Earthquakes on August 21, 2026
266
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
52
M3.0–3.9
14
M2.0–2.9
47
M1.0–1.9
146
Activity Summary
266
Total earthquakes
~250
Daily average
Normal
Activity level
7
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
153 km SSE of Tateyama, Japan
12:02 UTC · 65.5 km deep
Felt by 9
5.2
14 km WSW of Jabonga, Philippines
09:12 UTC · 10.0 km deep
Felt by 5
5.1
11 km S of Cantapoy, Philippines
09:22 UTC · 10.0 km deep
Felt by 1
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 120 (filtered from 266)
(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 → |
At 23:56 UTC on August 21, 2026, a magnitude 2.9 tremor occurred 223 km SE of Chiniak, Alaska. 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 → |
On August 21, 2026, worldwide seismic activity registered a magnitude 2.1 earthquake 4 km W of Yacolt, Washington 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 → |
A magnitude 2.2 seismic event took place 65 km E of Akutan, Alaska on August 21, 2026 at 22:43 UTC. 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 | 148 km NE of Diego de Almagro, Chile -25.560°, -68.885° | 105.5 km | - | - | - | ✓ Reviewed | USGS → |
On August 21, 2026 at 22:26 UTC, a magnitude 4.7 earthquake struck 148 km NE of Diego de Almagro, Chile. 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 22:00:03 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 21:55:19 UTC | 4.3mb | Pulau Pulau Tanimbar, Indonesia -7.734°, 130.077° | 27.8 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 → |
Seismographs logged a magnitude 2.6 earthquake 46 km NW of Beatty, Nevada with origin time 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 → |
A magnitude 2.3 seismic event took place 15 km ESE of Markleeville, CA on August 21, 2026 at 21:52 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. | ||||||||
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 → |
Reports of a magnitude 2.2 earthquake 16 km NE of Milford, Utah came in 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 | 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 → |
A magnitude 4.0 seismic event took place 67 km NNE of Ruteng, Indonesia on August 21, 2026 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_lg | 2 km WNW of Coushatta, Louisiana 32.022°, -93.367° | 8.1 km | 78 | - | - | ✓ Reviewed | USGS → |
On August 21, 2026 at 20:00 UTC, a magnitude 3.4 earthquake struck 2 km WNW of Coushatta, Louisiana. 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 → |
On August 21, 2026 at 19:51 UTC, a magnitude 2.1 earthquake struck 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 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 → |
August 21, 2026 brought a magnitude 2.3 earthquake 97 km SSE of Akutan, Alaska, logged at 18:51 UTC. Coming 17 hours after a magnitude 2.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. 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 5.8 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 → |
This magnitude 2.9 event was detected 8 km WNW of Corcoran, CA on August 21, 2026, with origin time 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 → |
On August 21, 2026 at 18:33 UTC, a magnitude 2.3 earthquake struck 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 → |
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 → |
A magnitude 4.7 earthquake was recorded 197 km SE of Miyakojima, Japan on August 21, 2026 at 18:05 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 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 → |
This magnitude 3.3 event was detected 10 km ENE of Coso Junction, CA on August 21, 2026, with origin time 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 → |
A magnitude 2.3 earthquake was recorded 17 km SE of Clam Gulch, Alaska on August 21, 2026 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 → |
Seismographs logged a magnitude 2.0 earthquake 2 km W of Indios, Puerto Rico with origin time 15:22 UTC on August 21, 2026. This event falls inside the aftershock decay of a nearby magnitude 2.1 earthquake that occurred about 10 hours earlier. 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 → |
The USGS recorded this magnitude 4.1 earthquake 178 km W of Neiafu, Tonga at 15:21 UTC on August 21, 2026. The event was offshore. See the M4.1 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.