Earthquakes on August 21, 2026
250
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+
6
M4.0–4.9
37
M3.0–3.9
15
M2.0–2.9
46
M1.0–1.9
146
Activity Summary
250
Total earthquakes
~250
Daily average
Normal
Activity level
6
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
5.8
187 km SW of Labuan, Indonesia
17:41 UTC · 9.0 km deep
Felt by 1
5.4
South Sandwich Islands region
13:06 UTC · 152.0 km deep
5.4
148 km SSE of Tateyama, Japan
12:02 UTC · 61.7 km deep
Felt by 9
5.2
19 km W of Jabonga, Philippines
09:12 UTC · 10.0 km deep
Felt by 5
5.1
1 km N of Alegria, Philippines
09:22 UTC · 10.0 km deep
Felt by 1
5.1
south of Tonga
08:12 UTC · 10.0 km deep
4.9
83 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 104 (filtered from 250)
(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 23:56:40 UTC | 2.9ml | 225 km SE of Chiniak, Alaska 56.105°, -149.819° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
August 21, 2026 brought a magnitude 2.9 earthquake 225 km SE of Chiniak, Alaska, logged at 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 → |
Reports of a magnitude 2.1 earthquake 4 km W of Yacolt, Washington came in on August 21, 2026 at 23:42 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. | ||||||||
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 → |
Seismographs logged a magnitude 2.2 earthquake 65 km E of Akutan, Alaska with origin time 22:43 UTC on August 21, 2026. 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 | 4.7mb | 147 km NE of Diego de Almagro, Chile -25.567°, -68.882° | 102.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.7 earthquake was recorded 147 km NE of Diego de Almagro, Chile on August 21, 2026 at 22:26 UTC. 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 22:00:04 UTC | 4.4mb | 112 km S of Vilyuchinsk, Russia 51.917°, 158.349° | 74.7 km | - | - | - | ✓ Reviewed | USGS → |
August 21, 2026 brought a magnitude 4.4 earthquake 112 km S of Vilyuchinsk, Russia, logged 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 21:54:47 UTC | 4.1mb | 26 km S of Tagāb, Afghanistan 34.616°, 69.669° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 21, 2026 at 21:54 UTC, a magnitude 4.1 earthquake struck 26 km S of Tagāb, Afghanistan. The event was offshore. See the M4.1 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 → |
The USGS recorded this magnitude 2.6 earthquake 46 km NW of Beatty, Nevada at 21:53 UTC on August 21, 2026. 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 → |
Seismographs logged a magnitude 2.3 earthquake 15 km ESE of Markleeville, CA with origin time 21:52 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 20:34:02 UTC | 2.2ml | 16 km NE of Milford, Utah 38.511°, -112.889° | 2.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 16 km NE of Milford, Utah on August 21, 2026 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 | 4.9mb | 83 km NNE of Ruteng, Indonesia -7.878°, 120.637° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.9 event was detected 83 km NNE of Ruteng, Indonesia on August 21, 2026, with origin time 20:21 UTC. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 20:00:37 UTC | 3.4mb_lg | 7 km NNW of Edgefield, Louisiana 32.114°, -93.358° | 5.0 km | 78 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.4 earthquake 7 km NNW of Edgefield, Louisiana at 20:00 UTC on August 21, 2026. 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 → |
At 19:51 UTC on August 21, 2026, a magnitude 2.1 tremor occurred 22 km NW of Parkfield, CA. 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 18:51:53 UTC | 2.3ml | 97 km SSE of Akutan, Alaska 53.297°, -165.350° | 17.8 km | - | - | - | ✓ Reviewed | USGS → |
On August 21, 2026, worldwide seismic activity registered a magnitude 2.3 earthquake 97 km SSE of Akutan, Alaska 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 → |
Reports of a magnitude 4.2 earthquake 202 km SW of Labuan, Indonesia came in on August 21, 2026 at 18:40 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.8 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 → |
On August 21, 2026 at 18:37 UTC, a magnitude 2.9 earthquake struck 8 km WNW of Corcoran, CA. 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 → |
At 18:33 UTC on August 21, 2026, a magnitude 2.3 tremor occurred 60 km SSW of Unalaska, Alaska. 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 → |
A magnitude 4.2 seismic event took place 40 km NNE of Labuan Bajo, Indonesia on August 21, 2026 at 18:22 UTC. 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 → |
Seismographs logged a magnitude 4.7 earthquake 197 km SE of Miyakojima, Japan with origin time 18:05 UTC on August 21, 2026. 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 17:41:44 UTC | 5.8mww | 187 km SW of Labuan, Indonesia -7.532°, 104.585° | 9.0 km | 1 | III | green | ✓ Reviewed | USGS → |
On August 21, 2026 at 17:41 UTC, a magnitude 5.8 earthquake struck 187 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 M5.8 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 → |
A magnitude 3.3 earthquake was recorded 10 km ENE of Coso Junction, CA 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 → |
The USGS recorded this magnitude 2.3 earthquake 17 km SE of Clam Gulch, Alaska at 17:15 UTC on August 21, 2026. 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 → |
At 16:45 UTC on August 21, 2026, a magnitude 4.6 tremor occurred 131 km W of Pangai, Tonga. 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 → |
This magnitude 2.0 event was detected 2 km W of Indios, Puerto Rico on August 21, 2026, with origin time 15:22 UTC. 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. | ||||||||
2026-08-21 2026-08-21 15:21:18 UTC | 4.1mb | 178 km W of Neiafu, Tonga -18.460°, -175.658° | 271.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.1 earthquake was recorded 178 km W of Neiafu, Tonga on August 21, 2026 at 15:21 UTC. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 15:16:58 UTC | 3.0ml | 10 km ENE of Coso Junction, CA 36.065°, -117.842° | 2.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.0 seismic event took place 10 km ENE of Coso Junction, CA on August 21, 2026 at 15:16 UTC. In the 72 hours after this event, the USGS recorded 10 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 15:08:31 UTC | 4.4mb | Bonin Islands, Japan region 28.603°, 142.597° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 21, 2026 at 15:08 UTC, a magnitude 4.4 earthquake struck in the Bonin Islands, Japan region. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-21 2026-08-21 14:27:38 UTC | 4.3mb | south of the Fiji Islands -24.521°, 179.862° | 525.1 km | - | - | - | ✓ Reviewed | USGS → |
At 14:27 UTC on August 21, 2026, a magnitude 4.3 tremor occurred south of the Fiji Islands. This event falls inside the aftershock decay of a nearby magnitude 4.5 earthquake that occurred about 1 hours earlier. This is the deepest earthquake in the current dataset — a deep-focus event. 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, 2026. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.