M4.2 Earthquake 17 km SSW of San Fernando, Peru — January 30, 2024
2024-01-30 17:43:18 UTC (2024-01-30) · approx. 12:43 PM UTC-5 local
On January 30, 2024 at 17:43 UTC, a magnitude 4.2 intermediate depth earthquake struck 17 km SSW of San Fernando, Peru, at a depth of 128.3 km and coordinates -8.5520°, -74.5849°.
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.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.6 mainshock that occurred 18 days ago 13 km ENE of San Fernando, Peru. Since the mainshock, the USGS has recorded 0 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Earthquake Details
-74.5849°E
Technical Information
Common Questions
How strong was the magnitude 4.2 earthquake near San Fernando, Peru?
The magnitude 4.2 earthquake that struck 17 km SSW of San Fernando, Peru on January 30, 2024 at 17:43 UTC had a depth of 128.3 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.
Is this the same earthquake as the M5.6 one earlier?
No. This magnitude 4.2 earthquake is an aftershock of the larger magnitude 5.6 mainshock that occurred earlier 13 km ENE of San Fernando, Peru. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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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: us7000lwft). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, January 30, 2024). M4.2 Earthquake 17 km SSW of San Fernando, Peru — January 30, 2024. Retrieved April 13, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000lwft/