Earthquakes on August 28, 2026
240
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+
7
M4.0–4.9
42
M3.0–3.9
12
M2.0–2.9
52
M1.0–1.9
127
Activity Summary
240
Total earthquakes
~250
Daily average
Normal
Activity level
7
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
185 km ESE of Kimbe, Papua New Guinea
20:19 UTC · 10.0 km deep
5.0
174 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
22 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
5.0
Pacific-Antarctic Ridge
01:53 UTC · 10.0 km deep
4.9
120 km NNE of Aksu, China
22:07 UTC · 10.0 km deep
Earthquake Map — August 28, 2026
All Earthquakes — August 28, 2026
Showing 30 of 113 (filtered from 240)
(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 | 4.3mwr | 2 km E of Ástros, Greece 37.406°, 22.746° | 85.9 km | 2 | - | - | ✓ Reviewed | USGS → |
This magnitude 4.3 event was detected 2 km E of Ástros, Greece on August 28, 2026, with origin time 23:55 UTC. The event was offshore. See the M4.3 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 → |
Reports of a magnitude 4.3 earthquake 107 km ESE of Antofagasta, Chile came in on August 28, 2026 at 23:48 UTC. 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 → |
A magnitude 4.3 seismic event took place 51 km SSE of Vilyuchinsk, Russia on August 28, 2026 at 23:43 UTC. 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 | 3.6mb | 212 km SSE of False Pass, Alaska 53.129°, -162.005° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
August 28, 2026 brought a magnitude 3.6 earthquake 212 km SSE of False Pass, Alaska, logged at 23:28 UTC. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 23:27:59 UTC | 4.8mb | Pacific-Antarctic Ridge -57.416°, -148.171° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 28, 2026 at 23:27 UTC, a magnitude 4.8 earthquake struck near Pacific-Antarctic Ridge. See the M4.8 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 earthquake was recorded 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 → |
At 23:00 UTC on August 28, 2026, a magnitude 2.2 tremor occurred 27 km SW of Petersville, Alaska. 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 → |
On August 28, 2026, worldwide seismic activity registered a magnitude 4.1 earthquake 47 km WSW of El Arenal, Mexico 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 → |
Reports of a magnitude 4.9 earthquake 120 km NNE of Aksu, China came in on August 28, 2026 at 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 → |
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 21:34:14 UTC | 4.5mb | Southwest Indian Ridge -27.702°, 64.397° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.5 event was detected near Southwest Indian Ridge on August 28, 2026, with origin time 21:34 UTC. See the M4.5 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 → |
This magnitude 2.8 event was detected 57 km W of Petrolia, CA on August 28, 2026, with origin time 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 → |
On August 28, 2026, worldwide seismic activity registered a magnitude 2.6 earthquake 178 km WSW of Adak, Alaska at 21:21 UTC. 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 → |
At 21:19 UTC on August 28, 2026, a magnitude 2.4 tremor occurred 57 km S of Ivanof Bay, Alaska. 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 seismic event took place 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 21:11:29 UTC | 4.5mb | 24 km NNE of Bay View, New Zealand -39.235°, 177.018° | 17.2 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.5 earthquake 24 km NNE of Bay View, New Zealand came in on August 28, 2026 at 21:11 UTC. See the M4.5 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 → |
August 28, 2026 brought a magnitude 2.6 earthquake 17 km SSW of Beatty, Nevada, logged 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 → |
The USGS recorded this magnitude 2.2 earthquake 48 km NW of Ninilchik, Alaska at 20:44 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 20:44:36 UTC | 4.4mb | 38 km NE of Cuya, Chile -18.874°, -69.975° | 84.8 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.4 earthquake 38 km NE of Cuya, Chile at 20:44 UTC on August 28, 2026. The event was offshore. See the M4.4 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 | 2 | - | - | ✓ Reviewed | USGS → |
At 20:31 UTC on August 28, 2026, a magnitude 2.6 tremor occurred 18 km NE of Gardendale, Texas. 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 20:28:27 UTC | 4.4mb | 95 km N of Baukau, Timor Leste -7.613°, 126.370° | 261.7 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.4 event was detected 95 km N of Baukau, Timor Leste on August 28, 2026, with origin time 20:28 UTC. The event was offshore. See the M4.4 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 → |
A magnitude 2.0 earthquake was recorded 19 km WSW of Susitna North, Alaska on August 28, 2026 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 → |
Seismographs logged a magnitude 2.0 earthquake 22 km NNW of Toyah, Texas with origin time 20:26 UTC on August 28, 2026. 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 | 185 km ESE of Kimbe, Papua New Guinea -6.212°, 151.676° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 5.0 earthquake was recorded 185 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 20:07:43 UTC | 4.6mb | 85 km NNE of Ruteng, Indonesia -7.860°, 120.639° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.6 earthquake 85 km NNE of Ruteng, Indonesia with origin time 20:07 UTC on August 28, 2026. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-28 2026-08-28 20:06:23 UTC | 4.4mb | 52 km S of Kimbe, Papua New Guinea -6.021°, 150.179° | 50.9 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.4 earthquake 52 km S of Kimbe, Papua New Guinea came in on August 28, 2026 at 20:06 UTC. The event was offshore. See the M4.4 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 → |
A magnitude 2.0 seismic event took place 10 km ENE of Coso Junction, CA on August 28, 2026 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 → |
The USGS recorded this magnitude 2.4 earthquake 14 km SSE of Tallaboa, Puerto Rico at 19:13 UTC on August 28, 2026. 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 -28.250°, 62.405° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.9 seismic event took place near Southwest Indian Ridge 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 19:09:30 UTC | 4.9mb | southern Mid-Atlantic Ridge -12.357°, -14.757° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
August 28, 2026 brought a magnitude 4.9 earthquake near southern Mid-Atlantic Ridge, logged at 19:09 UTC. See the M4.9 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, 2026. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.