M4.5 Earthquake 1 km SW of Tiltepec, Mexico — April 18, 2021
2021-04-18 22:47:28 UTC (2021-04-18) · approx. 4:47 PM UTC-6 local
On April 18, 2021 at 22:47 UTC, a magnitude 4.5 intermediate depth earthquake struck 1 km SW of Tiltepec, Mexico, at a depth of 129.7 km and coordinates 16.3827°, -93.8776°.
Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 m — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Mexico, a region characterized by the Middle America Trench, where the Cocos Plate subducts beneath the North American Plate. The nearest mapped fault system is the Middle America Trench. View all earthquakes in Mexico.
Learn more: Magnitude scale · Aftershock sequences
Earthquake Details
-93.8776°E
Technical Information
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Common Questions
How strong was the magnitude 4.5 earthquake near Tiltepec, Mexico?
The magnitude 4.5 earthquake that struck 1 km SW of Tiltepec, Mexico on April 18, 2021 at 22:47 UTC had a depth of 129.7 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 16.3827°, -93.8776°, which is 1 km SW of Tiltepec, Mexico. View all earthquakes in Mexico.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 earthquakes can continue for several days and gradually diminish over time.
Has Mexico had earthquakes this big before?
The largest recorded earthquake in Mexico was the M8.1 Chiapas earthquake of September 8, 2017. Today's magnitude 4.5 event is significantly smaller than that historical record.
Authoritative source: USGS event page (event ID: us6000e2r6). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, April 18, 2021). M4.5 Earthquake 1 km SW of Tiltepec, Mexico — April 18, 2021. Retrieved July 3, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000e2r6/