M4.5 Earthquake 90 km SSW of Anacapri, Italy — February 27, 2023
2023-02-27 21:50:10 UTC (2023-02-27) · approx. 10:50 PM UTC+1 local
On February 27, 2023 at 21:50 UTC, a magnitude 4.5 deep-focus earthquake struck 90 km SSW of Anacapri, Italy, at a depth of 414.8 km and coordinates 39.7821°, 13.8609°. This earthquake was detected by 135 seismic stations with excellent 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.
The epicenter is located in Italy, a region characterized by the Apennine extensional belt and Calabrian subduction zone, where Africa-Eurasia convergence produces complex faulting. View all earthquakes in Italy.
Learn more: Magnitude scale · Aftershock sequences
Earthquake Details
13.8609°E
Technical Information
Common Questions
How strong was the magnitude 4.5 earthquake near Anacapri, Italy?
The magnitude 4.5 earthquake that struck 90 km SSW of Anacapri, Italy on February 27, 2023 at 21:50 UTC had a depth of 414.8 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 39.7821°, 13.8609°, which is 90 km SSW of Anacapri, Italy. View all earthquakes in Italy.
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.
Has Italy had earthquakes this big before?
The largest recorded earthquake in Italy was the M7.2 Messina earthquake of December 28, 1908. Today's magnitude 4.5 event is significantly smaller than that historical record.
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Location
Authoritative source: USGS event page (event ID: us7000jg46). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2023, February 27, 2023). M4.5 Earthquake 90 km SSW of Anacapri, Italy — February 27, 2023. Retrieved May 8, 2023 from https://www.earthquaketracker.org/earthquakes/event/us7000jg46/