Earthquakes on August 23, 2020
281
EARTHQUAKES on August 23, 2020
24-hour UTC period · USGS data
47 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
2
M4.0–4.9
35
M3.0–3.9
15
M2.0–2.9
50
M1.0–1.9
179
Activity Summary
281
Total earthquakes
~250
Daily average
Normal
Activity level
2
M5.0+ events
Significant Earthquakes (M4.5+)
5.4
67 km SE of Kokopo, Papua New Guinea
16:46 UTC · 47.4 km deep
5.2
248 km SSW of Sidareja, Indonesia
17:38 UTC · 10.0 km deep
4.9
57 km NW of Port-Vila, Vanuatu
21:16 UTC · 10.0 km deep
Felt by 3
4.9
113 km SSW of Nikolski, Alaska
01:48 UTC · 18.1 km deep
4.8
259 km SSW of Sidareja, Indonesia
17:54 UTC · 10.0 km deep
4.8
115 km NW of Sola, Vanuatu
13:03 UTC · 138.3 km deep
4.8
194 km WNW of Panguna, Papua New Guinea
08:12 UTC · 10.0 km deep
4.7
Scotia Sea
13:00 UTC · 10.0 km deep
Earthquake Map — August 23, 2020
All Earthquakes — August 23, 2020
Showing 30 of 102 (filtered from 281)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2020-08-23 2020-08-23 23:15:02 UTC | 2.7ml | 107 km SSE of Nikolski, Alaska 52.036°, -168.282° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
August 23, 2020 brought a magnitude 2.7 earthquake 107 km SSE of Nikolski, Alaska, logged at 23:15 UTC. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 23:05:42 UTC | 2.3ml | 21 km NE of Dawson City, Canada 64.206°, -139.147° | 11.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 seismic event took place 21 km NE of Dawson City, Canada on August 23, 2020 at 23:05 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 23:05:38 UTC | 3.3ml | 56 km ENE of San Vicente, Mexico 31.442°, -115.669° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:05 UTC on August 23, 2020, a magnitude 3.3 tremor occurred 56 km ENE of San Vicente, Mexico. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 22:52:39 UTC | 4.1mb | 13 km NNW of Ponorogo, Indonesia -7.758°, 111.420° | 142.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.1 earthquake was recorded 13 km NNW of Ponorogo, Indonesia on August 23, 2020 at 22:52 UTC. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 22:46:11 UTC | 2.2ml | 155 km S of False Pass, Alaska 53.459°, -163.626° | 23.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.2 earthquake 155 km S of False Pass, Alaska at 22:46 UTC on August 23, 2020. This event falls inside the aftershock decay of a nearby magnitude 4.5 earthquake that occurred about 1 hours earlier. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 22:40:41 UTC | 4.5mwr | 151 km S of False Pass, Alaska 53.501°, -163.718° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 23, 2020, worldwide seismic activity registered a magnitude 4.5 earthquake 151 km S of False Pass, Alaska at 22:40 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 22:15:08 UTC | 2.2ml | 14 km ENE of Atka, Alaska 52.239°, -174.008° | 100.7 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.2 event was detected 14 km ENE of Atka, Alaska on August 23, 2020, with origin time 22:15 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 22:02:10 UTC | 3.4ml | 59 km SSW of Adak, Alaska 51.354°, -176.809° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.4 earthquake was recorded 59 km SSW of Adak, Alaska on August 23, 2020 at 22:02 UTC. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 21:31:44 UTC | 4.6mb | 86 km ESE of Hihifo, Tonga -16.171°, -173.015° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 23, 2020 at 21:31 UTC, a magnitude 4.6 earthquake struck 86 km ESE of Hihifo, Tonga. This event falls inside the aftershock decay of a nearby magnitude 4.7 earthquake that occurred about 21 hours earlier. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 21:24:46 UTC | 3.3ml | 53 km ENE of San Vicente, Mexico 31.451°, -115.709° | 15.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.3 earthquake 53 km ENE of San Vicente, Mexico at 21:24 UTC on August 23, 2020. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 21:16:29 UTC | 4.9mb | 57 km NW of Port-Vila, Vanuatu -17.397°, 167.903° | 10.0 km | 3 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.9 earthquake 57 km NW of Port-Vila, Vanuatu with origin time 21:16 UTC on August 23, 2020. The event was offshore. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 21:09:08 UTC | 2.6md | 45km W of Petrolia, CA 40.364°, -124.811° | 22.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.6 earthquake was recorded 45km W of Petrolia, CA on August 23, 2020 at 21:09 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 21:05:36 UTC | 4.1mb | 67 km S of Banjar, Indonesia -7.797°, 107.337° | 58.8 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.1 earthquake 67 km S of Banjar, Indonesia with origin time 21:05 UTC on August 23, 2020. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 21:05:19 UTC | 3.0ml | 114 km SSW of Nikolski, Alaska 51.964°, -169.389° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 23, 2020 at 21:05 UTC, a magnitude 3.0 earthquake struck 114 km SSW of Nikolski, Alaska. Coming 19 hours after a magnitude 4.9 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. | ||||||||
2020-08-23 2020-08-23 20:50:32 UTC | 3.0md | 1 km ESE of P?hala, Hawaii 19.200°, -155.469° | 34.8 km | 9 | III | - | ✓ Reviewed | USGS → |
A magnitude 3.0 earthquake was recorded 1 km ESE of P?hala, Hawaii on August 23, 2020 at 20:50 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 20:44:51 UTC | 2.6ml | 26 km WSW of Salcha, Alaska 64.396°, -147.374° | 2.8 km | - | - | - | ✓ Reviewed | USGS → |
At 20:44 UTC on August 23, 2020, a magnitude 2.6 tremor occurred 26 km WSW of Salcha, Alaska. This event falls inside the aftershock decay of a nearby magnitude 3.4 earthquake that occurred about 7 hours earlier. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 20:33:32 UTC | 4.3mb | Fiji region -18.158°, -177.828° | 587.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 23, 2020 at 20:33 UTC, a magnitude 4.3 earthquake struck in the Fiji region. This is the deepest earthquake in the current dataset — a deep-focus event. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 20:12:05 UTC | 2.5ml | 39 km SW of Karluk, Alaska 57.324°, -154.937° | 30.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 earthquake was recorded 39 km SW of Karluk, Alaska on August 23, 2020 at 20:12 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 19:20:06 UTC | 2.0ml | 18 km ESE of Adak, Alaska 51.830°, -176.382° | 79.6 km | - | - | - | ✓ Reviewed | USGS → |
August 23, 2020 brought a magnitude 2.0 earthquake 18 km ESE of Adak, Alaska, logged at 19:20 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 18:49:37 UTC | 2.6ml | 29 km SSE of Mina, Nevada 38.156°, -117.944° | 10.2 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.6 earthquake 29 km SSE of Mina, Nevada at 18:49 UTC on August 23, 2020. Coming 8 hours after a magnitude 3.2 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 18:47:46 UTC | 2.3ml | 5 km NW of Ames, Oklahoma 36.279°, -98.238° | 7.7 km | - | - | - | ✓ Reviewed | USGS → |
On August 23, 2020, worldwide seismic activity registered a magnitude 2.3 earthquake 5 km NW of Ames, Oklahoma at 18:47 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 18:03:37 UTC | 4.3mb | 109 km SSW of Maitum, Philippines 5.146°, 124.076° | 482.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 earthquake was recorded 109 km SSW of Maitum, Philippines on August 23, 2020 at 18:03 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. | ||||||||
2020-08-23 2020-08-23 17:59:01 UTC | 2.1ml | 28 km WSW of Salcha, Alaska 64.401°, -147.410° | 3.6 km | - | - | - | ✓ Reviewed | USGS → |
On August 23, 2020, worldwide seismic activity registered a magnitude 2.1 earthquake 28 km WSW of Salcha, Alaska at 17:59 UTC. It arrived roughly 4 hours after a larger magnitude 3.4 mainshock in the same 20 km area, placing it within the typical aftershock window. 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. | ||||||||
2020-08-23 2020-08-23 17:54:48 UTC | 4.8mb | 259 km SSW of Sidareja, Indonesia -9.763°, 108.222° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 17:54 UTC on August 23, 2020, a magnitude 4.8 tremor occurred 259 km SSW of Sidareja, Indonesia. This event falls inside the aftershock decay of a nearby magnitude 5.2 earthquake that occurred about 1 hours earlier. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 17:41:11 UTC | 2.6md | 4 km SE of Maria Antonia, Puerto Rico 17.944°, -66.864° | 15.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.6 earthquake 4 km SE of Maria Antonia, Puerto Rico with origin time 17:41 UTC on August 23, 2020. Coming 3 hours after a magnitude 2.9 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 17:38:01 UTC | 5.2mww | 248 km SSW of Sidareja, Indonesia -9.651°, 108.188° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 5.2 earthquake was recorded 248 km SSW of Sidareja, Indonesia on August 23, 2020 at 17:38 UTC. See the M5.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 17:31:52 UTC | 4.4mb | Fiji region -18.476°, -177.783° | 581.2 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.4 earthquake in the Fiji region came in on August 23, 2020 at 17:31 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. | ||||||||
2020-08-23 2020-08-23 17:07:43 UTC | 4.5mb | 183 km NW of Rikaze, China 30.393°, 87.504° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 17:07 UTC on August 23, 2020, a magnitude 4.5 tremor occurred 183 km NW of Rikaze, China. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 17:07:42 UTC | 2.8ml | 27 km WSW of Salcha, Alaska 64.406°, -147.394° | 6.3 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.8 earthquake 27 km WSW of Salcha, Alaska at 17:07 UTC on August 23, 2020. This event falls inside the aftershock decay of a nearby magnitude 3.4 earthquake that occurred about 3 hours earlier. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-23 2020-08-23 16:51:59 UTC | 2.1md | 30km SE of Bodie, CA 38.041°, -118.745° | 3.1 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 30km SE of Bodie, CA on August 23, 2020, with origin time 16:51 UTC. It arrived roughly 8 hours after a larger magnitude 2.3 mainshock in the same 20 km area, placing it within the typical aftershock window. 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. | ||||||||
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 23, 2020. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.