Earthquakes on August 20, 2026
249
EARTHQUAKES on August 20, 2026
24-hour UTC period · USGS data
LARGEST: M6.7 — 37 km NE of Tambo, Peru
99 km deep · 75 people felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
14
M4.0–4.9
33
M3.0–3.9
17
M2.0–2.9
56
M1.0–1.9
129
Activity Summary
249
Total earthquakes
~250
Daily average
Normal
Activity level
14
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
6.7
37 km NE of Tambo, Peru
18:00 UTC · 99.0 km deep
Felt by 75
5.6
68 km NNW of Ende, Indonesia
18:12 UTC · 10.0 km deep
5.6
42 km N of Ruteng, Indonesia
02:46 UTC · 10.0 km deep
Felt by 1
5.3
48 km NNE of Ruteng, Indonesia
09:30 UTC · 10.0 km deep
Felt by 1
5.2
270 km SSE of Dunhuang, China
09:49 UTC · 10.0 km deep
05.1
180 km SE of Kokopo, Papua New Guinea
18:25 UTC · 35.0 km deep
5.0
Pacific-Antarctic Ridge
23:36 UTC · 10.0 km deep
5.0
81 km NNW of Ende, Indonesia
19:53 UTC · 10.0 km deep
Earthquake Map — August 20, 2026
All Earthquakes — August 20, 2026
Showing 30 of 120 (filtered from 249)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2026-08-20 2026-08-20 23:39:27 UTC | 3.2ml | 229 km ESE of Attu Station, Alaska 52.203°, 176.394° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.2 earthquake 229 km ESE of Attu Station, Alaska with origin time 23:39 UTC on August 20, 2026. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 23:36:41 UTC | 5.0mb | Pacific-Antarctic Ridge -56.592°, -141.454° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 5.0 event was detected near Pacific-Antarctic Ridge on August 20, 2026, with origin time 23:36 UTC. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 23:01:39 UTC | 2.3ml | 83 km SE of Unalaska, Alaska 53.384°, -165.582° | 16.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.3 earthquake 83 km SE of Unalaska, Alaska with origin time 23:01 UTC on August 20, 2026. Coming 20 hours after a magnitude 2.5 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. | ||||||||
2026-08-20 2026-08-20 23:01:37 UTC | 4.4mb | 51 km NNE of Labuan Bajo, Indonesia -8.047°, 120.008° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded 51 km NNE of Labuan Bajo, Indonesia on August 20, 2026 at 23:01 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 22:52:50 UTC | 2.2ml | 84 km SE of Unalaska, Alaska 53.368°, -165.579° | 16.6 km | - | - | - | ✓ Reviewed | USGS → |
August 20, 2026 brought a magnitude 2.2 earthquake 84 km SE of Unalaska, Alaska, logged at 22:52 UTC. It arrived roughly 20 hours after a larger magnitude 2.5 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 22:49:31 UTC | 2.0ml | 3 km SSW of Pāhala, Hawaii 19.177°, -155.494° | 33.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 20, 2026, worldwide seismic activity registered a magnitude 2.0 earthquake 3 km SSW of Pāhala, Hawaii at 22:49 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 22:39:32 UTC | 2.2ml | 74 km ESE of Adak, Alaska 51.703°, -175.588° | 58.8 km | - | - | - | ✓ Reviewed | USGS → |
On August 20, 2026 at 22:39 UTC, a magnitude 2.2 earthquake struck 74 km ESE of Adak, Alaska. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 22:22:17 UTC | 2.2ml | 80 km SSE of Adak, Alaska 51.171°, -176.362° | 17.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 80 km SSE of Adak, Alaska on August 20, 2026 at 22:22 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 22:17:39 UTC | 2.4ml | 24 km W of Cohoe, Alaska 60.403°, -151.746° | 77.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.4 seismic event took place 24 km W of Cohoe, Alaska on August 20, 2026 at 22:17 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 22:06:51 UTC | 3.0ml | 233 km ESE of Attu Station, Alaska 52.020°, 176.337° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.0 earthquake 233 km ESE of Attu Station, Alaska came in on August 20, 2026 at 22:06 UTC. It arrived roughly 11 hours after a larger magnitude 3.7 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 22:05:24 UTC | 2.8ml | 94 km S of False Pass, Alaska 54.009°, -163.584° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.8 earthquake 94 km S of False Pass, Alaska came in on August 20, 2026 at 22:05 UTC. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 22:05:06 UTC | 2.6ml | 87 km SSW of False Pass, Alaska 54.110°, -163.832° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.6 event was detected 87 km SSW of False Pass, Alaska on August 20, 2026, with origin time 22:05 UTC. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 21:57:40 UTC | 4.5mb | 85 km N of Saipan, Northern Mariana Islands 15.974°, 145.618° | 213.5 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.5 event was detected 85 km N of Saipan, Northern Mariana Islands on August 20, 2026, with origin time 21:57 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 21:50:18 UTC | 3.1ml | 233 km ESE of Attu Station, Alaska 52.011°, 176.334° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 20, 2026, worldwide seismic activity registered a magnitude 3.1 earthquake 233 km ESE of Attu Station, Alaska at 21:50 UTC. Coming 11 hours after a magnitude 3.7 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 21:42:13 UTC | 3.0ml | 235 km ESE of Attu Station, Alaska 51.931°, 176.312° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.0 seismic event took place 235 km ESE of Attu Station, Alaska on August 20, 2026 at 21:42 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.7 earthquake that occurred about 11 hours earlier. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 21:38:33 UTC | 2.0ml | 57 km SW of Unalaska, Alaska 53.454°, -167.038° | 14.2 km | - | - | - | ✓ Reviewed | USGS → |
At 21:38 UTC on August 20, 2026, a magnitude 2.0 tremor occurred 57 km SW of Unalaska, Alaska. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 21:30:31 UTC | 4.4mb | 17 km SSW of Tambo, Peru -14.953°, -73.974° | 86.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.4 earthquake 17 km SSW of Tambo, Peru with origin time 21:30 UTC on August 20, 2026. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 20:52:26 UTC | 4.7mb | 98 km NNE of Ruteng, Indonesia -7.773°, 120.754° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.7 event was detected 98 km NNE of Ruteng, Indonesia on August 20, 2026, with origin time 20:52 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 20:42:33 UTC | 2.0ml | 72 km SSE of Adak, Alaska 51.236°, -176.426° | 22.3 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.0 earthquake 72 km SSE of Adak, Alaska at 20:42 UTC on August 20, 2026. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 20:38:37 UTC | 4.0mb | 23 km ESE of Santa Gertrudis Miramar, Mexico 15.957°, -95.209° | 42.6 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.0 earthquake 23 km ESE of Santa Gertrudis Miramar, Mexico at 20:38 UTC on August 20, 2026. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 20:35:00 UTC | 4.4mb | 97 km W of San Antonio de los Cobres, Argentina -24.308°, -67.275° | 199.9 km | - | - | - | ✓ Reviewed | USGS → |
On August 20, 2026, worldwide seismic activity registered a magnitude 4.4 earthquake 97 km W of San Antonio de los Cobres, Argentina at 20:35 UTC. It arrived roughly 17 hours after a larger magnitude 4.7 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 20:23:33 UTC | 3.4ml | 235 km ESE of Attu Station, Alaska 51.903°, 176.287° | 6.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.4 earthquake was recorded 235 km ESE of Attu Station, Alaska on August 20, 2026 at 20:23 UTC. It arrived roughly 9 hours after a larger magnitude 3.7 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 19:53:51 UTC | 5.0mb | 81 km NNW of Ende, Indonesia -8.173°, 121.365° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 5.0 earthquake 81 km NNW of Ende, Indonesia came in on August 20, 2026 at 19:53 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.6 earthquake that occurred about 2 hours earlier. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 19:37:47 UTC | 2.3ml | 10 km W of Point Possession, Alaska 60.937°, -150.878° | 1.9 km | 1 | - | - | ✓ Reviewed | USGS → |
On August 20, 2026, worldwide seismic activity registered a magnitude 2.3 earthquake 10 km W of Point Possession, Alaska at 19:37 UTC. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 19:33:11 UTC | 2.0ml | 11 km ENE of Falls City, Texas 29.016°, -97.907° | 8.6 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 11 km ENE of Falls City, Texas on August 20, 2026, with origin time 19:33 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 19:27:01 UTC | 2.1ml | 111 km N of Yakutat, Alaska 60.540°, -140.027° | 4.5 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.1 earthquake 111 km N of Yakutat, Alaska came in on August 20, 2026 at 19:27 UTC. Coming 11 hours after a magnitude 2.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. 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. | ||||||||
2026-08-20 2026-08-20 19:24:02 UTC | 5.0mb | 69 km NW of Ende, Indonesia -8.402°, 121.211° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 5.0 seismic event took place 69 km NW of Ende, Indonesia on August 20, 2026 at 19:24 UTC. The event was offshore. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 19:15:34 UTC | 4.5mb | 83 km NE of Ruteng, Indonesia -7.998°, 120.902° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.5 earthquake 83 km NE of Ruteng, Indonesia came in on August 20, 2026 at 19:15 UTC. It arrived roughly 9 hours after a larger magnitude 4.6 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 19:07:03 UTC | 3.0ml | 236 km ESE of Attu Station, Alaska 52.014°, 176.393° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
August 20, 2026 brought a magnitude 3.0 earthquake 236 km ESE of Attu Station, Alaska, logged at 19:07 UTC. Coming 8 hours after a magnitude 3.7 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-20 2026-08-20 18:36:45 UTC | 2.1ml | 13 km ESE of Kaktovik, Alaska 70.073°, -143.317° | 5.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 13 km ESE of Kaktovik, Alaska on August 20, 2026 at 18:36 UTC. 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 20, 2026. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.