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Open AccessArticle

Earthquake-Induced Landslide Mapping for the 2018 Hokkaido Eastern Iburi Earthquake Using PALSAR-2 Data

1
Graduate School of Engineering, Chiba University, Chiba 263-8522, Japan
2
National Research Institute for Earth Science and Disaster Resilience, Tsukuba, Ibaraki 305-0006, Japan
*
Author to whom correspondence should be addressed.
Remote Sens. 2019, 11(20), 2351; https://doi.org/10.3390/rs11202351
Received: 30 August 2019 / Revised: 30 September 2019 / Accepted: 8 October 2019 / Published: 10 October 2019
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 (Mw 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. View Full-Text
Keywords: the Hokkaido Eastern Iburi earthquake; landslides; SAR intensity; coherence; optical satellite images; quantitative comparison of SAR images the Hokkaido Eastern Iburi earthquake; landslides; SAR intensity; coherence; optical satellite images; quantitative comparison of SAR images
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MDPI and ACS Style

Aimaiti, Y.; Liu, W.; Yamazaki, F.; Maruyama, Y. Earthquake-Induced Landslide Mapping for the 2018 Hokkaido Eastern Iburi Earthquake Using PALSAR-2 Data. Remote Sens. 2019, 11, 2351.

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