NDLI: The 2011 Tohoku earthquake and the related disasters observed by InSAR using ALOS/PALSAR: Mainshock, induced inland earthquakes, and liquefaction

Content Provider	IEEE Xplore Digital Library
Author	Kobayashi, T.
Copyright Year	2013
Description	Author affiliation: Geospatial Inf. Authority of Japan, Tsukuba, Japan (Kobayashi, T.)
Abstract	Applying an interferometric SAR (InSAR) analysis to the 2011 Tohoku earthquake, we succeeded in mapping a ground displacement distributed all over eastern Japan. The InSAR analysis incorporating GNSS data is inevitable to accurately obtain deformation map covering a vast area, even when using precise orbit information. We further detected locally-distributed ground deformation anomalies due to several induced crustal inland earthquakes. For the Fukushima-Hamadori earthquake, clear displacement discontinuities corresponding to earthquake surface faults can be identified in the interferogram, suggesting multiple ruptures occurred under the ground. It demonstrates that an InSAR observation is advantageous for understanding of the complexity of inland earthquakes. We attempted to detect the spatial extent of liquefaction areas using coherence values. We found several coherence reduction areas, where there are good spatial correlations with the actual liquefaction areas observed field surveyes. It suggests that coherence values can be effective to search liquefaction areas exhaustively.
Sponsorship	IEEE Geosci. Remote Sens. Soc.
Starting Page	540
Ending Page	543
File Size	6940262
Page Count	4
File Format	PDF
ISBN	9784885522789
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2013-09-23
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electronics, Information and Communication Engineers (IEICE)
Subject Keyword	Earthquakes Noise Coherence Cities and towns Orbits Synthetic aperture radar Global Positioning System
Content Type	Text
Resource Type	Article

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