M4.2 Earthquake 129 km SSE of San Pedro de Atacama, Chile — July 15, 2020
2020-07-15 19:23:20 UTC (2020-07-15) · approx. 2:23 PM UTC-5 local
On July 15, 2020 at 19:23 UTC, a magnitude 4.2 intermediate depth earthquake struck 129 km SSE of San Pedro de Atacama, Chile, at a depth of 153.1 km and coordinates -23.9897°, -67.7014°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-67.7014°E
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Common Questions
How strong was the magnitude 4.2 earthquake near San Pedro de Atacama, Chile?
The magnitude 4.2 earthquake that struck 129 km SSE of San Pedro de Atacama, Chile on July 15, 2020 at 19:23 UTC had a depth of 153.1 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 4.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000ap79). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, July 15, 2020). M4.2 Earthquake 129 km SSE of San Pedro de Atacama, Chile — July 15, 2020. Retrieved September 26, 2020 from https://www.earthquaketracker.org/earthquakes/event/us7000ap79/