Earthquakes on August 17, 2023
247
EARTHQUAKES on August 17, 2023
24-hour UTC period · USGS data
10 km deep · 332 people felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
5
M4.0–4.9
24
M3.0–3.9
7
M2.0–2.9
48
M1.0–1.9
163
Activity Summary
247
Total earthquakes
~250
Daily average
Normal
Activity level
5
M5.0+ events
Significant Earthquakes (M4.5+)
6.1
10 km E of El Calvario, Colombia
17:04 UTC · 10.0 km deep
Felt by 332
6.0
central Mid-Atlantic Ridge
16:41 UTC · 10.0 km deep
5.6
3 km E of Restrepo, Colombia
17:17 UTC · 10.0 km deep
Felt by 56
5.4
124 km WSW of Pelabuhanratu, Indonesia
04:28 UTC · 54.8 km deep
Felt by 12
5.1
268 km SSW of ‘Ohonua, Tonga
16:31 UTC · 19.8 km deep
4.9
11 km NW of Villavicencio, Colombia
17:40 UTC · 10.0 km deep
Felt by 4
4.7
70 km NE of Savannah Bight, Honduras
21:11 UTC · 10.0 km deep
4.7
92 km WSW of Puerto Madero, Mexico
11:12 UTC · 47.1 km deep
Felt by 1
Earthquake Map — August 17, 2023
All Earthquakes — August 17, 2023
Showing 30 of 84 (filtered from 247)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-08-17 2023-08-17 23:59:52 UTC | 2.1ml | 206 km WSW of Adak, Alaska 51.343°, -179.498° | 25.6 km | - | - | - | ✓ Reviewed | USGS → |
August 17, 2023 brought a magnitude 2.1 earthquake 206 km WSW of Adak, Alaska, logged at 23:59 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 23:59:52 UTC | 2.1ml | 208 km WSW of Adak, Alaska 51.328°, -179.507° | 25.6 km | - | - | - | ✓ Reviewed | USGS → |
On August 17, 2023 at 23:59 UTC, a magnitude 2.1 earthquake struck 208 km WSW of Adak, Alaska. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 23:45:44 UTC | 4.3mb | 214 km WSW of Hihifo, Tonga -16.488°, -175.722° | 368.8 km | - | - | - | ✓ Reviewed | USGS → |
August 17, 2023 brought a magnitude 4.3 earthquake 214 km WSW of Hihifo, Tonga, logged at 23:45 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. | ||||||||
2023-08-17 2023-08-17 23:09:30 UTC | 2.0md | 4 km E of Petrolia, CA 40.323°, -124.243° | 29.6 km | - | - | - | ✓ Reviewed | USGS → |
August 17, 2023 brought a magnitude 2.0 earthquake 4 km E of Petrolia, CA, logged at 23:09 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.1 earthquake that occurred about 2 hours earlier. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 23:00:25 UTC | 2.8ml | Rat Islands, Aleutian Islands, Alaska 51.900°, 178.364° | 129.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.8 seismic event took place near Rat Islands, Aleutian Islands, Alaska on August 17, 2023 at 23:00 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 22:47:51 UTC | 4.2mb | Fiji region -19.576°, -178.282° | 596.5 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.2 event was detected in the Fiji region on August 17, 2023, with origin time 22:47 UTC. This is the deepest earthquake in the current dataset — a deep-focus event. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 22:26:56 UTC | 2.0ml | 95 km SSW of Nikolski, Alaska 52.131°, -169.350° | 20.3 km | - | - | - | ✓ Reviewed | USGS → |
On August 17, 2023 at 22:26 UTC, a magnitude 2.0 earthquake struck 95 km SSW of Nikolski, Alaska. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 21:42:46 UTC | 4.3mb | 75 km ESE of Bintuni, Indonesia -2.412°, 134.131° | 42.1 km | - | - | - | ✓ Reviewed | USGS → |
On August 17, 2023 at 21:42 UTC, a magnitude 4.3 earthquake struck 75 km ESE of Bintuni, Indonesia. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 21:39:23 UTC | 2.0md | 3 km E of Petrolia, CA 40.323°, -124.249° | 29.6 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.0 earthquake 3 km E of Petrolia, CA came in on August 17, 2023 at 21:39 UTC. Coming 1 hours after a magnitude 4.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 21:20:03 UTC | 4.3mb | 174 km NNW of Sabang, Indonesia 7.356°, 94.735° | 96.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 earthquake was recorded 174 km NNW of Sabang, Indonesia on August 17, 2023 at 21:20 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 21:14:19 UTC | 2.5ml | Rat Islands, Aleutian Islands, Alaska 51.005°, 179.177° | 27.4 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.5 event was detected near Rat Islands, Aleutian Islands, Alaska on August 17, 2023, with origin time 21:14 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 21:11:31 UTC | 4.7mb | 70 km NE of Savannah Bight, Honduras 16.973°, -85.468° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.7 event was detected 70 km NE of Savannah Bight, Honduras on August 17, 2023, with origin time 21:11 UTC. The event was offshore. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 21:08:00 UTC | 4.1mw | 4 km E of Petrolia, CA 40.318°, -124.234° | 31.9 km | 98 | II | green | ✓ Reviewed | USGS → |
A magnitude 4.1 seismic event took place 4 km E of Petrolia, CA on August 17, 2023 at 21:08 UTC. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 20:53:14 UTC | 3.3md | 87 km N of Arecibo, Puerto Rico 19.256°, -66.606° | 18.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.3 earthquake was recorded 87 km N of Arecibo, Puerto Rico on August 17, 2023 at 20:53 UTC. The event was offshore. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 20:25:15 UTC | 3.0ml | 36 km SSW of Eureka, Nevada 39.204°, -116.113° | 15.8 km | 1 | - | - | ✓ Reviewed | USGS → |
On August 17, 2023, worldwide seismic activity registered a magnitude 3.0 earthquake 36 km SSW of Eureka, Nevada at 20:25 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 19:59:13 UTC | 2.2ml | 88 km NNW of Karluk, Alaska 58.278°, -155.114° | 1.5 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.2 earthquake 88 km NNW of Karluk, Alaska with origin time 19:59 UTC on August 17, 2023. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 19:58:59 UTC | 3.4ml | 11 km WSW of Grapevine, CA 34.899°, -119.039° | 8.9 km | 56 | - | - | ✓ Reviewed | USGS → |
On August 17, 2023 at 19:58 UTC, a magnitude 3.4 earthquake struck 11 km WSW of Grapevine, CA. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 19:24:56 UTC | 2.0ml | Alaska Peninsula 58.299°, -154.954° | 3.2 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded near Alaska Peninsula on August 17, 2023 at 19:24 UTC. 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. | ||||||||
2023-08-17 2023-08-17 18:55:42 UTC | 2.4ml | 10 km S of Willow, Alaska 61.655°, -150.007° | 12.1 km | - | - | - | ✓ Reviewed | USGS → |
On August 17, 2023 at 18:55 UTC, a magnitude 2.4 earthquake struck 10 km S of Willow, Alaska. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 18:16:44 UTC | 4.4mb | northern Colombia 6.684°, -73.032° | 162.8 km | - | - | - | ✓ Reviewed | USGS → |
On August 17, 2023, worldwide seismic activity registered a magnitude 4.4 earthquake near northern Colombia at 18:16 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 18:15:52 UTC | 2.3ml | 38 km NNW of Valdez, Alaska 61.421°, -146.730° | 10.3 km | - | - | - | ✓ Reviewed | USGS → |
On August 17, 2023, worldwide seismic activity registered a magnitude 2.3 earthquake 38 km NNW of Valdez, Alaska at 18:15 UTC. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 18:06:29 UTC | 2.0ml | Alaska Peninsula 54.661°, -161.107° | 14.8 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake near Alaska Peninsula with origin time 18:06 UTC on August 17, 2023. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 17:40:16 UTC | 4.9mb | 11 km NW of Villavicencio, Colombia 4.229°, -73.685° | 10.0 km | 4 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.9 earthquake 11 km NW of Villavicencio, Colombia at 17:40 UTC on August 17, 2023. Coming 1 hours after a magnitude 6.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 17:37:34 UTC | 2.3ml | 0 km SE of Nordheim, Texas 28.945°, -97.635° | 3.6 km | - | - | - | ✓ Reviewed | USGS → |
At 17:37 UTC on August 17, 2023, a magnitude 2.3 tremor occurred 0 km SE of Nordheim, Texas. 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. | ||||||||
2023-08-17 2023-08-17 17:25:44 UTC | 2.3md | 4 km E of Lawrenceville, Illinois 38.724°, -87.630° | 4.2 km | 26 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.3 earthquake 4 km E of Lawrenceville, Illinois with origin time 17:25 UTC on August 17, 2023. 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. | ||||||||
2023-08-17 2023-08-17 17:21:47 UTC | 2.1ml | Southern Alaska 61.428°, -151.516° | 69.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded near Southern Alaska on August 17, 2023 at 17:21 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 17:20:31 UTC | 3.0ml | Colorado 37.199°, -104.762° | 5.0 km | 4 | III | - | ✓ Reviewed | USGS → |
At 17:20 UTC on August 17, 2023, a magnitude 3.0 tremor occurred near Colorado. This event falls inside the aftershock decay of a nearby magnitude 3.2 earthquake that occurred about 1 hours earlier. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 17:17:17 UTC | 5.6mww | 3 km E of Restrepo, Colombia 4.258°, -73.529° | 10.0 km | 56 | VII | orange | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 5.6 earthquake 3 km E of Restrepo, Colombia with origin time 17:17 UTC on August 17, 2023. The USGS PAGER system assigned a orange alert level for this event, signalling regional impact possible. Coming 1 hours after a magnitude 6.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M5.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 17:04:48 UTC | 6.1mww | 10 km E of El Calvario, Colombia 4.346°, -73.620° | 10.0 km | 332 | VII | yellow | ✓ Reviewed | USGS → |
On August 17, 2023 at 17:04 UTC, a magnitude 6.1 earthquake struck 10 km E of El Calvario, Colombia. The USGS PAGER system assigned a yellow alert level for this event, signalling local impact possible. It is the largest earthquake currently listed for worldwide seismic activity on August 17, 2023. See the M6.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-17 2023-08-17 16:58:19 UTC | 2.3ml | 22 km WNW of Stanley, Idaho 44.325°, -115.171° | 8.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 seismic event took place 22 km WNW of Stanley, Idaho on August 17, 2023 at 16:58 UTC. See the M2.3 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, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.