Earthquakes on September 21, 2026
282
EARTHQUAKES on September 21, 2026
24-hour UTC period · USGS data
10 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
5
M4.0–4.9
25
M3.0–3.9
12
M2.0–2.9
76
M1.0–1.9
164
Activity Summary
282
Total earthquakes
~250
Daily average
Normal
Activity level
5
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.5
35 km NNE of Ruteng, Indonesia
01:41 UTC · 10.0 km deep
5.3
96 km S of Sarangani, Philippines
23:48 UTC · 10.0 km deep
5.2
167 km WNW of Mejillones, Chile
11:48 UTC · 10.0 km deep
Felt by 1
5.0
South Sandwich Islands region
21:37 UTC · 10.0 km deep
5.0
34 km WNW of Luwuk, Indonesia
07:31 UTC · 9.9 km deep
4.9
26 km SE of Saimbeyli, Turkey
01:02 UTC · 10.0 km deep
Felt by 2
4.7
40 km E of Nobeoka, Japan
13:38 UTC · 46.2 km deep
4.7
76 km W of Ollagüe, Chile
12:17 UTC · 121.2 km deep
Earthquake Map — September 21, 2026
All Earthquakes — September 21, 2026
Showing 30 of 118 (filtered from 282)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2026-09-21 2026-09-21 23:50:41 UTC | 2.2ml | 20 km N of Four Mile Road, Alaska 64.785°, -149.145° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 20 km N of Four Mile Road, Alaska on September 21, 2026 at 23:50 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. | ||||||||
2026-09-21 2026-09-21 23:48:13 UTC | 5.3mb | 96 km S of Sarangani, Philippines 4.536°, 125.344° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 5.3 earthquake was recorded 96 km S of Sarangani, Philippines on September 21, 2026 at 23:48 UTC. The event was offshore. See the M5.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 23:39:42 UTC | 2.5ml | 23 km NE of Hawthorne, Nevada 38.698°, -118.475° | 8.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 seismic event took place 23 km NE of Hawthorne, Nevada on September 21, 2026 at 23:39 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 23:29:20 UTC | 3.3ml | 65 km SE of Akutan, Alaska 53.672°, -165.158° | 34.5 km | - | I | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.3 earthquake 65 km SE of Akutan, Alaska came in on September 21, 2026 at 23:29 UTC. The event was offshore. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 23:15:33 UTC | 4.4mb | 23 km SSW of Roncesvalles, Colombia 3.816°, -75.682° | 13.3 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.4 earthquake 23 km SSW of Roncesvalles, Colombia came in on September 21, 2026 at 23:15 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 23:14:44 UTC | 2.5ml | 17 km NNE of Arctic Village, Alaska 68.262°, -145.326° | 7.1 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.5 earthquake 17 km NNE of Arctic Village, Alaska at 23:14 UTC on September 21, 2026. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 23:08:02 UTC | 2.5md | 12 km W of Lake Nacimiento, CA 35.721°, -121.017° | 5.2 km | 2 | - | - | ✓ Reviewed | USGS → |
At 23:08 UTC on September 21, 2026, a magnitude 2.5 tremor occurred 12 km W of Lake Nacimiento, CA. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 23:02:51 UTC | 2.1ml | 90 km SW of Adak, Alaska 51.404°, -177.708° | 32.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 90 km SW of Adak, Alaska on September 21, 2026 at 23:02 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 22:58:21 UTC | 4.2mb | 2 km E of Roncesvalles, Colombia 4.009°, -75.584° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.2 earthquake 2 km E of Roncesvalles, Colombia with origin time 22:58 UTC on September 21, 2026. This event falls inside the aftershock decay of a nearby magnitude 4.5 earthquake that occurred about 4 hours earlier. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 22:41:51 UTC | 2.3md | 25 km W of Petrolia, CA 40.307°, -124.577° | 9.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 seismic event took place 25 km W of Petrolia, CA on September 21, 2026 at 22:41 UTC. It arrived roughly 4 hours after a larger magnitude 2.8 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 22:32:46 UTC | 2.5ml | 18 km WSW of Dutch Harbor, Alaska 53.848°, -166.821° | 9.7 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.5 event was detected 18 km WSW of Dutch Harbor, Alaska on September 21, 2026, with origin time 22:32 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 22:29:59 UTC | 4.5mb | 91 km E of Namie, Japan 37.525°, 142.036° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.5 earthquake 91 km E of Namie, Japan with origin time 22:29 UTC on September 21, 2026. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 22:24:59 UTC | 2.4ml | 54 km W of Anchor Point, Alaska 59.851°, -152.796° | 106.3 km | - | - | - | ✓ Reviewed | USGS → |
September 21, 2026 brought a magnitude 2.4 earthquake 54 km W of Anchor Point, Alaska, logged at 22:24 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 22:01:55 UTC | 4.4mb | 103 km SW of Brisas Barra de Suchiate, Mexico 13.813°, -92.834° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 seismic event took place 103 km SW of Brisas Barra de Suchiate, Mexico on September 21, 2026 at 22:01 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 21:37:04 UTC | 5.0mb | South Sandwich Islands region -56.518°, -24.161° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 21, 2026, worldwide seismic activity registered a magnitude 5.0 earthquake in the South Sandwich Islands region at 21:37 UTC. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 21:17:48 UTC | 2.8ml | 40 km SSW of Skwentna, Alaska 61.652°, -151.660° | 101.7 km | 1 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.8 earthquake 40 km SSW of Skwentna, Alaska at 21:17 UTC on September 21, 2026. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 21:04:55 UTC | 2.0ml | 79 km ENE of Adak, Alaska 52.261°, -175.667° | 243.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 79 km ENE of Adak, Alaska on September 21, 2026 at 21:04 UTC. It arrived roughly 19 hours after a larger magnitude 2.6 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. | ||||||||
2026-09-21 2026-09-21 20:53:15 UTC | 4.4mb | Fiji region -19.167°, -177.591° | 583.7 km | - | - | - | ✓ Reviewed | USGS → |
September 21, 2026 brought a magnitude 4.4 earthquake in the Fiji region, logged at 20:53 UTC. This is the deepest earthquake in the current dataset — a deep-focus event. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 20:34:32 UTC | 4.6mb | Kermadec Islands region -28.701°, -176.441° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 21, 2026 at 20:34 UTC, a magnitude 4.6 earthquake struck in the Kermadec Islands region. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 19:54:33 UTC | 2.0ml | 64 km NW of Petersville, Alaska 62.916°, -151.622° | 8.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 64 km NW of Petersville, Alaska with origin time 19:54 UTC on September 21, 2026. This event falls inside the aftershock decay of a nearby magnitude 2.1 earthquake that occurred about 16 hours earlier. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 19:39:31 UTC | 2.4ml | 94 km WSW of Karluk, Alaska 57.229°, -155.888° | 65.8 km | - | - | - | ✓ Reviewed | USGS → |
On September 21, 2026 at 19:39 UTC, a magnitude 2.4 earthquake struck 94 km WSW of Karluk, Alaska. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 19:32:47 UTC | 3.1ml | 76 km WSW of Akhiok, Alaska 56.705°, -155.345° | 42.0 km | - | - | - | ✓ Reviewed | USGS → |
September 21, 2026 brought a magnitude 3.1 earthquake 76 km WSW of Akhiok, Alaska, logged at 19:32 UTC. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 19:24:38 UTC | 2.0ml | 63 km NW of Petersville, Alaska 62.911°, -151.609° | 2.6 km | - | - | - | ✓ Reviewed | USGS → |
On September 21, 2026, worldwide seismic activity registered a magnitude 2.0 earthquake 63 km NW of Petersville, Alaska at 19:24 UTC. Coming 15 hours after a magnitude 2.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. 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. | ||||||||
2026-09-21 2026-09-21 18:58:13 UTC | 2.6ml | 3 km SW of Pāhala, Hawaii 19.180°, -155.508° | 31.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 21, 2026, worldwide seismic activity registered a magnitude 2.6 earthquake 3 km SW of Pāhala, Hawaii at 18:58 UTC. It arrived roughly 5 hours after a larger magnitude 2.6 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 18:54:41 UTC | 2.8md | 19 km WSW of Petrolia, CA 40.284°, -124.505° | 7.0 km | 2 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.8 event was detected 19 km WSW of Petrolia, CA on September 21, 2026, with origin time 18:54 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 M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 18:48:44 UTC | 4.5mb | 1 km SE of San Antonio, Colombia 3.903°, -75.469° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
On September 21, 2026, worldwide seismic activity registered a magnitude 4.5 earthquake 1 km SE of San Antonio, Colombia at 18:48 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 18:26:49 UTC | 3.8ml | 163 km S of Akhiok, Alaska 55.479°, -154.076° | 20.0 km | - | I | - | ✓ Reviewed | USGS → |
On September 21, 2026 at 18:26 UTC, a magnitude 3.8 earthquake struck 163 km S of Akhiok, Alaska. The event was offshore. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 18:14:09 UTC | 2.1ml | 93 km E of King Salmon, Alaska 58.584°, -155.064° | 136.0 km | - | - | - | ✓ Reviewed | USGS → |
September 21, 2026 brought a magnitude 2.1 earthquake 93 km E of King Salmon, Alaska, logged at 18:14 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 17:38:42 UTC | 4.5mb | 116 km SE of Ollagüe, Chile -22.043°, -67.539° | 193.2 km | - | - | - | ✓ Reviewed | USGS → |
At 17:38 UTC on September 21, 2026, a magnitude 4.5 tremor occurred 116 km SE of Ollagüe, Chile. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 17:33:36 UTC | 4.2mb | 231 km SW of Merizo Village, Guam 11.689°, 143.267° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 21, 2026, worldwide seismic activity registered a magnitude 4.2 earthquake 231 km SW of Merizo Village, Guam at 17:33 UTC. The event was offshore. See the M4.2 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 21, 2026. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.