Lineaments in the relief are usually the surface manifestation of faults of various depths of age and size, ruptures, fractures, zones of increased strain concentration, gradient zones of geophysical fields and other manifestations of various structural disturbances. The application of methods of geomorphometric analysis of digital elevation model (DEM) of the seabed to identify lineaments is a developing direction. The Caspian Sea area can be considered as a good scientific platform for the development of lineament identification methods using the methods of geomorphometric analysis of the bottom DEM, in particular, shadow analysis and identification of keel forms by calculating the relief curvature. The region is seismically active and has been studied for a long time, so there is a significant amount of data to verify the results of lineament extraction on a regional scale. This study has shown that it is promising to combine the results of geomorphometric analysis with data on the distribution of earthquake epicentres.

Natalia V. Libina
Candidate of Technical Sciences, Senior Researcher
Shirshov Institute of Oceanology, Russian Academy of Sciences
36, Nakhimovsky prospect, Moscow, 117997, Russia
e-mail: lnatvit@mail.ru
SPIN-code: 8971-7458
AuthorID: 610119

Sergey A. Kovachev
Сandidate of Physical and Mathematical Sciences,
Leading Researcher
Shirshov Institute of Oceanology, Russian Academy of Sciences
36, Nakhimovsky prospect, Moscow, 117997, Russia
e-mail: kovachev@ocean.ru
SPIN-code: 5929-2047
AuthorID: 58626

Victoria A. Putans
Сandidate of Geological and Mineralogical Sciences,
Senior Researcher
Shirshov Institute of Oceanology, Russian Academy of Sciences
36, Nakhimovsky prospect, Moscow, 117997, Russia
e-mail: vitapu@mail.ru
ORCID: 0000-0003-3538-1619
ResearcherID: E-8019-2017
SPIN-code: 6975-9408
AuthorID: 162247

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