Time ↓	Mag ↕	Location ↕	Depth ↕	Felt ↕	MMI	Alert	Status	Details
2021-08-17 2021-08-17 23:58:18 UTC	4.5mb	South Sandwich Islands region -57.028°, -25.295°	35.0 km	-	-	-	✓ Reviewed	USGS →
On August 17, 2021 at 23:58 UTC, a magnitude 4.5 earthquake struck in the South Sandwich Islands region. It arrived roughly 16 hours after a larger magnitude 4.6 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.
2021-08-17 2021-08-17 23:22:15 UTC	4.3mb	265 km E of Levuka, Fiji -18.138°, -178.180°	548.8 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 4.3 earthquake 265 km E of Levuka, Fiji at 23:22 UTC on August 17, 2021. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 23:13:13 UTC	2.1ml	128 km SW of Adak, Alaska 51.158°, -178.088°	25.6 km	-	-	-	✓ Reviewed	USGS →
On August 17, 2021 at 23:13 UTC, a magnitude 2.1 earthquake struck 128 km SW of Adak, Alaska. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 23:03:57 UTC	2.5ml	102 km SSE of False Pass, Alaska 53.961°, -163.032°	32.4 km	-	-	-	✓ Reviewed	USGS →
At 23:03 UTC on August 17, 2021, a magnitude 2.5 tremor occurred 102 km SSE of False Pass, Alaska. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 22:59:27 UTC	2.5ml	60 km ENE of Savoonga, Alaska 63.855°, -169.302°	23.7 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 2.5 earthquake 60 km ENE of Savoonga, Alaska at 22:59 UTC on August 17, 2021. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 22:57:43 UTC	4.2mb	51 km SW of Jiquilillo, Nicaragua 12.373°, -87.738°	66.5 km	-	-	-	✓ Reviewed	USGS →
On August 17, 2021, worldwide seismic activity registered a magnitude 4.2 earthquake 51 km SW of Jiquilillo, Nicaragua at 22:57 UTC. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 22:52:59 UTC	4.2mb	South Sandwich Islands region -57.966°, -25.661°	43.4 km	-	-	-	✓ Reviewed	USGS →
At 22:52 UTC on August 17, 2021, a magnitude 4.2 tremor occurred in the South Sandwich Islands region. Coming 5 hours after a magnitude 6.1 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.
2021-08-17 2021-08-17 22:45:59 UTC	2.8ml	145 km SE of Perryville, Alaska 54.977°, -157.528°	20.6 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.8 earthquake was recorded 145 km SE of Perryville, Alaska on August 17, 2021 at 22:45 UTC. Coming 1 hours after a magnitude 3.0 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 22:35:01 UTC	4.4mb	South Sandwich Islands region -57.173°, -25.214°	35.2 km	-	-	-	✓ Reviewed	USGS →
This magnitude 4.4 event was detected in the South Sandwich Islands region on August 17, 2021, with origin time 22:35 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.6 earthquake that occurred about 15 hours earlier. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 22:24:07 UTC	2.0ml	37 km ESE of Malaga, New Mexico 32.072°, -103.717°	7.4 km	-	-	-	✓ Reviewed	USGS →
On August 17, 2021, worldwide seismic activity registered a magnitude 2.0 earthquake 37 km ESE of Malaga, New Mexico at 22:24 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 22:22:30 UTC	3.0ml	138 km SE of Perryville, Alaska 55.053°, -157.564°	5.2 km	-	-	-	✓ Reviewed	USGS →
At 22:22 UTC on August 17, 2021, a magnitude 3.0 tremor occurred 138 km SE of Perryville, Alaska. The event was offshore. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 22:21:22 UTC	4.4mb	South Sandwich Islands region -57.162°, -25.040°	10.0 km	-	-	-	✓ Reviewed	USGS →
Reports of a magnitude 4.4 earthquake in the South Sandwich Islands region came in on August 17, 2021 at 22:21 UTC. Coming 12 hours after a magnitude 4.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 22:18:12 UTC	4.6mb	South Sandwich Islands region -58.749°, -24.886°	10.0 km	-	-	-	✓ Reviewed	USGS →
August 17, 2021 brought a magnitude 4.6 earthquake in the South Sandwich Islands region, logged at 22:18 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.9 earthquake that occurred about 14 hours earlier. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 22:07:55 UTC	4.4mb	South Sandwich Islands region -58.875°, -24.715°	10.0 km	-	-	-	✓ Reviewed	USGS →
A magnitude 4.4 seismic event took place in the South Sandwich Islands region on August 17, 2021 at 22:07 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 21:57:10 UTC	2.0ml	56 km S of Whites City, New Mexico 31.667°, -104.394°	6.2 km	-	-	-	✓ Reviewed	USGS →
At 21:57 UTC on August 17, 2021, a magnitude 2.0 tremor occurred 56 km S of Whites City, New Mexico. This event falls inside the aftershock decay of a nearby magnitude 2.7 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.
2021-08-17 2021-08-17 21:47:43 UTC	5.0mb	South Sandwich Islands region -59.408°, -25.306°	10.0 km	-	-	-	✓ Reviewed	USGS →
This magnitude 5.0 event was detected in the South Sandwich Islands region on August 17, 2021, with origin time 21:47 UTC. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 21:46:15 UTC	4.4mb	South Sandwich Islands region -60.297°, -24.023°	10.0 km	-	-	-	✓ Reviewed	USGS →
August 17, 2021 brought a magnitude 4.4 earthquake in the South Sandwich Islands region, logged at 21:46 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 21:16:36 UTC	2.0ml	3 km E of P?hala, Hawaii 19.206°, -155.449°	34.5 km	-	-	-	Auto	USGS →
A magnitude 2.0 earthquake was recorded 3 km E of P?hala, Hawaii on August 17, 2021 at 21:16 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.2 earthquake that occurred about 21 hours earlier. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 21:14:22 UTC	2.9md	9km SW of Tres Pinos, CA 36.731°, -121.394°	3.0 km	8	-	-	✓ Reviewed	USGS →
On August 17, 2021 at 21:14 UTC, a magnitude 2.9 earthquake struck 9km SW of Tres Pinos, CA. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 21:13:05 UTC	2.0ml	3 km E of P?hala, Hawaii 19.208°, -155.446°	35.6 km	-	-	-	Auto	USGS →
On August 17, 2021 at 21:13 UTC, a magnitude 2.0 earthquake struck 3 km E of P?hala, Hawaii. It arrived roughly 21 hours after a larger magnitude 2.2 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.
2021-08-17 2021-08-17 20:52:31 UTC	2.7ml	55 km S of Whites City, New Mexico 31.674°, -104.401°	7.3 km	-	-	-	✓ Reviewed	USGS →
At 20:52 UTC on August 17, 2021, a magnitude 2.7 tremor occurred 55 km S of Whites City, New Mexico. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 20:47:30 UTC	4.7mb	southern Mid-Atlantic Ridge -14.126°, -13.652°	10.0 km	-	-	-	✓ Reviewed	USGS →
The USGS recorded this magnitude 4.7 earthquake near southern Mid-Atlantic Ridge at 20:47 UTC on August 17, 2021. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 20:42:20 UTC	4.9mb	South Sandwich Islands region -59.572°, -26.280°	91.2 km	-	-	-	✓ Reviewed	USGS →
Reports of a magnitude 4.9 earthquake in the South Sandwich Islands region came in on August 17, 2021 at 20:42 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.5 earthquake that occurred about 1 hours earlier. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 20:20:11 UTC	4.6mb	90 km ENE of Nagqu, China 31.904°, 92.872°	10.0 km	-	-	-	✓ Reviewed	USGS →
On August 17, 2021 at 20:20 UTC, a magnitude 4.6 earthquake struck 90 km ENE of Nagqu, China. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 20:19:45 UTC	5.2mb	South Sandwich Islands region -59.605°, -26.157°	33.7 km	-	-	-	✓ Reviewed	USGS →
At 20:19 UTC on August 17, 2021, a magnitude 5.2 tremor occurred in the South Sandwich Islands region. This event falls inside the aftershock decay of a nearby magnitude 5.5 earthquake that occurred about 1 hours earlier. See the M5.2 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 20:16:05 UTC	3.7ml	209 km SE of Perryville, Alaska 54.610°, -156.753°	25.5 km	-	I	-	✓ Reviewed	USGS →
Reports of a magnitude 3.7 earthquake 209 km SE of Perryville, Alaska came in on August 17, 2021 at 20:16 UTC. The event was offshore. See the M3.7 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 20:15:11 UTC	4.6mb	South Sandwich Islands region -57.889°, -25.112°	56.3 km	-	-	-	✓ Reviewed	USGS →
A magnitude 4.6 earthquake was recorded in the South Sandwich Islands region on August 17, 2021 at 20:15 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 20:06:22 UTC	2.1md	15 km SSE of Sunnyside, Utah 39.429°, -110.305°	-1.7 km	-	-	-	✓ Reviewed	USGS →
A magnitude 2.1 seismic event took place 15 km SSE of Sunnyside, Utah on August 17, 2021 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 M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 20:06:13 UTC	5.5mww	South Sandwich Islands region -59.632°, -26.183°	41.5 km	-	III	green	✓ Reviewed	USGS →
On August 17, 2021, worldwide seismic activity registered a magnitude 5.5 earthquake in the South Sandwich Islands region at 20:06 UTC. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M5.5 event page for the full report, ShakeMap, and citizen-reported intensity data.
2021-08-17 2021-08-17 20:02:29 UTC	3.3ml	3 km NNE of Wright, Wyoming 43.782°, -105.483°	0.0 km	-	-	-	✓ Reviewed	USGS →
A magnitude 3.3 seismic event took place 3 km NNE of Wright, Wyoming on August 17, 2021 at 20:02 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.3 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 17, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.

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