M4.0 Earthquake 81 km NNE of Iquique, Chile — July 23, 2022
2022-07-23 21:42:51 UTC (2022-07-23) · approx. 4:42 PM UTC-5 local
On July 23, 2022 at 21:42 UTC, a magnitude 4.0 shallow crustal earthquake struck 81 km NNE of Iquique, Chile, at a depth of 66.1 km and coordinates -19.5305°, -69.8546°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 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
-69.8546°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.0 earthquake near Iquique, Chile?
The magnitude 4.0 earthquake that struck 81 km NNE of Iquique, Chile on July 23, 2022 at 21:42 UTC had a depth of 66.1 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 4.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000ht1a). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, July 23, 2022). M4.0 Earthquake 81 km NNE of Iquique, Chile — July 23, 2022. Retrieved October 1, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000ht1a/