Contact Person: Dr. Ioannis Papoutsis

SENTINEL INTERFEROGRAM OF THE 26/10/2016 AND 30/10/2016 SEISMIC EVENTS IN CENTRAL ITALY

A series of major earthquakes struck Central Italy between the Marche and Umbria regions, in October 2016. The magnitudes of the 26th and 30th of October 2016 earthquakes were-respectively- Mw=6.1 and Mw=6.5, and considered to be the most powerful earthquakes to hit Italy since 1980. According to the authorities reports, there were about a dozen injuries, with one person described as being in serious condition, but no casualties reported. The destructive shock on 26 October was preceded by the foreshock by two hours, causing people to leave their homes and be safer when the larger shock occurred. On the 30th of October, emergency services pulled three people from the rubble in Tolentino, a town in Marche. Main roads to the affected areas were closed, some impassable due to large boulders falling to the ground in the rocky, mountainous terrain. Shortly after the earthquake that occurred on the 30th of October 2016, two successive descending Sentinel-1 Synthetic Aperture Radar images were acquired, one before (20/10/2016) the devastating earthquakes and one right after (1/11/2016).The mapping unit of the BEYOND/NOA calculated the full deformation pattern, which is associated with both the earthquake events of October 2016. This map shows the fringe pattern associated with both events, where each color cycle demonstrates phase difference of [-π π], interpreted as ground deformation equal to 2.8 cm in the direction to the satellite.

~The BEYOND project Geo-hazard team

 

 Figure: Fringe pattern associated with both (26/10/2016 and 30/10/2016)events, where each color cycle demonstrates phase difference of [-π π], interpreted as ground deformation equal to 2.8 cm in the direction to the satellite.