The research
We present a new homogeneous earthquake catalogue 10-year-long (2010–2020) related to the activity of the Alto Tiberina (ATF) low-angle normal fault system (Northern Apennines of Italy). The analyzed seismicity has been recorded by the seismic network of The Alto Tiberina Near Fault Observatory (TABOO-NFO), a dense array composed of 60 broad band and short period seismographs, partly located at surface and within shallow boreholes, covering an area of about 120×120 km2. Such a network configuration allows a very low detection threshold of seismic events.
We use the new seismic catalogue to revise the down-dip geometry of the ATF system and to investigate the spatiotemporal distribution of the seismicity and its mechanical and kinematic properties.
The product
A catalogue composed by high-resolution locations of almost 100,000 events with ML< 3.9 and completeness magnitude ≈ 0.1 ML. A list of station corrections for on-purpose the calculated 1D velocity model.
Method
Earthquake hypocenters have been determined by the non-linear earthquake location code NonLinLoc applied to human revised and automatic P- and S-onsets, using a new best-fit 1D velocity model and newly estimated static station corrections.
