M3.2 Earthquake 55 km E of Juneau, Alaska — August 18, 2022
2022-08-18 21:48:22 UTC (2022-08-18) · approx. 12:48 PM UTC-9 local
On August 18, 2022 at 21:48 UTC, a magnitude 3.2 shallow crustal earthquake struck 55 km E of Juneau, Alaska, at a depth of 1.0 km and coordinates 58.3388°, -133.4817°.
Physical scale: An earthquake of magnitude 3.2 releases seismic energy equivalent to roughly 951 kg of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 97 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-133.4817°E
Technical Information
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Common Questions
How strong was the magnitude 3.2 earthquake near Juneau, Alaska?
The magnitude 3.2 earthquake that struck 55 km E of Juneau, Alaska on August 18, 2022 at 21:48 UTC had a depth of 1.0 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 3.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 3.2 earthquakes are typically only recorded by instruments.
Authoritative source: USGS event page (event ID: us6000ibz0). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, August 18, 2022). M3.2 Earthquake 55 km E of Juneau, Alaska — August 18, 2022. Retrieved October 28, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000ibz0/