Earthquakes on August 18, 2026
309
EARTHQUAKES on August 18, 2026
24-hour UTC period · USGS data
9 km deep · 2 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
4
M4.0–4.9
63
M3.0–3.9
16
M2.0–2.9
75
M1.0–1.9
151
Activity Summary
309
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
102 km SW of Puerto Madero, Mexico
05:02 UTC · 9.0 km deep
Felt by 2
5.6
269 km SSE of Dunhuang, China
21:36 UTC · 6.0 km deep
5.6
143 km SSE of Teluk Dalam, Indonesia
06:02 UTC · 10.0 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 158 (filtered from 309)
(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 23:59:13 UTC | 4.6mb | 71 km NW of Ende, Indonesia -8.324°, 121.274° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
August 18, 2026 brought a magnitude 4.6 earthquake 71 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 → |
This magnitude 2.7 event was detected 52 km S of Cantwell, Alaska on August 18, 2026, with origin time 23:59 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 23:53:51 UTC | 4.2mb | 280 km WNW of Houma, Tonga -20.122°, -177.757° | 505.6 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.2 event was detected 280 km WNW of Houma, Tonga on August 18, 2026, with origin time 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 → |
This magnitude 2.3 event was detected 2 km WSW of Tallaboa, Puerto Rico on August 18, 2026, with origin time 23:52 UTC. 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 → |
At 23:39 UTC on August 18, 2026, a magnitude 4.3 tremor occurred 65 km ENE of Ruteng, Indonesia. 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 → |
On August 18, 2026 at 23:34 UTC, a magnitude 2.2 earthquake struck 8 km E of Loomis, Washington. 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 → |
Seismographs logged a magnitude 2.8 earthquake 194 km SSE of Atka, Alaska with origin time 22:54 UTC on August 18, 2026. 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 → |
On August 18, 2026, worldwide seismic activity registered a magnitude 2.2 earthquake 73 km SE of Adak, Alaska at 22:34 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 22:32:49 UTC | 4.2mb | 17 km NE of Labuan Bajo, Indonesia -8.367°, 119.984° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.2 earthquake 17 km NE of Labuan Bajo, Indonesia came in on August 18, 2026 at 22:32 UTC. 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 -4.998°, 68.492° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.3 earthquake in the Chagos Archipelago region at 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 22:26:51 UTC | 4.5mb | 56 km N of Ruteng, Indonesia -8.104°, 120.425° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.5 event was detected 56 km N of Ruteng, Indonesia on August 18, 2026, with origin time 22:26 UTC. Coming 20 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 → |
At 22:00 UTC on August 18, 2026, a magnitude 2.2 tremor occurred 30 km WNW of Susitna, Alaska. 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 → |
The USGS recorded this magnitude 4.4 earthquake 274 km SSE of Dunhuang, China at 21:59 UTC on August 18, 2026. Coming 1 hours after a magnitude 5.6 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 → |
This magnitude 2.6 event was detected 11 km SW of Round Valley, CA on August 18, 2026, with origin time 21:54 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 21:36:27 UTC | 5.6mww | 269 km SSE of Dunhuang, China 37.836°, 95.545° | 6.0 km | - | VI | green | ✓ Reviewed | USGS → |
A magnitude 5.6 earthquake was recorded 269 km SSE of Dunhuang, China on August 18, 2026 at 21:36 UTC. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M5.6 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 → |
This magnitude 4.3 event was detected 40 km NE of Ruteng, Indonesia on August 18, 2026, with origin time 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 → |
The USGS recorded this magnitude 2.2 earthquake 34 km SW of Nanwalek, Alaska at 21:12 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 21:11:40 UTC | 4.7mb | 82 km NNW of Ende, Indonesia -8.127°, 121.443° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 18, 2026, worldwide seismic activity registered a magnitude 4.7 earthquake 82 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 → |
Reports of a magnitude 2.7 earthquake 112 km SE of Atka, Alaska came in on August 18, 2026 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 → |
At 20:56 UTC on August 18, 2026, a magnitude 2.9 tremor occurred 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 → |
Seismographs logged a magnitude 2.0 earthquake 53 km E of Denali National Park, Alaska with origin time 20:54 UTC on August 18, 2026. 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 → |
Reports of a magnitude 2.6 earthquake 150 km E of Atka, Alaska came in on August 18, 2026 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 → |
A magnitude 2.1 earthquake was recorded 48 km SSE of Nelchina, Alaska on August 18, 2026 at 20:37 UTC. 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 → |
Seismographs logged a magnitude 2.1 earthquake 43 km SE of Perryville, Alaska with origin time 20:33 UTC on August 18, 2026. 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 → |
Reports of a magnitude 4.3 earthquake 5 km S of Ruteng, Indonesia came in on August 18, 2026 at 20:31 UTC. 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 → |
On August 18, 2026 at 20:25 UTC, a magnitude 2.4 earthquake struck 10 km NE of Niland, CA. 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 → |
This magnitude 4.4 event was detected 43 km N of Ruteng, Indonesia on August 18, 2026, with origin time 20:19 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-18 2026-08-18 20:16:10 UTC | 2.1ml | 79 km SW of Adak, Alaska 51.323°, -177.366° | 45.9 km | - | - | - | ✓ Reviewed | USGS → |
On August 18, 2026, worldwide seismic activity registered a magnitude 2.1 earthquake 79 km SW of Adak, Alaska at 20:16 UTC. 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 August 18, 2026. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.