City, New Mexico with origin time 18:14 UTC on April 3, 2021. The event was offshore. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 18:04:08 UTC | 2.0ml | 94 km SSE of Sand Point, Alaska 54.589°, -159.802° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 94 km SSE of Sand Point, Alaska on April 3, 2021, with origin time 18:04 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.0 earthquake that occurred about 12 hours earlier. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 17:59:00 UTC | 4.5mb | 29 km S of Puerto Ángel, Mexico 15.405°, -96.444° | 12.7 km | 2 | - | - | ✓ Reviewed | USGS → |
April 3, 2021 brought a magnitude 4.5 earthquake 29 km S of Puerto Ángel, Mexico, logged at 17:59 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 17:30:12 UTC | 2.2ml | 54 km NW of Toyah, Texas 31.609°, -104.251° | 6.7 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.2 earthquake 54 km NW of Toyah, Texas at 17:30 UTC on April 3, 2021. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 16:54:15 UTC | 2.8ml | 101 km SSW of False Pass, Alaska 53.999°, -163.938° | 22.8 km | - | - | - | ✓ Reviewed | USGS → |
April 3, 2021 brought a magnitude 2.8 earthquake 101 km SSW of False Pass, Alaska, logged at 16:54 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 16:43:42 UTC | 4.9mb | north of Ascension Island -3.404°, -12.137° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On April 3, 2021, worldwide seismic activity registered a magnitude 4.9 earthquake north of Ascension Island at 16:43 UTC. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 15:34:23 UTC | 4.4mb | 238 km ENE of Levuka, Fiji -17.625°, -178.482° | 579.1 km | - | - | - | ✓ Reviewed | USGS → |
On April 3, 2021, worldwide seismic activity registered a magnitude 4.4 earthquake 238 km ENE of Levuka, Fiji at 15:34 UTC. This is the deepest earthquake in the current dataset — a deep-focus event. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-03 2021-04-03 15:28:11 UTC | 4.4mb | Volcano Islands, Japan region 22.527°, 141.938° | 266.0 km | - | - | - | ✓ Reviewed | USGS → |
At 15:28 UTC on April 3, 2021, a magnitude 4.4 tremor occurred in the Volcano Islands, Japan region. 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 April 3, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.