Earthquakes on August 7, 2023
284
EARTHQUAKES on August 7, 2023
24-hour UTC period · USGS data
LARGEST: M5.6 — South Sandwich Islands region
13 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
3
M4.0–4.9
42
M3.0–3.9
14
M2.0–2.9
64
M1.0–1.9
161
Activity Summary
284
Total earthquakes
~250
Daily average
Normal
Activity level
3
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
South Sandwich Islands
7
New Caledonia
2
Significant Earthquakes (M4.5+)
5.6
South Sandwich Islands region
23:49 UTC · 13.0 km deep
5.0
154 km SSE of Alo, Wallis and Futuna
23:33 UTC · 408.5 km deep
5.0
293 km SSE of Port Blair, India
07:23 UTC · 10.0 km deep
4.9
south of the Kermadec Islands
11:43 UTC · 10.0 km deep
Felt by 1
4.8
123 km WNW of Tamarindo, Costa Rica
04:33 UTC · 10.0 km deep
4.7
99 km SSW of La Libertad, El Salvador
13:12 UTC · 10.0 km deep
Felt by 1
4.6
southeast of the Loyalty Islands
13:26 UTC · 10.0 km deep
4.6
120 km ENE of Hasaki, Japan
09:14 UTC · 28.0 km deep
Felt by 1
Earthquake Map — August 7, 2023
All Earthquakes — August 7, 2023
Showing 30 of 123 (filtered from 284)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-08-07 2023-08-07 23:49:01 UTC | 5.6mww | South Sandwich Islands region -55.749°, -27.044° | 13.0 km | - | III | green | ✓ Reviewed | USGS → |
On August 7, 2023 at 23:49 UTC, a magnitude 5.6 earthquake struck in the South Sandwich Islands region. The USGS PAGER system assigned a green alert level for this event, signalling no significant casualties or damage expected. It is the largest earthquake currently listed for worldwide seismic activity on August 7, 2023. See the M5.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 23:48:01 UTC | 2.7md | 62 km SW of Captain Cook, Hawaii 19.139°, -156.383° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.7 earthquake 62 km SW of Captain Cook, Hawaii came in on August 7, 2023 at 23:48 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 23:33:10 UTC | 5.0mb | 154 km SSE of Alo, Wallis and Futuna -15.543°, -177.434° | 408.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 5.0 earthquake was recorded 154 km SSE of Alo, Wallis and Futuna on August 7, 2023 at 23:33 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M5.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 23:10:18 UTC | 2.0ml | 10 km W of Niland, CA 33.226°, -115.624° | 3.1 km | - | - | - | ✓ Reviewed | USGS → |
At 23:10 UTC on August 7, 2023, a magnitude 2.0 tremor occurred 10 km W of Niland, CA. 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. | ||||||||
2023-08-07 2023-08-07 22:43:12 UTC | 2.0ml | 150 km W of Adak, Alaska 51.721°, -178.802° | 88.2 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.0 earthquake 150 km W of Adak, Alaska came in on August 7, 2023 at 22:43 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 22:40:24 UTC | 2.1md | 1 km N of Guayanilla, Puerto Rico 18.035°, -66.791° | 14.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 1 km N of Guayanilla, Puerto Rico on August 7, 2023 at 22:40 UTC. Coming 7 hours after a magnitude 2.7 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 22:25:48 UTC | 2.3ml | 192 km S of Adak, Alaska 50.161°, -176.227° | 11.8 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.3 event was detected 192 km S of Adak, Alaska on August 7, 2023, with origin time 22:25 UTC. The event was offshore. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 22:23:48 UTC | 2.0ml | 85 km SSW of Unalaska, Alaska 53.129°, -166.842° | 25.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 seismic event took place 85 km SSW of Unalaska, Alaska on August 7, 2023 at 22:23 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 22:19:43 UTC | 4.1mb | 72 km SSW of Cabeza de Toro, Mexico 15.387°, -94.146° | 54.9 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.1 earthquake 72 km SSW of Cabeza de Toro, Mexico came in on August 7, 2023 at 22:19 UTC. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 21:44:59 UTC | 2.6ml | 230 km W of Port Orford, Oregon 42.968°, -127.302° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.6 seismic event took place 230 km W of Port Orford, Oregon on August 7, 2023 at 21:44 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 21:28:49 UTC | 2.4ml | 54 km E of Adak, Alaska 51.818°, -175.847° | 74.5 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.4 earthquake 54 km E of Adak, Alaska with origin time 21:28 UTC on August 7, 2023. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 21:10:19 UTC | 2.5ml | 156 km S of Atka, Alaska 50.812°, -174.597° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 7, 2023 at 21:10 UTC, a magnitude 2.5 earthquake struck 156 km S of Atka, Alaska. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 21:02:20 UTC | 3.0ml | 87 km SSW of Sand Point, Alaska 54.575°, -160.844° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 3.0 event was detected 87 km SSW of Sand Point, Alaska on August 7, 2023, with origin time 21:02 UTC. Coming 4 hours after a magnitude 3.6 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 20:57:44 UTC | 4.3mb | 39 km ENE of Mawlaik, Myanmar 23.743°, 94.780° | 109.0 km | - | - | - | ✓ Reviewed | USGS → |
At 20:57 UTC on August 7, 2023, a magnitude 4.3 tremor occurred 39 km ENE of Mawlaik, Myanmar. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 20:54:47 UTC | 2.0ml | 18 km W of Ninilchik, Alaska 60.068°, -152.003° | 89.1 km | - | - | - | ✓ Reviewed | USGS → |
August 7, 2023 brought a magnitude 2.0 earthquake 18 km W of Ninilchik, Alaska, logged at 20:54 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 20:51:17 UTC | 2.1ml | 10 km SSE of Soldotna, Alaska 60.407°, -150.972° | 52.6 km | - | - | - | ✓ Reviewed | USGS → |
On August 7, 2023 at 20:51 UTC, a magnitude 2.1 earthquake struck 10 km SSE of Soldotna, Alaska. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 20:42:30 UTC | 2.4ml | 28 km ESE of Denali National Park, Alaska 63.485°, -151.169° | 6.1 km | - | - | - | ✓ Reviewed | USGS → |
On August 7, 2023, worldwide seismic activity registered a magnitude 2.4 earthquake 28 km ESE of Denali National Park, Alaska at 20:42 UTC. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 20:36:45 UTC | 2.1md | 3 km NE of Yauco, Puerto Rico 18.054°, -66.821° | 20.2 km | - | - | - | ✓ Reviewed | USGS → |
On August 7, 2023 at 20:36 UTC, a magnitude 2.1 earthquake struck 3 km NE of Yauco, Puerto Rico. This event falls inside the aftershock decay of a nearby magnitude 2.7 earthquake that occurred about 5 hours earlier. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 20:35:56 UTC | 4.4mb | 125 km NNE of Lae, Papua New Guinea -5.611°, 147.219° | 151.7 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.4 event was detected 125 km NNE of Lae, Papua New Guinea on August 7, 2023, with origin time 20:35 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 20:23:43 UTC | 2.2md | 7 km SW of Guánica, Puerto Rico 17.922°, -66.958° | 16.4 km | - | - | - | ✓ Reviewed | USGS → |
On August 7, 2023 at 20:23 UTC, a magnitude 2.2 earthquake struck 7 km SW of Guánica, Puerto Rico. Coming 5 hours after a magnitude 2.7 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 20:16:55 UTC | 3.1ml | 124 km E of Chignik, Alaska 56.144°, -156.421° | 22.9 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.1 earthquake 124 km E of Chignik, Alaska with origin time 20:16 UTC on August 7, 2023. The event was offshore. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 20:03:53 UTC | 4.3mb | 21 km SSE of Los Chiles, Costa Rica 10.853°, -84.652° | 163.3 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.3 earthquake 21 km SSE of Los Chiles, Costa Rica at 20:03 UTC on August 7, 2023. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 20:01:15 UTC | 4.3mb | 276 km WNW of Longyearbyen, Svalbard and Jan Mayen 79.188°, 3.950° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.3 event was detected 276 km WNW of Longyearbyen, Svalbard and Jan Mayen on August 7, 2023, with origin time 20:01 UTC. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 19:58:52 UTC | 2.5md | 3 km WNW of Palmarejo, Puerto Rico 18.054°, -67.104° | 20.1 km | - | - | - | ✓ Reviewed | USGS → |
August 7, 2023 brought a magnitude 2.5 earthquake 3 km WNW of Palmarejo, Puerto Rico, logged at 19:58 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 19:55:09 UTC | 2.0ml | 22 km E of Glacier, Washington 48.869°, -121.634° | -1.2 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 22 km E of Glacier, Washington on August 7, 2023, with origin time 19:55 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. | ||||||||
2023-08-07 2023-08-07 19:50:29 UTC | 2.0ml | 28 km SE of Skwentna, Alaska 61.814°, -151.005° | 71.5 km | - | - | - | ✓ Reviewed | USGS → |
On August 7, 2023 at 19:50 UTC, a magnitude 2.0 earthquake struck 28 km SE of Skwentna, Alaska. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 19:24:32 UTC | 2.1ml | 20 km WNW of Stanley, Idaho 44.289°, -115.180° | 6.6 km | - | - | - | ✓ Reviewed | USGS → |
August 7, 2023 brought a magnitude 2.1 earthquake 20 km WNW of Stanley, Idaho, logged at 19:24 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 19:19:05 UTC | 2.0ml | 134 km WSW of Adak, Alaska 51.491°, -178.486° | 11.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 134 km WSW of Adak, Alaska on August 7, 2023 at 19:19 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 19:09:40 UTC | 2.1ml | 69 km NE of Port Alsworth, Alaska 60.653°, -153.434° | 175.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 69 km NE of Port Alsworth, Alaska on August 7, 2023 at 19:09 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-07 2023-08-07 18:07:42 UTC | 2.0ml | 67 km E of Port Alsworth, Alaska 60.135°, -153.101° | 127.2 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake 67 km E of Port Alsworth, Alaska with origin time 18:07 UTC on August 7, 2023. The event was offshore. See the M2.0 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 7, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.