Earthquakes in Anchorage, Alaska
Last earthquake: 2 hours ago · 401 in past 30 days · Largest: M4.9 · Population 291K
Last updated: July 18, 2026 at 12:21 PM UTC · Data: USGS Earthquake Hazards Program
No earthquakes M2.5+ in the past 6 hours near Anchorage. Most recent: M2.6 19 hours ago.
Quick Facts — Earthquakes in Anchorage
- Population
- 291K
- Seismic activity level
- very high
- Nearest major fault
- Castle Mountain Fault (50 km)
- Largest recorded nearby
- M9.2 (1964 Great Alaska earthquake)
- 30-year probability M6.7+
- 90% (NSHM)
- Earthquakes past 30 days
- 401
- Last significant (M2.5+)
- 19 hours ago
- 2026 total (M1.0+)
- 2942
The Anchorage area averages about 35 magnitude 4.0+ earthquakes per year and has recorded 401 earthquakes (M1.0+) within 150 km in the past 30 days. The most recent significant earthquake (M3.0+) was a magnitude 3.0 event 18 days ago 18 km SE of Chickaloon, Alaska.
Anchorage sits in the very high category for U.S. seismic activity. The largest earthquake in or near Anchorage since records began was the magnitude 9.2 1964 Great Alaska earthquake, which struck approximately 120 km east of the city.
According to the U.S. Geological Survey's National Seismic Hazard Model, there is approximately a 90% probability of a magnitude 6.7 or greater earthquake within 100 km of Anchorage in the next 30 years, and a 60% probability of a magnitude 7.0 or greater event. The largest credible earthquake predicted for the Anchorage area is a magnitude 7.5 event on the Castle Mountain Fault, which lies 50 km from downtown Anchorage. Source: USGS Alaska Earthquake Center; USGS NSHM 2023
Anchorage sits in a region characterized by Pacific Plate subduction beneath the North American Plate, producing frequent megathrust and crustal earthquakes along the Aleutian arc. Beyond the Castle Mountain Fault, secondary fault systems include the Aleutian Subduction Zone and Denali Fault. View all earthquakes in Alaska.
2026 Activity vs Historical Average
Recent Significant Earthquakes Near Anchorage
Earthquake Map — Anchorage Area
Fault Lines Near Anchorage
| Fault Name | Type | Distance | Max Credible Mag | Last Major Rupture |
|---|---|---|---|---|
| Castle Mountain Fault | right-lateral strike-slip | 50 km | M7.5 | 1984 (M5.7) |
| Aleutian Subduction Zone | subduction zone | 80 km | M9.2 | 1964 (M9.2 Great Alaska) |
| Denali Fault | right-lateral strike-slip | 200 km | M8.0 | 2002 (M7.9) |
| Border Ranges Fault | thrust | 30 km | M7.0 | paleoseismic data limited |
Recent Earthquakes (Last 30 Days)
Dataset at a glance — Anchorage
Over the past 30 days, Anchorage has recorded 401 earthquakes of magnitude 2.5 or greater in our tracker. 2 landed between M4.0 and M4.9. The remaining 38 fell in the M2.5–M3.9 band. By depth: 314 shallow (<70 km), 87 intermediate (70–300 km). 193 of the epicenters were offshore. 94 events produced at least one felt report, totalling 1,642 citizen submissions to the USGS Did You Feel It? system. Cluster detection flagged 1 aftershock sequence; the largest contained 12 smaller events within 20 km and 72 hours of its mainshock. Focal depths ranged from 0.0 km to 128.3 km. 347 of the 401 solutions have been reviewed by a USGS seismologist; the remaining 54 are automatic and may be refined.
Each row in the table below includes a narrative summary of the event, ordered by time. Use the column headers to sort or filter by magnitude.
| Time ↓ | Mag ↕ | Location ↕ | Depth ↕ | Felt ↕ | MMI | Alert | Status | Details |
|---|---|---|---|---|---|---|---|---|
19 hours ago 2026-07-17 17:04:59 UTC | 2.6ml | 4 km SSW of Tyonek, Alaska 61.035°, -151.177° | 70.2 km | 1 | - | - | Auto | USGS → |
On July 17, 2026 at 17:04 UTC, a magnitude 2.6 earthquake struck 4 km SSW of Tyonek, Alaska. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-07-15 13:28:27 UTC | 2.6ml | 21 km E of Point Possession, Alaska 60.944°, -150.297° | 58.1 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.6 earthquake was recorded 21 km E of Point Possession, Alaska on July 15, 2026 at 13:28 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
3 days ago 2026-07-15 03:45:48 UTC | 2.8ml | 17 km SSW of Petersville, Alaska 62.356°, -150.936° | 78.5 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.8 earthquake was recorded 17 km SSW of Petersville, Alaska on July 15, 2026 at 03:45 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
4 days ago 2026-07-13 23:08:20 UTC | 2.7ml | 25 km N of Fishhook, Alaska 61.972°, -149.178° | 29.2 km | 2 | - | - | Auto | USGS → |
Reports of a magnitude 2.7 earthquake 25 km N of Fishhook, Alaska came in on July 13, 2026 at 23:08 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
5 days ago 2026-07-13 00:09:01 UTC | 2.6ml | 34 km W of Kalifornsky, Alaska 60.474°, -151.905° | 90.1 km | 1 | - | - | Auto | USGS → |
Seismographs logged a magnitude 2.6 earthquake 34 km W of Kalifornsky, Alaska with origin time 00:09 UTC on July 13, 2026. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
6 days ago 2026-07-11 20:07:44 UTC | 2.5ml | 8 km E of Sutton-Alpine, Alaska 61.787°, -148.614° | 0.0 km | 2 | - | - | Auto | USGS → |
On July 11, 2026 at 20:07 UTC, a magnitude 2.5 earthquake struck 8 km E of Sutton-Alpine, Alaska. In the 72 hours after this event, the USGS recorded 7 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. | ||||||||
2026-07-09 2026-07-09 17:45:14 UTC | 2.6ml | 10 km S of Willow, Alaska 61.650°, -150.060° | 22.9 km | 2 | - | - | ✓ Reviewed | USGS → |
On July 9, 2026, Anchorage registered a magnitude 2.6 earthquake 10 km S of Willow, Alaska at 17:45 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-07-09 2026-07-09 02:14:26 UTC | 2.5ml | 44 km NW of Beluga, Alaska 61.395°, -151.714° | 88.8 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 earthquake was recorded 44 km NW of Beluga, Alaska on July 9, 2026 at 02:14 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-07-09 2026-07-09 00:15:20 UTC | 2.5ml | 12 km ENE of Willow, Alaska 61.800°, -149.823° | 27.5 km | 1 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.5 earthquake 12 km ENE of Willow, Alaska with origin time 00:15 UTC on July 9, 2026. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-07-07 2026-07-07 09:54:32 UTC | 2.5ml | 48 km NNE of Chickaloon, Alaska 62.212°, -148.156° | 5.0 km | 1 | - | - | ✓ Reviewed | USGS → |
On July 7, 2026, Anchorage registered a magnitude 2.5 earthquake 48 km NNE of Chickaloon, Alaska at 09:54 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-07-07 2026-07-07 07:06:08 UTC | 2.5ml | 35 km WSW of Trapper Creek, Alaska 62.171°, -150.837° | 67.4 km | 1 | - | - | ✓ Reviewed | USGS → |
At 07:06 UTC on July 7, 2026, a magnitude 2.5 tremor occurred 35 km WSW of Trapper Creek, Alaska. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-07-06 2026-07-06 15:49:51 UTC | 2.8ml | 24 km SE of Point Possession, Alaska 60.763°, -150.376° | 46.7 km | 1 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.8 earthquake 24 km SE of Point Possession, Alaska with origin time 15:49 UTC on July 6, 2026. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-07-06 2026-07-06 15:36:40 UTC | 2.8ml | 39 km SSW of Skwentna, Alaska 61.658°, -151.652° | 101.6 km | 1 | - | - | ✓ Reviewed | USGS → |
On July 6, 2026, Anchorage registered a magnitude 2.8 earthquake 39 km SSW of Skwentna, Alaska at 15:36 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-07-06 2026-07-06 10:48:14 UTC | 2.9ml | 29 km W of Nikiski, Alaska 60.738°, -151.814° | 90.0 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 seismic event took place 29 km W of Nikiski, Alaska on July 6, 2026 at 10:48 UTC. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-07-05 2026-07-05 04:00:31 UTC | 2.9ml | 19 km SSE of Susitna, Alaska 61.381°, -150.356° | 27.3 km | 5 | - | - | ✓ Reviewed | USGS → |
July 5, 2026 brought a magnitude 2.9 earthquake 19 km SSE of Susitna, Alaska, logged at 04:00 UTC. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-07-04 2026-07-04 16:50:29 UTC | 2.5ml | 28 km ENE of Point Possession, Alaska 60.974°, -150.177° | 47.0 km | 1 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.5 earthquake 28 km ENE of Point Possession, Alaska at 16:50 UTC on July 4, 2026. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-07-01 2026-07-01 20:08:20 UTC | 2.6ml | 4 km E of Chase, Alaska 62.446°, -150.007° | 65.7 km | 1 | - | - | ✓ Reviewed | USGS → |
At 20:08 UTC on July 1, 2026, a magnitude 2.6 tremor occurred 4 km E of Chase, Alaska. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-06-30 2026-06-30 23:15:11 UTC | 2.8ml | 18 km N of Sterling, Alaska 60.701°, -150.807° | 50.6 km | 1 | - | - | ✓ Reviewed | USGS → |
At 23:15 UTC on June 30, 2026, a magnitude 2.8 tremor occurred 18 km N of Sterling, Alaska. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-06-30 2026-06-30 08:43:20 UTC | 2.8ml | 45 km NNE of Chickaloon, Alaska 62.181°, -148.152° | 10.0 km | 3 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.8 earthquake 45 km NNE of Chickaloon, Alaska at 08:43 UTC on June 30, 2026. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-06-30 2026-06-30 05:40:20 UTC | 2.8ml | 14 km ESE of Eagle River, Alaska 61.280°, -149.321° | 22.5 km | 55 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.8 event was detected 14 km ESE of Eagle River, Alaska on June 30, 2026, with origin time 05:40 UTC. This event falls inside the aftershock decay of a nearby magnitude 3.1 earthquake that occurred about 19 hours earlier. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-06-29 2026-06-29 22:39:50 UTC | 3.0ml | 18 km SE of Chickaloon, Alaska 61.667°, -148.230° | 13.4 km | 5 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.0 earthquake 18 km SE of Chickaloon, Alaska came in on June 29, 2026 at 22:39 UTC. The event was offshore. See the M3.0 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-06-29 2026-06-29 10:19:31 UTC | 3.1ml | 4 km SSE of Elmendorf Air Force Base, Alaska 61.215°, -149.608° | 26.5 km | 23 | II | - | ✓ Reviewed | USGS → |
At 10:19 UTC on June 29, 2026, a magnitude 3.1 tremor occurred 4 km SSE of Elmendorf Air Force Base, Alaska. See the M3.1 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-06-29 2026-06-29 09:51:42 UTC | 2.5ml | 5 km SSE of Elmendorf Air Force Base, Alaska 61.212°, -149.606° | 32.7 km | 2 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.5 event was detected 5 km SSE of Elmendorf Air Force Base, Alaska on June 29, 2026, with origin time 09:51 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-06-29 2026-06-29 05:03:33 UTC | 2.6ml | 22 km NNE of Sterling, Alaska 60.714°, -150.580° | 54.1 km | 2 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.6 earthquake 22 km NNE of Sterling, Alaska at 05:03 UTC on June 29, 2026. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-06-29 2026-06-29 01:27:10 UTC | 2.6ml | 9 km ESE of Clam Gulch, Alaska 60.207°, -151.238° | 58.1 km | 1 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.6 event was detected 9 km ESE of Clam Gulch, Alaska on June 29, 2026, with origin time 01:27 UTC. Coming 48 hours after a magnitude 4.9 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-06-28 2026-06-28 19:23:54 UTC | 2.7ml | 35 km NW of Willow, Alaska 61.975°, -150.519° | 45.9 km | - | - | - | ✓ Reviewed | USGS → |
A magnitude 2.7 seismic event took place 35 km NW of Willow, Alaska on June 28, 2026 at 19:23 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-06-28 2026-06-28 06:11:26 UTC | 2.6ml | 32 km W of Salamatof, Alaska 60.642°, -151.906° | 97.6 km | 1 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.6 earthquake 32 km W of Salamatof, Alaska came in on June 28, 2026 at 06:11 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-06-28 2026-06-28 03:19:36 UTC | 2.6ml | 11 km S of Clam Gulch, Alaska 60.132°, -151.367° | 53.6 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.6 seismic event took place 11 km S of Clam Gulch, Alaska on June 28, 2026 at 03:19 UTC. This event falls inside the aftershock decay of a nearby magnitude 4.9 earthquake that occurred about 26 hours earlier. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-06-27 2026-06-27 20:31:56 UTC | 3.2ml | 60 km SSW of Skwentna, Alaska 61.532°, -152.025° | 110.9 km | 1 | - | - | ✓ Reviewed | USGS → |
On June 27, 2026, Anchorage registered a magnitude 3.2 earthquake 60 km SSW of Skwentna, Alaska at 20:31 UTC. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-06-27 2026-06-27 05:31:50 UTC | 2.5ml | 55 km NW of Tatitlek, Alaska 61.209°, -147.429° | 16.6 km | 2 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.5 earthquake 55 km NW of Tatitlek, Alaska came in on June 27, 2026 at 05:31 UTC. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
Common Questions About Earthquakes in Anchorage
How often do earthquakes happen in Anchorage?
Anchorage experiences frequent earthquake activity. The area averages 250 earthquakes of magnitude 3.0 or greater per year, with 4 reaching magnitude 5.0 or higher. In the past 30 days, 401 earthquakes (M1.0+) have been recorded within 150 km of the city.
What was the biggest earthquake to hit Anchorage?
The largest earthquake in or near Anchorage since records began was the magnitude 9.2 1964 Great Alaska earthquake in 1964, which struck approximately 120 km east of the city.
What is the earthquake risk in Anchorage?
Earthquakes cannot be predicted with precision. However, the U.S. Geological Survey estimates there is approximately a 90% probability of a magnitude 6.7 or greater earthquake within 100 km of Anchorage in the next 30 years. The most likely source is the Castle Mountain Fault, which has a maximum credible magnitude of 7.5.
What fault lines are near Anchorage?
The Castle Mountain Fault runs approximately 50 km from Anchorage and is the most significant local seismic threat, with a maximum credible magnitude of 7.5. Other nearby faults include the Aleutian Subduction Zone (80 km), the Denali Fault (200 km), the Border Ranges Fault (30 km).
Was there an earthquake in Anchorage today?
Yes — a magnitude 2.6 earthquake was recorded 19 hours ago 4 km SSW of Tyonek, Alaska, within 150 km of Anchorage.
About This Page
This page is maintained by Earthquake Tracker, an independent seismic activity reporting service. Earthquake data is sourced from the U.S. Geological Survey (USGS) Earthquake Hazards Program and updated every hour. Probability estimates use the USGS National Seismic Hazard Model (NSHM 2023). Historical earthquake data is sourced from the USGS Historical Earthquake Catalog. Fault information comes from the USGS Quaternary Fault and Fold Database and SCEC Community Fault Model.
Last data refresh: July 18, 2026 at 12:21 PM UTC