M4.5 Earthquake 78 km NW of Phôngsali, Laos — October 11, 2023
2023-10-11 23:02:11 UTC (2023-10-11) · approx. 6:02 AM UTC+7 local
On October 11, 2023 at 23:02 UTC, a magnitude 4.5 shallow crustal earthquake struck 78 km NW of Phôngsali, Laos, at a depth of 10.0 km and coordinates 22.2347°, 101.6297°. This earthquake was detected by 25 seismic stations with good 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
101.6297°E
Technical Information
Common Questions
How strong was the magnitude 4.5 earthquake near Phôngsali, Laos?
The magnitude 4.5 earthquake that struck 78 km NW of Phôngsali, Laos on October 11, 2023 at 23:02 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 22.2347°, 101.6297°, which is 78 km NW of Phôngsali, Laos.
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: us6000ley3). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, October 11, 2023). M4.5 Earthquake 78 km NW of Phôngsali, Laos — October 11, 2023. Retrieved December 16, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000ley3/