Earthquakes on August 4, 2026
243
EARTHQUAKES on August 4, 2026
24-hour UTC period · USGS data
35 km deep · 3 people felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
2
M4.0–4.9
15
M3.0–3.9
28
M2.0–2.9
54
M1.0–1.9
144
Activity Summary
243
Total earthquakes
~250
Daily average
Normal
Activity level
2
M5.0+ events
Geographic Breakdown
By US State
Significant Earthquakes (M4.5+)
5.7
127 km NW of Ternate, Indonesia
20:16 UTC · 35.0 km deep
Felt by 3
5.1
south of Tonga
14:56 UTC · 10.0 km deep
4.8
43 km ESE of Koseda, Japan
19:56 UTC · 45.0 km deep
Felt by 1
4.7
Fiji region
20:30 UTC · 603.0 km deep
4.6
79 km E of Onagawa Chō, Japan
14:00 UTC · 40.4 km deep
Felt by 1
4.6
112 km WSW of Puerto Madero, Mexico
07:07 UTC · 10.0 km deep
Earthquake Map — August 4, 2026
All Earthquakes — August 4, 2026
Showing 30 of 99 (filtered from 243)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
4 days ago 2026-08-04 23:32:54 UTC | 2.5ml | 61 km W of Nikolski, Alaska 52.841°, -169.760° | 13.8 km | - | - | - | ✓ Reviewed | USGS → |
August 4, 2026 brought a magnitude 2.5 earthquake 61 km W of Nikolski, Alaska, logged at 23:32 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
4 days ago 2026-08-04 23:32:52 UTC | 2.4ml | 19 km E of Ferry, Alaska 64.029°, -148.709° | 1.4 km | - | - | - | ✓ Reviewed | USGS → |
At 23:32 UTC on August 4, 2026, a magnitude 2.4 tremor occurred 19 km E of Ferry, Alaska. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
4 days ago 2026-08-04 23:07:38 UTC | 2.2md | 1 km SSW of Guánica, Puerto Rico 17.956°, -66.913° | 14.8 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.2 earthquake 1 km SSW of Guánica, Puerto Rico at 23:07 UTC on August 4, 2026. This event falls inside the aftershock decay of a nearby magnitude 2.9 earthquake that occurred about 23 hours earlier. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
4 days ago 2026-08-04 23:04:24 UTC | 2.0md | 7 km SSE of Maria Antonia, Puerto Rico 17.921°, -66.854° | 14.6 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.0 earthquake was recorded 7 km SSE of Maria Antonia, Puerto Rico on August 4, 2026 at 23:04 UTC. This event falls inside the aftershock decay of a nearby magnitude 2.9 earthquake that occurred about 23 hours earlier. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
4 days ago 2026-08-04 22:48:50 UTC | 2.6ml | 66 km SSW of Pelican, Alaska 57.451°, -136.807° | 23.2 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.6 earthquake 66 km SSW of Pelican, Alaska with origin time 22:48 UTC on August 4, 2026. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 22:28:57 UTC | 2.8ml | Rat Islands, Aleutian Islands, Alaska 51.408°, 178.507° | 54.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.8 earthquake near Rat Islands, Aleutian Islands, Alaska with origin time 22:28 UTC on August 4, 2026. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 22:18:54 UTC | 2.6ml | 33 km SW of Atka, Alaska 51.962°, -174.515° | 141.3 km | - | - | - | ✓ Reviewed | USGS → |
On August 4, 2026, worldwide seismic activity registered a magnitude 2.6 earthquake 33 km SW of Atka, Alaska at 22:18 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 21:17:33 UTC | 2.6md | 7 km ESE of Cloverdale, CA 38.791°, -122.939° | 4.3 km | 9 | - | - | Auto | USGS → |
Reports of a magnitude 2.6 earthquake 7 km ESE of Cloverdale, CA came in on August 4, 2026 at 21:17 UTC. In the 72 hours after this event, the USGS recorded 4 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 21:08:54 UTC | 4.4mb | 62 km NE of Kuji, Japan 40.570°, 142.301° | 43.5 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.4 event was detected 62 km NE of Kuji, Japan on August 4, 2026, with origin time 21:08 UTC. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 20:54:11 UTC | 2.6md | 16 km ENE of Willows, CA 39.592°, -122.025° | 22.3 km | - | - | - | Auto | USGS → |
A magnitude 2.6 seismic event took place 16 km ENE of Willows, CA on August 4, 2026 at 20:54 UTC. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 20:53:18 UTC | 2.7ml | 259 km W of Adak, Alaska 51.985°, 179.595° | 198.2 km | - | - | - | ✓ Reviewed | USGS → |
At 20:53 UTC on August 4, 2026, a magnitude 2.7 tremor occurred 259 km W of Adak, Alaska. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 20:30:04 UTC | 4.7mb | Fiji region -21.795°, -179.356° | 603.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 4, 2026, worldwide seismic activity registered a magnitude 4.7 earthquake in the Fiji region at 20:30 UTC. This is the deepest earthquake in the current dataset — a deep-focus event. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 20:22:04 UTC | 2.9ml | 92 km SSE of Atka, Alaska 51.456°, -173.581° | 3.0 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.9 event was detected 92 km SSE of Atka, Alaska on August 4, 2026, with origin time 20:22 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.3 earthquake that occurred about 5 hours earlier. This very shallow event was close enough to the surface that even modest magnitudes can produce significant local shaking. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 20:16:37 UTC | 5.7mww | 127 km NW of Ternate, Indonesia 1.507°, 126.486° | 35.0 km | 3 | IV | green | ✓ Reviewed | USGS → |
On August 4, 2026 at 20:16 UTC, a magnitude 5.7 earthquake struck 127 km NW of Ternate, Indonesia. 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 4, 2026. See the M5.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 19:56:58 UTC | 4.8mww | 43 km ESE of Koseda, Japan 30.208°, 131.047° | 45.0 km | 1 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 4.8 earthquake 43 km ESE of Koseda, Japan with origin time 19:56 UTC on August 4, 2026. See the M4.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 19:55:25 UTC | 2.8md | 6 km NE of San Simeon, CA 35.682°, -121.136° | 6.9 km | 4 | - | - | Auto | USGS → |
On August 4, 2026, worldwide seismic activity registered a magnitude 2.8 earthquake 6 km NE of San Simeon, CA at 19:55 UTC. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 19:13:18 UTC | 2.1ml | 28 km SSE of Akutan, Alaska 53.917°, -165.543° | 111.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.1 seismic event took place 28 km SSE of Akutan, Alaska on August 4, 2026 at 19:13 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 18:04:15 UTC | 2.3md | 2 km ENE of Aromas, CA 36.897°, -121.620° | 0.8 km | - | - | - | Auto | USGS → |
This magnitude 2.3 event was detected 2 km ENE of Aromas, CA on August 4, 2026, with origin time 18:04 UTC. 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. | ||||||||
5 days ago 2026-08-04 17:43:40 UTC | 2.0md | 9 km NNW of Redwood Valley, CA 39.346°, -123.231° | 5.3 km | - | - | - | Auto | USGS → |
On August 4, 2026, worldwide seismic activity registered a magnitude 2.0 earthquake 9 km NNW of Redwood Valley, CA at 17:43 UTC. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 17:34:07 UTC | 2.0ml | 22 km WSW of Petersville, Alaska 62.436°, -151.188° | 84.1 km | - | - | - | ✓ Reviewed | USGS → |
At 17:34 UTC on August 4, 2026, a magnitude 2.0 tremor occurred 22 km WSW of Petersville, Alaska. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 17:30:51 UTC | 4.1mb | 179 km NE of Lospalos, Timor Leste -7.602°, 128.335° | 189.2 km | - | - | - | ✓ Reviewed | USGS → |
On August 4, 2026, worldwide seismic activity registered a magnitude 4.1 earthquake 179 km NE of Lospalos, Timor Leste at 17:30 UTC. The event was offshore. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 17:23:02 UTC | 2.2ml | 91 km W of Tyonek, Alaska 61.075°, -152.841° | 164.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 91 km W of Tyonek, Alaska on August 4, 2026 at 17:23 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 17:01:09 UTC | 2.1ml | 36 km WSW of Denali Park, Alaska 63.648°, -149.637° | 121.6 km | - | - | - | ✓ Reviewed | USGS → |
August 4, 2026 brought a magnitude 2.1 earthquake 36 km WSW of Denali Park, Alaska, logged at 17:01 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 16:45:37 UTC | 3.3ml | 181 km S of Adak, Alaska 50.242°, -176.775° | 12.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.3 earthquake was recorded 181 km S of Adak, Alaska on August 4, 2026 at 16:45 UTC. The event was offshore. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 16:30:01 UTC | 2.2ml | 114 km N of Yakutat, Alaska 60.574°, -139.731° | 3.5 km | - | - | - | ✓ Reviewed | USGS → |
August 4, 2026 brought a magnitude 2.2 earthquake 114 km N of Yakutat, Alaska, logged at 16:30 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. | ||||||||
5 days ago 2026-08-04 16:16:03 UTC | 3.3ml | 233 km ESE of Attu Station, Alaska 51.963°, 176.298° | 17.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 3.3 earthquake 233 km ESE of Attu Station, Alaska with origin time 16:16 UTC on August 4, 2026. Coming 12 hours after a magnitude 3.8 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 16:11:31 UTC | 4.1mb | south of the Fiji Islands -23.891°, -179.883° | 453.5 km | - | - | - | ✓ Reviewed | USGS → |
At 16:11 UTC on August 4, 2026, a magnitude 4.1 tremor occurred south of the Fiji Islands. 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. | ||||||||
5 days ago 2026-08-04 16:00:03 UTC | 3.0ml | 244 km ESE of Chiniak, Alaska 56.679°, -148.633° | 17.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 3.0 earthquake was recorded 244 km ESE of Chiniak, Alaska on August 4, 2026 at 16:00 UTC. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 15:58:34 UTC | 4.4mb | 10 km NNE of Xunchang, China 28.539°, 104.761° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.4 earthquake 10 km NNE of Xunchang, China came in on August 4, 2026 at 15:58 UTC. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-08-04 15:53:49 UTC | 2.2ml | 24 km NNE of Cooper Landing, Alaska 60.701°, -149.722° | 27.7 km | 1 | - | - | ✓ Reviewed | USGS → |
On August 4, 2026 at 15:53 UTC, a magnitude 2.2 earthquake struck 24 km NNE of Cooper Landing, Alaska. See the M2.2 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 August 4, 2026. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.