M5.0 Earthquake 44 km NE of Colonia, Micronesia — October 28, 2021
2021-10-28 23:35:01 UTC (2021-10-28) · approx. 8:35 AM UTC+9 local
Felt by 3 people across nearby locations.
On October 28, 2021 at 23:35 UTC, a magnitude 5.0 shallow crustal earthquake struck 44 km NE of Colonia, Micronesia, at a depth of 10.0 km and coordinates 9.7975°, 138.4111°.
Physical scale: An earthquake of magnitude 5.0 releases seismic energy equivalent to roughly 477 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.7 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 3 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
138.4111°E
Technical Information
Common Questions
How strong was the magnitude 5.0 earthquake near Colonia, Micronesia?
The magnitude 5.0 earthquake that struck 44 km NE of Colonia, Micronesia on October 28, 2021 at 23:35 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 9.7975°, 138.4111°, which is 44 km NE of Colonia, Micronesia.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 5.0 earthquakes can continue for days to weeks and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000fpk2). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, October 28, 2021). M5.0 Earthquake 44 km NE of Colonia, Micronesia — October 28, 2021. Retrieved January 8, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000fpk2/