Open Access

Landform and local site effects on the colonies worst-hit by the 2004 mid-Niigata prefecture, Japan, earthquake

  • Masayuki Yoshimi110Email author,
  • Taku Komatsubara210,
  • Yoshinori Miyachi210,
  • Katsumi Kimura210,
  • Haruko Sekiguchi110,
  • Masayuki Saeki310,
  • Sunao Kunimatsu110,
  • Kunikazu Yoshida110,
  • Masanori Ozaki210,
  • Tsutomu Nakazawa210,
  • Rei Nakashima210 and
  • Hidetaka Saomoto110
Earth, Planets and Space201457:BF03351845

https://doi.org/10.1186/BF03351845

Received: 24 February 2005

Accepted: 28 June 2005

Published: 20 June 2014

Abstract

Landform and damage classification surveys have been conducted on six colonies worst-hit by the 2004 mid-Niigata prefecture earthquake. The landform was classified using aerial photographs taken by the US Air Force in 1947. Damage degree of each structure has been classified into four classes including foundation damage class, and location of each structure has been mapped with damage class. Around 1,000 houses and stores have been classified and mapped. In five of six colonies, buildings on the fans composed of colluvial deposits have been more likely suffered severe damage than those on terraces or dissected valleys. In the other colony located on a flood plain, no clear difference in degree of damage among landforms has been observed.

Key words

2004 mid-Niigata prefecture earthquake damage distribution terrace fan local site effect