M5.1 Earthquake 107 km E of Yigo Village, Guam — September 29, 2020
2020-09-29 01:03:53 UTC (2020-09-29) · approx. 11:03 AM UTC+10 local
Felt by 1 person across nearby locations. Aftershock of the M5.3 mainshock.
On September 29, 2020 at 01:03 UTC, a magnitude 5.1 shallow crustal earthquake struck 107 km E of Yigo Village, Guam, at a depth of 10.0 km and coordinates 13.4292°, 145.8800°.
Physical scale: An earthquake of magnitude 5.1 releases seismic energy equivalent to roughly 674 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 2.0 km — 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 5.3 mainshock that occurred 17 days ago 120 km ESE of Yigo Village, Guam. Since the mainshock, the USGS has recorded 0 aftershocks in this area. Aftershock activity is expected to continue for days to weeks as stresses on surrounding faults redistribute.
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
145.8800°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 5.1 earthquake near Yigo Village, Guam?
The magnitude 5.1 earthquake that struck 107 km E of Yigo Village, Guam on September 29, 2020 at 01:03 UTC had a depth of 10.0 km. For context, this was a moderate earthquake that could be widely felt.
Where did the earthquake occur?
The earthquake epicenter was located at 13.4292°, 145.8800°, which is 107 km E of Yigo Village, Guam.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.1 earthquakes can continue for days to weeks and gradually diminish over time.
Is this the same earthquake as the M5.3 one earlier?
No. This magnitude 5.1 earthquake is an aftershock of the larger magnitude 5.3 mainshock that occurred earlier 120 km ESE of Yigo Village, Guam. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
Actions
Authoritative source: USGS event page (event ID: us6000c2cv). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2020, September 29, 2020). M5.1 Earthquake 107 km E of Yigo Village, Guam — September 29, 2020. Retrieved December 22, 2025 from https://www.earthquaketracker.org/earthquakes/event/us6000c2cv/