Scholarly record
RECEIVER FUNCTIONS APPLICATION FOR STUDYING THE DEEP STRUCTURE OF THE LENA DELTA REGION
Abstract
Receiver function analysis is a critical tool in seismology, used to study the deep structure of the crust and upper mantle. Information about the deep structure of the crust and seismicity is important initial data for developing a source model and seismic hazard assessment. The presence of sharp discontinuities beneath the monitoring station induces the generation of converted body waves, which propagate at slower velocities than those of the primary P-wave. Receiver function analysis utilizes the lag between the arrival times of converted waves to estimate the depths of interfaces. Furthermore, by using various inversion algorithms, including receiver function inversion and surface wave group velocity inversion, a shear wave velocity model under the station can be inferred. This study seeks to examine the depth-velocity structure of the Lena Delta by analyzing receiver functions and surface-wave data. Receiver function analysis was performed using waveforms from the TIXI station, a component of the Yakutsk Regional Seismic Network of the Russian Federation. For the analysis, 245 large earthquakes (Ml > 7) occurring between 2000 and 2024, and located at distances ranging from 20- to 100- from the station, were initially selected. The iterative deconvolution was then used to obtain radial and transverse receiver functions. Three different inversion algorithms were used to attain the velocity model: receiver function inversion (rftn96), Rayleigh group wave velocity inversion (surf96), and joint inversion (joint96). A wide peak lasting from 3 to 5 seconds after the initial P-wave arrival and a sharp peak at 7.5 seconds were observed on the radial receiver function. The presence of two distinct peaks complicates the application of conventional H-k stacking analysis, which assumes a single discontinuity. Rayleigh wave group velocity inversion only showed one sharp increase in shear wave velocity at 15 km, while both receiver function inversion and joint inversion showed step-like increases at 15, 30, and 40 km, which indicates the presence of layer boundaries at these depths. The obtained values are consistent with existing data on the region, including deep seismic sounding profiles and crustal models. Previous research, along with the findings of this study, indicates that 15 km is most likely the boundary between the upper and the lower crust, 30 km is a transition to the anomalous mantle, and 40 km is the Moho boundary.
Publication Impact Profile
- Captures
- Mendeley - Readers: 1
Publication details
References12
Avetisov, G.P. Hypocentria and focal mechanisms of earthquakes of the Lena River delta and its surroundings. Volcanology and Seismology, Russia, vol. 6, pp. 59-69, 1991 (in Russian).
Avetisov, G.P., Guseva, Y.B. Deep structure of the Lena delta area according to seismological data. Soviet Geology, Russia, vol. 4, pp. 73-80, 1991 (in Russian).
Imaeva L.P., Gusev G.S., Imaev V.S., Dynamics of the relief and seismotectonic activity of the modern structures in the Lena River delta, Geotectonics, Russia, vol. 5, pp. 62-77, 2019 (in Russian). DOI: 10.31857/s0016-853x2019562-77
Porritt, R.W., Miller, M.S. Updates to FuncLab, a Matlab based GUI for handling receiver functions. Computers & Geosciences, vol. 111, pp. 260�271, 2018. DOI: 10.1016/j.cageo.2017.11.022
Ligorria, J.P., Ammon, C.J. Iterative deconvolution and receiver-function estimation. Bulletin of the Seismological Society of America, vol. 89, no. 5, pp. 1395�1400, 1999. DOI: 10.1785/bssa0890051395
Herrmann, R.B. Computer programs in seismology: An evolving tool for instruction and research. Seismological Research Letters, vol. 84, pp. 1081-1088, 2013. DOI: 10.1785/0220110096
Kennett, B.L.N. Engdahl, E.R., Buland R. Constraints on seismic velocities in the Earth from travel times. Geophysical Journal International, 122, pp. 108-124, 1995. DOI: 10.1111/j.1365-246x.1995.tb03540.x
Dziewonski, A., Bloch, S., Landisman, M. A technique for the analysis of transient seismic signals. Bulletin of the Seismological Society of America, vol. 59, no. 1, pp. 427�444, 1969. DOI: 10.1785/bssa0590010427
Avetisov, G.P. Seismicity and depth structure of the Laptev Sea and the Novosibirsk Islands. Structure of the Earth's crust of continents and oceans, Publishing House of the Leningrad State University, Proceedings of LOE 1983, vol. 77, pp. 117-124. 1983 (in Russian)
Atlas "REFERENCE GEOLOGICAL AND GEOPHYSICAL PROFILES OF RUSSIA, Deep seismic sections along DSS profiles". Saint-Petersburg, 2013 (in Russian)
Laske, G., Masters, G., Ma, Z., Pasyanos, M. Update on CRUST1.0 - A 1-degree Global Model of Earth�s Crust. Presented at the EGU General Assembly Conference Abstracts, EGU2013-2658, 2013.
Cherepanova, Y., Artemieva, I.M., Thybo, H., Chemia, Z. Crustal structure of the Siberian craton and the West Siberian basin: An appraisal of existing seismic data. Tectonophysics, vol. 609, pp. 154�183, 2013. DOI: 10.1016/j.tecto.2013.05.004
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.