M4.6 Earthquake 44 km SW of Santiago, Peru — October 28, 2022
2022-10-28 19:19:10 UTC (2022-10-28) · approx. 2:19 PM UTC-5 local
On October 28, 2022 at 19:19 UTC, a magnitude 4.6 shallow crustal earthquake struck 44 km SW of Santiago, Peru, at a depth of 39.5 km and coordinates -14.5069°, -75.9568°. This earthquake was detected by 70 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.
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Earthquake Details
-75.9568°E
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Common Questions
How strong was the magnitude 4.6 earthquake near Santiago, Peru?
The magnitude 4.6 earthquake that struck 44 km SW of Santiago, Peru on October 28, 2022 at 19:19 UTC had a depth of 39.5 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -14.5069°, -75.9568°, which is 44 km SW of Santiago, 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: us7000il14). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, October 28, 2022). M4.6 Earthquake 44 km SW of Santiago, Peru — October 28, 2022. Retrieved January 3, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000il14/