M4.6 Earthquake 49 km NE of Yigo Village, Guam — October 22, 2026
2026-10-22 08:06:35 UTC (3 hours ago) · approx. 6:06 PM UTC+10 local
Felt by 9 people across nearby locations. Aftershock of the M5.3 mainshock.
On October 22, 2026 at 08:06 UTC, a magnitude 4.6 intermediate depth earthquake struck 49 km NE of Yigo Village, Guam, at a depth of 99.2 km and coordinates 13.8474°, 145.2184°. This earthquake was detected by 39 seismic stations with good location accuracy and was assigned a USGS significance rating of 329, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 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 5.3 mainshock that occurred 12 days ago 41 km NNE of Yigo Village, Guam. 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.
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 9 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
145.2184°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.6 earthquake near Yigo Village, Guam?
The magnitude 4.6 earthquake that struck 49 km NE of Yigo Village, Guam on October 22, 2026 at 08:06 UTC had a depth of 99.2 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 13.8474°, 145.2184°, which is 49 km NE of Yigo Village, Guam.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 earthquakes can continue for several days and gradually diminish over time.
Is this the same earthquake as the M5.3 one earlier?
No. This magnitude 4.6 earthquake is an aftershock of the larger magnitude 5.3 mainshock that occurred earlier 41 km NNE of Yigo Village, Guam. Aftershocks are smaller earthquakes triggered by stress changes from the mainshock.
Actions
Authoritative source: USGS event page (event ID: us6000u41z). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2026, October 22, 2026). M4.6 Earthquake 49 km NE of Yigo Village, Guam — October 22, 2026. Retrieved October 22, 2026 from https://www.earthquaketracker.org/earthquakes/event/us6000u41z/