COMET+ Webinar: Dr Simon Daout, CRPG/ENSG Nancy: 17 May 2023, 4PM UK time
Qi Ou
Dear Colleagues,
COMET (The Centre for Observation and Modelling of Earthquakes, Volcanoes, and Tectonics) invites you to the next installment of our COMET+ webinar series, viewable from the home office.
Along-strike variation of the strain partitioning within the Apennines as seen from large-scale multi-temporal InSAR analysis
Wednesday 17th May 2023 at 4pm UK time (3pm UTC / 5pm CEST / 8am PDT)
Dr Simon Daout
CRPG/ENSG Nancy
Please register at: https://universityofleeds.zoom.us/webinar/register/WN_v0Pf81IxQ260yrN9Zj6H4A (After registering, you will receive a confirmation email containing information on how to join the webinar)
Abstract:
Within the Apennine mountain in the Italian Peninsula, GPS data display 3-4 mm/yr of divergent motion oriented N50˚E between Adria and Tyrrhenian coastlines. However, the driving mechanisms for this extension are still debated and along-strike variations of extension of the actively deforming belt are still poorly constrained. Based on the analysis of 7 years of Sentinel-1 data, this study provides the first large-scale extensional and vertical velocity field derived by a multi-temporal InSAR analysis at the scale of the Apennines, improving the spatial resolution and the vertical accuracy of existing GPS measurements. The results reveal an along-strike variation of the extensional rates and gradients, with a concentration of the extension on single fault systems in northern Apennines, consistent with the locus of the seismicity and recent moderate earthquakes, and a distribution of the extension within central Apennines, where the range is also widening. Vertical surface displacements do not resolve any active long-wavelength uplift of the orogenic belt and show on average more subsidence of the range relative to the Tyrrhenian and Adriatic coasts, than uplift. This work provides the first InSAR-based geodetic map of differential extension and uplift within the Italian Peninsula, compatible with a pure shearing extensional model of the crust, driven by both boundary and gravitational forces.
The COMET+ webinar series promotes research by collaborators of COMET scientists. We aim to provide a platform for these researchers to showcase their work to large and international audiences, opening doors to broader collaborative networks and enhancing the community’s diversity of backgrounds and ideas.
Catch up on past COMET and COMET+ webinars on our YouTube page: https:/www.youtube.com/channel/UCtFDytX1hgjvlS4NH48M2oQ/video
Best wishes,
Scott Watson & Qi Ou
COMET - Centre for the Observation and Modelling of Earthquakes, Volcanoes and Tectonics