M4.7 Earthquake 23 km NE of Tomé, Chile — March 26, 2023
2023-03-26 17:26:41 UTC (2023-03-26) · approx. 12:26 PM UTC-5 local
Felt by 8 people across nearby locations.
On March 26, 2023 at 17:26 UTC, a magnitude 4.7 shallow crustal earthquake struck 23 km NE of Tomé, Chile, at a depth of 45.2 km and coordinates -36.4913°, -72.7481°. This earthquake was detected by 137 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 344, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.7 releases seismic energy equivalent to roughly 169 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.1 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Chile, a region characterized by the Peru-Chile Trench, where the Nazca Plate subducts beneath South America at 65-80 mm per year. The nearest mapped fault system is the Peru-Chile Trench. View all earthquakes in Chile.
Learn more: Magnitude scale · Aftershock sequences
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 8 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
-72.7481°E
Technical Information
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Common Questions
How strong was the magnitude 4.7 earthquake near Tomé, Chile?
The magnitude 4.7 earthquake that struck 23 km NE of Tomé, Chile on March 26, 2023 at 17:26 UTC had a depth of 45.2 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at -36.4913°, -72.7481°, which is 23 km NE of Tomé, Chile. View all earthquakes in Chile.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.7 earthquakes can continue for several days and gradually diminish over time.
Has Chile had earthquakes this big before?
The largest recorded earthquake in Chile was the M9.5 Great Chilean earthquake of May 22, 1960. Today's magnitude 4.7 event is significantly smaller than that historical record.
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Location
Authoritative source: USGS event page (event ID: us7000jmw0). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, March 26, 2023). M4.7 Earthquake 23 km NE of Tomé, Chile — March 26, 2023. Retrieved June 3, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000jmw0/