M4.3 Earthquake 97 km S of San Francisco del Mar Viejo, Mexico — December 26, 2021
2021-12-26 21:33:39 UTC (2021-12-26) · approx. 3:33 PM UTC-6 local
On December 26, 2021 at 21:33 UTC, a magnitude 4.3 shallow crustal earthquake struck 97 km S of San Francisco del Mar Viejo, Mexico, at a depth of 35.0 km and coordinates 15.3603°, -94.7325°.
Physical scale: An earthquake of magnitude 4.3 releases seismic energy equivalent to roughly 43 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 558 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
-94.7325°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.3 earthquake near San Francisco del Mar Viejo, Mexico?
The magnitude 4.3 earthquake that struck 97 km S of San Francisco del Mar Viejo, Mexico on December 26, 2021 at 21:33 UTC had a depth of 35.0 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 4.3 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.3 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000gfil). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, December 26, 2021). M4.3 Earthquake 97 km S of San Francisco del Mar Viejo, Mexico — December 26, 2021. Retrieved March 5, 2022 from https://www.earthquaketracker.org/earthquakes/event/us6000gfil/