Earthquakes on August 8, 2023
303
EARTHQUAKES on August 8, 2023
24-hour UTC period · USGS data
LARGEST: M6.1 — 105 km NE of Hihifo, Tonga
42 km deep · 16 people felt it
Elevated activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
2
M4.0–4.9
44
M3.0–3.9
18
M2.0–2.9
60
M1.0–1.9
179
Activity Summary
303
Total earthquakes
~250
Daily average
Elevated
Activity level
2
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
6.1
105 km NE of Hihifo, Tonga
18:38 UTC · 42.0 km deep
Felt by 16
5.5
39 km SSE of Ikungi, Tanzania
15:31 UTC · 7.0 km deep
Felt by 4
4.9
55 km SW of Bengkulu, Indonesia
15:30 UTC · 67.0 km deep
4.9
Izu Islands, Japan region
02:37 UTC · 10.0 km deep
4.9
163 km S of Dampit, Indonesia
01:22 UTC · 35.0 km deep
4.8
30 km SSW of Güiria, Venezuela
20:51 UTC · 13.2 km deep
4.8
23 km SE of Ikungi, Tanzania
20:28 UTC · 10.0 km deep
Felt by 1
4.8
33 km NNW of Guanaja, Honduras
08:12 UTC · 10.0 km deep
Felt by 6
Earthquake Map — August 8, 2023
All Earthquakes — August 8, 2023
Showing 30 of 124 (filtered from 303)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-08-08 2023-08-08 23:55:53 UTC | 2.0ml | 3 km WSW of Yacolt, Washington 45.850°, -122.449° | -0.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 3 km WSW of Yacolt, Washington on August 8, 2023 at 23:55 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. | ||||||||
2023-08-08 2023-08-08 23:50:39 UTC | 2.5ml | Fox Islands, Aleutian Islands, Alaska 52.639°, -166.539° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.5 earthquake near Fox Islands, Aleutian Islands, Alaska with origin time 23:50 UTC on August 8, 2023. This event falls inside the aftershock decay of a nearby magnitude 2.6 earthquake that occurred about 1 hours earlier. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 23:42:36 UTC | 4.5mb | 7 km WSW of Claveria, Philippines 18.590°, 121.017° | 27.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.5 earthquake 7 km WSW of Claveria, Philippines with origin time 23:42 UTC on August 8, 2023. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 23:30:32 UTC | 4.1mb | south of the Fiji Islands -24.337°, 178.838° | 542.4 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.1 earthquake south of the Fiji Islands came in on August 8, 2023 at 23:30 UTC. 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. | ||||||||
2023-08-08 2023-08-08 23:28:32 UTC | 2.3ml | 20 km NNW of Challis, Idaho 44.666°, -114.349° | 13.1 km | - | - | - | ✓ Reviewed | USGS → |
At 23:28 UTC on August 8, 2023, a magnitude 2.3 tremor occurred 20 km NNW of Challis, Idaho. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 23:22:29 UTC | 3.0ml | 124 km SSW of Atka, Alaska 51.236°, -175.117° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.0 earthquake was recorded 124 km SSW of Atka, Alaska on August 8, 2023 at 23:22 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 23:15:25 UTC | 4.4mb | 27 km SSE of Ikungi, Tanzania -5.351°, 34.886° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
August 8, 2023 brought a magnitude 4.4 earthquake 27 km SSE of Ikungi, Tanzania, logged at 23:15 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.5 earthquake that occurred about 8 hours earlier. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 23:11:50 UTC | 2.9md | 58 km W of Petrolia, CA 40.360°, -124.970° | 15.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 seismic event took place 58 km W of Petrolia, CA on August 8, 2023 at 23:11 UTC. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 22:58:50 UTC | 4.3mb | Tanzania -5.380°, 34.871° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.3 earthquake near Tanzania came in on August 8, 2023 at 22:58 UTC. It arrived roughly 7 hours after a larger magnitude 5.5 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 22:37:42 UTC | 2.2ml | 10 km NE of Coso Junction, CA 36.118°, -117.877° | 3.3 km | - | - | - | ✓ Reviewed | USGS → |
August 8, 2023 brought a magnitude 2.2 earthquake 10 km NE of Coso Junction, CA, logged at 22:37 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. | ||||||||
2023-08-08 2023-08-08 22:36:15 UTC | 3.7ml | 128 km S of Unalaska, Alaska 52.730°, -166.809° | 35.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.7 seismic event took place 128 km S of Unalaska, Alaska on August 8, 2023 at 22:36 UTC. The event was offshore. See the M3.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 22:34:51 UTC | 3.6ml | 55 km S of Whites City, New Mexico 31.678°, -104.408° | 6.9 km | - | IV | - | ✓ Reviewed | USGS → |
August 8, 2023 brought a magnitude 3.6 earthquake 55 km S of Whites City, New Mexico, logged at 22:34 UTC. The event was offshore. See the M3.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 22:32:45 UTC | 4.5mb | 41 km SE of Ikungi, Tanzania -5.432°, 34.986° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 8, 2023, worldwide seismic activity registered a magnitude 4.5 earthquake 41 km SE of Ikungi, Tanzania at 22:32 UTC. This event falls inside the aftershock decay of a nearby magnitude 5.5 earthquake that occurred about 7 hours earlier. The event was offshore. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 22:31:36 UTC | 3.4ml | 115 km S of Unalaska, Alaska 52.853°, -166.832° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.4 earthquake 115 km S of Unalaska, Alaska with origin time 22:31 UTC on August 8, 2023. The event was offshore. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 22:30:20 UTC | 2.6ml | 143 km S of Unalaska, Alaska 52.581°, -166.605° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
August 8, 2023 brought a magnitude 2.6 earthquake 143 km S of Unalaska, Alaska, logged at 22:30 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 22:04:21 UTC | 2.5mb_lg | 6 km N of Turner, Maine 44.316°, -70.257° | 9.4 km | 222 | - | - | ✓ Reviewed | USGS → |
On August 8, 2023, worldwide seismic activity registered a magnitude 2.5 earthquake 6 km N of Turner, Maine at 22:04 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 21:54:23 UTC | 2.1md | Puerto Rico region 17.938°, -66.860° | 11.8 km | - | - | - | ✓ Reviewed | USGS → |
On August 8, 2023 at 21:54 UTC, a magnitude 2.1 earthquake struck in the Puerto Rico region. Coming 17 hours after a magnitude 2.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 21:25:50 UTC | 2.0ml | Washington-British Columbia border region 48.052°, -123.525° | -0.5 km | 1 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake in the Washington-British Columbia border region with origin time 21:25 UTC on August 8, 2023. 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. | ||||||||
2023-08-08 2023-08-08 20:58:04 UTC | 2.1ml | 61 km S of Whites City, New Mexico 31.632°, -104.501° | 8.4 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.1 event was detected 61 km S of Whites City, New Mexico on August 8, 2023, with origin time 20:58 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.2 earthquake that occurred about 17 hours earlier. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 20:52:56 UTC | 2.3ml | 40 km ENE of Maneadero, B.C., MX 31.888°, -116.193° | 17.8 km | - | - | - | ✓ Reviewed | USGS → |
On August 8, 2023, worldwide seismic activity registered a magnitude 2.3 earthquake 40 km ENE of Maneadero, B.C., MX at 20:52 UTC. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 20:51:01 UTC | 4.8mb | 30 km SSW of Güiria, Venezuela 10.310°, -62.357° | 13.2 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.8 earthquake 30 km SSW of Güiria, Venezuela at 20:51 UTC on August 8, 2023. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 20:47:24 UTC | 2.4md | 13 km E of Naalehu, Hawaii 19.071°, -155.456° | 41.1 km | - | - | - | ✓ Reviewed | USGS → |
August 8, 2023 brought a magnitude 2.4 earthquake 13 km E of Naalehu, Hawaii, logged at 20:47 UTC. The event was offshore. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 20:28:23 UTC | 4.0md | 10 km SW of San Rafael del Yuma, Dominican Republic 18.363°, -68.746° | 116.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.0 event was detected 10 km SW of San Rafael del Yuma, Dominican Republic on August 8, 2023, with origin time 20:28 UTC. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 20:28:13 UTC | 4.8mb | 23 km SE of Ikungi, Tanzania -5.311°, 34.889° | 10.0 km | 1 | - | - | ✓ Reviewed | USGS → |
This magnitude 4.8 event was detected 23 km SE of Ikungi, Tanzania on August 8, 2023, with origin time 20:28 UTC. It arrived roughly 5 hours after a larger magnitude 5.5 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 19:50:55 UTC | 4.2mb | Maug Islands region, Northern Mariana Islands 19.698°, 145.222° | 168.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.2 earthquake was recorded in the Maug Islands region, Northern Mariana Islands on August 8, 2023 at 19:50 UTC. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 19:50:21 UTC | 2.0ml | 61 km NE of King Cove, Alaska 55.487°, -161.705° | 115.5 km | - | - | - | ✓ Reviewed | USGS → |
On August 8, 2023, worldwide seismic activity registered a magnitude 2.0 earthquake 61 km NE of King Cove, Alaska at 19:50 UTC. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 19:29:05 UTC | 4.5mb | Nicobar Islands, India region 9.007°, 93.909° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 19:29 UTC on August 8, 2023, a magnitude 4.5 tremor occurred in the Nicobar Islands, India region. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 19:27:02 UTC | 4.1mb | 12 km W of Cartagena, Chile -33.537°, -71.736° | 30.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.1 seismic event took place 12 km W of Cartagena, Chile on August 8, 2023 at 19:27 UTC. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 19:14:42 UTC | 4.4mb | 120 km NNE of Hihifo, Tonga -14.937°, -173.399° | 37.1 km | - | - | - | ✓ Reviewed | USGS → |
On August 8, 2023 at 19:14 UTC, a magnitude 4.4 earthquake struck 120 km NNE of Hihifo, Tonga. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-08-08 2023-08-08 19:05:21 UTC | 4.5mb | Izu Islands, Japan region 32.546°, 141.783° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.5 earthquake in the Izu Islands, Japan region at 19:05 UTC on August 8, 2023. See the M4.5 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 August 8, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.