Author's Organization:Institute of Earth Science,Hakodate Campus,Hokkaido University of Education Institute of Earth Science,Hakodate Campus,Hokkaido University of Education Institute of Earth Science,Hakodate Campus,Hokkaido University of Education
Published: December 15, 1995Received: February 16, 1995Available on J-STAGE: April 11, 2008Accepted: September 18, 1995
Advance online publication: -
Revised: -