Earthquakes on August 15, 2021
324
EARTHQUAKES on August 15, 2021
24-hour UTC period · USGS data
8 km deep · 12 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
17
M4.0–4.9
94
M3.0–3.9
11
M2.0–2.9
60
M1.0–1.9
142
Activity Summary
324
Total earthquakes
~250
Daily average
Elevated
Activity level
17
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
5.8
15 km NNE of Chardonnière, Haiti
03:20 UTC · 8.3 km deep
Felt by 12
5.4
South Sandwich Islands region
16:34 UTC · 10.0 km deep
5.4
South Sandwich Islands region
10:31 UTC · 30.4 km deep
5.4
72 km WSW of Alianza Cristiana, Peru
05:40 UTC · 96.4 km deep
Felt by 5
5.2
South Sandwich Islands region
22:30 UTC · 19.7 km deep
5.2
South Sandwich Islands region
21:38 UTC · 68.5 km deep
5.2
40 km ESE of Chubek, Tajikistan
10:41 UTC · 8.7 km deep
Felt by 1
5.1
South Sandwich Islands region
19:00 UTC · 38.3 km deep
Earthquake Map — August 15, 2021
All Earthquakes — August 15, 2021
Showing 30 of 182 (filtered from 324)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2021-08-15 2021-08-15 23:44:45 UTC | 4.5mb | South Sandwich Islands region -60.148°, -27.455° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
August 15, 2021 brought a magnitude 4.5 earthquake in the South Sandwich Islands region, logged at 23:44 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 23:41:49 UTC | 2.0ml | 5 km WSW of Junction, Utah 38.224°, -112.281° | 8.8 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.0 earthquake 5 km WSW of Junction, Utah at 23:41 UTC on August 15, 2021. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 23:32:19 UTC | 4.1mb | 108 km SSW of Uyuni, Bolivia -21.388°, -67.171° | 191.7 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.1 event was detected 108 km SSW of Uyuni, Bolivia on August 15, 2021, with origin time 23:32 UTC. This is the deepest earthquake in the current dataset — an intermediate depth event. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 23:26:54 UTC | 5.0mb | 50 km SW of Novaya Chara, Russia 56.487°, 117.728° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 5.0 earthquake was recorded 50 km SW of Novaya Chara, Russia on August 15, 2021 at 23:26 UTC. The event was offshore. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 23:19:13 UTC | 4.1mb | 12 km SW of Metsavan, Armenia 41.121°, 44.120° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.1 earthquake 12 km SW of Metsavan, Armenia came in on August 15, 2021 at 23:19 UTC. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 22:53:12 UTC | 2.2ml | 27 km WNW of Petersville, Alaska 62.546°, -151.288° | 89.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.2 earthquake 27 km WNW of Petersville, Alaska came in on August 15, 2021 at 22:53 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 22:48:43 UTC | 4.4mb | 2 km WSW of Petit Trou de Nippes, Haiti 18.516°, -73.527° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 15, 2021 at 22:48 UTC, a magnitude 4.4 earthquake struck 2 km WSW of Petit Trou de Nippes, Haiti. It arrived roughly 20 hours after a larger magnitude 5.1 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 22:47:08 UTC | 4.1mb | South Sandwich Islands region -57.977°, -23.411° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.1 seismic event took place in the South Sandwich Islands region on August 15, 2021 at 22:47 UTC. Coming 22 hours after a magnitude 4.8 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 22:30:43 UTC | 5.2mww | South Sandwich Islands region -58.508°, -25.148° | 19.7 km | - | - | - | ✓ Reviewed | USGS → |
At 22:30 UTC on August 15, 2021, a magnitude 5.2 tremor occurred in the South Sandwich Islands region. See the M5.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 22:21:04 UTC | 4.4mb | South Sandwich Islands region -57.084°, -24.953° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded in the South Sandwich Islands region on August 15, 2021 at 22:21 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.7 earthquake that occurred about 8 hours earlier. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 22:19:16 UTC | 2.1ml | 87 km SE of Sand Point, Alaska 54.707°, -159.693° | 23.6 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.1 earthquake 87 km SE of Sand Point, Alaska came in on August 15, 2021 at 22:19 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.6 earthquake that occurred about 15 hours earlier. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 22:10:12 UTC | 2.8md | 3 km S of Magas Arriba, Puerto Rico 17.983°, -66.774° | 11.0 km | - | - | - | ✓ Reviewed | USGS → |
At 22:10 UTC on August 15, 2021, a magnitude 2.8 tremor occurred 3 km S of Magas Arriba, Puerto Rico. This event falls inside the aftershock decay of a nearby magnitude 4.1 earthquake that occurred about 19 hours earlier. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 22:00:26 UTC | 2.5ml | 36 km NNE of Karluk, Alaska 57.892°, -154.319° | 54.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 earthquake was recorded 36 km NNE of Karluk, Alaska on August 15, 2021 at 22:00 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 21:58:19 UTC | 4.5mb | South Sandwich Islands region -58.071°, -24.346° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 15, 2021 at 21:58 UTC, a magnitude 4.5 earthquake struck in the South Sandwich Islands region. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 21:38:28 UTC | 5.2mb | South Sandwich Islands region -59.524°, -26.378° | 68.5 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 5.2 earthquake in the South Sandwich Islands region at 21:38 UTC on August 15, 2021. See the M5.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 21:38:27 UTC | 3.6md | 53 km SE of Punta Cana, Dominican Republic 18.281°, -68.003° | 103.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.6 earthquake was recorded 53 km SE of Punta Cana, Dominican Republic on August 15, 2021 at 21:38 UTC. The event was offshore. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 21:34:42 UTC | 2.0ml | 3 km ENE of P?hala, Hawaii 19.215°, -155.447° | 38.2 km | - | - | - | Auto | USGS → |
On August 15, 2021, worldwide seismic activity registered a magnitude 2.0 earthquake 3 km ENE of P?hala, Hawaii at 21:34 UTC. Coming 8 hours after a magnitude 2.3 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 21:30:40 UTC | 4.4mb | South Sandwich Islands region -59.600°, -25.978° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.4 earthquake in the South Sandwich Islands region with origin time 21:30 UTC on August 15, 2021. Coming 2 hours after a magnitude 4.7 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. | ||||||||
2021-08-15 2021-08-15 21:20:28 UTC | 4.3mb | South Sandwich Islands region -57.239°, -24.580° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 15, 2021, worldwide seismic activity registered a magnitude 4.3 earthquake in the South Sandwich Islands region at 21:20 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 21:18:25 UTC | 2.3ml | 17 km NW of Happy Valley, Alaska 60.038°, -151.999° | 82.9 km | - | - | - | ✓ Reviewed | USGS → |
On August 15, 2021 at 21:18 UTC, a magnitude 2.3 earthquake struck 17 km NW of Happy Valley, Alaska. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 21:13:32 UTC | 4.3mb | South Sandwich Islands region -57.308°, -24.796° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
At 21:13 UTC on August 15, 2021, a magnitude 4.3 tremor occurred in the South Sandwich Islands region. Coming 7 hours after a magnitude 4.7 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 21:12:55 UTC | 2.3ml | 4 km S of Princeton, Canada 49.414°, -120.509° | -0.4 km | - | - | - | ✓ Reviewed | USGS → |
On August 15, 2021, worldwide seismic activity registered a magnitude 2.3 earthquake 4 km S of Princeton, Canada at 21:12 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 21:02:27 UTC | 4.8mb | 56 km NNW of Sola, Vanuatu -13.383°, 167.433° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.8 seismic event took place 56 km NNW of Sola, Vanuatu on August 15, 2021 at 21:02 UTC. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 20:03:13 UTC | 4.3mb | 11 km NE of Nagahama, Japan 35.452°, 136.364° | 10.0 km | 14 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.3 earthquake 11 km NE of Nagahama, Japan at 20:03 UTC on August 15, 2021. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 19:46:43 UTC | 4.0mb | 11 km N of Saint-Louis du Sud, Haiti 18.365°, -73.529° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.0 event was detected 11 km N of Saint-Louis du Sud, Haiti on August 15, 2021, with origin time 19:46 UTC. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 19:44:31 UTC | 2.6ml | 243 km SE of Chignik, Alaska 54.520°, -156.144° | 17.2 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.6 event was detected 243 km SE of Chignik, Alaska on August 15, 2021, with origin time 19:44 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 19:43:02 UTC | 4.7mb | South Sandwich Islands region -59.596°, -26.020° | 16.7 km | - | - | - | ✓ Reviewed | USGS → |
At 19:43 UTC on August 15, 2021, a magnitude 4.7 tremor occurred in the South Sandwich Islands region. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 19:30:21 UTC | 2.1ml | 44 km NW of Toyah, Texas 31.616°, -104.104° | 7.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 44 km NW of Toyah, Texas on August 15, 2021 at 19:30 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 19:21:48 UTC | 4.5mb | Mid-Indian Ridge -20.488°, 67.999° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 earthquake was recorded near Mid-Indian Ridge on August 15, 2021 at 19:21 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2021-08-15 2021-08-15 19:20:58 UTC | 2.3ml | 4 km SE of P?hala, Hawaii 19.170°, -155.454° | 0.2 km | - | - | - | Auto | USGS → |
At 19:20 UTC on August 15, 2021, a magnitude 2.3 tremor occurred 4 km SE of P?hala, Hawaii. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.3 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 15, 2021. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.