Earthquakes on August 21, 2020
367
EARTHQUAKES on August 21, 2020
24-hour UTC period · USGS data
624 km deep · 38 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
1
M4.0–4.9
34
M3.0–3.9
9
M2.0–2.9
74
M1.0–1.9
249
Activity Summary
367
Total earthquakes
~250
Daily average
Elevated
Activity level
1
M5.0+ events
Geographic Breakdown
Top Countries (International)
Significant Earthquakes (M4.5+)
6.9
222 km SSE of Katabu, Indonesia
04:09 UTC · 624.0 km deep
Felt by 38
4.9
10 km NNW of Namuac, Philippines
13:41 UTC · 53.4 km deep
4.9
44 km NW of Fais, Micronesia
12:35 UTC · 10.0 km deep
4.9
238 km NE of Maumere, Indonesia
04:42 UTC · 632.9 km deep
Felt by 1
4.8
116 km ESE of Honiara, Solomon Islands
23:12 UTC · 50.6 km deep
4.8
Easter Island region
01:39 UTC · 10.0 km deep
4.8
248 km NE of Saipan, Northern Mariana Islands
00:30 UTC · 35.0 km deep
4.7
136 km SSW of Merizo Village, Guam
18:17 UTC · 10.0 km deep
Earthquake Map — August 21, 2020
All Earthquakes — August 21, 2020
Showing 30 of 118 (filtered from 367)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2020-08-21 2020-08-21 23:40:53 UTC | 2.8ml | 16 km SSE of Wright, Wyoming 43.622°, -105.380° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.8 event was detected 16 km SSE of Wright, Wyoming on August 21, 2020, with origin time 23:40 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. | ||||||||
2020-08-21 2020-08-21 23:40:32 UTC | 2.1md | 2km NW of The Geysers, CA 38.791°, -122.775° | 3.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 2km NW of The Geysers, CA on August 21, 2020, with origin time 23:40 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.1 earthquake that occurred about 3 hours earlier. 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. | ||||||||
2020-08-21 2020-08-21 23:24:17 UTC | 4.0mb | 25 km NNE of Karakenja, Tajikistan 39.458°, 71.584° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 21, 2020 at 23:24 UTC, a magnitude 4.0 earthquake struck 25 km NNE of Karakenja, Tajikistan. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 23:18:40 UTC | 2.6ml | 24 km WNW of Stanley, Idaho 44.270°, -115.237° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
On August 21, 2020, worldwide seismic activity registered a magnitude 2.6 earthquake 24 km WNW of Stanley, Idaho at 23:18 UTC. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 23:14:19 UTC | 2.8md | 6 km WSW of Guánica, Puerto Rico 17.948°, -66.963° | 6.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.8 earthquake 6 km WSW of Guánica, Puerto Rico came in on August 21, 2020 at 23:14 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 23:12:50 UTC | 2.5md | 6 km WSW of Guánica, Puerto Rico 17.938°, -66.963° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 seismic event took place 6 km WSW of Guánica, Puerto Rico on August 21, 2020 at 23:12 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.6 earthquake that occurred about 1 hours earlier. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 23:12:33 UTC | 4.8mb | 116 km ESE of Honiara, Solomon Islands -10.008°, 160.838° | 50.6 km | - | - | - | ✓ Reviewed | USGS → |
At 23:12 UTC on August 21, 2020, a magnitude 4.8 tremor occurred 116 km ESE of Honiara, Solomon Islands. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 23:09:24 UTC | 2.6md | 2 km NW of Indios, Puerto Rico 18.006°, -66.838° | 13.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.6 earthquake 2 km NW of Indios, Puerto Rico with origin time 23:09 UTC on August 21, 2020. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 23:05:09 UTC | 4.3mb | 38 km SSW of Sola, Vanuatu -14.201°, 167.412° | 195.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.3 earthquake 38 km SSW of Sola, Vanuatu came in on August 21, 2020 at 23:05 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 23:01:27 UTC | 2.4ml | 14 km W of Stanley, Idaho 44.208°, -115.120° | 8.8 km | - | - | - | ✓ Reviewed | USGS → |
At 23:01 UTC on August 21, 2020, a magnitude 2.4 tremor occurred 14 km W of Stanley, Idaho. Coming 9 hours after a magnitude 2.4 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. | ||||||||
2020-08-21 2020-08-21 22:56:18 UTC | 2.5md | 2 km WNW of Indios, Puerto Rico 18.006°, -66.839° | 13.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.5 event was detected 2 km WNW of Indios, Puerto Rico on August 21, 2020, with origin time 22:56 UTC. It arrived roughly 11 hours after a larger magnitude 2.5 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 22:55:09 UTC | 3.2mwr | 2 km SSE of Detroit Beach, Michigan 41.913°, -83.318° | 9.2 km | 2,157 | III | - | ✓ Reviewed | USGS → |
August 21, 2020 brought a magnitude 3.2 earthquake 2 km SSE of Detroit Beach, Michigan, logged at 22:55 UTC. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 22:30:13 UTC | 4.1mb | Fiji region -21.917°, -179.611° | 582.7 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.1 earthquake in the Fiji region with origin time 22:30 UTC on August 21, 2020. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 21:50:07 UTC | 4.4mb | 37 km SE of Bobon, Philippines 6.624°, 126.564° | 59.4 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.4 earthquake 37 km SE of Bobon, Philippines with origin time 21:50 UTC on August 21, 2020. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 21:31:29 UTC | 2.1ml | 7 km E of P?hala, Hawaii 19.192°, -155.413° | 32.3 km | - | - | - | Auto | USGS → |
A magnitude 2.1 seismic event took place 7 km E of P?hala, Hawaii on August 21, 2020 at 21:31 UTC. Coming 13 hours after a magnitude 2.3 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. | ||||||||
2020-08-21 2020-08-21 21:19:20 UTC | 4.1mb | 264 km WNW of Haveluloto, Tonga -20.626°, -177.697° | 495.2 km | - | - | - | ✓ Reviewed | USGS → |
On August 21, 2020, worldwide seismic activity registered a magnitude 4.1 earthquake 264 km WNW of Haveluloto, Tonga at 21:19 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 21:08:37 UTC | 2.1md | 5km NW of The Geysers, CA 38.803°, -122.801° | 1.0 km | - | - | - | ✓ Reviewed | USGS → |
August 21, 2020 brought a magnitude 2.1 earthquake 5km NW of The Geysers, CA, logged at 21:08 UTC. 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 M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 21:06:57 UTC | 2.3md | 2 km ESE of P?hala, Hawaii 19.197°, -155.453° | 34.3 km | - | - | - | Auto | USGS → |
At 21:06 UTC on August 21, 2020, a magnitude 2.3 tremor occurred 2 km ESE of P?hala, Hawaii. It arrived roughly 12 hours after a larger magnitude 2.3 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. | ||||||||
2020-08-21 2020-08-21 20:57:43 UTC | 2.6ml | 75 km S of Sand Point, Alaska 54.658°, -160.628° | 23.0 km | - | - | - | ✓ Reviewed | USGS → |
At 20:57 UTC on August 21, 2020, a magnitude 2.6 tremor occurred 75 km S of Sand Point, Alaska. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 20:52:32 UTC | 2.6ml | 169 km ESE of Akutan, Alaska 53.322°, -163.611° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.6 earthquake 169 km ESE of Akutan, Alaska at 20:52 UTC on August 21, 2020. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 20:36:37 UTC | 4.1mb | 27 km NNE of Mutsu, Japan 41.530°, 141.316° | 103.2 km | - | - | - | ✓ Reviewed | USGS → |
At 20:36 UTC on August 21, 2020, a magnitude 4.1 tremor occurred 27 km NNE of Mutsu, Japan. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 20:32:16 UTC | 2.8ml | Rat Islands, Aleutian Islands, Alaska 51.768°, 177.912° | 152.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.8 seismic event took place near Rat Islands, Aleutian Islands, Alaska on August 21, 2020 at 20:32 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 20:26:20 UTC | 2.0ml | 34 km NNW of Valdez, Alaska 61.426°, -146.514° | 12.8 km | - | - | - | ✓ Reviewed | USGS → |
On August 21, 2020, worldwide seismic activity registered a magnitude 2.0 earthquake 34 km NNW of Valdez, Alaska at 20:26 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 19:55:10 UTC | 3.6mb | 80 km SSW of Sand Point, Alaska 54.718°, -161.155° | 29.5 km | 1 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.6 earthquake 80 km SSW of Sand Point, Alaska came in on August 21, 2020 at 19:55 UTC. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 19:50:13 UTC | 2.8ml | 12 km SSE of Volcano, Hawaii 19.335°, -155.193° | 6.7 km | - | - | - | ✓ Reviewed | USGS → |
At 19:50 UTC on August 21, 2020, a magnitude 2.8 tremor occurred 12 km SSE of Volcano, Hawaii. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 19:49:34 UTC | 2.6ml | 30 km W of Mentone, Texas 31.751°, -103.920° | 6.4 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.6 event was detected 30 km W of Mentone, Texas on August 21, 2020, with origin time 19:49 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 19:36:35 UTC | 4.4mb | 5 km SW of San Miguel del Puerto, Mexico 15.882°, -96.207° | 10.0 km | 2 | - | - | ✓ Reviewed | USGS → |
On August 21, 2020, worldwide seismic activity registered a magnitude 4.4 earthquake 5 km SW of San Miguel del Puerto, Mexico at 19:36 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 19:24:19 UTC | 2.2ml | 18 km WNW of Fishhook, Alaska 61.815°, -149.556° | 37.9 km | - | - | - | ✓ Reviewed | USGS → |
August 21, 2020 brought a magnitude 2.2 earthquake 18 km WNW of Fishhook, Alaska, logged at 19:24 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 19:10:19 UTC | 4.0ml | 75 km SE of Perryville, Alaska 55.449°, -158.269° | 10.8 km | - | II | green | ✓ Reviewed | USGS → |
A magnitude 4.0 earthquake was recorded 75 km SE of Perryville, Alaska on August 21, 2020 at 19:10 UTC. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-21 2020-08-21 19:01:01 UTC | 4.3mb | 145 km WSW of Bengkulu, Indonesia -4.270°, 101.044° | 18.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 seismic event took place 145 km WSW of Bengkulu, Indonesia on August 21, 2020 at 19:01 UTC. See the M4.3 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 August 21, 2020. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.