Earthquakes on August 29, 2023
244
EARTHQUAKES on August 29, 2023
24-hour UTC period · USGS data
203 km deep · 3 people felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
3
M4.0–4.9
30
M3.0–3.9
12
M2.0–2.9
54
M1.0–1.9
145
Activity Summary
244
Total earthquakes
~250
Daily average
Normal
Activity level
3
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.9
270 km SSE of Amahai, Indonesia
04:34 UTC · 203.0 km deep
Felt by 3
5.5
56 km NNE of Narganá, Panama
04:59 UTC · 33.9 km deep
Felt by 111
5.2
91 km W of Umatac Village, Guam
10:15 UTC · 144.5 km deep
Felt by 14
4.9
South Sandwich Islands region
12:50 UTC · 74.3 km deep
4.8
19 km SW of Kulu, Turkey
04:58 UTC · 7.8 km deep
Felt by 6
4.7
Kermadec Islands region
18:53 UTC · 10.0 km deep
4.7
24 km SW of Magdalena, Philippines
13:17 UTC · 10.0 km deep
4.6
13 km W of Dompu, Indonesia
22:38 UTC · 132.4 km deep
Earthquake Map — August 29, 2023
All Earthquakes — August 29, 2023
Showing 30 of 99 (filtered from 244)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-08-29 2023-08-29 23:49:59 UTC | 4.3mb | 64 km E of Hvolsv?llur, Iceland 63.727°, -18.925° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.3 earthquake 64 km E of Hvolsv?llur, Iceland came in on August 29, 2023 at 23:49 UTC. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 23:01:36 UTC | 2.5md | 4 km SSW of Guánica, Puerto Rico 17.936°, -66.932° | 16.8 km | - | - | - | ✓ Reviewed | USGS → |
On August 29, 2023, worldwide seismic activity registered a magnitude 2.5 earthquake 4 km SSW of Guánica, Puerto Rico at 23:01 UTC. It arrived roughly 6 hours after a larger magnitude 2.6 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. | ||||||||
2023-08-29 2023-08-29 22:57:28 UTC | 2.9ml | 92 km W of Akhiok, Alaska 56.935°, -155.690° | 61.9 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.9 earthquake 92 km W of Akhiok, Alaska at 22:57 UTC on August 29, 2023. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 22:55:09 UTC | 2.6md | 102 km W of Petrolia, CA 40.449°, -125.481° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.6 event was detected 102 km W of Petrolia, CA on August 29, 2023, with origin time 22:55 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 22:53:19 UTC | 2.2ml | 19 km NNW of Cantwell, Alaska 63.546°, -149.150° | 98.9 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.2 earthquake 19 km NNW of Cantwell, Alaska with origin time 22:53 UTC on August 29, 2023. It arrived roughly 22 hours after a larger magnitude 3.5 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 22:38:01 UTC | 4.6mb | 13 km W of Dompu, Indonesia -8.518°, 118.339° | 132.4 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.6 earthquake 13 km W of Dompu, Indonesia came in on August 29, 2023 at 22:38 UTC. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 21:46:49 UTC | 4.1mb | Norwegian Sea 72.430°, 2.825° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 21:46 UTC on August 29, 2023, a magnitude 4.1 tremor occurred near Norwegian Sea. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 21:31:30 UTC | 4.6mb | 20 km NE of Bahía de Caráquez, Ecuador -0.448°, -80.322° | 40.1 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 4.6 seismic event took place 20 km NE of Bahía de Caráquez, Ecuador on August 29, 2023 at 21:31 UTC. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 21:02:01 UTC | 2.1md | 4 km NNE of Fairview, CA 37.710°, -122.037° | 5.0 km | 21 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 4 km NNE of Fairview, CA on August 29, 2023, with origin time 21:02 UTC. 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. | ||||||||
2023-08-29 2023-08-29 20:53:17 UTC | 4.6mb | north of Ascension Island -1.110°, -15.861° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
August 29, 2023 brought a magnitude 4.6 earthquake north of Ascension Island, logged at 20:53 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 20:33:44 UTC | 2.6mb_lg | 7 km WSW of Formoso, Kansas 39.751°, -98.074° | 11.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.6 seismic event took place 7 km WSW of Formoso, Kansas on August 29, 2023 at 20:33 UTC. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 20:04:55 UTC | 4.0mb | 51 km SSW of Jimbaran, Indonesia -9.228°, 114.991° | 89.5 km | - | - | - | ✓ Reviewed | USGS → |
On August 29, 2023 at 20:04 UTC, a magnitude 4.0 earthquake struck 51 km SSW of Jimbaran, Indonesia. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 20:00:28 UTC | 4.3mb | 8 km ESE of Culaman, Philippines 5.923°, 125.722° | 185.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 seismic event took place 8 km ESE of Culaman, Philippines on August 29, 2023 at 20:00 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 19:48:33 UTC | 3.5ml | 77 km SE of Sand Point, Alaska 54.850°, -159.627° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.5 seismic event took place 77 km SE of Sand Point, Alaska on August 29, 2023 at 19:48 UTC. The event was offshore. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 19:46:14 UTC | 4.1mb | Kermadec Islands region -31.142°, 179.945° | 475.2 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.1 earthquake in the Kermadec Islands region at 19:46 UTC on August 29, 2023. 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. | ||||||||
2023-08-29 2023-08-29 18:58:16 UTC | 2.1ml | 244 km WSW of Adak, Alaska 51.397°, 179.922° | 11.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 244 km WSW of Adak, Alaska on August 29, 2023 at 18:58 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 18:53:55 UTC | 4.7mb | Kermadec Islands region -27.064°, -175.783° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.7 earthquake in the Kermadec Islands region at 18:53 UTC on August 29, 2023. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 18:20:04 UTC | 4.1mb | southeast of Australia -43.491°, 159.673° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.1 event was detected southeast of Australia on August 29, 2023, with origin time 18:20 UTC. Coming 1 hours after a magnitude 4.3 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 18:11:29 UTC | 4.3mb | southeast of Australia -43.368°, 159.718° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
August 29, 2023 brought a magnitude 4.3 earthquake southeast of Australia, logged at 18:11 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 18:11:18 UTC | 2.2ml | 96 km W of Pilot Point, Alaska 57.740°, -159.161° | 0.1 km | - | - | - | ✓ Reviewed | USGS → |
On August 29, 2023, worldwide seismic activity registered a magnitude 2.2 earthquake 96 km W of Pilot Point, Alaska at 18:11 UTC. 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. | ||||||||
2023-08-29 2023-08-29 17:41:10 UTC | 2.0ml | 66 km SE of Unalaska, Alaska 53.460°, -165.802° | 25.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 66 km SE of Unalaska, Alaska on August 29, 2023 at 17:41 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 17:36:33 UTC | 4.4mb | Bismarck Sea -4.725°, 149.546° | 589.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.4 earthquake near Bismarck Sea with origin time 17:36 UTC on August 29, 2023. 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. | ||||||||
2023-08-29 2023-08-29 17:35:52 UTC | 2.9ml | 208 km WSW of Point Hope, Alaska 67.510°, -171.186° | 14.9 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.9 event was detected 208 km WSW of Point Hope, Alaska on August 29, 2023, with origin time 17:35 UTC. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 17:32:23 UTC | 2.2ml | 39 km SW of Alamo, Nevada 37.146°, -115.522° | 11.6 km | - | - | - | ✓ Reviewed | USGS → |
At 17:32 UTC on August 29, 2023, a magnitude 2.2 tremor occurred 39 km SW of Alamo, Nevada. In the 72 hours after this event, the USGS recorded 5 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 17:11:49 UTC | 2.4ml | Central Alaska 63.273°, -150.439° | 116.9 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.4 earthquake near Central Alaska at 17:11 UTC on August 29, 2023. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 16:55:12 UTC | 2.6md | 6 km WSW of Guánica, Puerto Rico 17.942°, -66.962° | 6.6 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.6 earthquake 6 km WSW of Guánica, Puerto Rico came in on August 29, 2023 at 16:55 UTC. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 16:31:07 UTC | 3.7md | 135 km N of Suárez, Puerto Rico 19.639°, -65.654° | 33.0 km | - | - | - | ✓ Reviewed | USGS → |
At 16:31 UTC on August 29, 2023, a magnitude 3.7 tremor occurred 135 km N of Suárez, Puerto Rico. The event was offshore. See the M3.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 16:23:06 UTC | 2.1ml | 50 km WSW of Nikolski, Alaska 52.689°, -169.489° | 10.1 km | - | - | - | ✓ Reviewed | USGS → |
August 29, 2023 brought a magnitude 2.1 earthquake 50 km WSW of Nikolski, Alaska, logged at 16:23 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 16:22:49 UTC | 2.2md | 1 km NW of Fuig, Puerto Rico 18.000°, -66.925° | 16.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 1 km NW of Fuig, Puerto Rico on August 29, 2023 at 16:22 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-29 2023-08-29 16:17:19 UTC | 2.9ml | 40 km SSE of False Pass, Alaska 54.501°, -163.255° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.9 earthquake 40 km SSE of False Pass, Alaska came in on August 29, 2023 at 16:17 UTC. See the M2.9 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 29, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.