Earthquakes on August 21, 2025
252
EARTHQUAKES on August 21, 2025
24-hour UTC period · USGS data
10 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
3
M4.0–4.9
46
M3.0–3.9
8
M2.0–2.9
61
M1.0–1.9
134
Activity Summary
252
Total earthquakes
~250
Daily average
Normal
Activity level
3
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.8
165 km SE of Vilyuchinsk, Russia
11:21 UTC · 10.0 km deep
5.6
62 km SE of Ōfunato, Japan
22:34 UTC · 40.0 km deep
Felt by 7
5.0
125 km SW of Kokopo, Papua New Guinea
14:06 UTC · 133.8 km deep
4.9
165 km SE of Petropavlovsk-Kamchatsky, Russia
17:16 UTC · 9.9 km deep
4.9
162 km SE of Petropavlovsk-Kamchatsky, Russia
17:16 UTC · 10.0 km deep
4.9
184 km SE of Vilyuchinsk, Russia
03:44 UTC · 28.2 km deep
4.8
85 km S of Severo-Kuril’sk, Russia
21:37 UTC · 78.2 km deep
4.8
192 km SSE of Vilyuchinsk, Russia
19:40 UTC · 37.0 km deep
Earthquake Map — August 21, 2025
All Earthquakes — August 21, 2025
Showing 30 of 118 (filtered from 252)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2025-08-21 2025-08-21 23:59:54 UTC | 2.2ml | 42 km S of Caliente, Nevada 37.233°, -114.528° | 3.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 42 km S of Caliente, Nevada on August 21, 2025 at 23:59 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. | ||||||||
2025-08-21 2025-08-21 23:32:49 UTC | 2.1ml | 82 km S of Sand Point, Alaska 54.595°, -160.623° | 6.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 82 km S of Sand Point, Alaska on August 21, 2025 at 23:32 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 23:31:43 UTC | 4.7mb | northern Mid-Atlantic Ridge 33.171°, -39.643° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
August 21, 2025 brought a magnitude 4.7 earthquake near northern Mid-Atlantic Ridge, logged at 23:31 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 23:14:53 UTC | 2.2ml | 19 km WSW of Susitna, Alaska 61.452°, -150.817° | 56.8 km | - | - | - | ✓ Reviewed | USGS → |
August 21, 2025 brought a magnitude 2.2 earthquake 19 km WSW of Susitna, Alaska, logged at 23:14 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 23:06:16 UTC | 4.5mb | 45 km SE of Ōfunato, Japan 38.799°, 142.110° | 52.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 earthquake was recorded 45 km SE of Ōfunato, Japan on August 21, 2025 at 23:06 UTC. It arrived roughly 1 hours after a larger magnitude 5.6 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 22:56:57 UTC | 2.1ml | 90 km S of Sand Point, Alaska 54.531°, -160.285° | 26.7 km | - | - | - | ✓ Reviewed | USGS → |
August 21, 2025 brought a magnitude 2.1 earthquake 90 km S of Sand Point, Alaska, logged at 22:56 UTC. It arrived roughly 12 hours after a larger magnitude 2.9 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 22:47:27 UTC | 2.4md | 2 km of The Geysers, CA 38.791°, -122.761° | 0.1 km | 1 | - | - | Auto | USGS → |
Seismographs logged a magnitude 2.4 earthquake 2 km of The Geysers, CA with origin time 22:47 UTC on August 21, 2025. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 22:45:54 UTC | 2.0md | 2 km N of The Geysers, CA 38.793°, -122.759° | 0.2 km | - | - | - | Auto | USGS → |
A magnitude 2.0 earthquake was recorded 2 km N of The Geysers, CA on August 21, 2025 at 22:45 UTC. It arrived roughly 4 hours after a larger magnitude 2.4 mainshock in the same 20 km area, placing it within the typical aftershock window. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 22:40:26 UTC | 4.3mb | 12 km NNE of Maliana, Timor Leste -8.880°, 125.254° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 22:40 UTC on August 21, 2025, a magnitude 4.3 tremor occurred 12 km NNE of Maliana, Timor Leste. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 22:34:44 UTC | 4.7mb | 267 km SSE of Ushuaia, Argentina -57.136°, -67.213° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 21, 2025 at 22:34 UTC, a magnitude 4.7 earthquake struck 267 km SSE of Ushuaia, Argentina. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 22:34:44 UTC | 5.6mww | 62 km SE of Ōfunato, Japan 38.757°, 142.309° | 40.0 km | 7 | III | green | ✓ Reviewed | USGS → |
A magnitude 5.6 earthquake was recorded 62 km SE of Ōfunato, Japan on August 21, 2025 at 22:34 UTC. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. The event was offshore. See the M5.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 22:14:54 UTC | 4.2mb | 228 km SE of Severo-Kuril’sk, Russia 49.479°, 158.724° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 21, 2025 at 22:14 UTC, a magnitude 4.2 earthquake struck 228 km SE of Severo-Kuril’sk, Russia. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 21:37:14 UTC | 4.8mww | 85 km S of Severo-Kuril’sk, Russia 49.915°, 155.996° | 78.2 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.8 event was detected 85 km S of Severo-Kuril’sk, Russia on August 21, 2025, with origin time 21:37 UTC. The event was offshore. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 21:14:06 UTC | 3.0ml | 8 km W of Huxley, Texas 31.760°, -93.968° | 7.5 km | 15 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.0 earthquake 8 km W of Huxley, Texas at 21:14 UTC on August 21, 2025. The event was offshore. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 21:13:29 UTC | 2.2ml | 272 km SSE of King Cove, Alaska 52.690°, -161.267° | 11.9 km | - | - | - | ✓ Reviewed | USGS → |
On August 21, 2025 at 21:13 UTC, a magnitude 2.2 earthquake struck 272 km SSE of King Cove, Alaska. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 21:06:52 UTC | 4.3mb | 71 km SE of Vilyuchinsk, Russia 52.523°, 159.225° | 84.5 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.3 earthquake 71 km SE of Vilyuchinsk, Russia at 21:06 UTC on August 21, 2025. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 20:48:05 UTC | 4.1mb | 161 km ESE of Severo-Kuril’sk, Russia 49.919°, 158.069° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 20:48 UTC on August 21, 2025, a magnitude 4.1 tremor occurred 161 km ESE of Severo-Kuril’sk, Russia. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 20:32:54 UTC | 4.0mb | 74 km ENE of Petropavlovsk-Kamchatsky, Russia 53.282°, 159.674° | 63.9 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.0 earthquake 74 km ENE of Petropavlovsk-Kamchatsky, Russia came in on August 21, 2025 at 20:32 UTC. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 20:32:10 UTC | 2.2ml | 36 km SSE of Goldfield, Nevada 37.392°, -117.117° | 5.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 36 km SSE of Goldfield, Nevada on August 21, 2025 at 20:32 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 20:17:32 UTC | 4.5mb | 166 km SSE of Vilyuchinsk, Russia 51.484°, 159.028° | 66.8 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.5 earthquake 166 km SSE of Vilyuchinsk, Russia with origin time 20:17 UTC on August 21, 2025. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 20:15:10 UTC | 2.1ml | 55 km S of Whites City, New Mexico 31.677°, -104.425° | 6.2 km | - | - | - | ✓ Reviewed | USGS → |
On August 21, 2025 at 20:15 UTC, a magnitude 2.1 earthquake struck 55 km S of Whites City, New Mexico. This event falls inside the aftershock decay of a nearby magnitude 3.5 earthquake that occurred about 16 hours earlier. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 20:13:59 UTC | 2.1ml | 42 km SSE of King Cove, Alaska 54.706°, -162.067° | 52.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 42 km SSE of King Cove, Alaska on August 21, 2025 at 20:13 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 19:53:58 UTC | 2.9ml | 217 km W of Adak, Alaska 51.889°, -179.793° | 123.3 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.9 earthquake 217 km W of Adak, Alaska came in on August 21, 2025 at 19:53 UTC. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 19:40:22 UTC | 4.8mb | 192 km SSE of Vilyuchinsk, Russia 51.306°, 159.376° | 37.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.8 earthquake 192 km SSE of Vilyuchinsk, Russia came in on August 21, 2025 at 19:40 UTC. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 19:37:57 UTC | 2.1ml | 55 km S of Whites City, New Mexico 31.680°, -104.417° | 6.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.1 earthquake 55 km S of Whites City, New Mexico with origin time 19:37 UTC on August 21, 2025. It arrived roughly 16 hours after a larger magnitude 3.5 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 19:11:19 UTC | 4.1mb | 198 km SSE of Vilyuchinsk, Russia 51.248°, 159.383° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.1 earthquake 198 km SSE of Vilyuchinsk, Russia at 19:11 UTC on August 21, 2025. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 19:08:48 UTC | 2.4md | 3 km NNW of The Geysers, CA 38.799°, -122.783° | 3.4 km | - | - | - | Auto | USGS → |
This magnitude 2.4 event was detected 3 km NNW of The Geysers, CA on August 21, 2025, with origin time 19:08 UTC. In the 72 hours after this event, the USGS recorded 3 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 18:57:22 UTC | 4.7mb | 187 km ENE of Petropavlovsk-Kamchatsky, Russia 53.626°, 161.276° | 36.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.7 earthquake was recorded 187 km ENE of Petropavlovsk-Kamchatsky, Russia on August 21, 2025 at 18:57 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-21 2025-08-21 18:51:23 UTC | 4.3mb | Bonin Islands, Japan region 28.008°, 139.375° | 511.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.3 event was detected in the Bonin Islands, Japan region on August 21, 2025, with origin time 18:51 UTC. 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. | ||||||||
2025-08-21 2025-08-21 18:44:25 UTC | 4.1mb | 212 km ESE of Severo-Kuril’sk, Russia 50.172°, 159.005° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.1 event was detected 212 km ESE of Severo-Kuril’sk, Russia on August 21, 2025, with origin time 18:44 UTC. 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, 2025. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.