On the Segmentation of the Cephalonia–Lefkada Transform Fault Zone (Greece) from an InSAR Multi-Mode Dataset of the Lefkada 2015 Sequence
by
Nikos Svigkas 1,2,3,*
, Simone Atzori 2, Anastasia Kiratzi 1, Cristiano Tolomei 2, Andrea Antonioli 2, Ioannis Papoutsis 3, Stefano Salvi 2 and Charalampos (Haris) Kontoes 3
Nikos Svigkas 1,2,3,*, Simone Atzori 2, Anastasia Kiratzi 1, Cristiano Tolomei 2, Andrea Antonioli 2, Ioannis Papoutsis 3, Stefano Salvi 2 and Charalampos (Haris) Kontoes 3
1
Department of Geophysics, Faculty of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
2
Osservatorio Nazionale Terremoti, Istituto Nazionale di Geofisica e Vulcanologia, 00143 Roma, Italy
3
Institute of Space Applications and Remote Sensing, National Observatory of Athens, 15236 Athens, Greece
*
Author to whom correspondence should be addressed.
Remote Sens. 2019, 11(16), 1848; https://doi.org/10.3390/rs11161848
Received: 17 July 2019 / Revised: 4 August 2019 / Accepted: 6 August 2019 / Published: 8 August 2019
We use Interferometric Synthetic Aperture Radar (InSAR) to study the Cephalonia–Lefkada Transform Fault Zone (CTF) in the Ionian Sea. The CTF separates continental subduction to the north from oceanic subduction to the south, along the Hellenic Subduction Zone. We exploit a rich multi-modal radar dataset of the most recent major earthquake in the region, the 17 November 2015 Mw 6.4 event, and present new surface displacement results that offer additional constraints on the fault segmentation of the area. Based on this dataset, and by exploiting available information of earthquake relocation, we propose a new rupture process for the 2015 sequence, complementary to those published already. Our modelling includes an additional southern fault segment, oblique to the segment related with the mainshock, which indicates that the CTF structure is more complex than previously believed.
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Svigkas, N.; Atzori, S.; Kiratzi, A.; Tolomei, C.; Antonioli, A.; Papoutsis, I.; Salvi, S.; Kontoes, C.H. On the Segmentation of the Cephalonia–Lefkada Transform Fault Zone (Greece) from an InSAR Multi-Mode Dataset of the Lefkada 2015 Sequence. Remote Sens. 2019, 11, 1848.
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