M4.2 Earthquake 51 km SE of Ýdra, Greece — September 15, 2023
2023-09-15 22:57:15 UTC (2023-09-15) · approx. 12:57 AM UTC+2 local
On September 15, 2023 at 22:57 UTC, a magnitude 4.2 intermediate depth earthquake struck 51 km SE of Ýdra, Greece, at a depth of 119.4 km and coordinates 37.0618°, 23.9203°.
Physical scale: An earthquake of magnitude 4.2 releases seismic energy equivalent to roughly 30 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 476 m — a useful intuition for the size of the slip patch on the fault.
Earthquake Details
23.9203°E
Technical Information
Common Questions
How strong was the magnitude 4.2 earthquake near Ýdra, Greece?
The magnitude 4.2 earthquake that struck 51 km SE of Ýdra, Greece on September 15, 2023 at 22:57 UTC had a depth of 119.4 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 4.2 earthquakes can continue for several days and gradually diminish over time.
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Understanding This Data
Magnitude 4.2 earthquakes are often felt but rarely cause damage.
Authoritative source: USGS event page (event ID: us7000kw3i). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, September 15, 2023). M4.2 Earthquake 51 km SE of Ýdra, Greece — September 15, 2023. Retrieved November 18, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000kw3i/