4.4

M4.4 Earthquake 7 km SW of Santa María Zapotitlán, Mexico — November 16, 2020

2020-11-16 20:58:21 UTC (2020-11-16) · approx. 2:58 PM UTC-6 local

MagnitudeM4.4(mb)
Time20:58 UTC≈ 2:58 PM UTC-6
Depth38.8 kmshallow crustal
Coordinates16.085°, -95.908°
Felt byNo felt reports
Status✓ Reviewed by USGS

On November 16, 2020 at 20:58 UTC, a magnitude 4.4 shallow crustal earthquake struck 7 km SW of Santa María Zapotitlán, Mexico, at a depth of 38.8 km and coordinates 16.0854°, -95.9076°.

Physical scale: An earthquake of magnitude 4.4 releases seismic energy equivalent to roughly 60 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 655 m — a useful intuition for the size of the slip patch on the fault.

Map showing earthquake epicenter at 16.09°, -95.91°

Earthquake Details

Magnitude
4.4 mb
Depth
38.8 km
shallow crustal
Location
16.0854°N
-95.9076°E

Technical Information

Event ID
us7000cmr2
Event Type
earthquake
Status
✓ Reviewed
Significance
298
Azimuthal Gap
101.0°
Min Station Distance
0.369°
RMS Residual
0.86 sec
Last Updated
2021-01-27 17:30:40 UTC

Common Questions

How strong was the magnitude 4.4 earthquake near Santa María Zapotitlán, Mexico?

The magnitude 4.4 earthquake that struck 7 km SW of Santa María Zapotitlán, Mexico on November 16, 2020 at 20:58 UTC had a depth of 38.8 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 4.4 earthquakes can continue for several days and gradually diminish over time.

Understanding This Data

Magnitude 4.4 earthquakes are often felt but rarely cause damage.

Learn more about magnitude →

Authoritative source: USGS event page (event ID: us7000cmr2). All scientific values on this page are sourced verbatim from the USGS feed.

Cite this page: EarthquakeTracker.org. (2020, November 16, 2020). M4.4 Earthquake 7 km SW of Santa María Zapotitlán, Mexico — November 16, 2020. Retrieved January 27, 2021 from https://www.earthquaketracker.org/earthquakes/event/us7000cmr2/