A LIMITED-MEMORY QUASI-NEWTON INVERSION FOR 1D MAGNETOTELLURICS

Avdeeva A.; Avdeev D.

dc.contributor.author	Avdeeva A.
dc.contributor.author	Avdeev D.
dc.date.accessioned	2024-12-22T03:47:53Z
dc.date.available	2024-12-22T03:47:53Z
dc.date.issued	2006
dc.identifier	https://www.elibrary.ru/item.asp?id=13519497
dc.identifier.citation	Geophysics, 2006, 71, 5,
dc.identifier.issn	0016-8033
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/47057
dc.description.abstract	We apply a limited-memory quasi-Newton (QN) method to the 1D magnetotelluric (MT) inverse problem. Using this method we invert a realistic synthetic MT impedance data set calculated for a layered earth model. The calculation of gradients based on the adjoint method speeds up the inverse problem solution many times. In addition, regularization stabilizes the QN inversion result and a few correction pairs are sufficient to produce reasonable results. Comparison with the L-BFGS-B algorithm shows similar convergence rates. This study is a first step towards the solution of large-scale electromagnetic problems, with a full treatment of the 3D conductivity structure of the earth. © 2006 Society of Exploration Geophysicists.
dc.subject	GEOMAGNETISM
dc.subject	GEOPHYSICS COMPUTING
dc.subject	INVERSE PROBLEMS
dc.subject	TERRESTRIAL ELECTRICITY
dc.title	A LIMITED-MEMORY QUASI-NEWTON INVERSION FOR 1D MAGNETOTELLURICS
dc.type	Статья
dc.identifier.doi	10.1190/1.2236381