M4.3 Earthquake 15 km WNW of False Pass, Alaska — October 18, 2024
2024-10-18 19:59:41 UTC (2024-10-18) · approx. 8:59 AM UTC-11 local
On October 18, 2024 at 19:59 UTC, a magnitude 4.3 intermediate depth earthquake struck 15 km WNW of False Pass, Alaska, at a depth of 95.1 km and coordinates 54.9229°, -163.6186°.
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
-163.6186°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.3 earthquake near False Pass, Alaska?
The magnitude 4.3 earthquake that struck 15 km WNW of False Pass, Alaska on October 18, 2024 at 19:59 UTC had a depth of 95.1 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.
Actions
Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000nzlx). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, October 18, 2024). M4.3 Earthquake 15 km WNW of False Pass, Alaska — October 18, 2024. Retrieved December 26, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000nzlx/