M3.5 Earthquake 69 km NNE of White Mountain, Alaska — August 11, 2020
2020-08-11 20:23:17 UTC (2020-08-11) · approx. 9:23 AM UTC-11 local
On August 11, 2020 at 20:23 UTC, a magnitude 3.5 shallow crustal earthquake struck 69 km NNE of White Mountain, Alaska, at a depth of 4.6 km and coordinates 65.2804°, -163.0091°.
Physical scale: An earthquake of magnitude 3.5 releases seismic energy equivalent to roughly 2.7 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 157 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
-163.0091°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 3.5 earthquake near White Mountain, Alaska?
The magnitude 3.5 earthquake that struck 69 km NNE of White Mountain, Alaska on August 11, 2020 at 20:23 UTC had a depth of 4.6 km. For context, this was a minor earthquake typically detected only by instruments.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.5 earthquakes can continue for several days and gradually diminish over time.
Actions
Understanding This Data
Magnitude 3.5 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: ak020aasfdjw). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, August 11, 2020). M3.5 Earthquake 69 km NNE of White Mountain, Alaska — August 11, 2020. Retrieved October 21, 2020 from https://www.earthquaketracker.org/earthquakes/event/ak020aasfdjw/