M4.4 Earthquake 71 km SW of Champerico, Guatemala — December 21, 2020
2020-12-21 16:28:50 UTC (2020-12-21) · approx. 10:28 AM UTC-6 local
On December 21, 2020 at 16:28 UTC, a magnitude 4.4 shallow crustal earthquake struck 71 km SW of Champerico, Guatemala, at a depth of 7.4 km and coordinates 13.8253°, -92.3632°.
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.
This earthquake is part of an ongoing aftershock sequence following the magnitude 5.0 mainshock that occurred 18 days ago 71 km SSW of Ocós, Guatemala. Since the mainshock, the USGS has recorded 1 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
Earthquake Details
-92.3632°E
Technical Information
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Common Questions
How strong was the magnitude 4.4 earthquake near Champerico, Guatemala?
The magnitude 4.4 earthquake that struck 71 km SW of Champerico, Guatemala on December 21, 2020 at 16:28 UTC had a depth of 7.4 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.
Is this the same earthquake as the M5.0 one earlier?
No. This magnitude 4.4 earthquake is an aftershock of the larger magnitude 5.0 mainshock that occurred earlier 71 km SSW of Ocós, Guatemala. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
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Understanding This Data
Magnitude 4.4 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000d5fe). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, December 21, 2020). M4.4 Earthquake 71 km SW of Champerico, Guatemala — December 21, 2020. Retrieved February 27, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000d5fe/