The aftershock zone is about 20 km long and the focal mechanism is for a tensional (“normal”) rupture on a fault striking northwest consistent with the Apennine ranges.

The aftershock zone is about 20 km long and the focal mechanism is for a tensional ("normal") rupture on a fault striking northwest consistent with the Apennine ranges.

The aftershock zone is about 20 km long and the focal mechanism is for a tensional (“normal”) rupture on a fault striking northwest consistent with the Apennine ranges.