Earthquakes on September 20, 2025
225
EARTHQUAKES on September 20, 2025
24-hour UTC period · USGS data
LARGEST: M5.2 — South Sandwich Islands region
10 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
7
M4.0–4.9
63
M3.0–3.9
9
M2.0–2.9
20
M1.0–1.9
126
Activity Summary
225
Total earthquakes
~250
Daily average
Normal
Activity level
7
M5.0+ events
Geographic Breakdown
Top Countries (International)
Significant Earthquakes (M4.5+)
5.2
South Sandwich Islands region
15:31 UTC · 10.0 km deep
5.1
189 km SSE of Vilyuchinsk, Russia
10:18 UTC · 35.7 km deep
5.1
South Sandwich Islands region
07:28 UTC · 29.7 km deep
5.1
81 km E of Petropavlovsk-Kamchatsky, Russia
02:47 UTC · 69.3 km deep
Felt by 1
5.1
264 km S of Severo-Kuril’sk, Russia
01:28 UTC · 10.0 km deep
5.0
187 km E of Petropavlovsk-Kamchatsky, Russia
06:56 UTC · 10.0 km deep
5.0
164 km ESE of Petropavlovsk-Kamchatsky, Russia
01:29 UTC · 10.0 km deep
4.9
92 km SSE of Panguna, Papua New Guinea
14:06 UTC · 89.9 km deep
Earthquake Map — September 20, 2025
All Earthquakes — September 20, 2025
Showing 30 of 99 (filtered from 225)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2025-09-20 2025-09-20 23:30:31 UTC | 4.3mb | 168 km E of Petropavlovsk-Kamchatsky, Russia 52.972°, 161.128° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.3 event was detected 168 km E of Petropavlovsk-Kamchatsky, Russia on September 20, 2025, with origin time 23:30 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.0 earthquake that occurred about 17 hours earlier. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 23:23:55 UTC | 4.1mwr | 37 km E of Camiña, Chile -19.372°, -69.073° | 9.8 km | - | - | - | ✓ Reviewed | USGS → |
At 23:23 UTC on September 20, 2025, a magnitude 4.1 tremor occurred 37 km E of Camiña, Chile. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 23:16:23 UTC | 4.1mb | 15 km N of Simav, Turkey 39.229°, 28.970° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.1 earthquake 15 km N of Simav, Turkey at 23:16 UTC on September 20, 2025. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 22:13:05 UTC | 2.3md | 3 km SW of Indios, Puerto Rico 17.975°, -66.845° | 18.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.3 earthquake 3 km SW of Indios, Puerto Rico with origin time 22:13 UTC on September 20, 2025. Coming 8 hours after a magnitude 2.7 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 21:47:34 UTC | 4.4mb | 162 km SSE of Vilyuchinsk, Russia 51.567°, 159.248° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
At 21:47 UTC on September 20, 2025, a magnitude 4.4 tremor occurred 162 km SSE of Vilyuchinsk, Russia. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 21:47:23 UTC | 4.4mb | 14 km NE of Kuji, Japan 40.292°, 141.869° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.4 earthquake 14 km NE of Kuji, Japan at 21:47 UTC on September 20, 2025. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 21:28:07 UTC | 2.8md | 9 km SSW of Mariposa, CA 37.408°, -120.007° | 21.1 km | 32 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.8 earthquake was recorded 9 km SSW of Mariposa, CA on September 20, 2025 at 21:28 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 21:11:40 UTC | 4.2mb | 4 km SSE of San Terenziano, Italy 42.827°, 12.492° | 10.0 km | 6 | - | - | ✓ Reviewed | USGS → |
A magnitude 4.2 seismic event took place 4 km SSE of San Terenziano, Italy on September 20, 2025 at 21:11 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 20:37:56 UTC | 4.3mb | 162 km SE of Petropavlovsk-Kamchatsky, Russia 52.250°, 160.619° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.3 earthquake 162 km SE of Petropavlovsk-Kamchatsky, Russia came in on September 20, 2025 at 20:37 UTC. Coming 4 hours after a magnitude 4.4 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 20:29:46 UTC | 4.2mwr | 101 km SSE of Sand Point, Alaska 54.489°, -159.918° | 35.0 km | - | II | - | ✓ Reviewed | USGS → |
September 20, 2025 brought a magnitude 4.2 earthquake 101 km SSE of Sand Point, Alaska, logged at 20:29 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 20:01:18 UTC | 3.6mb | 66 km SW of Nikolski, Alaska 52.548°, -169.607° | 35.0 km | - | I | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.6 earthquake 66 km SW of Nikolski, Alaska with origin time 20:01 UTC on September 20, 2025. The event was offshore. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 19:45:18 UTC | 3.6md | 140 km N of Isabela, Puerto Rico 19.758°, -66.857° | 42.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 20, 2025, worldwide seismic activity registered a magnitude 3.6 earthquake 140 km N of Isabela, Puerto Rico at 19:45 UTC. The event was offshore. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 18:54:34 UTC | 4.3mb | 135 km SSW of Tambilil, Philippines 4.873°, 124.109° | 452.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 seismic event took place 135 km SSW of Tambilil, Philippines on September 20, 2025 at 18:54 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 18:30:00 UTC | 3.3ml | 22 km SSW of Nixon, Texas 29.073°, -97.812° | 5.8 km | 6 | - | - | ✓ Reviewed | USGS → |
This magnitude 3.3 event was detected 22 km SSW of Nixon, Texas on September 20, 2025, with origin time 18:30 UTC. In the 72 hours after this event, the USGS recorded 5 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 17:49:16 UTC | 4.5mb | 85 km SSW of Severo-Kuril’sk, Russia 49.949°, 155.714° | 82.5 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.5 event was detected 85 km SSW of Severo-Kuril’sk, Russia on September 20, 2025, with origin time 17:49 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 17:09:22 UTC | 4.8mb | 77 km E of Petropavlovsk-Kamchatsky, Russia 53.093°, 159.776° | 75.7 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.8 earthquake 77 km E of Petropavlovsk-Kamchatsky, Russia with origin time 17:09 UTC on September 20, 2025. It arrived roughly 14 hours after a larger magnitude 5.1 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 16:56:44 UTC | 4.4mb | 163 km ESE of Petropavlovsk-Kamchatsky, Russia 52.276°, 160.671° | 22.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.4 event was detected 163 km ESE of Petropavlovsk-Kamchatsky, Russia on September 20, 2025, with origin time 16:56 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 16:56:17 UTC | 4.6mb | Kermadec Islands region -31.871°, -178.649° | 39.2 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.6 earthquake in the Kermadec Islands region came in on September 20, 2025 at 16:56 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 16:47:45 UTC | 4.1mb | 16 km W of Cicurug, Indonesia -6.768°, 106.636° | 7.4 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.1 event was detected 16 km W of Cicurug, Indonesia on September 20, 2025, with origin time 16:47 UTC. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 16:39:41 UTC | 4.6mb | 88 km SE of Alo, Wallis and Futuna -14.908°, -177.561° | 377.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.6 seismic event took place 88 km SE of Alo, Wallis and Futuna on September 20, 2025 at 16:39 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 16:36:42 UTC | 4.6mb | 157 km E of Petropavlovsk-Kamchatsky, Russia 53.104°, 160.978° | 40.7 km | - | - | - | ✓ Reviewed | USGS → |
September 20, 2025 brought a magnitude 4.6 earthquake 157 km E of Petropavlovsk-Kamchatsky, Russia, logged at 16:36 UTC. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 16:07:54 UTC | 4.2mb | 79 km E of Petropavlovsk-Kamchatsky, Russia 53.016°, 159.806° | 67.1 km | - | - | - | ✓ Reviewed | USGS → |
On September 20, 2025 at 16:07 UTC, a magnitude 4.2 earthquake struck 79 km E of Petropavlovsk-Kamchatsky, Russia. It arrived roughly 13 hours after a larger magnitude 5.1 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. | ||||||||
2025-09-20 2025-09-20 15:41:49 UTC | 4.5mb | 71 km SSW of San Pedro de Atacama, Chile -23.448°, -68.581° | 104.8 km | 1 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.5 earthquake 71 km SSW of San Pedro de Atacama, Chile came in on September 20, 2025 at 15:41 UTC. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 15:38:28 UTC | 4.3mb | 195 km N of Kavieng, Papua New Guinea -0.825°, 150.551° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
September 20, 2025 brought a magnitude 4.3 earthquake 195 km N of Kavieng, Papua New Guinea, logged at 15:38 UTC. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 15:37:56 UTC | 4.4mb | 163 km SSE of Alo, Wallis and Futuna -15.608°, -177.383° | 422.5 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.4 earthquake 163 km SSE of Alo, Wallis and Futuna came in on September 20, 2025 at 15:37 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 15:31:09 UTC | 5.2mb | South Sandwich Islands region -58.059°, -24.622° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 20, 2025 at 15:31 UTC, a magnitude 5.2 earthquake struck in the South Sandwich Islands region. It is the largest earthquake currently listed for worldwide seismic activity on September 20, 2025. See the M5.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 15:15:12 UTC | 3.3ml | 51 km NNE of Venetie, Alaska 67.457°, -146.105° | 9.6 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.3 earthquake 51 km NNE of Venetie, Alaska came in on September 20, 2025 at 15:15 UTC. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 15:05:03 UTC | 4.5mb | 91 km E of Petropavlovsk-Kamchatsky, Russia 53.049°, 159.998° | 53.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 seismic event took place 91 km E of Petropavlovsk-Kamchatsky, Russia on September 20, 2025 at 15:05 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.1 earthquake that occurred about 12 hours earlier. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 14:44:03 UTC | 4.3mb | central Mid-Atlantic Ridge -0.968°, -21.963° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 20, 2025 at 14:44 UTC, a magnitude 4.3 earthquake struck near central Mid-Atlantic Ridge. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-09-20 2025-09-20 14:43:38 UTC | 2.1md | 24 km NW of Petrolia, CA 40.449°, -124.513° | 20.3 km | - | - | - | ✓ Reviewed | USGS → |
At 14:43 UTC on September 20, 2025, a magnitude 2.1 tremor occurred 24 km NW of Petrolia, CA. The event was offshore. See the M2.1 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 20, 2025. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.