Earthquakes on August 17, 2020
377
EARTHQUAKES on August 17, 2020
24-hour UTC period · USGS data
10 km deep
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
7
M4.0–4.9
31
M3.0–3.9
20
M2.0–2.9
86
M1.0–1.9
233
Activity Summary
377
Total earthquakes
~250
Daily average
Elevated
Activity level
7
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.4
236 km NE of Samarai, Papua New Guinea
12:54 UTC · 10.0 km deep
5.4
southern Mid-Atlantic Ridge
11:45 UTC · 10.0 km deep
5.2
northern Mid-Atlantic Ridge
09:52 UTC · 10.0 km deep
5.1
88km ESE of Maneadero, B.C., MX
15:30 UTC · 16.2 km deep
Felt by 744
5.1
245 km E of Levuka, Fiji
09:52 UTC · 583.5 km deep
5.0
south of Africa
18:30 UTC · 10.0 km deep
5.0
56 km SSE of Ýdra, Greece
07:27 UTC · 95.3 km deep
Felt by 6
4.8
120 km SSW of Santa María Chico Ometepec, Mexico
20:14 UTC · 10.0 km deep
Felt by 2
Earthquake Map — August 17, 2020
All Earthquakes — August 17, 2020
Showing 30 of 144 (filtered from 377)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2020-08-17 2020-08-17 23:35:48 UTC | 2.9ml | 135 km ESE of Atka, Alaska 51.636°, -172.454° | 140.3 km | - | - | - | ✓ Reviewed | USGS → |
On August 17, 2020 at 23:35 UTC, a magnitude 2.9 earthquake struck 135 km ESE of Atka, Alaska. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 23:24:16 UTC | 3.6mb | 68 km SE of Unalaska, Alaska 53.459°, -165.771° | 38.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 17, 2020, worldwide seismic activity registered a magnitude 3.6 earthquake 68 km SE of Unalaska, Alaska at 23:24 UTC. The event was offshore. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 23:15:11 UTC | 2.0ml | 53 km WNW of Valdez, Alaska 61.331°, -147.257° | 5.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 53 km WNW of Valdez, Alaska on August 17, 2020 at 23:15 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 23:10:03 UTC | 2.2ml | 76 km SSW of Unalaska, Alaska 53.199°, -166.777° | 27.6 km | - | - | - | ✓ Reviewed | USGS → |
On August 17, 2020, worldwide seismic activity registered a magnitude 2.2 earthquake 76 km SSW of Unalaska, Alaska at 23:10 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 23:06:56 UTC | 4.4mb | Izu Islands, Japan region 30.703°, 141.965° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 earthquake was recorded in the Izu Islands, Japan region on August 17, 2020 at 23:06 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 23:05:36 UTC | 4.6mb | southeast Indian Ridge -48.353°, 110.112° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 17, 2020, worldwide seismic activity registered a magnitude 4.6 earthquake near southeast Indian Ridge at 23:05 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 23:01:19 UTC | 2.1ml | 4 km ENE of P?hala, Hawaii 19.212°, -155.436° | 33.2 km | - | - | - | Auto | USGS → |
On August 17, 2020, worldwide seismic activity registered a magnitude 2.1 earthquake 4 km ENE of P?hala, Hawaii at 23:01 UTC. It arrived roughly 7 hours after a larger magnitude 2.6 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 22:56:32 UTC | 4.6mb | southeast Indian Ridge -48.391°, 109.732° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 22:56 UTC on August 17, 2020, a magnitude 4.6 tremor occurred near southeast Indian Ridge. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 22:33:56 UTC | 2.1ml | 145 km WSW of Adak, Alaska 51.508°, -178.651° | 64.3 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.1 earthquake 145 km WSW of Adak, Alaska came in on August 17, 2020 at 22:33 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 22:06:16 UTC | 2.4ml | 50 km E of San Vicente, Mexico 31.406°, -115.728° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.4 earthquake 50 km E of San Vicente, Mexico with origin time 22:06 UTC on August 17, 2020. Coming 7 hours after a magnitude 5.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 21:59:47 UTC | 4.3mb | 43 km WSW of Acajutla, El Salvador 13.378°, -90.168° | 64.7 km | 1 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.3 earthquake 43 km WSW of Acajutla, El Salvador came in on August 17, 2020 at 21:59 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 21:59:00 UTC | 3.1ml | 4 km SE of Big Lake, Alaska 61.495°, -149.880° | 46.1 km | 18 | II | - | ✓ Reviewed | USGS → |
A magnitude 3.1 earthquake was recorded 4 km SE of Big Lake, Alaska on August 17, 2020 at 21:59 UTC. The event was offshore. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 21:54:58 UTC | 4.1mb | Izu Islands, Japan region 30.549°, 138.787° | 422.7 km | - | - | - | ✓ Reviewed | USGS → |
On August 17, 2020, worldwide seismic activity registered a magnitude 4.1 earthquake in the Izu Islands, Japan region at 21:54 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 21:32:14 UTC | 4.0mb | 72 km ENE of Katabu, Indonesia -4.642°, 123.099° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.0 earthquake 72 km ENE of Katabu, Indonesia came in on August 17, 2020 at 21:32 UTC. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 21:10:45 UTC | 2.7ml | 53 km E of San Vicente, Mexico 31.370°, -115.683° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
August 17, 2020 brought a magnitude 2.7 earthquake 53 km E of San Vicente, Mexico, logged at 21:10 UTC. It arrived roughly 6 hours after a larger magnitude 5.1 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 20:51:25 UTC | 4.1mb | 133 km NNE of Isangel, Vanuatu -18.463°, 169.858° | 208.8 km | - | - | - | ✓ Reviewed | USGS → |
At 20:51 UTC on August 17, 2020, a magnitude 4.1 tremor occurred 133 km NNE of Isangel, Vanuatu. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 20:45:28 UTC | 2.5ml | 86km ESE of Maneadero, B.C., MX 31.503°, -115.698° | 8.4 km | - | - | - | ✓ Reviewed | USGS → |
At 20:45 UTC on August 17, 2020, a magnitude 2.5 tremor occurred 86km ESE of Maneadero, B.C., MX. It arrived roughly 5 hours after a larger magnitude 5.1 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 20:43:36 UTC | 2.6md | 8km WSW of Saratoga, CA 37.231°, -122.106° | 13.8 km | 47 | - | - | ✓ Reviewed | USGS → |
On August 17, 2020, worldwide seismic activity registered a magnitude 2.6 earthquake 8km WSW of Saratoga, CA at 20:43 UTC. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 20:35:17 UTC | 2.1md | 10km NE of Milpitas, CA 37.492°, -121.825° | 4.8 km | 2 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 10km NE of Milpitas, CA on August 17, 2020, with origin time 20:35 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.5 earthquake that occurred about 1 hours earlier. 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. | ||||||||
2020-08-17 2020-08-17 20:29:06 UTC | 2.9md | 10km NE of Milpitas, CA 37.492°, -121.829° | 4.6 km | 77 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 earthquake was recorded 10km NE of Milpitas, CA on August 17, 2020 at 20:29 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.5 earthquake that occurred about 1 hours earlier. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 20:27:49 UTC | 3.5mw | 10km NE of Milpitas, CA 37.491°, -121.829° | 4.9 km | 781 | IV | - | ✓ Reviewed | USGS → |
This magnitude 3.5 event was detected 10km NE of Milpitas, CA on August 17, 2020, with origin time 20:27 UTC. In the 72 hours after this event, the USGS recorded 8 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 20:14:59 UTC | 4.8mb | 120 km SSW of Santa María Chico Ometepec, Mexico 15.150°, -98.358° | 10.0 km | 2 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.8 earthquake 120 km SSW of Santa María Chico Ometepec, Mexico came in on August 17, 2020 at 20:14 UTC. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 20:10:00 UTC | 2.3md | 5 km SW of Guánica, Puerto Rico 17.937°, -66.949° | 8.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.3 event was detected 5 km SW of Guánica, Puerto Rico on August 17, 2020, with origin time 20:10 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.2 earthquake that occurred about 12 hours earlier. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 19:47:02 UTC | 2.3ml | 88km ESE of Maneadero, B.C., MX 31.515°, -115.671° | 9.2 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.3 earthquake 88km ESE of Maneadero, B.C., MX came in on August 17, 2020 at 19:47 UTC. Coming 4 hours after a magnitude 5.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 19:39:44 UTC | 2.5ml | 56 km ENE of San Vicente, Mexico 31.484°, -115.686° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.5 earthquake 56 km ENE of San Vicente, Mexico came in on August 17, 2020 at 19:39 UTC. It arrived roughly 4 hours after a larger magnitude 5.1 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 19:32:40 UTC | 4.8mb | 55 km S of Intipucá, El Salvador 12.699°, -88.066° | 76.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.8 seismic event took place 55 km S of Intipucá, El Salvador on August 17, 2020 at 19:32 UTC. The event was offshore. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 19:25:12 UTC | 2.2ml | 97 km SSE of Perryville, Alaska 55.157°, -158.350° | 25.1 km | - | - | - | ✓ Reviewed | USGS → |
At 19:25 UTC on August 17, 2020, a magnitude 2.2 tremor occurred 97 km SSE of Perryville, Alaska. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 19:13:54 UTC | 2.4ml | 77 km SSW of Sand Point, Alaska 54.673°, -160.861° | 25.6 km | - | - | - | ✓ Reviewed | USGS → |
On August 17, 2020, worldwide seismic activity registered a magnitude 2.4 earthquake 77 km SSW of Sand Point, Alaska at 19:13 UTC. It arrived roughly 15 hours after a larger magnitude 3.1 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 19:07:30 UTC | 2.7ml | 86 km SSE of False Pass, Alaska 54.203°, -162.688° | 5.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 17, 2020 at 19:07 UTC, a magnitude 2.7 earthquake struck 86 km SSE of False Pass, Alaska. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2020-08-17 2020-08-17 18:59:33 UTC | 2.4ml | 84km SSW of Alberto Oviedo Mota, B.C., MX 31.572°, -115.621° | 9.6 km | - | - | - | ✓ Reviewed | USGS → |
On August 17, 2020 at 18:59 UTC, a magnitude 2.4 earthquake struck 84km SSW of Alberto Oviedo Mota, B.C., MX. It arrived roughly 3 hours after a larger magnitude 5.1 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.4 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 17, 2020. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.