M4.5 Earthquake 287 km W of Weno, Micronesia — August 20, 2020
2020-08-20 23:45:54 UTC (2020-08-20) · approx. 9:45 AM UTC+10 local
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On August 20, 2020 at 23:45 UTC, a magnitude 4.5 shallow crustal earthquake struck 287 km W of Weno, Micronesia, at a depth of 10.0 km and coordinates 7.3147°, 149.2381°.
Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 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
149.2381°E
Technical Information
Common Questions
How strong was the magnitude 4.5 earthquake near Weno, Micronesia?
The magnitude 4.5 earthquake that struck 287 km W of Weno, Micronesia on August 20, 2020 at 23:45 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 7.3147°, 149.2381°, which is 287 km W of Weno, Micronesia.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000bdmc). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, August 20, 2020). M4.5 Earthquake 287 km W of Weno, Micronesia — August 20, 2020. Retrieved March 10, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000bdmc/