M4.3 Earthquake 55 km W of Talcahuano, Chile — May 23, 2023
2023-05-23 22:57:32 UTC (2023-05-23) · approx. 5:57 PM UTC-5 local
On May 23, 2023 at 22:57 UTC, a magnitude 4.3 shallow crustal earthquake struck 55 km W of Talcahuano, Chile, at a depth of 16.5 km and coordinates -36.7930°, -73.7335°.
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.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 2 citizen responses 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
-73.7335°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.3 earthquake near Talcahuano, Chile?
The magnitude 4.3 earthquake that struck 55 km W of Talcahuano, Chile on May 23, 2023 at 22:57 UTC had a depth of 16.5 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: us7000k3ck). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, May 23, 2023). M4.3 Earthquake 55 km W of Talcahuano, Chile — May 23, 2023. Retrieved July 29, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000k3ck/