M4.9 Earthquake 12 km SSW of Santiago Quiavicuzas, Mexico — April 21, 2026
2026-04-21 14:52:16 UTC (2026-04-21) · approx. 8:52 AM UTC-6 local
Felt by 4 people across nearby locations.
On April 21, 2026 at 14:52 UTC, a magnitude 4.9 intermediate depth earthquake struck 12 km SSW of Santiago Quiavicuzas, Mexico, at a depth of 73.1 km and coordinates 16.7579°, -95.7673°. This earthquake was detected by 197 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 371, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — 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
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 4 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
-95.7673°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.9 earthquake near Santiago Quiavicuzas, Mexico?
The magnitude 4.9 earthquake that struck 12 km SSW of Santiago Quiavicuzas, Mexico on April 21, 2026 at 14:52 UTC had a depth of 73.1 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 16.7579°, -95.7673°, which is 12 km SSW of Santiago Quiavicuzas, Mexico. View all earthquakes in Mexico.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 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 4.9 event is significantly smaller than that historical record.
What should I do after an earthquake?
If you were in the affected area: check yourself and others for injuries, inspect your home for damage, and be prepared for aftershocks. For detailed guidance, see our earthquake safety guide and emergency planning resources.
Authoritative source: USGS event page (event ID: us6000sru5). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, April 21, 2026). M4.9 Earthquake 12 km SSW of Santiago Quiavicuzas, Mexico — April 21, 2026. Retrieved June 27, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000sru5/