Earthquakes on September 4, 2026
271
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+
6
M4.0–4.9
24
M3.0–3.9
22
M2.0–2.9
88
M1.0–1.9
131
Activity Summary
271
Total earthquakes
~250
Daily average
Normal
Activity level
6
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.5
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
38 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 Sandwich Islands region
06:45 UTC · 10.0 km deep
4.9
south of the Fiji Islands
13:47 UTC · 100.7 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 140 (filtered from 271)
(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 → |
On September 4, 2026, worldwide seismic activity registered a magnitude 2.6 earthquake near Rat Islands, Aleutian Islands, Alaska at 23:54 UTC. 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 → |
Seismographs logged a magnitude 2.9 earthquake 65 km N of Tierras Nuevas Poniente, Puerto Rico with origin time 23:37 UTC on September 4, 2026. 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 → |
On September 4, 2026, worldwide seismic activity registered a magnitude 2.0 earthquake 33 km WSW of Mentone, Texas at 23:33 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.1 earthquake that occurred about 19 hours earlier. 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 → |
A magnitude 2.7 earthquake was recorded 20 km S of South Van Horn, Alaska on September 4, 2026 at 23:31 UTC. 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 → |
Reports of a magnitude 2.5 earthquake 7 km WNW of Nikiski, Alaska came in 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 → |
A magnitude 2.5 seismic event took place 56 km S of Whites City, New Mexico on September 4, 2026 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 → |
At 22:39 UTC on September 4, 2026, a magnitude 2.0 tremor occurred 20 km S of Denali National Park, Alaska. 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 → |
On September 4, 2026 at 22:30 UTC, a magnitude 2.1 earthquake struck 9 km S of Honaunau-Napoopoo, Hawaii. 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 → |
A magnitude 2.1 earthquake was recorded 56 km S of Whites City, New Mexico on September 4, 2026 at 22:22 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.2 earthquake that occurred about 12 hours earlier. 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 → |
The USGS recorded this magnitude 2.0 earthquake 12 km SSE of Stonewall Gap, Colorado at 21:56 UTC on September 4, 2026. 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 → |
The USGS recorded this magnitude 2.2 earthquake 65 km ESE of Cantwell, Alaska at 21:15 UTC on September 4, 2026. 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 → |
The USGS recorded this magnitude 2.4 earthquake 86 km E of Akutan, Alaska at 20:55 UTC on September 4, 2026. 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 → |
On September 4, 2026, worldwide seismic activity registered a magnitude 3.5 earthquake 184 km SE of Perryville, Alaska at 19:49 UTC. 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 → |
On September 4, 2026, worldwide seismic activity registered a magnitude 2.3 earthquake 77 km N of White Mountain, Alaska at 19:46 UTC. 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 → |
At 19:40 UTC on September 4, 2026, a magnitude 2.6 tremor occurred 20 km WSW of Port Lions, Alaska. 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 → |
Reports of a magnitude 2.1 earthquake 11 km NE of Pāhala, Hawaii came in on September 4, 2026 at 18:20 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.5 earthquake that occurred about 6 hours earlier. 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 → |
This magnitude 3.0 event was detected 78 km ENE of Ugashik, Alaska on September 4, 2026, with origin time 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 → |
Seismographs logged a magnitude 2.3 earthquake 2 km N of The Geysers, CA with origin time 17:31 UTC on September 4, 2026. 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 → |
The USGS recorded this magnitude 2.6 earthquake 86 km SSW of Nikolski, Alaska at 17:29 UTC on September 4, 2026. This event falls inside the aftershock decay of a nearby magnitude 3.3 earthquake that occurred about 8 hours earlier. 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 → |
This magnitude 2.6 event was detected 84 km SW of Nikolski, Alaska on September 4, 2026, with origin time 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.