The crustal structure of eastern Siberia is poorly known due to its inaccessibility and the sparseness of seismic stations and larger earthquakes. Peaceful Nuclear Explosions (PNEs), detonated by the former Soviet Union are seismologically significant because they are so-called Ground Truth events. Analog PNE seismograms from regional stations in eastern Siberia were digitized allowing modern processing techniques to be applied to the waveforms. Amplitude measurements from PNEs as well as data from local earthquakes were added to the Phillips et al. (2009) attenuation tomography model of Eastern Russia. Early results exhibit differential attenuation in areas southeast of Lake Baikal, where we see high attenuation (low Q) for Pn and Pg phases and low attenuation (high Q) for Lg (Sg) phases. Paths through the eastern edge of the Siberian Craton have low attenuation (high Q) for Pn, Pg and Lg (Sg) phases.
Presenting Author: Kaitlynn Burkhard
Authors
Kaitlynn Burkhard
Presenting Author Corresponding Author
burkha81@msu.edu
Michigan State University, East Lansing, Michigan, United States
Presenting Author
Corresponding Author
William S Phillips
wsp@lanl.gov
Los Alamos National Laboratory, Los Alamos, New Mexico, United States
Kevin Mackey
mackeyke@msu.edu
Michigan State University, East Lansing, Michigan, United States
Anna Dobrynina
dobrynina@crust.irk.ru
Institute of the Earth's Crust, Irkutsk, , Russian Federation
Phase Attenuation in Eastern Russia Using Peaceful Nuclear Explosion Seismograms