Using multi-band InSAR data for detecting local deformation phenomena induced by the 2016–2017 Central Italy seismic sequence

The Relationship between InSAR Coseismic Deformation and Earthquake-Induced Landslides Associated with the 2017 Mw 3.9 Ischia (Italy) Earthquake

“…The following are available online at http://www.mdpi.com/2076-3263/8/8/303/s1. Figure S1: Sentinel-1 InSAR coseismic ground displacements along descending orbit (16)(17)(18)(19)(20)(21)(22) August 2017) processed by De Novellis et al [9] (available at https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/ 2017GL076336) superimposed to the areas affected by past earthquake-induced landslides (blue lines) [6]. The yellow star locates the Ischia earthquake epicenter.…”

“…Key to the legend: (1) volcaniclastic deposits; (2) volcanics younger than 10 ka; (3) volcanics aged between 28 and 18 ka; (4) volcanics aged between 55 and 33 ka; (5) siltstones and sandstones (Colle Jetto formation); (6) Mt. Epomeo Green Tuff (55 ka); (7) volcanics aged between 75 and 55 ka; (8) volcanics older than 75 ka; (9) main faults; (10) landslide area during the 1883 earthquake [3]; (11) earthquake-induced debris flows and (12) debris slides [3]; (13) IOCA accelerometric station; (14) Ischia earthquake epicenter (http://cnt.rm.ingv.it/); (15) collapse of drywall; (16) coseismic sliding; (17) fractures; (18) ruptures [5]. The orange squares classify the historical seismicity according to their MCS intensity [8].…”

“…Many phenomena can contribute to ground deformation after strong earthquakes, including the fault slip [10], the compaction induced by liquefaction [11,12], and the earthquake-triggered slope instabilities [13][14][15][16][17]. All these phenomena play different roles depending on the geological, geotechnical, and hydrogeological features of the epicentral area.…”

Gravity Versus Tectonics: The Case of 2016 Amatrice and Norcia (Central Italy) Earthquakes Surface Coseismic Fractures

“…Other researchers (Bonini et al, ; Valensise et al, ) contended that the causative fault for the 2016 earthquake sequence is an inverted, shallow dipping thrust and that the steep CVF is a secondary feature. Other researchers pointed out that the surface displacement seen after the Amatrice earthquake along the western flank of Mount Vettore is disconnected from the primary coseismic subsidence (Gruppo di lavoro IREA‐CNR & INGV, ; Polcari et al, ), interpreting it as partially (Albano et al, ) or entirely (Gispert Busquets, ; Huang et al, ) due to landslide displacement. Most of the surface fractures caused by the Amatrice shock were rather suspiciously observed along the western flank of Mount Vettore, where selective erosion and gravity‐driven movements have been reported in preearthquake literature (e.g., Coltorti & Farabollini, ; Giovagnotti, ).…”

“…Other researchers Valensise et al, 2016) contended that the causative fault for the 2016 earthquake sequence is an inverted, shallow dipping thrust and that the steep CVF is a secondary feature. Other researchers pointed out that the surface displacement seen after the Amatrice earthquake along the western flank of Mount Vettore is disconnected from the primary coseismic subsidence (Gruppo di lavoro IREA-CNR & INGV, 2016; Polcari et al, 2017), interpreting Figure 1. The 2016 central Italy earthquake sequence and its associated surface deformation along the western slopes of Mount Vettore.…”