Earthquakes in Anchorage, Alaska
Last earthquake: 30 minutes ago · 478 in past 30 days · Largest: M3.7 · Population 291K
Last updated: October 8, 2026 at 09:15 PM UTC · Data: USGS Earthquake Hazards Program
No significant earthquakes recorded near Anchorage recently. Last M2.5+: 1 day 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
- 478
- Last significant (M2.5+)
- 1 day ago
- 2026 total (M1.0+)
- 4135
Anchorage experienced a magnitude 3.3 earthquake 1 day ago 22 km SW of Hope, Alaska, at a depth of 22.9 km. Over the past 7 days, 88 earthquakes (M1.0+) have been recorded within 150 km.
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 478 earthquakes of magnitude 2.5 or greater in our tracker. The remaining 30 fell in the M2.5–M3.9 band. By depth: 357 shallow (<70 km), 121 intermediate (70–300 km). 225 of the epicenters were offshore. 92 events produced at least one felt report, totalling 331 citizen submissions to the USGS Did You Feel It? system. Focal depths ranged from 0.0 km to 131.6 km. 409 of the 478 solutions have been reviewed by a USGS seismologist; the remaining 69 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 |
|---|---|---|---|---|---|---|---|---|
1 day ago 2026-10-07 17:45:15 UTC | 3.3ml | 22 km SW of Hope, Alaska 60.773°, -149.933° | 22.9 km | 10 | II | - | ✓ Reviewed | USGS → |
At 17:45 UTC on October 7, 2026, a magnitude 3.3 tremor occurred 22 km SW of Hope, Alaska. The event was offshore. See the M3.3 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
1 day ago 2026-10-07 02:25:37 UTC | 2.5ml | 8 km E of Sterling, Alaska 60.543°, -150.615° | 43.5 km | - | - | - | Auto | USGS → |
The USGS recorded this magnitude 2.5 earthquake 8 km E of Sterling, Alaska at 02:25 UTC on October 7, 2026. This event falls inside the aftershock decay of a nearby magnitude 3.4 earthquake that occurred about 62 hours earlier. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2 days ago 2026-10-06 04:01:29 UTC | 3.4ml | 4 km NE of Big Lake, Alaska 61.548°, -149.903° | 32.8 km | 145 | III | - | Auto | USGS → |
Seismographs logged a magnitude 3.4 earthquake 4 km NE of Big Lake, Alaska with origin time 04:01 UTC on October 6, 2026. The event was offshore. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
3 days ago 2026-10-05 16:10:50 UTC | 2.9ml | 45 km WNW of Beluga, Alaska 61.350°, -151.817° | 92.9 km | - | - | - | Auto | USGS → |
A magnitude 2.9 seismic event took place 45 km WNW of Beluga, Alaska on October 5, 2026 at 16:10 UTC. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
4 days ago 2026-10-04 13:24:48 UTC | 2.6ml | 18 km WNW of Clam Gulch, Alaska 60.301°, -151.695° | 70.4 km | - | - | - | Auto | USGS → |
On October 4, 2026 at 13:24 UTC, a magnitude 2.6 earthquake struck 18 km WNW of Clam Gulch, Alaska. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
4 days ago 2026-10-04 12:46:30 UTC | 3.4ml | 14 km SSE of Funny River, Alaska 60.381°, -150.666° | 68.2 km | 1 | I | - | Auto | USGS → |
On October 4, 2026, Anchorage registered a magnitude 3.4 earthquake 14 km SSE of Funny River, Alaska at 12:46 UTC. See the M3.4 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
4 days ago 2026-10-04 04:31:28 UTC | 2.6ml | 9 km NE of Skwentna, Alaska 62.045°, -151.258° | 90.1 km | 1 | - | - | Auto | USGS → |
A magnitude 2.6 earthquake was recorded 9 km NE of Skwentna, Alaska on October 4, 2026 at 04:31 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
4 days ago 2026-10-04 01:58:07 UTC | 3.5ml | 32 km N of Fishhook, Alaska 62.032°, -149.233° | 18.7 km | 3 | III | - | ✓ Reviewed | USGS → |
A magnitude 3.5 earthquake was recorded 32 km N of Fishhook, Alaska on October 4, 2026 at 01:58 UTC. The event was offshore. See the M3.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-10-01 2026-10-01 10:18:48 UTC | 3.2ml | 35 km WSW of Skwentna, Alaska 61.836°, -151.996° | 115.6 km | 1 | - | - | Auto | USGS → |
The USGS recorded this magnitude 3.2 earthquake 35 km WSW of Skwentna, Alaska at 10:18 UTC on October 1, 2026. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-30 2026-09-30 08:22:22 UTC | 2.5ml | 7 km WSW of Willow, Alaska 61.731°, -150.174° | 5.0 km | 4 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.5 event was detected 7 km WSW of Willow, Alaska on September 30, 2026, with origin time 08:22 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-28 2026-09-28 21:22:37 UTC | 2.7ml | 22 km SSW of Susitna, Alaska 61.346°, -150.635° | 57.1 km | 1 | - | - | ✓ Reviewed | USGS → |
The USGS recorded this magnitude 2.7 earthquake 22 km SSW of Susitna, Alaska at 21:22 UTC on September 28, 2026. It arrived roughly 42 hours after a larger magnitude 2.9 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-28 2026-09-28 09:29:27 UTC | 2.5ml | 23 km SSW of Susitna, Alaska 61.354°, -150.684° | 52.9 km | 1 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.5 earthquake 23 km SSW of Susitna, Alaska came in on September 28, 2026 at 09:29 UTC. It arrived roughly 30 hours after a larger magnitude 2.9 mainshock in the same 20 km area, placing it within the typical aftershock window. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-28 2026-09-28 03:48:02 UTC | 2.8ml | 45 km W of Salamatof, Alaska 60.559°, -152.143° | 91.2 km | - | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.8 earthquake 45 km W of Salamatof, Alaska with origin time 03:48 UTC on September 28, 2026. The event was offshore. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-27 2026-09-27 06:41:39 UTC | 2.9ml | 16 km NW of Fishhook, Alaska 61.857°, -149.434° | 24.1 km | 1 | - | - | ✓ Reviewed | USGS → |
September 27, 2026 brought a magnitude 2.9 earthquake 16 km NW of Fishhook, Alaska, logged at 06:41 UTC. The event was offshore. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-27 2026-09-27 03:38:12 UTC | 2.9ml | 24 km WSW of Point MacKenzie, Alaska 61.297°, -150.413° | 50.1 km | 1 | - | - | ✓ Reviewed | USGS → |
On September 27, 2026 at 03:38 UTC, a magnitude 2.9 earthquake struck 24 km WSW of Point MacKenzie, Alaska. In the 72 hours after this event, the USGS recorded 5 smaller earthquakes within 20 km, consistent with an ongoing aftershock sequence rooted here. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-26 2026-09-26 05:55:46 UTC | 2.5ml | 58 km WNW of Nikiski, Alaska 60.860°, -152.311° | 111.1 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.5 seismic event took place 58 km WNW of Nikiski, Alaska on September 26, 2026 at 05:55 UTC. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-24 2026-09-24 01:27:20 UTC | 3.7ml | 14 km SSE of Susitna North, Alaska 62.040°, -149.755° | 26.3 km | 49 | III | - | ✓ Reviewed | USGS → |
On September 24, 2026 at 01:27 UTC, a magnitude 3.7 earthquake struck 14 km SSE of Susitna North, Alaska. 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 M3.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-23 2026-09-23 10:56:20 UTC | 3.2ml | 27 km ESE of Skwentna, Alaska 61.895°, -150.912° | 70.3 km | 2 | I | - | ✓ Reviewed | USGS → |
This magnitude 3.2 event was detected 27 km ESE of Skwentna, Alaska on September 23, 2026, with origin time 10:56 UTC. 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 M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-23 2026-09-23 10:50:05 UTC | 3.2ml | 21 km SSW of Susitna, Alaska 61.383°, -150.732° | 57.6 km | 2 | II | - | ✓ Reviewed | USGS → |
Reports of a magnitude 3.2 earthquake 21 km SSW of Susitna, Alaska came in on September 23, 2026 at 10:50 UTC. See the M3.2 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 21:17:48 UTC | 2.8ml | 40 km SSW of Skwentna, Alaska 61.652°, -151.660° | 101.7 km | 1 | - | - | ✓ Reviewed | USGS → |
On September 21, 2026, Anchorage registered a magnitude 2.8 earthquake 40 km SSW of Skwentna, Alaska at 21:17 UTC. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-21 2026-09-21 09:43:48 UTC | 2.6ml | 2 km W of Big Lake, Alaska 61.524°, -150.001° | 38.2 km | 1 | - | - | ✓ Reviewed | USGS → |
Seismographs logged a magnitude 2.6 earthquake 2 km W of Big Lake, Alaska with origin time 09:43 UTC on September 21, 2026. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-18 2026-09-18 02:47:13 UTC | 2.6ml | 19 km N of Cooper Landing, Alaska 60.661°, -149.792° | 26.0 km | 1 | - | - | ✓ Reviewed | USGS → |
On September 18, 2026, Anchorage registered a magnitude 2.6 earthquake 19 km N of Cooper Landing, Alaska at 02:47 UTC. The event was offshore. See the M2.6 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-17 2026-09-17 23:27:26 UTC | 2.7ml | 11 km SE of Anchorage, Alaska 61.150°, -149.748° | 12.9 km | 26 | - | - | ✓ Reviewed | USGS → |
This magnitude 2.7 event was detected 11 km SE of Anchorage, Alaska on September 17, 2026, with origin time 23:27 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-16 2026-09-16 17:41:33 UTC | 2.7ml | 43 km S of Glacier View, Alaska 61.428°, -147.498° | 19.0 km | 1 | - | - | ✓ Reviewed | USGS → |
Reports of a magnitude 2.7 earthquake 43 km S of Glacier View, Alaska came in on September 16, 2026 at 17:41 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-14 2026-09-14 05:58:03 UTC | 2.5ml | 18 km N of Moose Pass, Alaska 60.657°, -149.406° | 7.1 km | 1 | - | - | ✓ Reviewed | USGS → |
September 14, 2026 brought a magnitude 2.5 earthquake 18 km N of Moose Pass, Alaska, logged at 05:58 UTC. Coming 53 hours after a magnitude 2.7 earthquake in the immediate vicinity, it is most likely an aftershock of that larger rupture. The event was offshore. See the M2.5 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-13 2026-09-13 13:39:12 UTC | 2.8ml | 52 km WNW of Nikiski, Alaska 60.794°, -152.233° | 103.7 km | 1 | - | - | ✓ Reviewed | USGS → |
At 13:39 UTC on September 13, 2026, a magnitude 2.8 tremor occurred 52 km WNW of Nikiski, Alaska. See the M2.8 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-12 2026-09-12 00:28:57 UTC | 2.7ml | 21 km SSW of Sunrise, Alaska 60.720°, -149.627° | 24.7 km | 1 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.7 seismic event took place 21 km SSW of Sunrise, Alaska on September 12, 2026 at 00:28 UTC. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-09 2026-09-09 22:01:30 UTC | 2.7ml | 7 km SW of Cohoe, Alaska 60.328°, -151.404° | 66.4 km | 1 | - | - | ✓ Reviewed | USGS → |
September 9, 2026 brought a magnitude 2.7 earthquake 7 km SW of Cohoe, Alaska, logged at 22:01 UTC. The event was offshore. See the M2.7 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-09 2026-09-09 18:35:05 UTC | 2.9ml | 25 km ENE of Beluga, Alaska 61.247°, -150.659° | 49.6 km | 3 | - | - | ✓ Reviewed | USGS → |
A magnitude 2.9 earthquake was recorded 25 km ENE of Beluga, Alaska on September 9, 2026 at 18:35 UTC. See the M2.9 event page for the full report, ShakeMap, and citizen-reported intensity data. | ||||||||
2026-09-09 2026-09-09 07:22:20 UTC | 2.6ml | 14 km WSW of Tyonek, Alaska 61.027°, -151.390° | 77.7 km | 1 | - | - | ✓ Reviewed | USGS → |
At 07:22 UTC on September 9, 2026, a magnitude 2.6 tremor occurred 14 km WSW of Tyonek, Alaska. See the M2.6 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, 478 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?
No earthquakes of magnitude 2.5 or greater have been recorded near Anchorage in the past 24 hours. The most recent M2.5+ event was 1 day ago.
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: October 8, 2026 at 09:15 PM UTC