M4.3 Earthquake 48 km WSW of San Juan, Peru — September 22, 2022
2022-09-22 17:39:31 UTC (2022-09-22) · approx. 12:39 PM UTC-5 local
On September 22, 2022 at 17:39 UTC, a magnitude 4.3 shallow crustal earthquake struck 48 km WSW of San Juan, Peru, at a depth of 10.0 km and coordinates -15.6036°, -75.5366°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
-75.5366°E
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Common Questions
How strong was the magnitude 4.3 earthquake near San Juan, Peru?
The magnitude 4.3 earthquake that struck 48 km WSW of San Juan, Peru on September 22, 2022 at 17:39 UTC had a depth of 10.0 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000ia99). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, September 22, 2022). M4.3 Earthquake 48 km WSW of San Juan, Peru — September 22, 2022. Retrieved November 26, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000ia99/