Earthquakes on October 28, 2023
390
EARTHQUAKES on October 28, 2023
24-hour UTC period · USGS data
LARGEST: M5.6 — 96 km NNW of Sola, Vanuatu
200 km deep
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
9
M4.0–4.9
42
M3.0–3.9
15
M2.0–2.9
80
M1.0–1.9
244
Activity Summary
390
Total earthquakes
~250
Daily average
Elevated
Activity level
9
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
5.6
96 km NNW of Sola, Vanuatu
09:55 UTC · 200.0 km deep
5.5
98 km N of Manatutu, Timor Leste
13:04 UTC · 10.0 km deep
5.5
69 km WNW of Kirakira, Solomon Islands
05:31 UTC · 74.5 km deep
5.5
126 km WNW of Houma, Tonga
04:33 UTC · 214.3 km deep
Felt by 1
5.4
296 km N of Palu, Indonesia
15:01 UTC · 24.3 km deep
5.3
Pagan region, Northern Mariana Islands
08:08 UTC · 125.1 km deep
5.3
55 km SSW of Covenant Life, Alaska
03:44 UTC · 5.9 km deep
Felt by 415
5.1
50 km SSW of Covenant Life, Alaska
03:01 UTC · 7.2 km deep
Felt by 283
Earthquake Map — October 28, 2023
All Earthquakes — October 28, 2023
Showing 30 of 146 (filtered from 390)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-10-28 2023-10-28 23:33:27 UTC | 2.5md | Puerto Rico region 18.034°, -66.795° | 15.7 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.5 event was detected in the Puerto Rico region on October 28, 2023, with origin time 23:33 UTC. It arrived roughly 17 hours after a larger magnitude 2.8 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. | ||||||||
2023-10-28 2023-10-28 23:11:09 UTC | 3.2ml | 76 km SW of Port Clarence, Alaska 64.805°, -168.049° | 24.4 km | - | - | - | ✓ Reviewed | USGS → |
On October 28, 2023 at 23:11 UTC, a magnitude 3.2 earthquake struck 76 km SW of Port Clarence, Alaska. The event was offshore. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 23:01:10 UTC | 2.5md | 4 km SW of La Parguera, Puerto Rico 17.947°, -67.070° | 8.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 earthquake was recorded 4 km SW of La Parguera, Puerto Rico on October 28, 2023 at 23:01 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.0 earthquake that occurred about 18 hours earlier. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 22:19:34 UTC | 4.2mb | Volcano Islands, Japan region 23.076°, 141.446° | 255.7 km | - | - | - | ✓ Reviewed | USGS → |
On October 28, 2023 at 22:19 UTC, a magnitude 4.2 earthquake struck in the Volcano Islands, Japan region. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 22:18:36 UTC | 4.0mb | 277 km W of Abepura, Indonesia -2.843°, 138.151° | 46.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.0 seismic event took place 277 km W of Abepura, Indonesia on October 28, 2023 at 22:18 UTC. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 22:17:56 UTC | 4.9mb | 299 km ESE of Tadine, New Caledonia -22.567°, 170.569° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
October 28, 2023 brought a magnitude 4.9 earthquake 299 km ESE of Tadine, New Caledonia, logged at 22:17 UTC. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 22:15:00 UTC | 4.9mb | 120 km NE of Neiafu, Tonga -18.037°, -173.046° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On October 28, 2023 at 22:15 UTC, a magnitude 4.9 earthquake struck 120 km NE of Neiafu, Tonga. The event was offshore. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 21:59:15 UTC | 4.5mb | 292 km SW of Severo-Kuril’sk, Russia 48.576°, 153.689° | 112.2 km | - | - | - | ✓ Reviewed | USGS → |
October 28, 2023 brought a magnitude 4.5 earthquake 292 km SW of Severo-Kuril’sk, Russia, logged at 21:59 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 21:42:56 UTC | 4.8mb | Vanuatu region -17.074°, 171.662° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.8 earthquake was recorded in the Vanuatu region on October 28, 2023 at 21:42 UTC. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 21:14:33 UTC | 2.0ml(texnet) | 56 km S of Whites City, New Mexico 31.669°, -104.334° | 5.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 56 km S of Whites City, New Mexico with origin time 21:14 UTC on October 28, 2023. It arrived roughly 15 hours after a larger magnitude 2.4 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 21:13:11 UTC | 2.9ml | Rat Islands, Aleutian Islands, Alaska 51.615°, 177.818° | 60.6 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.9 earthquake near Rat Islands, Aleutian Islands, Alaska came in on October 28, 2023 at 21:13 UTC. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 21:00:21 UTC | 2.6ml | 59 km NE of Nikolski, Alaska 53.302°, -168.212° | 89.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.6 event was detected 59 km NE of Nikolski, Alaska on October 28, 2023, with origin time 21:00 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 20:59:53 UTC | 4.6mb | 44 km W of Hihifo, Tonga -15.947°, -174.211° | 146.3 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.6 earthquake 44 km W of Hihifo, Tonga at 20:59 UTC on October 28, 2023. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 20:49:13 UTC | 4.6mb | west of Macquarie Island -57.489°, 147.904° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.6 event was detected west of Macquarie Island on October 28, 2023, with origin time 20:49 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 20:33:40 UTC | 2.9ml | 49 km SSW of Covenant Life, Alaska 59.032°, -136.439° | 6.5 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 seismic event took place 49 km SSW of Covenant Life, Alaska on October 28, 2023 at 20:33 UTC. Coming 17 hours after a magnitude 5.3 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 20:33:39 UTC | 2.7ml | 50 km SSW of Covenant Life, Alaska 59.035°, -136.489° | 6.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.7 seismic event took place 50 km SSW of Covenant Life, Alaska on October 28, 2023 at 20:33 UTC. It arrived roughly 17 hours after a larger magnitude 5.3 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 20:29:53 UTC | 2.6md | 10 km SW of Volcano, Hawaii 19.372°, -155.300° | 2.5 km | - | - | - | Auto | USGS → |
On October 28, 2023 at 20:29 UTC, a magnitude 2.6 earthquake struck 10 km SW of Volcano, Hawaii. 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. | ||||||||
2023-10-28 2023-10-28 20:14:54 UTC | 3.9mb | 44 km W of Ollagüe, Chile -21.198°, -68.681° | 120.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.9 earthquake was recorded 44 km W of Ollagüe, Chile on October 28, 2023 at 20:14 UTC. The event was offshore. See the M3.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 19:39:36 UTC | 4.2mb | 4 km S of Piti Village, Guam 13.424°, 144.692° | 144.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.2 earthquake was recorded 4 km S of Piti Village, Guam on October 28, 2023 at 19:39 UTC. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 19:27:39 UTC | 5.0mww | 23 km NNW of Herāt, Afghanistan 34.549°, 62.114° | 10.0 km | 5 | - | - | ✓ Reviewed | USGS → |
A magnitude 5.0 seismic event took place 23 km NNW of Herāt, Afghanistan on October 28, 2023 at 19:27 UTC. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 19:25:58 UTC | 2.1ml | 8 km SSE of McCall, Idaho 44.841°, -116.043° | 3.2 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 8 km SSE of McCall, Idaho on October 28, 2023 at 19:25 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.9 earthquake that occurred about 11 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. | ||||||||
2023-10-28 2023-10-28 19:18:49 UTC | 2.7ml | 69 km N of Petersville, Alaska 63.116°, -150.596° | 113.1 km | - | - | - | ✓ Reviewed | USGS → |
October 28, 2023 brought a magnitude 2.7 earthquake 69 km N of Petersville, Alaska, logged at 19:18 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 19:17:37 UTC | 4.4mwr | 46 km ENE of Tocopilla, Chile -21.907°, -69.792° | 70.6 km | 1 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.4 earthquake 46 km ENE of Tocopilla, Chile came in on October 28, 2023 at 19:17 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 19:11:02 UTC | 4.2mb | 120 km NE of Petropavlovsk-Kamchatsky, Russia 53.682°, 160.116° | 63.6 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.2 earthquake 120 km NE of Petropavlovsk-Kamchatsky, Russia with origin time 19:11 UTC on October 28, 2023. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 19:08:51 UTC | 4.0mb | south of the Fiji Islands -23.816°, -179.700° | 544.0 km | - | - | - | ✓ Reviewed | USGS → |
October 28, 2023 brought a magnitude 4.0 earthquake south of the Fiji Islands, logged at 19:08 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 18:52:37 UTC | 4.4mb | 17 km W of San Pedro, Philippines 7.356°, 126.361° | 8.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.4 seismic event took place 17 km W of San Pedro, Philippines on October 28, 2023 at 18:52 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 18:50:02 UTC | 2.6ml | 140 km S of False Pass, Alaska 53.592°, -163.386° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.6 earthquake 140 km S of False Pass, Alaska came in on October 28, 2023 at 18:50 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 18:43:12 UTC | 3.5ml | 110 km W of Nikolski, Alaska 52.758°, -170.475° | 98.1 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.5 event was detected 110 km W of Nikolski, Alaska on October 28, 2023, with origin time 18:43 UTC. The event was offshore. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 18:32:56 UTC | 2.8ml | 170 km WSW of Adak, Alaska 51.414°, -178.982° | 31.9 km | - | - | - | ✓ Reviewed | USGS → |
On October 28, 2023, worldwide seismic activity registered a magnitude 2.8 earthquake 170 km WSW of Adak, Alaska at 18:32 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-10-28 2023-10-28 18:17:13 UTC | 2.5md | 5 km NNW of Walker, CA 38.552°, -119.507° | 5.0 km | 2 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.5 earthquake 5 km NNW of Walker, CA with origin time 18:17 UTC on October 28, 2023. Coming 13 hours after a magnitude 4.2 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.5 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 October 28, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.