Submitted on: 15 September 1998.
Revised on: 06 January 1999.
Accepted on: 02 March 1999.
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Submitted on: 19 January 2001.
Revised on: 23 April 2001.
Accepted on: 15 June 2001.
___________________JOURNAL OF APPLIED GEOPHYSICS---ELSEVIER
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Submitted on: 19 August 2013.
Revised on: 28 September 2013.
Accepted on: 20 November 2013.
___________________JOURNAL OF APPLIED GEOPHYSICS---ELSEVIER
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Submitted on: 22 March 2010.
Revised on: 14 May 2010.
Accepted on: 10 June 2010.
___________________JOURNAL OF APPLIED GEOPHYSICS---ELSEVIER
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Submitted on: 15 August 2007.
Revised on: 24 October 2007.
Accepted on: 15 December 2007.
___________________JOURNAL OF APPLIED GEOPHYSICS---ELSEVIER
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