Journal Title
Title of Journal: J Earth Syst Sci
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Abbravation: Journal of Earth System Science
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Publisher
Springer-Verlag
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Authors: KRISHNA KUMAR PRAVIN K GUPTA SRI NIWAS
Publish Date: 2011/09/17
Volume: 120, Issue: 4, Pages: 595-604
Abstract
This paper presents an efficient algorithm FDA2DMT Free Decay Analysis for 2D Magnetotellurics MT based on eigenmode approach to solve the relevant partial differential equation for forward computation of twodimensional 2D responses The main advantage of this approach lies in the fact that only a small subset of eigenvalues and corresponding eigenvectors are required for satisfactory results This small subset prespecified number of eigenmodes are obtained using shift and invert implementation of Implicitly Restarted Lanczos Method IRLM It has been established by experimentation that only 15–20 smallest eigenvalue and corresponding eigenvectors are sufficient to secure the acceptable accuracy Once the single frequency response is computed using eigenmode approach the responses for subsequent frequencies can be obtained in negligible time Experiment design results for validation of FDA2DMT are presented by considering two synthetic models from COMMEMI report BrewittTaylor and Weaver 1976 model and a field data based model from Garhwal Himalaya
Keywords:
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- Evidence of Late Quaternary seismicity from Yunam Tso, Lahaul and Spiti, NW Himalaya, India
- Century scale climate change in the central highlands of Sri Lanka
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