Earthquakes on August 28, 2026
222
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
24
M3.0–3.9
11
M2.0–2.9
53
M1.0–1.9
128
Activity Summary
222
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
124 km N 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 94 (filtered from 222)
(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 NNW of Ástros, Greece 37.422°, 22.710° | 89.6 km | 2 | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 earthquake was recorded 2 km NNW of Ástros, Greece on August 28, 2026 at 23:55 UTC. 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 | 106 km ESE of Antofagasta, Chile -23.951°, -69.399° | 77.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:48 UTC on August 28, 2026, a magnitude 4.3 tremor occurred 106 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 23:28:35 UTC | 3.5mb | 212 km SSE of False Pass, Alaska 53.134°, -162.018° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 28, 2026 at 23:28 UTC, a magnitude 3.5 earthquake struck 212 km SSE of False Pass, Alaska. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 23:10:36 UTC | 4.8mww | 110 km E of Miyako, Japan 39.655°, 143.234° | 34.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.8 seismic event took place 110 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 → |
The USGS recorded this magnitude 2.2 earthquake 27 km SW of Petersville, Alaska at 23:00 UTC on August 28, 2026. 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 22:30:32 UTC | 4.1mb | 20 km SSW of Nueva Sesecapa, Mexico 15.237°, -92.916° | 84.7 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.1 event was detected 20 km SSW of Nueva Sesecapa, Mexico on August 28, 2026, with origin time 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 22:07:33 UTC | 4.9mb | 124 km N of Aksu, China 42.286°, 80.525° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.9 event was detected 124 km N of Aksu, China on August 28, 2026, with origin time 22:07 UTC. The event was offshore. 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 → |
On August 28, 2026, worldwide seismic activity registered a magnitude 2.9 earthquake 107 km ESE of Akutan, Alaska at 21:44 UTC. 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 → |
Reports of a magnitude 2.8 earthquake 57 km W of Petrolia, CA came in 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 → |
The USGS recorded this magnitude 2.6 earthquake 178 km WSW of Adak, Alaska at 21:21 UTC on August 28, 2026. This event falls inside the aftershock decay of a nearby magnitude 3.1 earthquake that occurred about 2 hours earlier. 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 → |
The USGS recorded this magnitude 2.4 earthquake 57 km S of Ivanof Bay, Alaska at 21:19 UTC on August 28, 2026. 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 → |
On August 28, 2026 at 21:18 UTC, a magnitude 2.7 earthquake struck 56 km W of Petrolia, CA. 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 → |
On August 28, 2026 at 21:01 UTC, a magnitude 2.6 earthquake struck 17 km SSW of Beatty, Nevada. 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 → |
This magnitude 2.2 event was detected 48 km NW of Ninilchik, Alaska on August 28, 2026, with origin time 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 → |
This magnitude 2.6 event was detected 18 km NE of Gardendale, Texas on August 28, 2026, with origin time 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 → |
Seismographs logged a magnitude 2.0 earthquake 19 km WSW of Susitna North, Alaska with origin time 20:26 UTC on August 28, 2026. 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 → |
On August 28, 2026, worldwide seismic activity registered a magnitude 2.0 earthquake 22 km NNW of Toyah, Texas at 20:26 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. | ||||||||
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 → |
August 28, 2026 brought a magnitude 2.0 earthquake 10 km ENE of Coso Junction, CA, logged at 19:47 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. | ||||||||
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 → |
This magnitude 2.4 event was detected 14 km SSE of Tallaboa, Puerto Rico on August 28, 2026, with origin time 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 → |
This magnitude 3.1 event was detected 162 km WSW of Adak, Alaska on August 28, 2026, with origin time 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 → |
At 17:54 UTC on August 28, 2026, a magnitude 2.9 tremor occurred 40 km NE of Atka, Alaska. 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 → |
A magnitude 2.4 seismic event took place 92 km SSW of Alberto Oviedo Mota, B.C., MX on August 28, 2026 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 → |
A magnitude 2.7 earthquake was recorded 108 km SSW of Port Alexander, Alaska on August 28, 2026 at 17:37 UTC. 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 → |
On August 28, 2026, worldwide seismic activity registered a magnitude 3.3 earthquake 74 km SSE of False Pass, Alaska at 17:27 UTC. 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 → |
Seismographs logged a magnitude 2.7 earthquake 181 km WSW of Adak, Alaska with origin time 16:46 UTC on August 28, 2026. This event falls inside the aftershock decay of a nearby magnitude 2.8 earthquake that occurred about 4 hours earlier. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 16:15:27 UTC | 4.0mb | Fiji region -21.927°, -179.600° | 618.4 km | - | - | - | ✓ Reviewed | USGS → |
August 28, 2026 brought a magnitude 4.0 earthquake in the Fiji region, logged at 16:15 UTC. This is the deepest earthquake in the current dataset — a deep-focus event. See the M4.0 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.