M3.5 Earthquake 1 km S of Impruneta, Italy — May 12, 2022
2022-05-12 21:12:04 UTC (2022-05-12) · approx. 10:12 PM UTC+1 local
Felt by 18 people across nearby locations.
On May 12, 2022 at 21:12 UTC, a magnitude 3.5 shallow crustal earthquake struck 1 km S of Impruneta, Italy, at a depth of 7.9 km and coordinates 43.6720°, 11.2558°. This earthquake was detected by 38 seismic stations with excellent location accuracy and was assigned a USGS significance rating of 197, placing it among routine seismic activity.
Physical scale: An earthquake of magnitude 3.5 releases seismic energy equivalent to roughly 2.7 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 157 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
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from 18 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
11.2558°E
Technical Information
Common Questions
How strong was the magnitude 3.5 earthquake near Impruneta, Italy?
The magnitude 3.5 earthquake that struck 1 km S of Impruneta, Italy on May 12, 2022 at 21:12 UTC had a depth of 7.9 km. For context, this was a minor earthquake typically detected only by instruments.
Where did the earthquake occur?
The earthquake epicenter was located at 43.6720°, 11.2558°, which is 1 km S of Impruneta, Italy. View all earthquakes in Italy.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 3.5 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 3.5 event is significantly smaller than that historical record.
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Location
Authoritative source: USGS event page (event ID: us6000hkpc). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, May 12, 2022). M3.5 Earthquake 1 km S of Impruneta, Italy — May 12, 2022. Retrieved November 4, 2023 from https://www.earthquaketracker.org/earthquakes/event/us6000hkpc/