M4.6 Earthquake 13 km SSE of Mandráki, Greece — September 29, 2021
2021-09-29 22:22:17 UTC (2021-09-29) · approx. 12:22 AM UTC+2 local
On September 29, 2021 at 22:22 UTC, a magnitude 4.6 shallow crustal earthquake struck 13 km SSE of Mandráki, Greece, at a depth of 10.0 km and coordinates 36.4896°, 27.1703°.
Physical scale: An earthquake of magnitude 4.6 releases seismic energy equivalent to roughly 120 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 899 m — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Greece, a region characterized by the Hellenic subduction zone, where the African Plate subducts northward beneath the Aegean at roughly 35 mm per year. The nearest mapped fault system is the Hellenic Trench. View all earthquakes in Greece.
Learn more: Magnitude scale · Aftershock sequences
Earthquake Details
27.1703°E
Technical Information
Nearby Earthquakes (Last 7 Days)
Common Questions
How strong was the magnitude 4.6 earthquake near Mandráki, Greece?
The magnitude 4.6 earthquake that struck 13 km SSE of Mandráki, Greece on September 29, 2021 at 22:22 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 36.4896°, 27.1703°, which is 13 km SSE of Mandráki, Greece. View all earthquakes in Greece.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.6 earthquakes can continue for several days and gradually diminish over time.
Has Greece had earthquakes this big before?
The largest recorded earthquake in Greece was the M8.5 Crete earthquake of June 29, 1303. Today's magnitude 4.6 event is significantly smaller than that historical record.
Authoritative source: USGS event page (event ID: us6000fq9m). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, September 29, 2021). M4.6 Earthquake 13 km SSE of Mandráki, Greece — September 29, 2021. Retrieved December 4, 2021 from https://www.earthquaketracker.org/earthquakes/event/us6000fq9m/