Earthquakes on August 18, 2025
212
EARTHQUAKES on August 18, 2025
24-hour UTC period · USGS data
LARGEST: M5.6 — south of Tonga
12 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
5
M4.0–4.9
49
M3.0–3.9
8
M2.0–2.9
41
M1.0–1.9
109
Activity Summary
212
Total earthquakes
~250
Daily average
Normal
Activity level
5
M5.0+ events
Significant Earthquakes (M4.5+)
5.6
south of Tonga
23:03 UTC · 12.0 km deep
5.6
Off the coast of Aisen, Chile
07:10 UTC · 10.0 km deep
Felt by 1
5.2
96 km NE of Hihifo, Tonga
07:48 UTC · 42.2 km deep
Felt by 3
5.1
20 km NW of Honchō, Japan
22:19 UTC · 128.4 km deep
5.0
199 km SSE of Vilyuchinsk, Russia
10:12 UTC · 9.7 km deep
4.9
180 km SSE of Vilyuchinsk, Russia
11:55 UTC · 10.0 km deep
4.9
60 km SE of Bitung, Indonesia
10:05 UTC · 73.1 km deep
4.9
88 km S of Severo-Kuril’sk, Russia
02:09 UTC · 80.0 km deep
Earthquake Map — August 18, 2025
All Earthquakes — August 18, 2025
Showing 30 of 103 (filtered from 212)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2025-08-18 2025-08-18 23:55:25 UTC | 4.2mb | 242 km ESE of Ozernovskiy, Russia 50.496°, 159.578° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
August 18, 2025 brought a magnitude 4.2 earthquake 242 km ESE of Ozernovskiy, Russia, logged at 23:55 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 23:07:39 UTC | 2.8ml | 15 km SSE of Atka, Alaska 52.076°, -174.072° | 75.1 km | - | - | - | ✓ Reviewed | USGS → |
On August 18, 2025, worldwide seismic activity registered a magnitude 2.8 earthquake 15 km SSE of Atka, Alaska at 23:07 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 23:03:09 UTC | 5.6mww | south of Tonga -24.373°, -175.969° | 12.0 km | - | - | green | ✓ Reviewed | USGS → |
On August 18, 2025 at 23:03 UTC, a magnitude 5.6 earthquake struck south of Tonga. 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 August 18, 2025. See the M5.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 22:58:38 UTC | 4.3mb | 173 km SSE of Honchō, Japan 40.738°, 143.859° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 seismic event took place 173 km SSE of Honchō, Japan on August 18, 2025 at 22:58 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 22:33:53 UTC | 3.2ml | 48 km NW of Toyah, Texas 31.646°, -104.131° | 1.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.2 seismic event took place 48 km NW of Toyah, Texas on August 18, 2025 at 22:33 UTC. 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. | ||||||||
2025-08-18 2025-08-18 22:19:22 UTC | 5.1mww | 20 km NW of Honchō, Japan 42.033°, 140.526° | 128.4 km | - | - | - | ✓ Reviewed | USGS → |
On August 18, 2025, worldwide seismic activity registered a magnitude 5.1 earthquake 20 km NW of Honchō, Japan at 22:19 UTC. The event was offshore. See the M5.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 22:17:22 UTC | 4.4mb | 51 km ESE of Tsunō, Japan 32.151°, 132.099° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.4 event was detected 51 km ESE of Tsunō, Japan on August 18, 2025, with origin time 22:17 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 21:16:00 UTC | 2.6ml | 34 km SW of Unalaska, Alaska 53.671°, -166.933° | 78.7 km | - | - | - | ✓ Reviewed | USGS → |
On August 18, 2025, worldwide seismic activity registered a magnitude 2.6 earthquake 34 km SW of Unalaska, Alaska at 21:16 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 20:54:07 UTC | 2.0ml | 88 km SSE of Sand Point, Alaska 54.609°, -159.943° | 21.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 88 km SSE of Sand Point, Alaska on August 18, 2025 at 20:54 UTC. Coming 18 hours after a magnitude 2.8 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 20:47:49 UTC | 3.4ml | 89 km SSE of Nikolski, Alaska 52.218°, -168.267° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.4 earthquake 89 km SSE of Nikolski, Alaska at 20:47 UTC on August 18, 2025. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 20:38:11 UTC | 4.7mb | 130 km NNE of Baukau, Timor Leste -7.328°, 126.722° | 398.1 km | 3 | - | - | ✓ Reviewed | USGS → |
A magnitude 4.7 earthquake was recorded 130 km NNE of Baukau, Timor Leste on August 18, 2025 at 20:38 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 20:30:45 UTC | 2.7ml | 96 km SSE of Nikolski, Alaska 52.114°, -168.407° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.7 earthquake was recorded 96 km SSE of Nikolski, Alaska on August 18, 2025 at 20:30 UTC. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 20:09:43 UTC | 3.4ml | 11 km ENE of Wright, Wyoming 43.784°, -105.363° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.4 event was detected 11 km ENE of Wright, Wyoming on August 18, 2025, with origin time 20:09 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 19:55:46 UTC | 4.3mwr | 30 km ENE of Hualien City, Taiwan 24.072°, 121.889° | 28.7 km | - | - | - | ✓ Reviewed | USGS → |
August 18, 2025 brought a magnitude 4.3 earthquake 30 km ENE of Hualien City, Taiwan, logged at 19:55 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 19:38:28 UTC | 4.3mwr | 10 km SSW of Anávra, Greece 39.108°, 22.036° | 20.0 km | 3 | - | - | ✓ Reviewed | USGS → |
On August 18, 2025 at 19:38 UTC, a magnitude 4.3 earthquake struck 10 km SSW of Anávra, Greece. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 19:25:34 UTC | 4.2mb | south of the Fiji Islands -24.778°, 179.610° | 521.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 18, 2025 at 19:25 UTC, a magnitude 4.2 earthquake struck south of the Fiji Islands. This is the deepest earthquake in the current dataset — a deep-focus event. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 19:20:40 UTC | 2.1ml | 109 km SSE of King Cove, Alaska 54.231°, -161.395° | 21.9 km | - | - | - | ✓ Reviewed | USGS → |
August 18, 2025 brought a magnitude 2.1 earthquake 109 km SSE of King Cove, Alaska, logged at 19:20 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 19:18:29 UTC | 3.1ml | 54 km SE of Adak, Alaska 51.475°, -176.164° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 18, 2025 at 19:18 UTC, a magnitude 3.1 earthquake struck 54 km SE of Adak, Alaska. The event was offshore. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 19:08:30 UTC | 3.1ml | 32 km SSE of Wright, Wyoming 43.482°, -105.347° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.1 earthquake was recorded 32 km SSE of Wright, Wyoming on August 18, 2025 at 19:08 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 18:41:18 UTC | 4.6mwr | 14 km NE of Ārt Khwājah, Afghanistan 37.176°, 69.603° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
On August 18, 2025, worldwide seismic activity registered a magnitude 4.6 earthquake 14 km NE of Ārt Khwājah, Afghanistan at 18:41 UTC. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 18:28:19 UTC | 2.8ml | 45 km SSE of Atka, Alaska 51.817°, -173.945° | 76.5 km | - | - | - | ✓ Reviewed | USGS → |
At 18:28 UTC on August 18, 2025, a magnitude 2.8 tremor occurred 45 km SSE of Atka, Alaska. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 18:22:28 UTC | 4.7mb | Off the coast of Aisen, Chile -44.441°, -80.232° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.7 earthquake near Off the coast of Aisen, Chile with origin time 18:22 UTC on August 18, 2025. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 18:10:58 UTC | 2.8ml | 20 km SSE of Wright, Wyoming 43.596°, -105.350° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.8 earthquake 20 km SSE of Wright, Wyoming at 18:10 UTC on August 18, 2025. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 18:05:46 UTC | 4.5mb | 61 km SE of Bitung, Indonesia 1.063°, 125.534° | 78.8 km | - | - | - | ✓ Reviewed | USGS → |
August 18, 2025 brought a magnitude 4.5 earthquake 61 km SE of Bitung, Indonesia, logged at 18:05 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.9 earthquake that occurred about 8 hours earlier. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 17:25:29 UTC | 2.1ml | 73 km ESE of Egegik, Alaska 57.853°, -156.329° | 130.5 km | - | - | - | ✓ Reviewed | USGS → |
On August 18, 2025 at 17:25 UTC, a magnitude 2.1 earthquake struck 73 km ESE of Egegik, Alaska. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 17:24:33 UTC | 2.5md | 84 km W of Petrolia, CA 40.414°, -125.274° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.5 earthquake 84 km W of Petrolia, CA at 17:24 UTC on August 18, 2025. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 17:24:16 UTC | 2.2ml | 12 km ESE of Lindsay, Texas 31.331°, -103.414° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.2 earthquake 12 km ESE of Lindsay, Texas with origin time 17:24 UTC on August 18, 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. | ||||||||
2025-08-18 2025-08-18 16:55:54 UTC | 2.0ml | 93 km SSE of Sand Point, Alaska 54.580°, -159.865° | 26.6 km | - | - | - | ✓ Reviewed | USGS → |
August 18, 2025 brought a magnitude 2.0 earthquake 93 km SSE of Sand Point, Alaska, logged at 16:55 UTC. It arrived roughly 14 hours after a larger magnitude 2.8 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. | ||||||||
2025-08-18 2025-08-18 16:55:33 UTC | 2.1ml | 60 km W of Hooper, Utah 41.072°, -112.828° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 60 km W of Hooper, Utah on August 18, 2025 at 16:55 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2025-08-18 2025-08-18 16:48:24 UTC | 2.8ml | 8 km NE of Nikolski, Alaska 52.985°, -168.756° | 74.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.8 event was detected 8 km NE of Nikolski, Alaska on August 18, 2025, with origin time 16:48 UTC. The event was offshore. See the M2.8 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 August 18, 2025. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.