Earthquakes on August 18, 2026
306
EARTHQUAKES on August 18, 2026
24-hour UTC period · USGS data
10 km deep · 2 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
4
M4.0–4.9
60
M3.0–3.9
15
M2.0–2.9
77
M1.0–1.9
150
Activity Summary
306
Total earthquakes
~250
Daily average
Elevated
Activity level
4
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.8
98 km SW of Puerto Madero, Mexico
05:02 UTC · 10.0 km deep
Felt by 2
5.6
145 km SSE of Teluk Dalam, Indonesia
06:02 UTC · 10.0 km deep
5.5
269 km SSE of Dunhuang, China
21:36 UTC · 6.0 km deep
5.2
52 km SSW of Jurm, Afghanistan
19:51 UTC · 215.0 km deep
Felt by 2
4.9
77 km NW of Ende, Indonesia
20:15 UTC · 10.0 km deep
4.9
72 km NW of Ende, Indonesia
19:03 UTC · 10.0 km deep
4.9
81 km NNE of Ruteng, Indonesia
12:00 UTC · 10.0 km deep
4.9
85 km N of Ruteng, Indonesia
09:01 UTC · 10.0 km deep
Earthquake Map — August 18, 2026
All Earthquakes — August 18, 2026
Showing 30 of 156 (filtered from 306)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2026-08-18 2026-08-18 23:59:16 UTC | 4.6mb | 75 km NW of Ende, Indonesia -8.290°, 121.263° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
August 18, 2026 brought a magnitude 4.6 earthquake 75 km NW of Ende, Indonesia, logged at 23:59 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.9 earthquake that occurred about 4 hours earlier. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 23:59:09 UTC | 2.7ml | 52 km S of Cantwell, Alaska 62.926°, -148.851° | 64.7 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.7 earthquake 52 km S of Cantwell, Alaska with origin time 23:59 UTC on August 18, 2026. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 23:58:32 UTC | 2.4md | 3 km S of Pāhala, Hawaii 19.170°, -155.482° | 29.9 km | - | - | - | Auto | USGS → |
A magnitude 2.4 earthquake was recorded 3 km S of Pāhala, Hawaii on August 18, 2026 at 23:58 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.6 earthquake that occurred about 10 hours earlier. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 23:53:51 UTC | 4.2mb | 280 km WNW of Houma, Tonga -20.122°, -177.757° | 505.6 km | - | - | - | ✓ Reviewed | USGS → |
On August 18, 2026, worldwide seismic activity registered a magnitude 4.2 earthquake 280 km WNW of Houma, Tonga at 23:53 UTC. Coming 7 hours after a magnitude 4.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 23:52:50 UTC | 2.3md | 2 km WSW of Tallaboa, Puerto Rico 17.989°, -66.737° | 14.1 km | - | - | - | ✓ Reviewed | USGS → |
At 23:52 UTC on August 18, 2026, a magnitude 2.3 tremor occurred 2 km WSW of Tallaboa, Puerto Rico. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 23:39:23 UTC | 4.3mb | 65 km ENE of Ruteng, Indonesia -8.460°, 121.038° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 earthquake was recorded 65 km ENE of Ruteng, Indonesia on August 18, 2026 at 23:39 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 23:34:58 UTC | 2.2ml | 8 km E of Loomis, Washington 48.808°, -119.525° | 17.9 km | - | - | - | ✓ Reviewed | USGS → |
August 18, 2026 brought a magnitude 2.2 earthquake 8 km E of Loomis, Washington, logged at 23:34 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 22:54:27 UTC | 2.8ml | 194 km SSE of Atka, Alaska 50.711°, -172.720° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.8 seismic event took place 194 km SSE of Atka, Alaska on August 18, 2026 at 22:54 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 22:34:49 UTC | 2.2ml | 73 km SE of Adak, Alaska 51.344°, -175.992° | 18.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.2 earthquake 73 km SE of Adak, Alaska with origin time 22:34 UTC on August 18, 2026. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 22:32:49 UTC | 4.2mb | 17 km NE of Labuan Bajo, Indonesia -8.367°, 119.984° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 22:32 UTC on August 18, 2026, a magnitude 4.2 tremor occurred 17 km NE of Labuan Bajo, Indonesia. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 22:31:10 UTC | 4.3mb | Chagos Archipelago region -5.006°, 68.498° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.3 earthquake in the Chagos Archipelago region with origin time 22:31 UTC on August 18, 2026. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 22:26:55 UTC | 4.5mb | 60 km N of Ruteng, Indonesia -8.064°, 120.438° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.5 event was detected 60 km N of Ruteng, Indonesia on August 18, 2026, with origin time 22:26 UTC. Coming 10 hours after a magnitude 4.8 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 22:00:08 UTC | 2.2ml | 30 km WNW of Susitna, Alaska 61.686°, -151.007° | 74.9 km | 1 | - | - | ✓ Reviewed | USGS → |
On August 18, 2026, worldwide seismic activity registered a magnitude 2.2 earthquake 30 km WNW of Susitna, Alaska at 22:00 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 21:59:55 UTC | 4.4mb | 274 km SSE of Dunhuang, China 37.758°, 95.414° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.4 earthquake 274 km SSE of Dunhuang, China with origin time 21:59 UTC on August 18, 2026. Coming 1 hours after a magnitude 5.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 21:54:59 UTC | 2.6md | 11 km SW of Round Valley, CA 37.346°, -118.691° | 14.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.6 earthquake 11 km SW of Round Valley, CA with origin time 21:54 UTC on August 18, 2026. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 21:36:27 UTC | 5.5mwb | 269 km SSE of Dunhuang, China 37.843°, 95.571° | 6.0 km | - | VI | green | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 5.5 earthquake 269 km SSE of Dunhuang, China with origin time 21:36 UTC on August 18, 2026. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M5.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 21:13:08 UTC | 4.3mb | 40 km NE of Ruteng, Indonesia -8.374°, 120.749° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 18, 2026, worldwide seismic activity registered a magnitude 4.3 earthquake 40 km NE of Ruteng, Indonesia at 21:13 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.4 earthquake that occurred about 3 hours earlier. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 21:12:42 UTC | 2.2ml | 34 km SW of Nanwalek, Alaska 59.159°, -152.380° | 61.1 km | - | - | - | ✓ Reviewed | USGS → |
At 21:12 UTC on August 18, 2026, a magnitude 2.2 tremor occurred 34 km SW of Nanwalek, Alaska. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 21:11:40 UTC | 4.7mb | 80 km NNW of Ende, Indonesia -8.160°, 121.408° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 18, 2026, worldwide seismic activity registered a magnitude 4.7 earthquake 80 km NNW of Ende, Indonesia at 21:11 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 21:06:16 UTC | 2.7ml | 112 km SE of Atka, Alaska 51.403°, -173.189° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 18, 2026, worldwide seismic activity registered a magnitude 2.7 earthquake 112 km SE of Atka, Alaska at 21:06 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 20:56:40 UTC | 2.9ml | 7 km WSW of Point MacKenzie, Alaska 61.332°, -150.110° | 38.1 km | 10 | - | - | ✓ Reviewed | USGS → |
On August 18, 2026 at 20:56 UTC, a magnitude 2.9 earthquake struck 7 km WSW of Point MacKenzie, Alaska. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 20:54:00 UTC | 2.0ml | 53 km E of Denali National Park, Alaska 63.577°, -150.649° | 3.6 km | - | - | - | ✓ Reviewed | USGS → |
On August 18, 2026 at 20:54 UTC, a magnitude 2.0 earthquake struck 53 km E 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. | ||||||||
2026-08-18 2026-08-18 20:50:15 UTC | 4.7mb | 60 km NNW of Ende, Indonesia -8.312°, 121.513° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 20:50 UTC on August 18, 2026, a magnitude 4.7 tremor occurred 60 km NNW of Ende, Indonesia. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 20:46:23 UTC | 2.6ml | 150 km E of Atka, Alaska 51.993°, -172.030° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 18, 2026, worldwide seismic activity registered a magnitude 2.6 earthquake 150 km E of Atka, Alaska at 20:46 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 20:37:58 UTC | 2.1ml | 48 km SSE of Nelchina, Alaska 61.594°, -146.398° | 23.5 km | - | - | - | ✓ Reviewed | USGS → |
On August 18, 2026 at 20:37 UTC, a magnitude 2.1 earthquake struck 48 km SSE of Nelchina, Alaska. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 20:33:00 UTC | 2.1ml | 43 km SE of Perryville, Alaska 55.588°, -158.755° | 54.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 43 km SE of Perryville, Alaska on August 18, 2026 at 20:33 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 20:31:40 UTC | 4.3mb | 5 km S of Ruteng, Indonesia -8.664°, 120.455° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 20:31 UTC on August 18, 2026, a magnitude 4.3 tremor occurred 5 km S of Ruteng, Indonesia. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 20:28:55 UTC | 4.7mb | 77 km NW of Ende, Indonesia -8.336°, 121.179° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.7 earthquake 77 km NW of Ende, Indonesia at 20:28 UTC on August 18, 2026. It arrived roughly 1 hours after a larger magnitude 4.9 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 20:25:38 UTC | 2.4ml | 10 km NE of Niland, CA 33.312°, -115.459° | 9.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.4 event was detected 10 km NE of Niland, CA on August 18, 2026, with origin time 20:25 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 20:19:42 UTC | 4.4mb | 43 km N of Ruteng, Indonesia -8.216°, 120.454° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 18, 2026, worldwide seismic activity registered a magnitude 4.4 earthquake 43 km N of Ruteng, Indonesia at 20:19 UTC. The event was offshore. See the M4.4 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, 2026. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.