From: Subject: Abstract: EPS in press Date: Mon, 22 Nov 2010 14:04:20 +0100 MIME-Version: 1.0 Content-Type: multipart/related; type="text/html"; boundary="----=_NextPart_000_0000_01CB8A4E.28F220B0" X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5931 This is a multi-part message in MIME format. ------=_NextPart_000_0000_01CB8A4E.28F220B0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Content-Location: http://www.terrapub.co.jp/journals/EPS/abstract/inpress/200905002.html Abstract: EPS in press 3DTERRAPUB=20 3D"Earth,=20
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Earth Planets Space,=20 doi:10.5047/eps.2009.05.002, in press

The Mw 7.9, 12 May 2008 Sichuan earthquake rupture = measured by sub-pixel correlation of ALOS PALSAR amplitude images

Marcello de Michele1, Daniel Raucoules1, = C=E9cile=20 Lasserre2, Erwan Pathier2, Yann = Klinger3,=20 J=E9r=F4me Van Der Woerd4, Julia de Sigoyer5, and = Xiwei=20 Xu6=20

1French Geological Survey (BRGM), Land Use Planning and = Natural=20 Risks Division, Orl=E9ans, France
2Laboratoire de = G=E9ophysique=20 Interne et Tectonophysique, CNRS, Universit=E9 Joseph Fourier, Grenoble, = France
3Institut de Physique du Globe de Paris, = Laboratoire de=20 Tectonique, Paris, France
4Institut de Physique du Globe,=20 Strasbourg, France
5Ecole Normale Sup=E9rieure, = Laboratoire de=20 G=E9ologie, Paris, France
6China Earthquake = Administration, Institue=20 of Geology, Beijing, China=20

(Received October 9, 2008; Revised April 20, 2009; Accepted May 23, = 2009)=20

Abstract: PALSAR L-band spaceborne Synthetic Aperture Radar = (SAR)=20 amplitude images are used to map the Sichuan earthquake rupture (China,=20 Mw 7.9, 12 May 2008) and to identify the faults = activated by=20 the earthquake. A sub-pixel correlation method is used to retrieve the = coseismic=20 displacement field projected into the line of sight of the satellite and = the=20 horizontal along-track direction, and to map the surface rupture. The = earthquake=20 broke ∼ 270 km of the Beichuan fault and ∼ 70 km of the = Guanxian fault, with a=20 complex thrust-dextral slip mechanism. Along the southwestern part of = the=20 rupture, slip seems to be partitioned into a dextral-dominant component = on the=20 Beichuan fault and a thrust-dominant component on the Guanxian fault. = Dextral=20 slip may also be dominant at the northeastern tip of the Beichuan = ruptured=20 fault. Coseismic surface displacements reach on average 3 to 4 m in both = measured directions. The SAR rupture mapping has proven complementary to = field=20 studies extending the zone of co-seismic displacements and identifying = other=20 possible co-seismic rupture strands.
Key words: Sichuan, = earthquake,=20 rupture, PALSAR, amplitude offsets.=20

Corresponding author E-mail: m.demichele@brgm.fr=20

[PDF=20 manuscript] (PDF 1.2 MB)=20

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