M4.9 Earthquake 45 km N of Yigo Village, Guam — December 17, 2020
2020-12-17 18:04:55 UTC (2020-12-17) · approx. 4:04 AM UTC+10 local
Felt by 10 people across nearby locations.
On December 17, 2020 at 18:04 UTC, a magnitude 4.9 intermediate depth earthquake struck 45 km N of Yigo Village, Guam, at a depth of 119.7 km and coordinates 13.9478°, 144.9388°.
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.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 10 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
144.9388°E
Technical Information
Common Questions
How strong was the magnitude 4.9 earthquake near Yigo Village, Guam?
The magnitude 4.9 earthquake that struck 45 km N of Yigo Village, Guam on December 17, 2020 at 18:04 UTC had a depth of 119.7 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 13.9478°, 144.9388°, which is 45 km N of Yigo Village, Guam.
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.
Actions
Authoritative source: USGS event page (event ID: us7000crw9). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, December 17, 2020). M4.9 Earthquake 45 km N of Yigo Village, Guam — December 17, 2020. Retrieved December 22, 2025 from https://www.earthquaketracker.org/earthquakes/event/us7000crw9/