M4.4 Earthquake 46 km ENE of Tocopilla, Chile — October 28, 2023
2023-10-28 19:17:37 UTC (2023-10-28) · approx. 2:17 PM UTC-5 local
On October 28, 2023 at 19:17 UTC, a magnitude 4.4 intermediate depth earthquake struck 46 km ENE of Tocopilla, Chile, at a depth of 70.6 km and coordinates -21.9073°, -69.7922°.
Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 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 1 citizen response 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
-69.7922°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.4 earthquake near Tocopilla, Chile?
The magnitude 4.4 earthquake that struck 46 km ENE of Tocopilla, Chile on October 28, 2023 at 19:17 UTC had a depth of 70.6 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 4.4 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000l78j). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, October 28, 2023). M4.4 Earthquake 46 km ENE of Tocopilla, Chile — October 28, 2023. Retrieved January 4, 2024 from https://www.earthquaketracker.org/earthquakes/event/us7000l78j/