Earthquakes on July 4, 2023
222
EARTHQUAKES on July 4, 2023
24-hour UTC period · USGS data
10 km deep
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
3
M4.0–4.9
29
M3.0–3.9
13
M2.0–2.9
43
M1.0–1.9
134
Activity Summary
222
Total earthquakes
~250
Daily average
Normal
Activity level
3
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
5.9
east of the South Sandwich Islands
12:01 UTC · 10.0 km deep
5.3
south of the Kermadec Islands
16:05 UTC · 57.4 km deep
5.3
273 km SSW of ‘Ohonua, Tonga
00:18 UTC · 10.0 km deep
4.9
293 km SSW of ‘Ohonua, Tonga
01:23 UTC · 34.8 km deep
4.8
285 km W of Morondava, Madagascar
16:59 UTC · 10.0 km deep
4.7
South Sandwich Islands region
22:01 UTC · 10.0 km deep
4.6
Vanuatu
19:05 UTC · 53.5 km deep
4.6
Bonin Islands, Japan region
16:32 UTC · 451.8 km deep
Earthquake Map — July 4, 2023
All Earthquakes — July 4, 2023
Showing 30 of 88 (filtered from 222)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2023-07-04 2023-07-04 23:55:46 UTC | 2.1ml | 85 km NW of Karluk, Alaska 58.192°, -155.297° | 1.5 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.1 earthquake 85 km NW of Karluk, Alaska with origin time 23:55 UTC on July 4, 2023. 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. | ||||||||
2023-07-04 2023-07-04 23:35:09 UTC | 2.0ml | Alaska Peninsula 57.131°, -156.465° | 7.5 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.0 earthquake near Alaska Peninsula with origin time 23:35 UTC on July 4, 2023. This event falls inside the aftershock decay of a nearby magnitude 2.3 earthquake that occurred about 5 hours earlier. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 23:31:16 UTC | 2.2ml | 83 km SSE of Kokhanok, Alaska 58.742°, -154.249° | 97.7 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.2 event was detected 83 km SSE of Kokhanok, Alaska on July 4, 2023, with origin time 23:31 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 22:19:04 UTC | 4.4mb | 155 km N of Likisá, Timor Leste -7.192°, 125.204° | 472.2 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.4 earthquake 155 km N of Likisá, Timor Leste at 22:19 UTC on July 4, 2023. 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. | ||||||||
2023-07-04 2023-07-04 22:09:30 UTC | 3.0ml | 112 km ESE of Akutan, Alaska 53.824°, -164.140° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.0 earthquake was recorded 112 km ESE of Akutan, Alaska on July 4, 2023 at 22:09 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 22:01:59 UTC | 4.7mb | South Sandwich Islands region -56.001°, -25.302° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.7 earthquake in the South Sandwich Islands region at 22:01 UTC on July 4, 2023. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 21:47:28 UTC | 4.4mb | 112 km ENE of Teknāf, Bangladesh 21.169°, 93.330° | 62.2 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.4 event was detected 112 km ENE of Teknāf, Bangladesh on July 4, 2023, with origin time 21:47 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 21:37:53 UTC | 4.0mb | east of Severnaya Zemlya 81.661°, 120.995° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.0 earthquake east of Severnaya Zemlya came in on July 4, 2023 at 21:37 UTC. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 21:00:54 UTC | 3.7mb | 142 km SW of Adak, Alaska 51.164°, -178.349° | 35.9 km | - | II | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 3.7 earthquake 142 km SW of Adak, Alaska at 21:00 UTC on July 4, 2023. The event was offshore. See the M3.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 20:59:41 UTC | 2.0ml | 18 km SSW of Emery, Utah 38.775°, -111.355° | 14.3 km | - | - | - | ✓ Reviewed | USGS → |
July 4, 2023 brought a magnitude 2.0 earthquake 18 km SSW of Emery, Utah, logged at 20:59 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 19:53:41 UTC | 2.0ml | 56 km ENE of Pedro Bay, Alaska 59.987°, -153.188° | 125.5 km | - | - | - | ✓ Reviewed | USGS → |
On July 4, 2023, worldwide seismic activity registered a magnitude 2.0 earthquake 56 km ENE of Pedro Bay, Alaska at 19:53 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 19:41:43 UTC | 2.1ml | 7 km NNE of Pāhala, Hawaii 19.267°, -155.447° | 31.3 km | - | - | - | Auto | USGS → |
On July 4, 2023 at 19:41 UTC, a magnitude 2.1 earthquake struck 7 km NNE of Pāhala, Hawaii. This event falls inside the aftershock decay of a nearby magnitude 2.3 earthquake that occurred about 11 hours earlier. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 19:41:18 UTC | 2.0ml | 7 km NNE of Pāhala, Hawaii 19.261°, -155.439° | 28.6 km | - | - | - | Auto | USGS → |
On July 4, 2023 at 19:41 UTC, a magnitude 2.0 earthquake struck 7 km NNE of Pāhala, Hawaii. Coming 11 hours after a magnitude 2.3 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 19:35:05 UTC | 2.3ml | Alaska Peninsula 57.791°, -155.908° | 8.0 km | - | - | - | ✓ Reviewed | USGS → |
July 4, 2023 brought a magnitude 2.3 earthquake near Alaska Peninsula, logged at 19:35 UTC. Coming 4 hours after a magnitude 2.5 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 19:05:35 UTC | 4.5mb | 278 km SSW of ‘Ohonua, Tonga -23.792°, -175.582° | 22.5 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.5 earthquake was recorded 278 km SSW of ‘Ohonua, Tonga on July 4, 2023 at 19:05 UTC. Coming 18 hours after a magnitude 4.9 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 19:05:34 UTC | 4.6mb | Vanuatu -14.803°, 166.747° | 53.5 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.6 event was detected near Vanuatu on July 4, 2023, with origin time 19:05 UTC. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 18:54:55 UTC | 2.3ml | 73 km SE of Ugashik, Alaska 57.149°, -156.386° | 3.8 km | - | - | - | ✓ Reviewed | USGS → |
On July 4, 2023 at 18:54 UTC, a magnitude 2.3 earthquake struck 73 km SE of Ugashik, Alaska. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 18:32:50 UTC | 2.2ml | 10 km N of Independence, CA 36.889°, -118.195° | 11.8 km | - | - | - | ✓ Reviewed | USGS → |
At 18:32 UTC on July 4, 2023, a magnitude 2.2 tremor occurred 10 km N of Independence, CA. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 17:59:09 UTC | 4.4mb | 235 km E of Levuka, Fiji -17.965°, -178.461° | 616.5 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.4 earthquake 235 km E of Levuka, Fiji came in on July 4, 2023 at 17:59 UTC. This is the deepest earthquake in the current dataset — a deep-focus event. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 17:04:51 UTC | 2.1md | 2 km SW of Santo Domingo, Puerto Rico 18.046°, -66.766° | 14.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 earthquake was recorded 2 km SW of Santo Domingo, Puerto Rico on July 4, 2023 at 17:04 UTC. The event was offshore. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 16:59:48 UTC | 4.8mb | 285 km W of Morondava, Madagascar -19.814°, 41.635° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
At 16:59 UTC on July 4, 2023, a magnitude 4.8 tremor occurred 285 km W of Morondava, Madagascar. The event was offshore. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 16:43:35 UTC | 4.0mb | 66 km E of Mulegé, Mexico 26.882°, -111.317° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.0 seismic event took place 66 km E of Mulegé, Mexico on July 4, 2023 at 16:43 UTC. The event was offshore. See the M4.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 16:35:09 UTC | 2.0md | 2 km SSE of Maria Antonia, Puerto Rico 17.955°, -66.877° | 14.5 km | - | - | - | ✓ Reviewed | USGS → |
At 16:35 UTC on July 4, 2023, a magnitude 2.0 tremor occurred 2 km SSE of Maria Antonia, Puerto Rico. It arrived roughly 12 hours after a larger magnitude 2.7 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 16:32:08 UTC | 4.6mb | Bonin Islands, Japan region 28.632°, 139.409° | 451.8 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.6 earthquake in the Bonin Islands, Japan region came in on July 4, 2023 at 16:32 UTC. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 16:25:47 UTC | 2.2ml | 98 km ESE of Nikolski, Alaska 52.477°, -167.617° | 25.4 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.2 earthquake 98 km ESE of Nikolski, Alaska came in on July 4, 2023 at 16:25 UTC. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 16:05:26 UTC | 5.3mww | south of the Kermadec Islands -33.051°, -179.408° | 57.4 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 5.3 earthquake was recorded south of the Kermadec Islands on July 4, 2023 at 16:05 UTC. See the M5.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 15:52:54 UTC | 2.7ml | 1 km NW of Maple Valley, Washington 47.400°, -122.055° | 13.3 km | 6 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.7 seismic event took place 1 km NW of Maple Valley, Washington on July 4, 2023 at 15:52 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 15:52:42 UTC | 3.3md | 31 km N of Tierras Nuevas Poniente, Puerto Rico 18.743°, -66.498° | 67.2 km | 2 | - | - | ✓ Reviewed | USGS → |
This magnitude 3.3 event was detected 31 km N of Tierras Nuevas Poniente, Puerto Rico on July 4, 2023, with origin time 15:52 UTC. The event was offshore. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 15:35:43 UTC | 2.5ml | 90 km WNW of Karluk, Alaska 57.752°, -155.932° | 12.1 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.5 earthquake 90 km WNW of Karluk, Alaska at 15:35 UTC on July 4, 2023. In the 72 hours after this event, the USGS recorded 3 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2023-07-04 2023-07-04 15:17:43 UTC | 4.2mwr | Antofagasta, Chile -23.423°, -69.470° | 78.4 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.2 earthquake near Antofagasta, Chile with origin time 15:17 UTC on July 4, 2023. See the M4.2 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 July 4, 2023. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.