Large E. auteur aut IRD Huyghe P. auteur aut IRD Mugnier J. L. auteur aut IRD Guillier Bertrand auteur aut IRD Taral S. auteur aut IRD Gyawali B. R. auteur aut IRD Chabraborty T. auteur aut IRD text journalArticle eng text/pdf born digital access The pattern of active deformation of frontal structures in Darjeeling Himalaya is complex with out-of-sequence reactivations in the chain and development of scarps associated with earthquake ruptures reaching the surface in the piedmont. To clarify the distribution of active deformation in this area, we analyse passive seismic records by the Horizontal-to-Vertical Spectral Ratio method along three NS trending profiles. We image the Siwalik sedimentary rocks / recent deposits interface under the piedmont and show folded and faulted geometries. Two of these faults are located under scarps of about 10 m affecting the 3.7 +/- 0.7 ka old surface of the Tista megafan. Such features imply that about half of the convergence is expressed south of the Himalayan front while the other part occurs out-of-sequence in the chain, suggesting a very limited activity of the Main Frontal Thrust itself. specialized INDE BENGAL WEST HIMALAYA 064 066 34 6 535-542 2022 0954-4879 https://www.documentation.ird.fr/hor/fdi:010086457 10.1111/ter.12619 0954-4879 [F B010086457] https://www.documentation.ird.fr/hor/fdi:010086457 https://www.documentation.ird.fr/intranet/publi/2022-12/010086457.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2022-12-09 2025-02-24 fdi:010086457 fre