M4.0 Earthquake 75 km SE of Phek, India — July 21, 2023
2023-07-21 20:05:46 UTC (2023-07-21) · approx. 2:05 AM UTC+6 local
On July 21, 2023 at 20:05 UTC, a magnitude 4.0 intermediate depth earthquake struck 75 km SE of Phek, India, at a depth of 86.9 km and coordinates 25.1642°, 95.0080°.
Physical scale: An earthquake of magnitude 4.0 releases seismic energy equivalent to roughly 15 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 347 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
95.0080°E
Technical Information
Common Questions
How strong was the magnitude 4.0 earthquake near Phek, India?
The magnitude 4.0 earthquake that struck 75 km SE of Phek, India on July 21, 2023 at 20:05 UTC had a depth of 86.9 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 4.0 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.0 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000khhf). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, July 21, 2023). M4.0 Earthquake 75 km SE of Phek, India — July 21, 2023. Retrieved September 28, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000khhf/