M4.1 Earthquake 4 km SSW of Kadzhi-Say, Kyrgyzstan — September 30, 2023
2023-09-30 21:30:08 UTC (2023-09-30) · approx. 2:30 AM UTC+5 local
On September 30, 2023 at 21:30 UTC, a magnitude 4.1 shallow crustal earthquake struck 4 km SSW of Kadzhi-Say, Kyrgyzstan, at a depth of 10.0 km and coordinates 42.1062°, 77.1640°.
Physical scale: An earthquake of magnitude 4.1 releases seismic energy equivalent to roughly 21 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 406 m — 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
77.1640°E
Technical Information
Common Questions
How strong was the magnitude 4.1 earthquake near Kadzhi-Say, Kyrgyzstan?
The magnitude 4.1 earthquake that struck 4 km SSW of Kadzhi-Say, Kyrgyzstan on September 30, 2023 at 21:30 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.1 earthquakes can continue for several days and gradually diminish over time.
Actions
Understanding This Data
Magnitude 4.1 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us6000lbys). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, September 30, 2023). M4.1 Earthquake 4 km SSW of Kadzhi-Say, Kyrgyzstan — September 30, 2023. Retrieved December 9, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000lbys/