Paper Info
Title
Earthquake-Induced Landslide Mapping for the 2018 Hokkaido Eastern Iburi Earthquake Using PALSAR-2 Data
Abstract
Timely information about landslides during or immediately after an event is an invaluable source for emergency response and management. Using an active sensor, synthetic aperture radar (SAR) can capture images of the earth's surface regardless of weather conditions and may provide a solution to the problem of mapping landslides when clouds obstruct optical imaging. The 2018 Hokkaido Eastern Iburi earthquake (M-w 6.6) and its aftershocks not only caused major damage with severe loss of life and property but also induced many landslides across the area. To gain a better understanding of the landslides induced by this earthquake, we proposed a method of landslide mapping using pre- and post-event Advanced Land Observation Satellite 2 Phased Array L-band Synthetic Aperture Radar 2 (ALOS-2 PALSAR-2) images acquired from both descending and ascending orbits. Moreover, the accuracy of the classification results was verified by comparisons with high-resolution optical images, and ground truth data (provided by GSI, Japan). The detected landslides show a good match with the reference optical images by visual comparison. The quantitative comparison results showed that a combination of the descending and ascending intensity-based landslide classification had the best accuracy with an overall accuracy and kappa coefficient of 80.1% and 0.45, respectively.
Year
DOI
Venue
2019
10.3390/rs11202351
REMOTE SENSING
Keywords
DocType
Volume
the Hokkaido Eastern Iburi earthquake,landslides,SAR intensity,coherence,optical satellite images,quantitative comparison of SAR images
Journal
11
Issue
Citations 
PageRank 
20
0
0.34
References 
Authors
0
4
Name
Order
Citations
PageRank
Yusupujiang Aimaiti100.34
Wen Liu28619.59
Fumio Yamazaki313521.69
Yoshihisa Maruyama401.69