Earthquakes on August 22, 2021
420
EARTHQUAKES on August 22, 2021
24-hour UTC period · USGS data
LARGEST: M7.1 — South Sandwich Islands region
6 km deep · 2 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
8
M4.0–4.9
69
M3.0–3.9
16
M2.0–2.9
93
M1.0–1.9
234
Activity Summary
420
Total earthquakes
~250
Daily average
Elevated
Activity level
8
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
7.1
South Sandwich Islands region
21:33 UTC · 6.0 km deep
Felt by 2
6.6
South Sandwich Islands region
00:45 UTC · 7.0 km deep
Felt by 1
5.7
South Sandwich Islands region
15:21 UTC · 21.0 km deep
5.3
69 km E of Namie, Japan
02:24 UTC · 57.0 km deep
Felt by 6
5.1
South Sandwich Islands region
03:37 UTC · 10.0 km deep
5.0
South Sandwich Islands region
22:30 UTC · 10.0 km deep
5.0
South Sandwich Islands region
19:20 UTC · 74.2 km deep
5.0
18 km ENE of San Fernando, Peru
08:28 UTC · 158.5 km deep
Felt by 2
Earthquake Map — August 22, 2021
All Earthquakes — August 22, 2021
Showing 30 of 186 (filtered from 420)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-08-22 2021-08-22 23:58:19 UTC | 4.4mb | 143 km ESE of Pondaguitan, Philippines 5.916°, 127.393° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 22, 2021, worldwide seismic activity registered a magnitude 4.4 earthquake 143 km ESE of Pondaguitan, Philippines at 23:58 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 23:55:17 UTC | 4.6mb | 46 km NNW of Yigo Village, Guam 13.931°, 144.732° | 154.5 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.6 earthquake 46 km NNW of Yigo Village, Guam came in on August 22, 2021 at 23:55 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 23:47:54 UTC | 4.2mb | South Sandwich Islands region -60.162°, -24.947° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.2 earthquake in the South Sandwich Islands region at 23:47 UTC on August 22, 2021. Coming 2 hours after a magnitude 7.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 23:43:41 UTC | 4.3mb | South Sandwich Islands region -59.914°, -23.571° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:43 UTC on August 22, 2021, a magnitude 4.3 tremor occurred in the South Sandwich Islands region. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 23:38:40 UTC | 4.5mb | South Sandwich Islands region -60.270°, -24.909° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.5 earthquake in the South Sandwich Islands region came in on August 22, 2021 at 23:38 UTC. It arrived roughly 2 hours after a larger magnitude 7.1 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 23:28:56 UTC | 4.6mb | South Sandwich Islands region -58.302°, -25.048° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.6 seismic event took place in the South Sandwich Islands region on August 22, 2021 at 23:28 UTC. It arrived roughly 8 hours after a larger magnitude 5.7 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. | ||||||||
2021-08-22 2021-08-22 23:27:12 UTC | 4.5mb | 10 km NNE of Baradères, Haiti 18.576°, -73.617° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 seismic event took place 10 km NNE of Baradères, Haiti on August 22, 2021 at 23:27 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 23:26:09 UTC | 2.0md | 3 km WSW of P?hala, Hawaii 19.198°, -155.507° | 34.9 km | - | - | - | Auto | USGS → |
A magnitude 2.0 seismic event took place 3 km WSW of P?hala, Hawaii on August 22, 2021 at 23:26 UTC. It arrived roughly 1 hours after a larger magnitude 2.7 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 23:21:38 UTC | 2.7ml | 8 km ENE of P?hala, Hawaii 19.220°, -155.400° | 32.8 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.7 earthquake 8 km ENE of P?hala, Hawaii came in on August 22, 2021 at 23:21 UTC. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 23:04:20 UTC | 4.5mb | South Sandwich Islands region -60.573°, -25.305° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
August 22, 2021 brought a magnitude 4.5 earthquake in the South Sandwich Islands region, logged at 23:04 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 23:02:39 UTC | 2.5md | 29km SE of Markleeville, CA 38.531°, -119.534° | 3.0 km | 1 | - | - | ✓ Reviewed | USGS → |
On August 22, 2021 at 23:02 UTC, a magnitude 2.5 earthquake struck 29km SE of Markleeville, CA. It arrived roughly 19 hours after a larger magnitude 3.1 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 M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 23:02:30 UTC | 3.6mb | 96 km SSE of Nikolski, Alaska 52.113°, -168.450° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.6 seismic event took place 96 km SSE of Nikolski, Alaska on August 22, 2021 at 23:02 UTC. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 23:02:06 UTC | 2.2md | 2 km WSW of P?hala, Hawaii 19.195°, -155.501° | 35.3 km | - | - | - | Auto | USGS → |
A magnitude 2.2 earthquake was recorded 2 km WSW of P?hala, Hawaii on August 22, 2021 at 23:02 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.6 earthquake that occurred about 12 hours earlier. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 23:00:23 UTC | 4.7mb | South Sandwich Islands region -60.333°, -24.847° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:00 UTC on August 22, 2021, a magnitude 4.7 tremor occurred in the South Sandwich Islands region. Coming 1 hours after a magnitude 7.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 22:52:39 UTC | 4.6mb | South Sandwich Islands region -60.388°, -24.850° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
August 22, 2021 brought a magnitude 4.6 earthquake in the South Sandwich Islands region, logged at 22:52 UTC. This event falls inside the aftershock decay of a nearby magnitude 7.1 earthquake that occurred about 1 hours earlier. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 22:49:27 UTC | 2.1ml | 1 km S of P?hala, Hawaii 19.193°, -155.480° | 30.3 km | - | - | - | Auto | USGS → |
Reports of a magnitude 2.1 earthquake 1 km S of P?hala, Hawaii came in on August 22, 2021 at 22:49 UTC. Coming 12 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 M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 22:48:15 UTC | 2.1ml | 28 km NE of Beluga, Alaska 61.302°, -150.680° | 48.9 km | - | - | - | ✓ Reviewed | USGS → |
On August 22, 2021 at 22:48 UTC, a magnitude 2.1 earthquake struck 28 km NE of Beluga, Alaska. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 22:48:00 UTC | 2.4ml | 156 km SSE of Chignik, Alaska 55.092°, -157.105° | 29.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 seismic event took place 156 km SSE of Chignik, Alaska on August 22, 2021 at 22:48 UTC. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 22:46:22 UTC | 4.1mb | 106 km W of Riverton, New Zealand -46.270°, 166.639° | 123.1 km | - | - | - | ✓ Reviewed | USGS → |
On August 22, 2021 at 22:46 UTC, a magnitude 4.1 earthquake struck 106 km W of Riverton, New Zealand. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 22:45:47 UTC | 4.5mb | South Sandwich Islands region -58.249°, -25.680° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 22, 2021 at 22:45 UTC, a magnitude 4.5 earthquake struck in the South Sandwich Islands region. It arrived roughly 9 hours after a larger magnitude 4.9 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 22:39:08 UTC | 4.4mb | 135 km NNW of Kendari, Indonesia -2.822°, 122.120° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 22:39 UTC on August 22, 2021, a magnitude 4.4 tremor occurred 135 km NNW of Kendari, Indonesia. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 22:30:55 UTC | 5.0mb | South Sandwich Islands region -60.340°, -24.787° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 5.0 earthquake in the South Sandwich Islands region at 22:30 UTC on August 22, 2021. Coming 1 hours after a magnitude 7.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 22:27:48 UTC | 4.4mb | 115 km SE of D?r?b, Iran 28.130°, 55.481° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.4 earthquake 115 km SE of D?r?b, Iran at 22:27 UTC on August 22, 2021. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 22:18:17 UTC | 4.5mb | South Sandwich Islands region -60.977°, -25.934° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 earthquake was recorded in the South Sandwich Islands region on August 22, 2021 at 22:18 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 22:17:56 UTC | 4.3mb | 89 km SSE of Lakatoro, Vanuatu -16.870°, 167.669° | 37.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.3 earthquake 89 km SSE of Lakatoro, Vanuatu at 22:17 UTC on August 22, 2021. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 22:17:08 UTC | 4.1mb | 157 km ESE of Attu Station, Alaska 52.079°, 175.126° | 64.9 km | - | I | - | ✓ Reviewed | USGS → |
A magnitude 4.1 earthquake was recorded 157 km ESE of Attu Station, Alaska on August 22, 2021 at 22:17 UTC. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 21:54:31 UTC | 4.4mb | South Sandwich Islands region -60.309°, -25.053° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.4 event was detected in the South Sandwich Islands region on August 22, 2021, with origin time 21:54 UTC. This event falls inside the aftershock decay of a nearby magnitude 7.1 earthquake that occurred about 1 hours earlier. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 21:51:12 UTC | 2.2ml | 80 km SSE of Perryville, Alaska 55.250°, -158.616° | 25.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.2 earthquake 80 km SSE of Perryville, Alaska at 21:51 UTC on August 22, 2021. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 21:39:14 UTC | 2.0ml | 8 km NE of Badger, Alaska 64.844°, -147.386° | 15.2 km | 1 | - | - | ✓ Reviewed | USGS → |
At 21:39 UTC on August 22, 2021, a magnitude 2.0 tremor occurred 8 km NE of Badger, Alaska. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-22 2021-08-22 21:34:33 UTC | 2.8ml | 68 km SW of Tanana, Alaska 64.691°, -152.992° | 5.7 km | - | - | - | Auto | USGS → |
A magnitude 2.8 seismic event took place 68 km SW of Tanana, Alaska on August 22, 2021 at 21:34 UTC. The event was offshore. See the M2.8 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 August 22, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.