Earthquakes on September 4, 2026
273
EARTHQUAKES on September 4, 2026
24-hour UTC period · USGS data
LARGEST: M5.5 — 152 km E of Kuril’sk, Russia
32 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
7
M4.0–4.9
24
M3.0–3.9
22
M2.0–2.9
89
M1.0–1.9
131
Activity Summary
273
Total earthquakes
~250
Daily average
Normal
Activity level
7
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.5
152 km E of Kuril’sk, Russia
23:52 UTC · 32.0 km deep
5.4
Kermadec Islands region
11:59 UTC · 10.0 km deep
5.2
30 km SSE of Cilacap, Indonesia
05:04 UTC · 10.0 km deep
Felt by 5
5.1
central Mid-Atlantic Ridge
23:38 UTC · 10.0 km deep
5.1
23 km WSW of Padangsidempuan, Indonesia
16:24 UTC · 122.0 km deep
5.0
south of the Fiji Islands
13:47 UTC · 61.1 km deep
5.0
South Sandwich Islands region
06:45 UTC · 10.0 km deep
4.8
230 km ESE of Attu Station, Alaska
02:28 UTC · 10.0 km deep
Earthquake Map — September 4, 2026
All Earthquakes — September 4, 2026
Showing 30 of 142 (filtered from 273)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2026-09-04 2026-09-04 23:54:25 UTC | 2.6ml | Rat Islands, Aleutian Islands, Alaska 51.342°, 179.025° | 58.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:54 UTC on September 4, 2026, a magnitude 2.6 tremor occurred near Rat Islands, Aleutian Islands, Alaska. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 23:52:30 UTC | 5.5mww | 152 km E of Kuril’sk, Russia 45.028°, 149.802° | 32.0 km | - | III | green | ✓ Reviewed | USGS → |
On September 4, 2026 at 23:52 UTC, a magnitude 5.5 earthquake struck 152 km E of Kuril’sk, Russia. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. It is the largest earthquake currently listed for worldwide seismic activity on September 4, 2026. See the M5.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 23:38:40 UTC | 5.1mww | central Mid-Atlantic Ridge 9.383°, -40.810° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 4, 2026, worldwide seismic activity registered a magnitude 5.1 earthquake near central Mid-Atlantic Ridge at 23:38 UTC. See the M5.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 23:37:18 UTC | 2.9md | 65 km N of Tierras Nuevas Poniente, Puerto Rico 19.052°, -66.454° | 11.1 km | - | - | - | ✓ Reviewed | USGS → |
On September 4, 2026, worldwide seismic activity registered a magnitude 2.9 earthquake 65 km N of Tierras Nuevas Poniente, Puerto Rico at 23:37 UTC. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 23:33:01 UTC | 2.0ml | 33 km WSW of Mentone, Texas 31.600°, -103.934° | 7.6 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.0 earthquake 33 km WSW of Mentone, Texas at 23:33 UTC on September 4, 2026. It arrived roughly 19 hours after a larger magnitude 3.1 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 23:31:40 UTC | 2.7ml | 20 km S of South Van Horn, Alaska 64.623°, -147.744° | 18.2 km | 20 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.7 earthquake 20 km S of South Van Horn, Alaska with origin time 23:31 UTC on September 4, 2026. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 23:23:26 UTC | 2.5ml | 7 km WNW of Nikiski, Alaska 60.727°, -151.413° | 76.8 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 seismic event took place 7 km WNW of Nikiski, Alaska on September 4, 2026 at 23:23 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 23:17:48 UTC | 4.5mb | 49 km NE of Ruteng, Indonesia -8.316°, 120.803° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 earthquake was recorded 49 km NE of Ruteng, Indonesia on September 4, 2026 at 23:17 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 23:14:17 UTC | 2.5ml | 56 km S of Whites City, New Mexico 31.667°, -104.370° | 6.9 km | - | - | - | ✓ Reviewed | USGS → |
September 4, 2026 brought a magnitude 2.5 earthquake 56 km S of Whites City, New Mexico, logged at 23:14 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 22:39:35 UTC | 2.0ml | 20 km S of Denali National Park, Alaska 63.357°, -151.768° | 1.2 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 20 km S of Denali National Park, Alaska on September 4, 2026, with origin time 22:39 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. | ||||||||
2026-09-04 2026-09-04 22:30:29 UTC | 2.1ml | 9 km S of Honaunau-Napoopoo, Hawaii 19.375°, -155.851° | 17.4 km | 1 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.1 earthquake 9 km S of Honaunau-Napoopoo, Hawaii with origin time 22:30 UTC on September 4, 2026. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 22:22:17 UTC | 2.1ml | 56 km S of Whites City, New Mexico 31.669°, -104.367° | 6.7 km | - | - | - | ✓ Reviewed | USGS → |
On September 4, 2026, worldwide seismic activity registered a magnitude 2.1 earthquake 56 km S of Whites City, New Mexico at 22:22 UTC. It arrived roughly 12 hours after a larger magnitude 2.2 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. | ||||||||
2026-09-04 2026-09-04 21:56:28 UTC | 2.0ml | 12 km SSE of Stonewall Gap, Colorado 37.049°, -104.993° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.0 earthquake 12 km SSE of Stonewall Gap, Colorado came in on September 4, 2026 at 21:56 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 21:56:09 UTC | 4.2mb | 46 km NNW of Dededo Village, Guam 13.914°, 144.697° | 143.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.2 earthquake was recorded 46 km NNW of Dededo Village, Guam on September 4, 2026 at 21:56 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 21:41:07 UTC | 4.2mb | 18 km WSW of Guápiles, Costa Rica 10.147°, -83.935° | 93.9 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.2 earthquake 18 km WSW of Guápiles, Costa Rica with origin time 21:41 UTC on September 4, 2026. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 21:15:42 UTC | 2.2ml | 65 km ESE of Cantwell, Alaska 63.178°, -147.731° | 1.1 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.2 earthquake 65 km ESE of Cantwell, Alaska came in on September 4, 2026 at 21:15 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. | ||||||||
2026-09-04 2026-09-04 21:10:31 UTC | 4.2mb | 39 km S of Acajutla, El Salvador 13.245°, -89.887° | 39.9 km | - | - | - | ✓ Reviewed | USGS → |
On September 4, 2026, worldwide seismic activity registered a magnitude 4.2 earthquake 39 km S of Acajutla, El Salvador at 21:10 UTC. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 20:55:54 UTC | 2.4ml | 86 km E of Akutan, Alaska 54.063°, -164.464° | 16.6 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.4 event was detected 86 km E of Akutan, Alaska on September 4, 2026, with origin time 20:55 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 20:53:24 UTC | 4.4mb | 1 km SW of Looc, Philippines 14.155°, 120.616° | 120.3 km | 1 | - | - | ✓ Reviewed | USGS → |
At 20:53 UTC on September 4, 2026, a magnitude 4.4 tremor occurred 1 km SW of Looc, Philippines. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 19:49:04 UTC | 3.5ml | 184 km SE of Perryville, Alaska 54.796°, -156.983° | 28.5 km | - | I | - | ✓ Reviewed | USGS → |
At 19:49 UTC on September 4, 2026, a magnitude 3.5 tremor occurred 184 km SE of Perryville, Alaska. The event was offshore. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 19:46:45 UTC | 2.3ml | 77 km N of White Mountain, Alaska 65.365°, -163.141° | 16.2 km | - | - | - | ✓ Reviewed | USGS → |
At 19:46 UTC on September 4, 2026, a magnitude 2.3 tremor occurred 77 km N of White Mountain, Alaska. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 19:40:20 UTC | 2.6ml | 20 km WSW of Port Lions, Alaska 57.795°, -153.208° | 42.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.6 earthquake 20 km WSW of Port Lions, Alaska at 19:40 UTC on September 4, 2026. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 19:31:45 UTC | 4.2mb | 3 km ENE of Luzzi, Italy 39.465°, 16.321° | 8.8 km | - | - | - | ✓ Reviewed | USGS → |
At 19:31 UTC on September 4, 2026, a magnitude 4.2 tremor occurred 3 km ENE of Luzzi, Italy. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 19:03:50 UTC | 4.4mb | South Sandwich Islands region -56.074°, -25.950° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.4 earthquake in the South Sandwich Islands region at 19:03 UTC on September 4, 2026. It arrived roughly 12 hours after a larger magnitude 5.0 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 18:34:01 UTC | 4.6mwr | 28 km NW of Raumati Beach, New Zealand -40.731°, 174.756° | 48.8 km | 27 | - | - | ✓ Reviewed | USGS → |
On September 4, 2026 at 18:34 UTC, a magnitude 4.6 earthquake struck 28 km NW of Raumati Beach, New Zealand. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 18:20:06 UTC | 2.1md | 11 km NE of Pāhala, Hawaii 19.271°, -155.396° | 28.8 km | - | - | - | ✓ Reviewed | USGS → |
September 4, 2026 brought a magnitude 2.1 earthquake 11 km NE of Pāhala, Hawaii, logged at 18:20 UTC. It arrived roughly 6 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. | ||||||||
2026-09-04 2026-09-04 17:57:40 UTC | 3.0ml | 78 km ENE of Ugashik, Alaska 57.811°, -156.199° | 131.6 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.0 earthquake 78 km ENE of Ugashik, Alaska came in on September 4, 2026 at 17:57 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 17:31:27 UTC | 2.3md | 2 km N of The Geysers, CA 38.792°, -122.759° | 1.9 km | - | - | - | Auto | USGS → |
On September 4, 2026, worldwide seismic activity registered a magnitude 2.3 earthquake 2 km N of The Geysers, CA at 17:31 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 M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-04 2026-09-04 17:29:21 UTC | 2.6ml | 86 km SSW of Nikolski, Alaska 52.269°, -169.505° | 24.8 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.6 event was detected 86 km SSW of Nikolski, Alaska on September 4, 2026, with origin time 17:29 UTC. Coming 8 hours after a magnitude 3.3 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. | ||||||||
2026-09-04 2026-09-04 17:27:34 UTC | 2.6ml | 84 km SW of Nikolski, Alaska 52.491°, -169.873° | 24.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.6 earthquake 84 km SW of Nikolski, Alaska came in on September 4, 2026 at 17:27 UTC. The event was offshore. See the M2.6 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 September 4, 2026. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.