|Fig. 1 - Teramo cross-section|
The two figures show the hypocentres of the areas of Teramo and Muccia (central Italy). The hypocentres distribution show the main seismic sources.
The Teramo cross-section (fig.1) shows the detachment characterized by NE-dipping surface and the master fault (f) characterized by SW-dipping surface. The main earthquakes with a magnitude of M = 3.0 (14/03/2018) is close to detachment. The cross-section data does not show a "dilated wedge" patterns.
|fig. 2 - Muccia cross-section|
The Muccia cross-section (fig. 2) shows the detachment characterized by NE-dipping surface and the master fault (f) characterized by SW-dipping surface. The main earthquakes with a magnitude of M = 3.5 (08/03/2018) is close to master fault. The cross-section data shows an clear "dilated wedge" patterns.
This patterns geometry is characteristic of the seismic sequence of central Italy and in other areas such as the 2009 L'Aquila seismic sequence. The dilated wedge indicates how the area is weakened structurally compared to nearby areas. It is plausible to think that in the future an earthquake with greater magnitude will occur around the area. It is not possible to define the time, place and magnitude with a deterministic approach.
Balocchi et al., 2017 - Considerations on the seismotectonics and seismogenesis of the Tiberina-Gubbio Valley extensional system (central Italy).
Petricca et al., 2015 - Graviquakes in Italy.