M4.5 Earthquake 8 km W of Chignayhua, Peru — May 12, 2023
2023-05-12 17:29:47 UTC (2023-05-12) · approx. 12:29 PM UTC-5 local
On May 12, 2023 at 17:29 UTC, a magnitude 4.5 shallow crustal earthquake struck 8 km W of Chignayhua, Peru, at a depth of 11.0 km and coordinates -14.2370°, -71.5182°. This earthquake was detected by 72 seismic stations with good location accuracy and was assigned a USGS significance rating of 312, placing it among routine seismic activity.
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.
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
Earthquake Details
-71.5182°E
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Common Questions
How strong was the magnitude 4.5 earthquake near Chignayhua, Peru?
The magnitude 4.5 earthquake that struck 8 km W of Chignayhua, Peru on May 12, 2023 at 17:29 UTC had a depth of 11.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -14.2370°, -71.5182°, which is 8 km W of Chignayhua, Peru. View all earthquakes in Peru.
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.
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 4.5 event is significantly smaller than that historical record.
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Location
Authoritative source: USGS event page (event ID: us6000kcjr). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, May 12, 2023). M4.5 Earthquake 8 km W of Chignayhua, Peru — May 12, 2023. Retrieved July 22, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000kcjr/