Earthquakes on August 21, 2026
268
EARTHQUAKES on August 21, 2026
24-hour UTC period · USGS data
9 km deep · 1 person felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
7
M4.0–4.9
53
M3.0–3.9
15
M2.0–2.9
47
M1.0–1.9
146
Activity Summary
268
Total earthquakes
~250
Daily average
Normal
Activity level
7
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
5.7
191 km SW of Labuan, Indonesia
17:41 UTC · 9.0 km deep
Felt by 1
5.4
South Sandwich Islands region
13:06 UTC · 152.9 km deep
5.3
148 km SSE of Tateyama, Japan
12:02 UTC · 70.7 km deep
Felt by 9
5.1
11 km S of Cantapoy, Philippines
09:22 UTC · 10.0 km deep
Felt by 1
5.1
14 km W of Jabonga, Philippines
09:12 UTC · 10.0 km deep
Felt by 5
5.1
south of Tonga
08:12 UTC · 10.0 km deep
5.0
77 km NNE of Ruteng, Indonesia
20:21 UTC · 10.0 km deep
4.9
87 km N of Ruteng, Indonesia
17:06 UTC · 10.0 km deep
Earthquake Map — August 21, 2026
All Earthquakes — August 21, 2026
Showing 30 of 122 (filtered from 268)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2026-08-21 2026-08-21 23:56:41 UTC | 2.9ml | 223 km SE of Chiniak, Alaska 56.116°, -149.837° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.9 event was detected 223 km SE of Chiniak, Alaska on August 21, 2026, with origin time 23:56 UTC. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 23:42:55 UTC | 2.1ml | 4 km W of Yacolt, Washington 45.863°, -122.463° | -0.6 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.1 earthquake 4 km W of Yacolt, Washington at 23:42 UTC on August 21, 2026. 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. | ||||||||
2026-08-21 2026-08-21 22:43:42 UTC | 2.2ml | 65 km E of Akutan, Alaska 54.053°, -164.788° | 73.6 km | - | - | - | ✓ Reviewed | USGS → |
On August 21, 2026 at 22:43 UTC, a magnitude 2.2 earthquake struck 65 km E of Akutan, Alaska. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 22:26:03 UTC | 4.6mwr | 142 km NE of Diego de Almagro, Chile -25.520°, -68.992° | 112.1 km | - | - | - | ✓ Reviewed | USGS → |
At 22:26 UTC on August 21, 2026, a magnitude 4.6 tremor occurred 142 km NE of Diego de Almagro, Chile. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 22:00:03 UTC | 4.4mb | 112 km S of Vilyuchinsk, Russia 51.921°, 158.513° | 69.5 km | - | - | - | ✓ Reviewed | USGS → |
On August 21, 2026, worldwide seismic activity registered a magnitude 4.4 earthquake 112 km S of Vilyuchinsk, Russia at 22:00 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 21:55:20 UTC | 4.3mb | Pulau Pulau Tanimbar, Indonesia -7.803°, 130.065° | 26.9 km | - | - | - | ✓ Reviewed | USGS → |
August 21, 2026 brought a magnitude 4.3 earthquake near Pulau Pulau Tanimbar, Indonesia, logged at 21:55 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 21:54:47 UTC | 4.2mb | 28 km S of Tagāb, Afghanistan 34.601°, 69.667° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.2 seismic event took place 28 km S of Tagāb, Afghanistan on August 21, 2026 at 21:54 UTC. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 21:53:51 UTC | 2.6ml | 46 km NW of Beatty, Nevada 37.214°, -117.120° | 8.3 km | - | - | - | ✓ Reviewed | USGS → |
At 21:53 UTC on August 21, 2026, a magnitude 2.6 tremor occurred 46 km NW of Beatty, Nevada. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 21:52:30 UTC | 2.3md | 15 km ESE of Markleeville, CA 38.620°, -119.654° | 4.1 km | - | - | - | ✓ Reviewed | USGS → |
On August 21, 2026 at 21:52 UTC, a magnitude 2.3 earthquake struck 15 km ESE of Markleeville, CA. 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. | ||||||||
2026-08-21 2026-08-21 20:34:02 UTC | 2.2ml | 16 km NE of Milford, Utah 38.511°, -112.889° | 2.3 km | - | - | - | ✓ Reviewed | USGS → |
August 21, 2026 brought a magnitude 2.2 earthquake 16 km NE of Milford, Utah, logged at 20:34 UTC. 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. | ||||||||
2026-08-21 2026-08-21 20:21:53 UTC | 5.0mb | 77 km NNE of Ruteng, Indonesia -7.926°, 120.613° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 5.0 event was detected 77 km NNE of Ruteng, Indonesia on August 21, 2026, with origin time 20:21 UTC. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 20:00:51 UTC | 4.0mb | 67 km NNE of Ruteng, Indonesia -8.056°, 120.724° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
August 21, 2026 brought a magnitude 4.0 earthquake 67 km NNE of Ruteng, Indonesia, logged at 20:00 UTC. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 20:00:36 UTC | 3.4mb | 0 km NNE of Edgefield, Louisiana 32.053°, -93.332° | 9.5 km | 78 | - | - | ✓ Reviewed | USGS → |
A magnitude 3.4 earthquake was recorded 0 km NNE of Edgefield, Louisiana on August 21, 2026 at 20:00 UTC. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 19:51:35 UTC | 2.1md | 22 km NW of Parkfield, CA 36.038°, -120.597° | 4.4 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.1 earthquake 22 km NW of Parkfield, CA with origin time 19:51 UTC on August 21, 2026. 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. | ||||||||
2026-08-21 2026-08-21 19:28:59 UTC | 4.3mb | 196 km SSE of Vilyuchinsk, Russia 51.388°, 159.817° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 21, 2026 at 19:28 UTC, a magnitude 4.3 earthquake struck 196 km SSE of Vilyuchinsk, Russia. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 18:51:53 UTC | 2.3ml | 97 km SSE of Akutan, Alaska 53.297°, -165.350° | 17.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 earthquake was recorded 97 km SSE of Akutan, Alaska on August 21, 2026 at 18:51 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.5 earthquake that occurred about 17 hours earlier. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 18:40:30 UTC | 4.2mb | 202 km SW of Labuan, Indonesia -7.681°, 104.540° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
August 21, 2026 brought a magnitude 4.2 earthquake 202 km SW of Labuan, Indonesia, logged at 18:40 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.7 earthquake that occurred about 1 hours earlier. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 18:37:42 UTC | 2.9md | 8 km WNW of Corcoran, CA 36.132°, -119.645° | 26.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 seismic event took place 8 km WNW of Corcoran, CA on August 21, 2026 at 18:37 UTC. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 18:33:41 UTC | 2.3ml | 60 km SSW of Unalaska, Alaska 53.403°, -166.982° | 2.4 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.3 earthquake 60 km SSW of Unalaska, Alaska with origin time 18:33 UTC on August 21, 2026. 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. | ||||||||
2026-08-21 2026-08-21 18:22:32 UTC | 4.2mb | 40 km NNE of Labuan Bajo, Indonesia -8.157°, 120.037° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 21, 2026 at 18:22 UTC, a magnitude 4.2 earthquake struck 40 km NNE of Labuan Bajo, Indonesia. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 18:05:20 UTC | 4.7mb | 197 km SE of Miyakojima, Japan 23.703°, 126.854° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 21, 2026 at 18:05 UTC, a magnitude 4.7 earthquake struck 197 km SE of Miyakojima, Japan. The event was offshore. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 17:58:08 UTC | 3.2ml | 10 km ESE of Wright, Wyoming 43.708°, -105.382° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.2 seismic event took place 10 km ESE of Wright, Wyoming on August 21, 2026 at 17:58 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 17:41:44 UTC | 5.7mww | 191 km SW of Labuan, Indonesia -7.558°, 104.564° | 9.0 km | 1 | III | green | ✓ Reviewed | USGS → |
On August 21, 2026 at 17:41 UTC, a magnitude 5.7 earthquake struck 191 km SW of Labuan, Indonesia. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. It is the largest earthquake currently listed for worldwide seismic activity on August 21, 2026. See the M5.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 17:26:17 UTC | 3.3ml | 10 km ENE of Coso Junction, CA 36.069°, -117.842° | 2.5 km | 3 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.3 earthquake 10 km ENE of Coso Junction, CA came in on August 21, 2026 at 17:26 UTC. In the 72 hours after this event, the USGS recorded 7 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 17:15:15 UTC | 2.3ml | 17 km SE of Clam Gulch, Alaska 60.125°, -151.173° | 67.7 km | 1 | - | - | ✓ Reviewed | USGS → |
On August 21, 2026, worldwide seismic activity registered a magnitude 2.3 earthquake 17 km SE of Clam Gulch, Alaska at 17:15 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 17:06:37 UTC | 4.9mb | 87 km N of Ruteng, Indonesia -7.821°, 120.419° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.9 earthquake 87 km N of Ruteng, Indonesia came in on August 21, 2026 at 17:06 UTC. The event was offshore. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 16:45:36 UTC | 4.6mb | 131 km W of Pangai, Tonga -19.622°, -175.596° | 272.9 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.6 earthquake 131 km W of Pangai, Tonga at 16:45 UTC on August 21, 2026. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 16:05:29 UTC | 4.5mb | 32 km WNW of Ruteng, Indonesia -8.483°, 120.197° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
On August 21, 2026, worldwide seismic activity registered a magnitude 4.5 earthquake 32 km WNW of Ruteng, Indonesia at 16:05 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 15:49:25 UTC | 4.5mb | southern East Pacific Rise -35.340°, -105.578° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 15:49 UTC on August 21, 2026, a magnitude 4.5 tremor occurred near southern East Pacific Rise. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 15:22:51 UTC | 2.0md | 2 km W of Indios, Puerto Rico 17.998°, -66.845° | 10.3 km | - | - | - | ✓ Reviewed | USGS → |
At 15:22 UTC on August 21, 2026, a magnitude 2.0 tremor occurred 2 km W of Indios, Puerto Rico. It arrived roughly 10 hours after a larger magnitude 2.1 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. | ||||||||
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, 2026. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.