M4.6 Earthquake 10 km SE of Quilca, Peru — July 28, 2022
2022-07-28 19:34:42 UTC (2022-07-28) · approx. 2:34 PM UTC-5 local
Felt by 1 person across nearby locations.
On July 28, 2022 at 19:34 UTC, a magnitude 4.6 intermediate depth earthquake struck 10 km SE of Quilca, Peru, at a depth of 72.3 km and coordinates -16.7885°, -72.3682°. This earthquake was detected by 40 seismic stations with good location accuracy and was assigned a USGS significance rating of 326, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 m — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Peru, a region characterized by the northern Peru-Chile subduction zone, complicated by the subduction of the Nazca Ridge. The nearest mapped fault system is the Peru-Chile Trench. View all earthquakes in Peru.
Learn more: Magnitude scale · Aftershock sequences
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 1 citizen response 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
-72.3682°E
Technical Information
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Common Questions
How strong was the magnitude 4.6 earthquake near Quilca, Peru?
The magnitude 4.6 earthquake that struck 10 km SE of Quilca, Peru on July 28, 2022 at 19:34 UTC had a depth of 72.3 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -16.7885°, -72.3682°, which is 10 km SE of Quilca, Peru. View all earthquakes in Peru.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 earthquakes can continue for several days and gradually diminish over time.
Has Peru had earthquakes this big before?
The largest recorded earthquake in Peru was the M8.0 Arequipa earthquake of June 23, 2001. Today's magnitude 4.6 event is significantly smaller than that historical record.
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Location
Authoritative source: USGS event page (event ID: us6000i69t). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, July 28, 2022). M4.6 Earthquake 10 km SE of Quilca, Peru — July 28, 2022. Retrieved October 1, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000i69t/