Earthquakes on April 20, 2021
297
EARTHQUAKES on April 20, 2021
24-hour UTC period · USGS data
LARGEST: M5.3 — West Chile Rise
10 km deep · 1 person felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
2
M4.0–4.9
36
M3.0–3.9
17
M2.0–2.9
55
M1.0–1.9
187
Activity Summary
297
Total earthquakes
~250
Daily average
Normal
Activity level
2
M5.0+ events
Significant Earthquakes (M4.5+)
5.3
West Chile Rise
02:26 UTC · 10.0 km deep
Felt by 1
5.0
Mariana Islands region
20:01 UTC · 10.0 km deep
4.9
9 km S of Chilca, Peru
04:53 UTC · 44.6 km deep
Felt by 73
4.9
South Sandwich Islands region
00:43 UTC · 59.1 km deep
4.8
9 km ENE of Komoro, Japan
17:39 UTC · 169.3 km deep
Felt by 3
4.7
Kermadec Islands region
10:24 UTC · 10.0 km deep
4.7
13 km ESE of Claver, Philippines
08:30 UTC · 82.8 km deep
4.7
282 km WSW of Tual, Indonesia
01:35 UTC · 106.4 km deep
Earthquake Map — April 20, 2021
All Earthquakes — April 20, 2021
Showing 30 of 110 (filtered from 297)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-04-20 2021-04-20 23:57:44 UTC | 2.2ml | 57 km WNW of Elfin Cove, Alaska 58.469°, -137.179° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
April 20, 2021 brought a magnitude 2.2 earthquake 57 km WNW of Elfin Cove, Alaska, logged at 23:57 UTC. Coming 14 hours after a magnitude 2.3 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 M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 23:07:30 UTC | 3.1md | 5 km ESE of La Parguera, Puerto Rico 17.956°, -67.002° | 7.0 km | 1 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.1 earthquake 5 km ESE of La Parguera, Puerto Rico with origin time 23:07 UTC on April 20, 2021. This event falls inside the aftershock decay of a nearby magnitude 3.6 earthquake that occurred about 11 hours earlier. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 23:01:29 UTC | 2.1md | 20 km WSW of Naturita, Colorado 38.167°, -108.794° | 31.5 km | - | - | - | ✓ Reviewed | USGS → |
At 23:01 UTC on April 20, 2021, a magnitude 2.1 tremor occurred 20 km WSW of Naturita, Colorado. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 22:12:49 UTC | 2.1ml | 89 km SSE of Sand Point, Alaska 54.608°, -159.899° | 6.2 km | - | - | - | ✓ Reviewed | USGS → |
On April 20, 2021 at 22:12 UTC, a magnitude 2.1 earthquake struck 89 km SSE of Sand Point, Alaska. This event falls inside the aftershock decay of a nearby magnitude 2.6 earthquake that occurred about 11 hours earlier. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 21:40:38 UTC | 2.3md | 7km W of Cobb, CA 38.832°, -122.807° | 2.3 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.3 earthquake 7km W of Cobb, CA at 21:40 UTC on April 20, 2021. In the 72 hours after this event, the USGS recorded 5 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 21:26:43 UTC | 4.2mb | 227 km WNW of Kangding, China 30.611°, 99.703° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 21:26 UTC on April 20, 2021, a magnitude 4.2 tremor occurred 227 km WNW of Kangding, China. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 21:17:28 UTC | 2.1ml | 3 km ENE of P?hala, Hawaii 19.210°, -155.446° | 33.7 km | 1 | - | - | Auto | USGS → |
The USGS recorded this magnitude 2.1 earthquake 3 km ENE of P?hala, Hawaii at 21:17 UTC on April 20, 2021. It arrived roughly 1 hours after a larger magnitude 2.8 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. | ||||||||
2021-04-20 2021-04-20 21:15:40 UTC | 3.0ml | 3 km NNW of Dubrava, Croatia 45.862°, 16.047° | 13.9 km | 22 | - | - | ✓ Reviewed | USGS → |
On April 20, 2021, worldwide seismic activity registered a magnitude 3.0 earthquake 3 km NNW of Dubrava, Croatia at 21:15 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 21:13:45 UTC | 4.4mb | Mariana Islands region 21.424°, 146.119° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 21:13 UTC on April 20, 2021, a magnitude 4.4 tremor occurred in the Mariana Islands region. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 21:08:23 UTC | 2.8md | 6 km E of P?hala, Hawaii 19.214°, -155.414° | 35.0 km | 4 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.8 event was detected 6 km E of P?hala, Hawaii on April 20, 2021, with origin time 21:08 UTC. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 21:02:02 UTC | 2.4ml | 1 km WNW of Quinton, Oklahoma 35.127°, -95.381° | 7.3 km | - | - | - | ✓ Reviewed | USGS → |
On April 20, 2021, worldwide seismic activity registered a magnitude 2.4 earthquake 1 km WNW of Quinton, Oklahoma at 21:02 UTC. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 20:21:38 UTC | 4.2mb | Mariana Islands region 17.537°, 147.332° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.2 earthquake in the Mariana Islands region at 20:21 UTC on April 20, 2021. This event falls inside the aftershock decay of a nearby magnitude 5.0 earthquake that occurred about 1 hours earlier. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 20:11:27 UTC | 2.5ml | 57 km S of Whites City, New Mexico 31.661°, -104.360° | 6.4 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.5 earthquake 57 km S of Whites City, New Mexico with origin time 20:11 UTC on April 20, 2021. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 20:10:12 UTC | 2.3ml | 56 km S of Whites City, New Mexico 31.665°, -104.364° | 6.8 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.3 event was detected 56 km S of Whites City, New Mexico on April 20, 2021, with origin time 20:10 UTC. Coming 11 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 M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 20:06:31 UTC | 3.5ml | 13 km E of Wright, Wyoming 43.770°, -105.327° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
On April 20, 2021, worldwide seismic activity registered a magnitude 3.5 earthquake 13 km E of Wright, Wyoming at 20:06 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 20:01:27 UTC | 5.0mb | Mariana Islands region 17.573°, 147.391° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 5.0 earthquake was recorded in the Mariana Islands region on April 20, 2021 at 20:01 UTC. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 19:58:04 UTC | 3.4ml | 46 km SSW of Ivanof Bay, Alaska 55.515°, -159.755° | 65.4 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.4 earthquake 46 km SSW of Ivanof Bay, Alaska at 19:58 UTC on April 20, 2021. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 19:50:33 UTC | 4.2mb | 126 km SSW of Sofifi, Indonesia -0.378°, 127.286° | 16.1 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.2 event was detected 126 km SSW of Sofifi, Indonesia on April 20, 2021, with origin time 19:50 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 19:39:04 UTC | 2.0md | 2 km ESE of Friendsville, Tennessee 35.751°, -84.111° | 17.7 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 2 km ESE of Friendsville, Tennessee on April 20, 2021 at 19:39 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 19:34:12 UTC | 3.0ml | 22 km SSW of Hualien City, Taiwan 23.781°, 121.531° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
At 19:34 UTC on April 20, 2021, a magnitude 3.0 tremor occurred 22 km SSW of Hualien City, Taiwan. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 19:28:14 UTC | 2.4ml | 56 km S of Whites City, New Mexico 31.671°, -104.367° | 7.6 km | - | - | - | ✓ Reviewed | USGS → |
April 20, 2021 brought a magnitude 2.4 earthquake 56 km S of Whites City, New Mexico, logged at 19:28 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.5 earthquake that occurred about 10 hours earlier. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 19:23:15 UTC | 4.6mb | 294 km ESE of Yigo Village, Guam 12.282°, 147.282° | 10.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.6 seismic event took place 294 km ESE of Yigo Village, Guam on April 20, 2021 at 19:23 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 19:21:07 UTC | 4.5mb | south of the Fiji Islands -24.131°, -179.677° | 492.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.5 earthquake south of the Fiji Islands with origin time 19:21 UTC on April 20, 2021. 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. | ||||||||
2021-04-20 2021-04-20 19:03:17 UTC | 2.2ml | 49 km SE of Ugashik, Alaska 57.172°, -156.880° | 106.7 km | - | - | - | ✓ Reviewed | USGS → |
On April 20, 2021 at 19:03 UTC, a magnitude 2.2 earthquake struck 49 km SE of Ugashik, Alaska. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 18:58:28 UTC | 2.8ml | 4 km NNW of Gillette, Wyoming 44.332°, -105.520° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.8 seismic event took place 4 km NNW of Gillette, Wyoming on April 20, 2021 at 18:58 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 18:55:13 UTC | 2.4ml | 2km E of Commerce, CA 33.997°, -118.134° | 17.7 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.4 earthquake 2km E of Commerce, CA with origin time 18:55 UTC on April 20, 2021. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 18:16:46 UTC | 4.4mb | 74 km W of Tobelo, Indonesia 1.681°, 127.346° | 132.5 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.4 earthquake 74 km W of Tobelo, Indonesia at 18:16 UTC on April 20, 2021. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 17:57:13 UTC | 2.4ml | 23 km NW of Stanley, Idaho 44.354°, -115.169° | 11.4 km | - | - | - | ✓ Reviewed | USGS → |
On April 20, 2021 at 17:57 UTC, a magnitude 2.4 earthquake struck 23 km NW of Stanley, Idaho. Coming 5 hours after a magnitude 2.7 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 17:55:28 UTC | 4.3mb | 4 km NNW of Bandar-e Gen?veh, Iran 29.619°, 50.501° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
April 20, 2021 brought a magnitude 4.3 earthquake 4 km NNW of Bandar-e Gen?veh, Iran, logged at 17:55 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-04-20 2021-04-20 17:39:58 UTC | 4.8mb | 9 km ENE of Komoro, Japan 36.337°, 138.533° | 169.3 km | 3 | - | - | ✓ Reviewed | USGS → |
At 17:39 UTC on April 20, 2021, a magnitude 4.8 tremor occurred 9 km ENE of Komoro, Japan. See the M4.8 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 20, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.