M4.5 Earthquake 187 km NNE of Colonia, Micronesia — April 18, 2024
2024-04-18 19:18:21 UTC (2024-04-18) · approx. 4:18 AM UTC+9 local
On April 18, 2024 at 19:18 UTC, a magnitude 4.5 shallow crustal earthquake struck 187 km NNE of Colonia, Micronesia, at a depth of 10.0 km and coordinates 11.0476°, 138.8477°. This earthquake was detected by 38 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 312, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 4.5 releases seismic energy equivalent to roughly 85 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 767 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
138.8477°E
Technical Information
Common Questions
How strong was the magnitude 4.5 earthquake near Colonia, Micronesia?
The magnitude 4.5 earthquake that struck 187 km NNE of Colonia, Micronesia on April 18, 2024 at 19:18 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 11.0476°, 138.8477°, which is 187 km NNE of Colonia, Micronesia.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.5 earthquakes can continue for several days and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us6000mtsc). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2024, April 18, 2024). M4.5 Earthquake 187 km NNE of Colonia, Micronesia — April 18, 2024. Retrieved June 25, 2024 from https://www.earthquaketracker.org/earthquakes/event/us6000mtsc/