M5.3 Earthquake 21 km S of Machalí, Chile — August 18, 2022
2022-08-18 02:10:22 UTC (2022-08-18) · approx. 9:10 PM UTC-5 local
Felt by 157 people across surrounding communities.
On August 18, 2022 at 02:10 UTC, a magnitude 5.3 intermediate depth earthquake struck 21 km S of Machalí, Chile, at a depth of 107.0 km and coordinates -34.3680°, -70.6102°. This earthquake was detected by 125 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 500, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 5.3 releases seismic energy equivalent to roughly 1 kilotons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 2.7 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Chile, a region characterized by the Peru-Chile Trench, where the Nazca Plate subducts beneath South America at 65-80 mm per year. The nearest mapped fault system is the Peru-Chile Trench. View all earthquakes in Chile.
Learn more: Magnitude scale · Aftershock sequences
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 157 citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Earthquake Details
-70.6102°E
Technical Information
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Common Questions
How strong was the magnitude 5.3 earthquake near Machalí, Chile?
The magnitude 5.3 earthquake that struck 21 km S of Machalí, Chile on August 18, 2022 at 02:10 UTC had a depth of 107.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at -34.3680°, -70.6102°, which is 21 km S of Machalí, Chile. View all earthquakes in Chile.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.3 earthquakes can continue for days to weeks and gradually diminish over time.
Has Chile had earthquakes this big before?
The largest recorded earthquake in Chile was the M9.5 Great Chilean earthquake of May 22, 1960. Today's magnitude 5.3 event is significantly smaller than that historical record.
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Location
Authoritative source: USGS event page (event ID: us6000ibrs). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, August 18, 2022). M5.3 Earthquake 21 km S of Machalí, Chile — August 18, 2022. Retrieved October 28, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000ibrs/