Earthquakes on September 21, 2025
206
EARTHQUAKES on September 21, 2025
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
52
M3.0–3.9
10
M2.0–2.9
24
M1.0–1.9
115
Activity Summary
206
Total earthquakes
~250
Daily average
Normal
Activity level
5
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.6
166 km E of Petropavlovsk-Kamchatsky, Russia
01:13 UTC · 10.0 km deep
5.5
122 km SW of Adak, Alaska
09:30 UTC · 30.0 km deep
Felt by 4
5.2
northern Mid-Atlantic Ridge
16:59 UTC · 10.0 km deep
5.1
8 km SW of Sındırgı, Turkey
21:05 UTC · 10.0 km deep
Felt by 25
5.1
139 km SE of Petropavlovsk-Kamchatsky, Russia
03:20 UTC · 27.5 km deep
4.9
25 km WSW of Abriaquí, Colombia
20:17 UTC · 10.0 km deep
Felt by 12
4.9
north of Severnaya Zemlya
15:19 UTC · 10.0 km deep
4.9
northwest of Australia
07:34 UTC · 10.0 km deep
Earthquake Map — September 21, 2025
All Earthquakes — September 21, 2025
Showing 30 of 91 (filtered from 206)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2025-09-21 2025-09-21 23:55:52 UTC | 2.4md | 5 km SW of Guánica, Puerto Rico 17.936°, -66.941° | 10.5 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.4 event was detected 5 km SW of Guánica, Puerto Rico on September 21, 2025, with origin time 23:55 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.5 earthquake that occurred about 19 hours earlier. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 23:50:53 UTC | 4.2mb | 186 km E of Petropavlovsk-Kamchatsky, Russia 53.091°, 161.410° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.2 earthquake 186 km E of Petropavlovsk-Kamchatsky, Russia at 23:50 UTC on September 21, 2025. It arrived roughly 22 hours after a larger magnitude 4.5 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 23:28:57 UTC | 4.2mb | 106 km ESE of Petropavlovsk-Kamchatsky, Russia 52.645°, 160.052° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.2 event was detected 106 km ESE of Petropavlovsk-Kamchatsky, Russia on September 21, 2025, with origin time 23:28 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.3 earthquake that occurred about 19 hours earlier. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 23:18:23 UTC | 3.8md | 34 km SSW of Boca de Yuma, Dominican Republic 18.075°, -68.699° | 122.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.8 seismic event took place 34 km SSW of Boca de Yuma, Dominican Republic on September 21, 2025 at 23:18 UTC. See the M3.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 23:16:59 UTC | 2.4ml | 17 km NNW of Susitna, Alaska 61.697°, -150.577° | 34.9 km | - | - | - | Auto | USGS → |
Reports of a magnitude 2.4 earthquake 17 km NNW of Susitna, Alaska came in on September 21, 2025 at 23:16 UTC. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 22:50:53 UTC | 4.6mb | 166 km E of Petropavlovsk-Kamchatsky, Russia 52.810°, 161.067° | 26.4 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.6 earthquake 166 km E of Petropavlovsk-Kamchatsky, Russia with origin time 22:50 UTC on September 21, 2025. It arrived roughly 22 hours after a larger magnitude 5.6 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 22:23:30 UTC | 2.3ml | 3 km NE of Heber, CA 32.752°, -115.504° | 15.9 km | 4 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.3 earthquake 3 km NE of Heber, CA with origin time 22:23 UTC on September 21, 2025. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 22:15:53 UTC | 2.2md | 5 km NW of The Geysers, CA 38.807°, -122.795° | 3.1 km | - | - | - | Auto | USGS → |
The USGS recorded this magnitude 2.2 earthquake 5 km NW of The Geysers, CA at 22:15 UTC on September 21, 2025. 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. | ||||||||
2025-09-21 2025-09-21 21:54:36 UTC | 4.5mb | 102 km E of Ozernovskiy, Russia 51.572°, 157.977° | 79.3 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.5 earthquake 102 km E of Ozernovskiy, Russia came in on September 21, 2025 at 21:54 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 21:53:11 UTC | 2.3ml | 40 km SSE of Magrath, Canada 49.086°, -112.640° | 29.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 seismic event took place 40 km SSE of Magrath, Canada on September 21, 2025 at 21:53 UTC. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 21:43:44 UTC | 2.0ml | 12 km NNE of Pāhala, Hawaii 19.308°, -155.423° | 28.9 km | - | - | - | ✓ Reviewed | USGS → |
On September 21, 2025 at 21:43 UTC, a magnitude 2.0 earthquake struck 12 km NNE of Pāhala, Hawaii. It arrived roughly 1 hours after a larger magnitude 2.4 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. | ||||||||
2025-09-21 2025-09-21 21:40:42 UTC | 2.4ml | 14 km NNE of Pāhala, Hawaii 19.319°, -155.423° | 28.2 km | - | - | - | Auto | USGS → |
The USGS recorded this magnitude 2.4 earthquake 14 km NNE of Pāhala, Hawaii at 21:40 UTC on September 21, 2025. 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 M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 21:40:42 UTC | 2.1ml | 12 km NNE of Pāhala, Hawaii 19.302°, -155.419° | 30.4 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 12 km NNE of Pāhala, Hawaii on September 21, 2025, with origin time 21:40 UTC. Coming 2 hours after a magnitude 2.3 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 21:06:54 UTC | 2.8md | 2 km NE of San Germán, Puerto Rico 18.102°, -67.027° | 10.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.8 seismic event took place 2 km NE of San Germán, Puerto Rico on September 21, 2025 at 21:06 UTC. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 21:05:46 UTC | 5.1mww | 8 km SW of Sındırgı, Turkey 39.184°, 28.110° | 10.0 km | 25 | - | - | ✓ Reviewed | USGS → |
On September 21, 2025, worldwide seismic activity registered a magnitude 5.1 earthquake 8 km SW of Sındırgı, Turkey at 21:05 UTC. The event was offshore. See the M5.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 20:36:11 UTC | 4.1mb | 204 km ESE of Ozernovskiy, Russia 50.679°, 159.117° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.1 earthquake was recorded 204 km ESE of Ozernovskiy, Russia on September 21, 2025 at 20:36 UTC. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 20:17:56 UTC | 4.9mb | 25 km WSW of Abriaquí, Colombia 6.524°, -76.264° | 10.0 km | 12 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.9 earthquake 25 km WSW of Abriaquí, Colombia at 20:17 UTC on September 21, 2025. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 20:05:08 UTC | 4.4mb | northern Mid-Atlantic Ridge 30.143°, -43.212° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.4 earthquake near northern Mid-Atlantic Ridge at 20:05 UTC on September 21, 2025. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 19:33:01 UTC | 2.1ml | 6 km WNW of Coupeville, Washington 48.239°, -122.764° | 23.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 6 km WNW of Coupeville, Washington on September 21, 2025 at 19:33 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 19:20:14 UTC | 4.5mb | 15 km E of Lugu, Taiwan 23.767°, 120.903° | 28.9 km | 2 | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 seismic event took place 15 km E of Lugu, Taiwan on September 21, 2025 at 19:20 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 19:13:58 UTC | 2.3ml | 10 km SSE of Pāhala, Hawaii 19.124°, -155.429° | 28.8 km | - | - | - | ✓ Reviewed | USGS → |
September 21, 2025 brought a magnitude 2.3 earthquake 10 km SSE of Pāhala, Hawaii, logged at 19:13 UTC. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 19:05:00 UTC | 3.2ml | 18 km ENE of Wright, Wyoming 43.836°, -105.299° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.2 earthquake 18 km ENE of Wright, Wyoming at 19:05 UTC on September 21, 2025. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 18:02:27 UTC | 3.5md | 87 km NE of Punta Cana, Dominican Republic 19.072°, -67.749° | 44.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.5 earthquake 87 km NE of Punta Cana, Dominican Republic with origin time 18:02 UTC on September 21, 2025. The event was offshore. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 17:54:02 UTC | 4.3mb | 166 km ESE of Petropavlovsk-Kamchatsky, Russia 52.715°, 161.027° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 21, 2025 at 17:54 UTC, a magnitude 4.3 earthquake struck 166 km ESE of Petropavlovsk-Kamchatsky, Russia. It arrived roughly 2 hours after a larger magnitude 4.7 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 17:21:49 UTC | 4.3mb | 10 km WSW of Caracoto, Peru -15.596°, -70.201° | 239.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 earthquake was recorded 10 km WSW of Caracoto, Peru on September 21, 2025 at 17:21 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 17:06:38 UTC | 4.3mb | 31 km NNE of Tasiilaq, Greenland 65.889°, -37.490° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.3 earthquake 31 km NNE of Tasiilaq, Greenland with origin time 17:06 UTC on September 21, 2025. Coming 4 hours after a magnitude 4.6 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 16:59:27 UTC | 5.2mww | northern Mid-Atlantic Ridge 29.593°, -42.533° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 5.2 earthquake near northern Mid-Atlantic Ridge with origin time 16:59 UTC on September 21, 2025. See the M5.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 16:54:58 UTC | 3.1ml | 116 km SSW of McCarthy, Alaska 60.424°, -143.478° | 7.1 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.1 event was detected 116 km SSW of McCarthy, Alaska on September 21, 2025, with origin time 16:54 UTC. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 15:54:58 UTC | 4.5mb | 31 km N of Tasiilaq, Greenland 65.894°, -37.529° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
September 21, 2025 brought a magnitude 4.5 earthquake 31 km N of Tasiilaq, Greenland, logged at 15:54 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.6 earthquake that occurred about 2 hours earlier. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-21 2025-09-21 15:38:47 UTC | 4.7mb | 167 km E of Petropavlovsk-Kamchatsky, Russia 52.869°, 161.093° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 21, 2025 at 15:38 UTC, a magnitude 4.7 earthquake struck 167 km E of Petropavlovsk-Kamchatsky, Russia. This event falls inside the aftershock decay of a nearby magnitude 5.6 earthquake that occurred about 14 hours earlier. The event was offshore. See the M4.7 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, 2025. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.