Scholarly record
NUMERICAL ALGORITHM FOR IDENTIFYING INHOMOGENEITIES IN COMPLICATED MEDIUM
Abstract
An important problem in solving inverse problems in seismology associated with determining the characteristics of a seismic source is obtaining a priori information about the propagation velocities of seismic waves. Along with such factors as the of external noise levels, the geometry of arrangement of the receivers, the parameters of the Earth model, etc., the degree of completeness of information about the velocity characteristics of the medium determines the accuracy of the inverse problem solution. It is especially difficult to obtain such information in media with a pronounced heterogeneity of the structure. Such media include those in areas of volcanic edifices, including mud volcanoes. The main objective of this study is to specify the velocity characteristic of the medium using, as an example the volcanic zone of Mount Karabetova mud volcano (the Taman mud volcanic province). An approach to the calculation and estimation of local velocities of seismic P-waves in mud volcano area based on the grid method is proposed. The numerical algorithm is tested on experimentally obtained arrival times of waves from a vibration source of the SV-10/100 type for the Mount Karabetova mud volcano. Registration of signal was carried out by 35 autonomous stations with sounding from 5 vibrator locations in the frequency range of 10-60 Hz. The results of numerical modeling show that nonlinearity in the hodograph of seismic P-waves in the volcanic edifice area can be identified with 60x60 or more grid nodes, which corresponds to 31.2 m along the X-axis and 48.1 m along the Y-axis. The obtained results of the distribution of local velocities are consistent with the previously obtained geological structure of the study area and indicate higher velocities in the area of an anticlinal fold passing through the volcano zone.
Publication Impact Profile
- Citations
- CrossRef - Citation Indexes: 1
- Scopus - Citation Indexes: 1
- Captures
- Mendeley - Readers: 1
Publication details
References8
Sobisevich A.L., Tveritinova T.Yu., Likhodeev D.V., Beloborodov D.E., Dudarov Z.I., Dolov S.M., Presnov D.A. & Puzich I.N., Deep underground structure of Dzhardzhava mud volcano within south-Kerch anticline structure, Problems of engineering seismology, vol. 42 / Issue 2, 2015, pp.73-80.
Aki K. & Ferrazzini V. Seismic monitoring and modeling of an active volcano for prediction, J. geophys. Res., 2000, vol 105 / Issue B7, pp. 16617-16640.Zhdanov M.
Inverse Theory and Applications in Geophysics, Elsevier Science, 2nd Ed., ISBN: 9780444626745, 2015, 730 p.
Tihonov A. N. Metody resheniya nekorrektnyh zadach / A. N. Tihonov, V. YA. Arsenin. — Nauka, Russia, 1986. — 287 p. (in Russian).
Kahaner D. Numerical methods and software / D. Kahaner, K. Mouler, S. Nesh. — Prentice-Hall, Inc., USA. — 1988. — 495 p.
John E. Peterson, Bjorn N. P. Paulsson, and Thomas V. McEvilly, Applications of algebraic reconstruction techniques to crosshole seismic data, Society of Exploration Geophysicists, Oct. 1985, vol. 50 / Issue 10, ISSN: 0016-8033, pp. 1525–1648.
Tagirov H. Yu., Aslanov T. G., Magomedov H. D., Opredelenie srednevzveshennoj skorosti sejsmicheskoj volny na uchastkah Zemli po puti ee rasprostraneniya, Izvestiya DGPU. Estestvennye i tochnye nauki, Russia, 2017, vol. 11. / No 3, pp. 108–114 (in Russian).
Izmenenie okruzhayushchej sredy i klimata prirodnye i svyazannye s nimi tekhnogennye katastrofy: monografiya: 8 V. / Pred. red. kol.: N.P. Laverov. RAN. — M.: IFZ RAN, 2008. Vol. 1: Sejsmicheskie processy i katastrofy / Otv. red. A.O. Gliko. — M.: IFZ RAN, Russia, 2008. — 404 p. (in Russian).
View or Download full articleAccess options
SWS access login
Login as SWS Scientific CommitteeLogin as SWS Scientific PartnerLogin as SWS AuthorAuthors and approved SWS contributors will read and export their own linked papers after identity matching by SWS profile, email and SGEM GlobalID.
For librarian assistance: [email protected]
Purchase Instant Access
- Article can be downloaded after successful payment.
- Article may be used according to SWS library access terms.
- Article cannot be redistributed.