Earthquakes on August 23, 2026
279
EARTHQUAKES on August 23, 2026
24-hour UTC period · USGS data
LARGEST: M6.0 — 32 km SSW of Honchō, Japan
41 km deep · 12 people felt it
Normal activitycompared to daily average (~250/day)
Magnitude Breakdown
M5.0+
6
M4.0–4.9
35
M3.0–3.9
17
M2.0–2.9
63
M1.0–1.9
158
Activity Summary
279
Total earthquakes
~250
Daily average
Normal
Activity level
6
M5.0+ events
Geographic Breakdown
By US State
Top Countries (International)
Significant Earthquakes (M4.5+)
6.0
32 km SSW of Honchō, Japan
13:44 UTC · 41.0 km deep
Felt by 12
5.3
southern Mid-Atlantic Ridge
11:22 UTC · 10.0 km deep
5.2
126 km W of Lata, Solomon Islands
21:32 UTC · 10.0 km deep
5.2
66 km NE of Ruteng, Indonesia
21:20 UTC · 10.0 km deep
Felt by 3
5.2
135 km ESE of Kirakira, Solomon Islands
08:12 UTC · 128.0 km deep
5.1
231 km ESE of Attu Station, Alaska
23:20 UTC · 14.8 km deep
Felt by 1
4.9
South Sandwich Islands region
17:23 UTC · 35.0 km deep
4.7
54 km NNE of Ruteng, Indonesia
22:57 UTC · 10.0 km deep
Earthquake Map — August 23, 2026
All Earthquakes — August 23, 2026
Showing 30 of 121 (filtered from 279)
(Filtered to M2.0+. Change the magnitude filter to see smaller events.)
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
2026-08-23 2026-08-23 23:45:58 UTC | 2.6ml | 106 km SSW of Unalaska, Alaska 52.940°, -166.915° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 23, 2026 at 23:45 UTC, a magnitude 2.6 earthquake struck 106 km SSW of Unalaska, Alaska. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 23:42:31 UTC | 2.8ml | Rat Islands, Aleutian Islands, Alaska 50.813°, 178.325° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.8 seismic event took place near Rat Islands, Aleutian Islands, Alaska on August 23, 2026 at 23:42 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 23:40:06 UTC | 2.7ml | 141 km WSW of Adak, Alaska 51.589°, -178.630° | 94.9 km | - | - | - | ✓ Reviewed | USGS → |
On August 23, 2026, worldwide seismic activity registered a magnitude 2.7 earthquake 141 km WSW of Adak, Alaska at 23:40 UTC. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 23:29:41 UTC | 4.1mb | 93 km SSW of Singaparna, Indonesia -8.134°, 107.781° | 54.3 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.1 earthquake 93 km SSW of Singaparna, Indonesia at 23:29 UTC on August 23, 2026. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 23:20:35 UTC | 5.1mww | 231 km ESE of Attu Station, Alaska 52.217°, 176.431° | 14.8 km | 1 | III | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 5.1 earthquake 231 km ESE of Attu Station, Alaska at 23:20 UTC on August 23, 2026. See the M5.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 23:11:49 UTC | 4.2mb | 81 km SW of Kastrí, Greece 34.337°, 23.433° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
On August 23, 2026 at 23:11 UTC, a magnitude 4.2 earthquake struck 81 km SW of Kastrí, Greece. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 23:06:54 UTC | 2.8ml | 17 km SE of Ackerly, Texas 32.400°, -101.607° | 6.3 km | - | - | - | ✓ Reviewed | USGS → |
August 23, 2026 brought a magnitude 2.8 earthquake 17 km SE of Ackerly, Texas, logged at 23:06 UTC. 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 M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 23:05:29 UTC | 4.2mb | 42 km NW of Ruteng, Indonesia -8.300°, 120.232° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 4.2 earthquake was recorded 42 km NW of Ruteng, Indonesia on August 23, 2026 at 23:05 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.3 earthquake that occurred about 2 hours earlier. The event was offshore. See the M4.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 22:58:07 UTC | 4.1mb | 50 km WNW of San Antonio de los Cobres, Argentina -24.088°, -66.794° | 174.3 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 4.1 event was detected 50 km WNW of San Antonio de los Cobres, Argentina on August 23, 2026, with origin time 22:58 UTC. See the M4.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 22:57:30 UTC | 4.7mb | 54 km NNE of Ruteng, Indonesia -8.146°, 120.625° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 4.7 earthquake 54 km NNE of Ruteng, Indonesia came in on August 23, 2026 at 22:57 UTC. See the M4.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 22:08:58 UTC | 2.6md | 12 km S of Guánica, Puerto Rico 17.856°, -66.920° | 11.8 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.6 earthquake was recorded 12 km S of Guánica, Puerto Rico on August 23, 2026 at 22:08 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 21:39:45 UTC | 4.3mb | Fiji region -21.685°, -179.055° | 591.0 km | - | - | - | ✓ Reviewed | USGS → |
At 21:39 UTC on August 23, 2026, a magnitude 4.3 tremor occurred in the Fiji region. This deep-focus earthquake originated far below the brittle crust, deep inside the mantle. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 21:32:20 UTC | 5.2mww | 126 km W of Lata, Solomon Islands -10.698°, 164.643° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 5.2 earthquake 126 km W of Lata, Solomon Islands with origin time 21:32 UTC on August 23, 2026. The event was offshore. See the M5.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 21:32:14 UTC | 3.2ml | 25 km WSW of Adak, Alaska 51.799°, -176.981° | 80.2 km | - | - | - | ✓ Reviewed | USGS → |
On August 23, 2026 at 21:32 UTC, a magnitude 3.2 earthquake struck 25 km WSW of Adak, Alaska. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 21:27:01 UTC | 4.3mb | 31 km NNW of Ruteng, Indonesia -8.351°, 120.352° | 10.0 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.3 earthquake 31 km NNW of Ruteng, Indonesia at 21:27 UTC on August 23, 2026. See the M4.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 21:20:15 UTC | 5.2mb | 66 km NE of Ruteng, Indonesia -8.176°, 120.876° | 10.0 km | 3 | - | - | ✓ Reviewed | USGS → |
On August 23, 2026, worldwide seismic activity registered a magnitude 5.2 earthquake 66 km NE of Ruteng, Indonesia at 21:20 UTC. The event was offshore. See the M5.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 21:04:49 UTC | 2.2ml | 95 km SW of Akhiok, Alaska 56.306°, -155.203° | 29.3 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.2 seismic event took place 95 km SW of Akhiok, Alaska on August 23, 2026 at 21:04 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 20:57:06 UTC | 2.2ml | 12 km W of Forsan, Texas 32.130°, -101.500° | 6.6 km | - | - | - | ✓ Reviewed | USGS → |
August 23, 2026 brought a magnitude 2.2 earthquake 12 km W of Forsan, Texas, logged at 20:57 UTC. The event was offshore. See the M2.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 20:38:15 UTC | 4.5mb | 25 km ESE of Coihueco, Chile -36.742°, -71.589° | 100.1 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 4.5 earthquake 25 km ESE of Coihueco, Chile at 20:38 UTC on August 23, 2026. See the M4.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 20:35:11 UTC | 2.6ml | 55 km SE of Adak, Alaska 51.480°, -176.132° | 35.0 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.6 earthquake 55 km SE of Adak, Alaska with origin time 20:35 UTC on August 23, 2026. It arrived roughly 20 hours after a larger magnitude 2.7 mainshock in the same 20 km area, placing it within the typical aftershock window. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 20:33:34 UTC | 2.0ml | 70 km SE of Ugashik, Alaska 57.026°, -156.646° | 2.5 km | - | - | - | ✓ Reviewed | USGS → |
At 20:33 UTC on August 23, 2026, a magnitude 2.0 tremor occurred 70 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 M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 20:28:20 UTC | 2.4md | 5 km ENE of Sabana Grande, Puerto Rico 18.099°, -66.917° | 49.9 km | - | - | - | ✓ Reviewed | USGS → |
On August 23, 2026 at 20:28 UTC, a magnitude 2.4 earthquake struck 5 km ENE of Sabana Grande, Puerto Rico. See the M2.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 20:13:43 UTC | 3.0ml | 237 km W of Adak, Alaska 51.993°, 179.913° | 178.8 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.0 earthquake 237 km W of Adak, Alaska came in on August 23, 2026 at 20:13 UTC. The event was offshore. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 20:13:06 UTC | 2.1ml | 88 km SSE of Akutan, Alaska 53.394°, -165.267° | 16.3 km | - | - | - | ✓ Reviewed | USGS → |
August 23, 2026 brought a magnitude 2.1 earthquake 88 km SSE of Akutan, Alaska, logged at 20:13 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 19:56:47 UTC | 4.4mb | 80 km W of Sungai Penuh, Indonesia -2.072°, 100.665° | 66.2 km | - | - | - | ✓ Reviewed | USGS → |
On August 23, 2026 at 19:56 UTC, a magnitude 4.4 earthquake struck 80 km W of Sungai Penuh, Indonesia. The event was offshore. See the M4.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 19:55:04 UTC | 2.5ml | 23 km WNW of Susitna, Alaska 61.609°, -150.942° | 71.9 km | 1 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.5 earthquake 23 km WNW of Susitna, Alaska at 19:55 UTC on August 23, 2026. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 19:26:52 UTC | 2.3ml | 119 km SSW of Nikolski, Alaska 51.896°, -169.263° | 3.3 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.3 earthquake 119 km SSW of Nikolski, Alaska with origin time 19:26 UTC on August 23, 2026. Coming 1 hours after a magnitude 3.1 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. 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. | ||||||||
2026-08-23 2026-08-23 19:25:39 UTC | 2.1md | 8 km WNW of La Porte, CA 39.696°, -121.075° | 9.9 km | - | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.1 earthquake 8 km WNW of La Porte, CA came in on August 23, 2026 at 19:25 UTC. See the M2.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 19:18:21 UTC | 2.0ml | 74 km SW of Unalaska, Alaska 53.453°, -167.404° | 15.1 km | - | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.0 earthquake 74 km SW of Unalaska, Alaska at 19:18 UTC on August 23, 2026. This event falls inside the aftershock decay of a nearby magnitude 2.1 earthquake that occurred about 1 hours earlier. The event was offshore. See the M2.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-08-23 2026-08-23 18:58:19 UTC | 2.0ml | 97 km SE of Ugashik, Alaska 56.918°, -156.212° | 3.5 km | - | - | - | ✓ Reviewed | USGS → |
This magnitude 2.0 event was detected 97 km SE of Ugashik, Alaska on August 23, 2026, with origin time 18:58 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. | ||||||||
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 23, 2026. Data includes all events of magnitude 1.0 or greater. Past earthquake data is considered final after review by USGS seismologists.