Earthquakes on September 29, 2023
247
EARTHQUAKES on September 29, 2023
24-hour UTC period · USGS data
51 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
5
M4.0–4.9
34
M3.0–3.9
7
M2.0–2.9
47
M1.0–1.9
154
Activity Summary
247
Total earthquakes
~250
Daily average
Normal
Activity level
5
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.6
114 km ESE of Kokopo, Papua New Guinea
01:19 UTC · 50.9 km deep
5.2
South Sandwich Islands region
22:36 UTC · 35.0 km deep
5.1
296 km ENE of Alotau, Papua New Guinea
16:51 UTC · 10.0 km deep
5.0
122 km SE of Lajes das Flores, Portugal
19:05 UTC · 14.1 km deep
5.0
114 km SE of Kokopo, Papua New Guinea
01:53 UTC · 35.0 km deep
4.8
210 km S of ‘Ohonua, Tonga
19:42 UTC · 10.0 km deep
4.7
272 km ESE of Levuka, Fiji
22:58 UTC · 591.8 km deep
4.7
61 km SSE of Alo, Wallis and Futuna
08:58 UTC · 364.5 km deep
Earthquake Map — September 29, 2023
All Earthquakes — September 29, 2023
Showing 30 of 93 (filtered from 247)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-09-29 2023-09-29 23:55:00 UTC | 4.5mb | 70 km SSW of Sarangani, Philippines 4.852°, 125.135° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.5 earthquake 70 km SSW of Sarangani, Philippines with origin time 23:55 UTC on September 29, 2023. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 23:47:59 UTC | 2.1ml(texnet) | 42 km NW of Toyah, Texas 31.564°, -104.136° | 6.6 km | - | - | - | ✓ Reviewed | USGS → |
September 29, 2023 brought a magnitude 2.1 earthquake 42 km NW of Toyah, Texas, logged at 23:47 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.5 earthquake that occurred about 4 hours earlier. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 23:44:48 UTC | 2.3ml | Alaska Peninsula 55.439°, -160.523° | 72.7 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.3 earthquake was recorded near Alaska Peninsula on September 29, 2023 at 23:44 UTC. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 23:01:11 UTC | 2.4ml | 60 km WSW of Nanwalek, Alaska 59.151°, -152.897° | 70.2 km | - | - | - | ✓ Reviewed | USGS → |
At 23:01 UTC on September 29, 2023, a magnitude 2.4 tremor occurred 60 km WSW of Nanwalek, Alaska. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 22:58:25 UTC | 4.7mb | 272 km ESE of Levuka, Fiji -19.338°, -178.472° | 591.8 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.7 event was detected 272 km ESE of Levuka, Fiji on September 29, 2023, with origin time 22:58 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 22:37:08 UTC | 2.5ml | Rat Islands, Aleutian Islands, Alaska 51.540°, 178.948° | 76.5 km | - | - | - | ✓ Reviewed | USGS → |
September 29, 2023 brought a magnitude 2.5 earthquake near Rat Islands, Aleutian Islands, Alaska, logged at 22:37 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 22:36:09 UTC | 5.2mb | South Sandwich Islands region -57.972°, -25.437° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 5.2 earthquake was recorded in the South Sandwich Islands region on September 29, 2023 at 22:36 UTC. See the M5.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 22:09:17 UTC | 4.1mb | Maug Islands region, Northern Mariana Islands 20.136°, 144.980° | 173.8 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.1 event was detected in the Maug Islands region, Northern Mariana Islands on September 29, 2023, with origin time 22:09 UTC. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 20:25:53 UTC | 4.5mb | 75 km NE of Sanana, Indonesia -1.527°, 126.407° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 29, 2023, worldwide seismic activity registered a magnitude 4.5 earthquake 75 km NE of Sanana, Indonesia at 20:25 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 20:20:34 UTC | 3.2md | 44 km NW of San Antonio, Puerto Rico 18.778°, -67.389° | 9.4 km | - | - | - | ✓ Reviewed | USGS → |
On September 29, 2023, worldwide seismic activity registered a magnitude 3.2 earthquake 44 km NW of San Antonio, Puerto Rico at 20:20 UTC. The event was offshore. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 20:17:34 UTC | 4.2mb | Davis Strait 60.402°, -63.694° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.2 earthquake near Davis Strait with origin time 20:17 UTC on September 29, 2023. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 20:14:40 UTC | 2.5ml(texnet) | 30 km NW of Toyah, Texas 31.519°, -104.007° | 6.9 km | - | - | - | ✓ Reviewed | USGS → |
On September 29, 2023 at 20:14 UTC, a magnitude 2.5 earthquake struck 30 km NW of Toyah, Texas. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 20:08:22 UTC | 2.9ml | 249 km WSW of Adak, Alaska 51.381°, 179.851° | 65.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.9 earthquake 249 km WSW of Adak, Alaska came in on September 29, 2023 at 20:08 UTC. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 19:52:34 UTC | 2.1ml | 115 km E of Chignik, Alaska 56.295°, -156.534° | 27.0 km | - | - | - | ✓ Reviewed | USGS → |
On September 29, 2023 at 19:52 UTC, a magnitude 2.1 earthquake struck 115 km E of Chignik, Alaska. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 19:42:48 UTC | 4.8mb | 210 km S of ‘Ohonua, Tonga -23.238°, -175.119° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.8 earthquake 210 km S of ‘Ohonua, Tonga at 19:42 UTC on September 29, 2023. The event was offshore. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 19:38:55 UTC | 3.0md | 44 km NW of San Antonio, Puerto Rico 18.782°, -67.393° | 11.1 km | - | - | - | ✓ Reviewed | USGS → |
At 19:38 UTC on September 29, 2023, a magnitude 3.0 tremor occurred 44 km NW of San Antonio, Puerto Rico. The event was offshore. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 19:15:44 UTC | 2.4ml | 34 km NW of Stanley, Idaho 44.455°, -115.210° | 6.2 km | - | - | - | ✓ Reviewed | USGS → |
September 29, 2023 brought a magnitude 2.4 earthquake 34 km NW of Stanley, Idaho, logged at 19:15 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 19:13:26 UTC | 2.9ml | 2 km W of Heber, CA 32.731°, -115.555° | 12.6 km | 21 | - | - | ✓ Reviewed | USGS → |
On September 29, 2023 at 19:13 UTC, a magnitude 2.9 earthquake struck 2 km W of Heber, CA. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 19:06:58 UTC | 2.0ml | 49 km E of Juneau, Alaska 58.338°, -133.573° | 0.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 49 km E of Juneau, Alaska on September 29, 2023, with origin time 19:06 UTC. Coming 17 hours after a magnitude 2.8 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 M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 19:05:45 UTC | 5.0mww | 122 km SE of Lajes das Flores, Portugal 38.481°, -30.347° | 14.1 km | - | - | - | ✓ Reviewed | USGS → |
On September 29, 2023, worldwide seismic activity registered a magnitude 5.0 earthquake 122 km SE of Lajes das Flores, Portugal at 19:05 UTC. The event was offshore. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 19:03:59 UTC | 2.1ml | 2 km W of Heber, CA 32.730°, -115.553° | 13.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 2 km W of Heber, CA on September 29, 2023 at 19:03 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 18:58:12 UTC | 2.4md | 4 km SE of La Parguera, Puerto Rico 17.943°, -67.020° | 10.3 km | - | - | - | ✓ Reviewed | USGS → |
On September 29, 2023, worldwide seismic activity registered a magnitude 2.4 earthquake 4 km SE of La Parguera, Puerto Rico at 18:58 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 18:21:05 UTC | 4.6mb | Volcano Islands, Japan region 23.173°, 142.908° | 81.7 km | - | - | - | ✓ Reviewed | USGS → |
September 29, 2023 brought a magnitude 4.6 earthquake in the Volcano Islands, Japan region, logged at 18:21 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 17:18:11 UTC | 4.4mb | 48 km SW of Lata, Solomon Islands -11.011°, 165.463° | 55.5 km | - | - | - | ✓ Reviewed | USGS → |
On September 29, 2023 at 17:18 UTC, a magnitude 4.4 earthquake struck 48 km SW of Lata, Solomon Islands. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 17:00:25 UTC | 2.9ml | 66 km NW of San Felipe, Mexico 31.391°, -115.390° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 seismic event took place 66 km NW of San Felipe, Mexico on September 29, 2023 at 17:00 UTC. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 16:51:36 UTC | 5.1mww | 296 km ENE of Alotau, Papua New Guinea -8.935°, 152.777° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 5.1 earthquake 296 km ENE of Alotau, Papua New Guinea with origin time 16:51 UTC on September 29, 2023. See the M5.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 16:46:23 UTC | 2.1ml | 24 km NNW of Tehachapi, CA 35.318°, -118.573° | 4.1 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.1 earthquake 24 km NNW of Tehachapi, CA came in on September 29, 2023 at 16:46 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. | ||||||||
2023-09-29 2023-09-29 16:33:47 UTC | 4.5mb | 172 km ESE of Hihifo, Tonga -16.518°, -172.294° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 16:33 UTC on September 29, 2023, a magnitude 4.5 tremor occurred 172 km ESE of Hihifo, Tonga. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 16:24:54 UTC | 2.6md | Puerto Rico region 17.944°, -66.283° | 8.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.6 seismic event took place in the Puerto Rico region on September 29, 2023 at 16:24 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.0 earthquake that occurred about 1 hours earlier. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-09-29 2023-09-29 15:55:25 UTC | 2.7ml | 134 km SW of Adak, Alaska 51.203°, -178.249° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
At 15:55 UTC on September 29, 2023, a magnitude 2.7 tremor occurred 134 km SW of Adak, Alaska. The event was offshore. See the M2.7 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 September 29, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.