M4.3 Earthquake south of Alaska — July 15, 2026
2026-07-15 17:46:18 UTC (23 hours ago) · approx. 7:46 AM UTC-10 local
On July 15, 2026 at 17:46 UTC, a magnitude 4.3 shallow crustal earthquake struck south of Alaska, at a depth of 25.5 km and coordinates 54.1865°, -153.2157°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
ShakeMap — predicted shaking intensity
Modeled ground-motion intensity contoured on the Modified Mercalli scale (MMI). Computed by the USGS from the moment-tensor solution and regional ground-motion prediction equations.
Source: U.S. Geological Survey ShakeMap. View interactive ShakeMap on USGS
Earthquake Details
-153.2157°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.3 earthquake south of Alaska?
The magnitude 4.3 earthquake that struck south of Alaska on July 15, 2026 at 17:46 UTC had a depth of 25.5 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000t0r4). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, July 15, 2026). M4.3 Earthquake south of Alaska — July 15, 2026. Retrieved July 16, 2026 from https://www.earthquaketracker.org/earthquakes/event/us7000t0r4/