vol. pp. 2, ,**1 -0+ -02 &’ () * +,-./012304 sar · vol. pp. *e-mail: [email protected]: alos,...

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腆腊 臠膟臝臯膟膢臒臘 腇腂 膗 臔膝膐膕臎膭膤膞臀 腹腄腶 腯臶腌腝膯臮膘臃膿臸腯膻膷腖 臔臬致腣臱臢 膡臦 膍臇臟膳 腹腄腶腑膫腓臷臶膏臧腟腡腫 腾腶腄膈腯臄膲腢臨膉腖腙腣腞臲膮腘腬 腡腏 至臻臕 腔腭腯臶腌腬膘臃膿臸膜膾腑膔臹腕腭腝腒腙腔腟腢腩腫 腞臶腌腙 膘臃膿臸腣臶膩腣腍腚 腯臭腖腙腧腣腢 臔臫臖膎 膑膵膖臢腡腠腣膃腼腶膄膈腱腨 臔臅臌膨腣 腜腌腝腤 膘臃膿臸腢臉臗腖腝腌腡腌臣膼腯臍臙 臱膋腣臑臙腢 膍臇臟膳 腹腄腶腣膘臃膿臸腑膫腓 膱膨腢膚臓腡膓臋腯臭腖腙 膬腮腭腬腩腍腢腡腛腝腒腙 臺腎腥 臻腞腤 臤腢臩臈腖腙 臰臆 臦臧臜自 臞臔臅 腢腩腛腝臈腗腙臔臬致腣臱臢腾腶腄膈腯致臚腢 膶臶腖腙 腹腄腶腣臁膧腯臬 腢膺腘 臐腎腬腙腦腢 膦膹臛腞臵膌腣 腽膈腻膍臇臟膳 腹腄腶腤 膆膁膅 膀膇腷腰腺 腯 膴 膸膥 腵膈腳腞腋腬 腣腹腄腶 膊膎 膠膛臑膓臊腵膈腶腄腐腪臥膽腖腙 膒臏膰臈膿臸 腉腅腊腇 腠腴腔腁腒腆 腛腧腟腥腡腶 腝腢腡腶腈腜腵 腰腦腛腧 腐腙腎腗腗腓腍 腏腙腖腘腓腍腑 腟腥腡腶 腚腤 腔腁腒腈腞腱腝腢腇腋腌腬腩腮腪腨腣腇腭腄腨腯 腳腈腲腫腕腒腁腙 ῌῌ 361 Bull. Earthq. Res. Inst. Univ. Tokyo Vol. pp. * e-mail : [email protected] : ALOS, PALSAR, Noto Hanto earthquake, Di erential Interferometry, Surface displacement JGI, Inc. Aiming to understand surface deformation patterns associated with the Noto Hanto earthquake, di erential interferometry was performed using ALOS PALSAR data acquired on February (before the earthquake) and April, (after the earthquake). Displacement in the line of sight (LOS) of the radar was mapped through processing steps such as generation of single look complex (SLC) image data, registration of two SLCs, refinement of baseline, and phase unwrapping of di erential interferogram. LOS distance after the earthquake was found to decrease in the WNW direction from the Anamizu Notokashima area, and the maximum reduction of cm around Akakami Kitawakisaki area was analyzed, as well as the increase of the LOS distance up to cm in the area of Minazuki through Nishideyama area. Contours of LOS displacement show a pattern like a concentric circle centered several kilometers away to the NW of the Akakami-Kitawakisaki area, which is concordant with the location of the epicenter reported by Japan Meteorological Agency. SAR SAR * SAR SAR Ozawa, ; Tobita, ; Nishimura, ; Tobita, ; Yarai, ; Ozawa, PALSAR PAL- L SAR SAR . * ALOS PALSAR PALSAR SAR * Takumi Onuma* et al., et al., et al., et al., et al., et al., Key words Abstract SAR : SLC Surface Deformation Patterns Associated with the Noto Hanto Earthquake Detected by Satellite SAR Dif- ferential Interferometry SAR 2, ,**1 -0+ -02 ++, **+, + / ,+ # ,**1 # ,- +* ,**1 # /. / +331 +332 ,**+ ,**+ ,**. ,**0 ,**1 - ,/ +3 + +* + , ,**1

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Page 1: Vol. pp. 2, ,**1 -0+ -02 &’ () * +,-./012304 SAR · Vol. pp. *e-mail: onuma@jgi.co.jp: ALOS, PALSAR, Noto Hanto earthquake, Di erential Interferometry, Surface displacement JGI,

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361

Bull. Earthq. Res. Inst.

Univ. Tokyo

Vol. pp.

* e-mail : [email protected]

: ALOS, PALSAR, Noto Hanto earthquake, Di erential Interferometry, Surface displacement

JGI, Inc.

Aiming to understand surface deformation patterns associated with the Noto Hanto

earthquake, di erential interferometry was performed using ALOS PALSAR data acquired on

February (before the earthquake) and April, (after the earthquake). Displacement in the line

of sight (LOS) of the radar was mapped through processing steps such as generation of single look

complex (SLC) image data, registration of two SLCs, refinement of baseline, and phase unwrapping

of di erential interferogram. LOS distance after the earthquake was found to decrease in the WNW

direction from the Anamizu Notokashima area, and the maximum reduction of cm around

Akakami Kitawakisaki area was analyzed, as well as the increase of the LOS distance up to cm

in the area of Minazuki through Nishideyama area. Contours of LOS displacement show a pattern

like a concentric circle centered several kilometers away to the NW of the Akakami-Kitawakisaki

area, which is concordant with the location of the epicenter reported by Japan Meteorological

Agency.

SAR

SAR *

SAR

SAR

Ozawa, ;

Tobita, ; Nishimura, ; Tobita,

; Yarai, ; Ozawa,

PALSAR PAL-

L SAR SAR . *

ALOS PALSAR PALSAR SAR

*

Takumi Onuma*

et al.,

et al., et al., et

al., et al., et al.,

Key words

Abstract

SAR

: SLC

Surface Deformation Patterns Associated with the

Noto Hanto Earthquake Detected by Satellite SAR Dif-

ferential Interferometry

SAR

2, ,**1 -0+ -02

++, **+, + / ,+

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+* ,**1

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Page 2: Vol. pp. 2, ,**1 -0+ -02 &’ () * +,-./012304 SAR · Vol. pp. *e-mail: onuma@jgi.co.jp: ALOS, PALSAR, Noto Hanto earthquake, Di erential Interferometry, Surface displacement JGI,

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Table . List of PALSAR data used in the study.

Fig. . Doppler frequency change of PALSAR data acquired on February, .

GAMMA

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Fig. . Range spectrum of PALSAR data acquired on February, and of typical ENVISAT ASAR data.

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Page 5: Vol. pp. 2, ,**1 -0+ -02 &’ () * +,-./012304 SAR · Vol. pp. *e-mail: onuma@jgi.co.jp: ALOS, PALSAR, Noto Hanto earthquake, Di erential Interferometry, Surface displacement JGI,

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Page 6: Vol. pp. 2, ,**1 -0+ -02 &’ () * +,-./012304 SAR · Vol. pp. *e-mail: onuma@jgi.co.jp: ALOS, PALSAR, Noto Hanto earthquake, Di erential Interferometry, Surface displacement JGI,

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Constantini, M., , A novel phase unwrapping method

based on network programming. IEEE

, , .

Constantini, M. and P.A. Rosen, , A generalized phase

unwrapping approach for sparse data. Proceedings of

IGARSS ’ , Hamburg, June July, pp. .

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, .

gawa, T. Sagiya and T. Tada, , The M . Earth-

quake triggered by volcanic inflation of Iwate volcano,

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Ozawa, S., M. Murakami, S. Fujiwara and M. Tobita, ,wrap un-Synthetic Aperture Radar Interferogram of thewrapKobe Earthquake and its Geodetic Inversion,

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mation Associated with the West O Fukuoka Pre-

fecture Earthquake Derived from ENVISAT/InSAR and

Ozawa, T., S. Nishimura and H. Ohkura, , Crustal Defor- wara and P.A. Rosen, , -D surface deformation of

the Usu eruption measured by matching of SAR

images, , .

Fault-slip Modeling, Yarai, H., T. Ozawa, T. Nishimura, T. Tobita and T. Imakiire,

, . , Crustal deformation associated with the northern

Tobita, M., S. Fujiwara, S. Ozawa, P.A. Rosen, E. J. Fielding, Miyagi earthquake detected by RADARSAT- and EN-

C.L. Werner, M. Murakami, H. Nakagawa, K. Nitta and

M. Murakami, , Deformation of the North Sak- .

halin earthquake detected by JERS- /SAR interfero- Received February ,

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Tobita, M., M. Murakami, H. Nakagawa, H. Yarai, S. Fuji-

Earth Planets Space,

Geophys. Res. Lett.,Report of the National Research In-

stitute for Earth Science and Disaster Prevention,

Earth, Planets and Space,

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