Earthquakes on August 28, 2026
223
EARTHQUAKES on August 28, 2026
24-hour UTC period · USGS data
LARGEST: M5.2 — southeast Indian Ridge
10 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
6
M4.0–4.9
25
M3.0–3.9
11
M2.0–2.9
53
M1.0–1.9
128
Activity Summary
223
Total earthquakes
~250
Daily average
Normal
Activity level
6
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.2
southeast Indian Ridge
04:59 UTC · 10.0 km deep
5.0
191 km ESE of Kimbe, Papua New Guinea
20:19 UTC · 10.0 km deep
5.0
172 km SE of Petropavlovsk-Kamchatsky, Russia
09:12 UTC · 10.0 km deep
5.0
115 km WNW of Isangel, Vanuatu
08:32 UTC · 10.0 km deep
Felt by 3
5.0
19 km NW of Fuji, China
05:13 UTC · 10.0 km deep
5.0
northern East Pacific Rise
02:39 UTC · 10.0 km deep
4.9
120 km NNE of Aksu, China
22:07 UTC · 10.0 km deep
4.9
Southwest Indian Ridge
19:12 UTC · 10.0 km deep
Earthquake Map — August 28, 2026
All Earthquakes — August 28, 2026
Showing 30 of 95 (filtered from 223)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2026-08-28 2026-08-28 23:55:58 UTC | 4.5mb | 2 km E of Ástros, Greece 37.406°, 22.747° | 85.8 km | 2 | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 earthquake was recorded 2 km E of Ástros, Greece on August 28, 2026 at 23:55 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 23:48:03 UTC | 4.3mb | 107 km ESE of Antofagasta, Chile -23.951°, -69.391° | 78.7 km | - | - | - | ✓ Reviewed | USGS → |
At 23:48 UTC on August 28, 2026, a magnitude 4.3 tremor occurred 107 km ESE of Antofagasta, Chile. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 23:43:24 UTC | 4.3mb | 51 km SSE of Vilyuchinsk, Russia 52.525°, 158.759° | 78.2 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.3 earthquake 51 km SSE of Vilyuchinsk, Russia at 23:43 UTC on August 28, 2026. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 23:28:35 UTC | 3.5mb | 210 km SSE of False Pass, Alaska 53.143°, -162.048° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.5 earthquake was recorded 210 km SSE of False Pass, Alaska on August 28, 2026 at 23:28 UTC. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 23:10:35 UTC | 4.8mww | 111 km E of Miyako, Japan 39.660°, 143.239° | 29.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.8 seismic event took place 111 km E of Miyako, Japan on August 28, 2026 at 23:10 UTC. The event was offshore. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 23:00:12 UTC | 2.2ml | 27 km SW of Petersville, Alaska 62.355°, -151.209° | 80.2 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.2 event was detected 27 km SW of Petersville, Alaska on August 28, 2026, with origin time 23:00 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 22:30:30 UTC | 4.1mb | 47 km WSW of El Arenal, Mexico 15.006°, -93.106° | 78.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.1 earthquake 47 km WSW of El Arenal, Mexico came in on August 28, 2026 at 22:30 UTC. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 22:07:32 UTC | 4.9mb | 120 km NNE of Aksu, China 42.245°, 80.575° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.9 event was detected 120 km NNE of Aksu, China on August 28, 2026, with origin time 22:07 UTC. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 21:44:07 UTC | 2.9ml | 107 km ESE of Akutan, Alaska 53.723°, -164.290° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
At 21:44 UTC on August 28, 2026, a magnitude 2.9 tremor occurred 107 km ESE of Akutan, Alaska. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 21:24:34 UTC | 2.8md | 57 km W of Petrolia, CA 40.334°, -124.952° | 24.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.8 seismic event took place 57 km W of Petrolia, CA on August 28, 2026 at 21:24 UTC. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 21:21:51 UTC | 2.6ml | 178 km WSW of Adak, Alaska 51.334°, -179.068° | 53.4 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.6 event was detected 178 km WSW of Adak, Alaska on August 28, 2026, with origin time 21:21 UTC. Coming 2 hours after a magnitude 3.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 21:19:28 UTC | 2.4ml | 57 km S of Ivanof Bay, Alaska 55.386°, -159.541° | 15.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.4 event was detected 57 km S of Ivanof Bay, Alaska on August 28, 2026, with origin time 21:19 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 21:18:08 UTC | 2.7md | 56 km W of Petrolia, CA 40.346°, -124.941° | 19.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.7 earthquake was recorded 56 km W of Petrolia, CA on August 28, 2026 at 21:18 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 21:01:02 UTC | 2.6ml | 17 km SSW of Beatty, Nevada 36.757°, -116.798° | 1.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.6 earthquake was recorded 17 km SSW of Beatty, Nevada on August 28, 2026 at 21:01 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 20:44:58 UTC | 2.2ml | 48 km NW of Ninilchik, Alaska 60.353°, -152.301° | 93.3 km | 1 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.2 earthquake 48 km NW of Ninilchik, Alaska came in on August 28, 2026 at 20:44 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 20:44:36 UTC | 4.5mb | 38 km NNE of Cuya, Chile -18.868°, -69.975° | 88.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.5 earthquake 38 km NNE of Cuya, Chile with origin time 20:44 UTC on August 28, 2026. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 20:31:30 UTC | 2.6ml | 18 km NE of Gardendale, Texas 32.123°, -102.220° | 7.6 km | 3 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.6 earthquake 18 km NE of Gardendale, Texas came in on August 28, 2026 at 20:31 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 20:26:08 UTC | 2.0ml | 19 km WSW of Susitna North, Alaska 62.119°, -150.217° | 50.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 28, 2026, worldwide seismic activity registered a magnitude 2.0 earthquake 19 km WSW of Susitna North, Alaska at 20:26 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 20:26:00 UTC | 2.0ml | 22 km NNW of Toyah, Texas 31.511°, -103.840° | 4.8 km | - | - | - | ✓ Reviewed | USGS → |
At 20:26 UTC on August 28, 2026, a magnitude 2.0 tremor occurred 22 km NNW of Toyah, Texas. 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. | ||||||||
2026-08-28 2026-08-28 20:19:38 UTC | 5.0mb | 191 km ESE of Kimbe, Papua New Guinea -6.211°, 151.738° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 5.0 earthquake was recorded 191 km ESE of Kimbe, Papua New Guinea on August 28, 2026 at 20:19 UTC. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 19:47:31 UTC | 2.0ml | 10 km ENE of Coso Junction, CA 36.069°, -117.846° | 2.1 km | - | - | - | ✓ Reviewed | USGS → |
On August 28, 2026 at 19:47 UTC, a magnitude 2.0 earthquake struck 10 km ENE of Coso Junction, CA. 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. | ||||||||
2026-08-28 2026-08-28 19:13:12 UTC | 2.4md | 14 km SSE of Tallaboa, Puerto Rico 17.869°, -66.668° | 13.8 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.4 earthquake 14 km SSE of Tallaboa, Puerto Rico came in on August 28, 2026 at 19:13 UTC. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 19:12:55 UTC | 4.9mb | Southwest Indian Ridge -28.323°, 62.544° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.9 earthquake near Southwest Indian Ridge came in on August 28, 2026 at 19:12 UTC. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 18:59:09 UTC | 3.1ml | 162 km WSW of Adak, Alaska 51.422°, -178.864° | 32.9 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.1 earthquake 162 km WSW of Adak, Alaska came in on August 28, 2026 at 18:59 UTC. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 17:54:37 UTC | 2.9ml | 40 km NE of Atka, Alaska 52.493°, -173.850° | 181.8 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.9 earthquake 40 km NE of Atka, Alaska at 17:54 UTC on August 28, 2026. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 17:41:51 UTC | 4.4mb | 54 km ENE of Pondaguitan, Philippines 6.462°, 126.656° | 122.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.4 earthquake 54 km ENE of Pondaguitan, Philippines came in on August 28, 2026 at 17:41 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 17:40:57 UTC | 2.4ml | 92 km SSW of Alberto Oviedo Mota, B.C., MX 31.473°, -115.558° | 8.2 km | - | - | - | ✓ Reviewed | USGS → |
August 28, 2026 brought a magnitude 2.4 earthquake 92 km SSW of Alberto Oviedo Mota, B.C., MX, logged at 17:40 UTC. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 17:37:07 UTC | 2.7ml | 108 km SSW of Port Alexander, Alaska 55.296°, -134.986° | 22.7 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.7 earthquake 108 km SSW of Port Alexander, Alaska with origin time 17:37 UTC on August 28, 2026. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 17:27:58 UTC | 3.3ml | 74 km SSE of False Pass, Alaska 54.240°, -162.944° | 35.0 km | - | II | - | ✓ Reviewed | USGS → |
At 17:27 UTC on August 28, 2026, a magnitude 3.3 tremor occurred 74 km SSE of False Pass, Alaska. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 16:46:52 UTC | 2.7ml | 181 km WSW of Adak, Alaska 51.018°, -178.849° | 28.7 km | - | - | - | ✓ Reviewed | USGS → |
On August 28, 2026, worldwide seismic activity registered a magnitude 2.7 earthquake 181 km WSW of Adak, Alaska at 16:46 UTC. Coming 4 hours after a magnitude 2.8 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.7 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, 2026. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.