Earthquakes on August 16, 2023
266
EARTHQUAKES on August 16, 2023
24-hour UTC period · USGS data
LARGEST: M6.5 — 35 km W of Sola, Vanuatu
188 km deep · 10 people felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
5
M4.0–4.9
38
M3.0–3.9
9
M2.0–2.9
40
M1.0–1.9
174
Activity Summary
266
Total earthquakes
~250
Daily average
Normal
Activity level
5
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
6.5
35 km W of Sola, Vanuatu
12:47 UTC · 188.0 km deep
Felt by 10
5.5
south of the Fiji Islands
16:00 UTC · 28.9 km deep
5.3
150 km S of Severo-Kuril?sk, Russia
15:02 UTC · 20.6 km deep
5.1
31 km NNE of Türkmenbaşy, Turkmenistan
01:37 UTC · 50.6 km deep
Felt by 5
5.0
151 km NNW of Sola, Vanuatu
04:09 UTC · 225.3 km deep
Felt by 1
4.9
south of Tonga
16:39 UTC · 29.9 km deep
4.8
169 km S of Severo-Kuril’sk, Russia
18:43 UTC · 30.8 km deep
4.8
West Chile Rise
10:32 UTC · 10.0 km deep
Earthquake Map — August 16, 2023
All Earthquakes — August 16, 2023
Showing 30 of 92 (filtered from 266)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-08-16 2023-08-16 23:49:44 UTC | 4.2mb | south of the Fiji Islands -22.006°, -179.415° | 591.1 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.2 earthquake south of the Fiji Islands with origin time 23:49 UTC on August 16, 2023. 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. | ||||||||
2023-08-16 2023-08-16 23:47:18 UTC | 4.3mb | 25 km ENE of Port-Olry, Vanuatu -14.972°, 167.303° | 122.6 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 4.3 seismic event took place 25 km ENE of Port-Olry, Vanuatu on August 16, 2023 at 23:47 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 23:03:43 UTC | 2.2ml | Alaska Peninsula 57.399°, -156.193° | 82.0 km | - | - | - | ✓ Reviewed | USGS → |
At 23:03 UTC on August 16, 2023, a magnitude 2.2 tremor occurred near Alaska Peninsula. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 22:53:09 UTC | 4.6mb | 137 km NW of Ternate, Indonesia 1.511°, 126.374° | 55.6 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.6 earthquake 137 km NW of Ternate, Indonesia with origin time 22:53 UTC on August 16, 2023. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 22:19:35 UTC | 4.0mb | 229 km W of Adak, Alaska 52.107°, -179.949° | 222.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.0 earthquake was recorded 229 km W of Adak, Alaska on August 16, 2023 at 22:19 UTC. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 22:11:45 UTC | 2.6ml | 43 km NNE of Kobuk, Alaska 67.286°, -156.613° | 11.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.6 event was detected 43 km NNE of Kobuk, Alaska on August 16, 2023, with origin time 22:11 UTC. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 22:10:27 UTC | 2.2md | 13 km N of Puako, Hawaii 20.093°, -155.837° | 22.2 km | - | - | - | ✓ Reviewed | USGS → |
On August 16, 2023, worldwide seismic activity registered a magnitude 2.2 earthquake 13 km N of Puako, Hawaii at 22:10 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 21:44:26 UTC | 2.2ml | 15 km WSW of Watonga, Oklahoma 35.790°, -98.574° | 7.0 km | 1 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.2 earthquake 15 km WSW of Watonga, Oklahoma at 21:44 UTC on August 16, 2023. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 21:14:29 UTC | 2.5ml | 45 km NW of Atka, Alaska 52.491°, -174.655° | 177.7 km | - | - | - | ✓ Reviewed | USGS → |
August 16, 2023 brought a magnitude 2.5 earthquake 45 km NW of Atka, Alaska, logged at 21:14 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 21:08:54 UTC | 4.5mwr | North of the Virgin Islands 20.169°, -64.194° | 23.9 km | 5 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.5 earthquake North of the Virgin Islands at 21:08 UTC on August 16, 2023. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 21:05:42 UTC | 4.6mb | 81 km E of Kokopo, Papua New Guinea -4.256°, 152.998° | 13.3 km | - | - | - | ✓ Reviewed | USGS → |
On August 16, 2023, worldwide seismic activity registered a magnitude 4.6 earthquake 81 km E of Kokopo, Papua New Guinea at 21:05 UTC. The event was offshore. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 20:49:01 UTC | 3.7ml | 62 km SE of King Salmon, Alaska 58.229°, -156.042° | 154.4 km | - | II | - | ✓ Reviewed | USGS → |
On August 16, 2023, worldwide seismic activity registered a magnitude 3.7 earthquake 62 km SE of King Salmon, Alaska at 20:49 UTC. The event was offshore. See the M3.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 19:00:52 UTC | 2.2ml | 3 km NW of Mount Hood Village, Oregon 45.382°, -122.013° | -1.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 earthquake was recorded 3 km NW of Mount Hood Village, Oregon on August 16, 2023 at 19:00 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. | ||||||||
2023-08-16 2023-08-16 18:43:47 UTC | 4.8mb | 169 km S of Severo-Kuril’sk, Russia 49.149°, 156.226° | 30.8 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.8 event was detected 169 km S of Severo-Kuril’sk, Russia on August 16, 2023, with origin time 18:43 UTC. The event was offshore. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 18:42:13 UTC | 3.5ml | Rat Islands, Aleutian Islands, Alaska 51.235°, 175.104° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.5 seismic event took place near Rat Islands, Aleutian Islands, Alaska on August 16, 2023 at 18:42 UTC. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 17:21:57 UTC | 4.0mb | 299 km NE of Lospalos, Timor Leste -6.791°, 129.081° | 230.7 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.0 earthquake 299 km NE of Lospalos, Timor Leste with origin time 17:21 UTC on August 16, 2023. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 16:48:47 UTC | 4.4mb | 223 km WSW of Lata, Solomon Islands -11.242°, 163.817° | 45.9 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.4 earthquake 223 km WSW of Lata, Solomon Islands at 16:48 UTC on August 16, 2023. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 16:39:59 UTC | 4.9mb | south of Tonga -24.415°, -175.965° | 29.9 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.9 earthquake south of Tonga at 16:39 UTC on August 16, 2023. See the M4.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 16:09:22 UTC | 4.2mb | south of the Fiji Islands -23.445°, -179.571° | 536.1 km | - | - | - | ✓ Reviewed | USGS → |
On August 16, 2023, worldwide seismic activity registered a magnitude 4.2 earthquake south of the Fiji Islands at 16:09 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 16:04:49 UTC | 2.1ml | 45 km NW of Toyah, Texas 31.618°, -104.123° | 5.8 km | - | - | - | ✓ Reviewed | USGS → |
August 16, 2023 brought a magnitude 2.1 earthquake 45 km NW of Toyah, Texas, logged at 16:04 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.3 earthquake that occurred about 9 hours earlier. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 16:00:22 UTC | 5.5mww | south of the Fiji Islands -24.592°, -176.008° | 28.9 km | - | - | green | ✓ Reviewed | USGS → |
A magnitude 5.5 earthquake was recorded south of the Fiji Islands on August 16, 2023 at 16:00 UTC. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. See the M5.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 15:56:26 UTC | 2.0md | 15 km WSW of Toms Place, CA 37.534°, -118.846° | -1.7 km | - | - | - | ✓ Reviewed | USGS → |
August 16, 2023 brought a magnitude 2.0 earthquake 15 km WSW of Toms Place, CA, logged at 15:56 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. | ||||||||
2023-08-16 2023-08-16 15:55:42 UTC | 4.5mwr | 112 km N of Barrancas, Argentina -35.809°, -69.876° | 169.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.5 event was detected 112 km N of Barrancas, Argentina on August 16, 2023, with origin time 15:55 UTC. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 15:44:11 UTC | 2.2ml | 96 km SSW of Nikolski, Alaska 52.137°, -169.387° | 25.1 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.2 event was detected 96 km SSW of Nikolski, Alaska on August 16, 2023, with origin time 15:44 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.5 earthquake that occurred about 6 hours earlier. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 15:35:31 UTC | 4.4mb | 94 km NW of Malango, Solomon Islands -9.131°, 159.068° | 541.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.4 event was detected 94 km NW of Malango, Solomon Islands on August 16, 2023, with origin time 15:35 UTC. 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. | ||||||||
2023-08-16 2023-08-16 15:29:26 UTC | 4.3mb | Kermadec Islands, New Zealand -30.575°, -177.523° | 22.7 km | - | - | - | ✓ Reviewed | USGS → |
August 16, 2023 brought a magnitude 4.3 earthquake near Kermadec Islands, New Zealand, logged at 15:29 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 15:11:51 UTC | 4.7mb | 163 km S of Severo-Kuril’sk, Russia 49.206°, 155.995° | 38.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.7 seismic event took place 163 km S of Severo-Kuril’sk, Russia on August 16, 2023 at 15:11 UTC. Coming 1 hours after a magnitude 5.3 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 15:08:46 UTC | 4.3mb | 165 km S of Severo-Kuril’sk, Russia 49.190°, 156.055° | 43.5 km | - | - | - | ✓ Reviewed | USGS → |
On August 16, 2023 at 15:08 UTC, a magnitude 4.3 earthquake struck 165 km S of Severo-Kuril’sk, Russia. It arrived roughly 1 hours after a larger magnitude 5.3 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-16 2023-08-16 15:03:15 UTC | 2.1ml | Oregon 44.787°, -122.663° | -0.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place near Oregon on August 16, 2023 at 15:03 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. | ||||||||
2023-08-16 2023-08-16 15:02:40 UTC | 5.3mww | 150 km S of Severo-Kuril?sk, Russia 49.321°, 156.046° | 20.6 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 5.3 earthquake 150 km S of Severo-Kuril?sk, Russia with origin time 15:02 UTC on August 16, 2023. The event was offshore. See the M5.3 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 16, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.