Earthquakes on August 28, 2025
248
EARTHQUAKES on August 28, 2025
24-hour UTC period · USGS data
LARGEST: M5.9 — 237 km W of Adak, Alaska
130 km deep · 2 people felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
5
M4.0–4.9
36
M3.0–3.9
9
M2.0–2.9
52
M1.0–1.9
146
Activity Summary
248
Total earthquakes
~250
Daily average
Normal
Activity level
5
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.9
237 km W of Adak, Alaska
11:07 UTC · 130.0 km deep
Felt by 2
5.4
54 km SSE of Ulaangom, Mongolia
02:22 UTC · 10.0 km deep
Felt by 1
5.2
135 km SSE of Isangel, Vanuatu
11:40 UTC · 50.2 km deep
5.2
155 km SSE of Kokopo, Papua New Guinea
04:31 UTC · 10.0 km deep
5.0
167 km ESE of Petropavlovsk-Kamchatsky, Russia
22:10 UTC · 10.0 km deep
4.9
202 km S of Severo-Kuril’sk, Russia
14:16 UTC · 10.0 km deep
4.9
27 km NW of Kotabumi, Indonesia
02:15 UTC · 193.1 km deep
4.8
37 km SW of La Quiaca, Argentina
17:02 UTC · 270.8 km deep
Felt by 1
Earthquake Map — August 28, 2025
All Earthquakes — August 28, 2025
Showing 30 of 102 (filtered from 248)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2025-08-28 2025-08-28 23:58:29 UTC | 4.7mb | 151 km ESE of Petropavlovsk-Kamchatsky, Russia 52.371°, 160.558° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
August 28, 2025 brought a magnitude 4.7 earthquake 151 km ESE of Petropavlovsk-Kamchatsky, Russia, logged at 23:58 UTC. It arrived roughly 2 hours after a larger magnitude 5.0 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 23:38:05 UTC | 2.1md | 6 km SSW of Guánica, Puerto Rico 17.917°, -66.937° | 14.3 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.1 earthquake 6 km SSW of Guánica, Puerto Rico came in on August 28, 2025 at 23:38 UTC. It arrived roughly 16 hours after a larger magnitude 2.5 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 23:37:58 UTC | 2.8ml | 6 km SSE of Mentone, CA 34.027°, -117.104° | 10.9 km | 43 | II | - | ✓ Reviewed | USGS → |
On August 28, 2025, worldwide seismic activity registered a magnitude 2.8 earthquake 6 km SSE of Mentone, CA at 23:37 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 23:33:18 UTC | 4.0mb | 46 km SW of Jurm, Afghanistan 36.538°, 70.516° | 217.6 km | - | - | - | ✓ Reviewed | USGS → |
August 28, 2025 brought a magnitude 4.0 earthquake 46 km SW of Jurm, Afghanistan, logged at 23:33 UTC. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 22:52:59 UTC | 3.6mw | 57 km NE of Valmy, Nevada 41.194°, -116.699° | 8.5 km | 1 | III | - | ✓ Reviewed | USGS → |
At 22:52 UTC on August 28, 2025, a magnitude 3.6 tremor occurred 57 km NE of Valmy, Nevada. The event was offshore. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 22:10:35 UTC | 5.0mww | 167 km ESE of Petropavlovsk-Kamchatsky, Russia 52.258°, 160.726° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 22:10 UTC on August 28, 2025, a magnitude 5.0 tremor occurred 167 km ESE of Petropavlovsk-Kamchatsky, Russia. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 22:06:49 UTC | 2.1ml | 42 km SSW of Ucluelet, Canada 48.583°, -125.730° | 39.7 km | 1 | - | - | ✓ Reviewed | USGS → |
August 28, 2025 brought a magnitude 2.1 earthquake 42 km SSW of Ucluelet, Canada, logged at 22:06 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 22:00:59 UTC | 2.9ml | 96 km SSE of Sand Point, Alaska 54.522°, -159.966° | 21.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 earthquake was recorded 96 km SSE of Sand Point, Alaska on August 28, 2025 at 22:00 UTC. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 22:00:58 UTC | 4.1mb | 225 km SSW of Severo-Kuril’sk, Russia 48.836°, 154.821° | 63.2 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.1 earthquake 225 km SSW of Severo-Kuril’sk, Russia at 22:00 UTC on August 28, 2025. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 21:21:35 UTC | 2.0ml | 8 km ENE of Calumet, Oklahoma 35.630°, -98.032° | 7.4 km | 1 | - | - | ✓ Reviewed | USGS → |
August 28, 2025 brought a magnitude 2.0 earthquake 8 km ENE of Calumet, Oklahoma, logged at 21:21 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 M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 21:19:13 UTC | 4.4mb | northern Mid-Atlantic Ridge 43.559°, -28.894° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.4 earthquake near northern Mid-Atlantic Ridge with origin time 21:19 UTC on August 28, 2025. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 21:15:31 UTC | 2.0ml | 6 km ENE of Calumet, Oklahoma 35.615°, -98.044° | 7.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 6 km ENE of Calumet, Oklahoma with origin time 21:15 UTC on August 28, 2025. 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 M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 20:51:48 UTC | 2.6ml | 78 km ENE of Adak, Alaska 52.260°, -175.677° | 182.2 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.6 earthquake 78 km ENE of Adak, Alaska came in on August 28, 2025 at 20:51 UTC. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 20:43:33 UTC | 2.3ml | 37 km ESE of Denali National Park, Alaska 63.474°, -150.993° | 13.3 km | 1 | - | - | ✓ Reviewed | USGS → |
On August 28, 2025, worldwide seismic activity registered a magnitude 2.3 earthquake 37 km ESE of Denali National Park, Alaska at 20:43 UTC. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 20:30:10 UTC | 2.0ml | 8 km S of Bodfish, CA 35.514°, -118.488° | 5.0 km | 1 | - | - | ✓ Reviewed | USGS → |
On August 28, 2025 at 20:30 UTC, a magnitude 2.0 earthquake struck 8 km S of Bodfish, CA. 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. | ||||||||
2025-08-28 2025-08-28 20:19:57 UTC | 2.0ml | 211 km W of Adak, Alaska 51.555°, -179.655° | 58.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 28, 2025, worldwide seismic activity registered a magnitude 2.0 earthquake 211 km W of Adak, Alaska at 20:19 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 19:54:32 UTC | 4.6mb | 28 km ESE of Takahagi, Japan 36.650°, 141.020° | 91.7 km | - | - | - | ✓ Reviewed | USGS → |
On August 28, 2025 at 19:54 UTC, a magnitude 4.6 earthquake struck 28 km ESE of Takahagi, Japan. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 19:11:08 UTC | 3.0md | 1 km SE of Coto Norte, Puerto Rico 18.419°, -66.426° | 66.3 km | 1 | - | - | ✓ Reviewed | USGS → |
On August 28, 2025 at 19:11 UTC, a magnitude 3.0 earthquake struck 1 km SE of Coto Norte, Puerto Rico. The event was offshore. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 18:58:40 UTC | 4.5mb | Drake Passage -60.349°, -61.838° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 18:58 UTC on August 28, 2025, a magnitude 4.5 tremor occurred near Drake Passage. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 18:24:46 UTC | 4.2mb | Pagan region, Northern Mariana Islands 18.395°, 145.367° | 483.7 km | - | - | - | ✓ Reviewed | USGS → |
On August 28, 2025, worldwide seismic activity registered a magnitude 4.2 earthquake in the Pagan region, Northern Mariana Islands at 18:24 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 17:59:58 UTC | 3.8mb | 105 km ESE of Atka, Alaska 51.902°, -172.737° | 65.4 km | - | III | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.8 earthquake 105 km ESE of Atka, Alaska with origin time 17:59 UTC on August 28, 2025. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 17:56:17 UTC | 2.0ml | 2 km NE of Colfax, Washington 46.895°, -117.336° | -0.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 2 km NE of Colfax, Washington on August 28, 2025 at 17:56 UTC. 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. | ||||||||
2025-08-28 2025-08-28 17:50:25 UTC | 3.0ml | 271 km NNW of Inuvik, Canada 70.704°, -135.607° | 19.5 km | - | - | - | ✓ Reviewed | USGS → |
August 28, 2025 brought a magnitude 3.0 earthquake 271 km NNW of Inuvik, Canada, logged at 17:50 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 17:38:47 UTC | 2.1ml | 47 km ESE of Atka, Alaska 51.975°, -173.606° | 54.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 47 km ESE of Atka, Alaska on August 28, 2025 at 17:38 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 17:36:43 UTC | 4.5mb | 229 km ESE of Pondaguitan, Philippines 5.451°, 128.045° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.5 earthquake 229 km ESE of Pondaguitan, Philippines at 17:36 UTC on August 28, 2025. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 17:32:45 UTC | 2.3ml | 12 km NE of Pāhala, Hawaii 19.276°, -155.390° | 29.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 seismic event took place 12 km NE of Pāhala, Hawaii on August 28, 2025 at 17:32 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 17:02:59 UTC | 4.8mb | 37 km SW of La Quiaca, Argentina -22.368°, -65.827° | 270.8 km | 1 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.8 earthquake 37 km SW of La Quiaca, Argentina came in on August 28, 2025 at 17:02 UTC. The event was offshore. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 16:48:48 UTC | 3.2md | 54 km WSW of Stella, Puerto Rico 18.143°, -67.725° | 77.6 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.2 event was detected 54 km WSW of Stella, Puerto Rico on August 28, 2025, with origin time 16:48 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.8 earthquake that occurred about 1 hours earlier. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 16:06:19 UTC | 3.8md | 54 km WSW of Stella, Puerto Rico 18.134°, -67.721° | 72.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 28, 2025, worldwide seismic activity registered a magnitude 3.8 earthquake 54 km WSW of Stella, Puerto Rico at 16:06 UTC. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-28 2025-08-28 15:50:49 UTC | 3.9mb | Maug Islands region, Northern Mariana Islands 20.480°, 144.866° | 186.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.9 earthquake was recorded in the Maug Islands region, Northern Mariana Islands on August 28, 2025 at 15:50 UTC. See the M3.9 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 28, 2025. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.