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Crustal deformation caused by the 2016 Kumamoto earthquake revealed by GEONET / Satoshi Kawamoto in Bulletin of the GeoSpatial Information authority of Japan, vol 64 (December 2016)  

Public [article]  inBulletin of the GeoSpatial Information authority of Japan > vol 64 (December 2016) . - pp 27 - 33 Titre : Crustal deformation caused by the 2016 Kumamoto earthquake revealed by GEONET Type de document : Article/Communication Auteurs : Satoshi Kawamoto, Auteur ; Yohei Hiyama, Auteur ; Reiko Kai, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 27 - 33 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de géodésie spatiale [Termes IGN] déformation de la croute terrestre [Termes IGN] faille géologique [Termes IGN] GeoNet [Termes IGN] Japon [Termes IGN] Kyushu (Japon) [Termes IGN] positionnement par GNSS [Termes IGN] réseau géodésique local [Termes IGN] séisme Résumé : (auteur) GNSS observation over the area of the 2016 Kumamoto Earthquake (April 14-16, 2016) reveals coseismic deformations of over 10 centimeters caused by the two large foreshocks and of ~ 1 meter caused by the mainshock as well as a postseismic deformation of up to a few centimeters. Large displacements are concentrated around Futagawa-Hinagu fault zone which is a known active fault in Kyushu Island. Kinematic positioning results imply the two large foreshocks initiated a rupture on the northern part of the Hinagu fault segment, then a rupture neighboring the southern part of the segment. The postseismic deformations that followed seem to be similar to the pattern of coseismic deformation, however, they are widely distributed. The sequence of earthquakes caused significant distortion in the Japanese geodetic datum around the focal area, but GEONET observation enabled a rapid response. Furthermore, it is believed the observation data provided by GEONET will make a significant contribution to understand the fault property along the active fault zone. Numéro de notice : A2016--077 Affiliation des auteurs : non IGN Thématique : POSITIONNEMENT Nature : Article DOI : sans En ligne : https://www.gsi.go.jp/common/000150876.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84506 [article]

Detection of ground surface deformation caused by the 2016 Kumamoto earthquake by InSAR using ALOS-2 data / Basara Miyahara in Bulletin of the GeoSpatial Information authority of Japan, vol 64 (December 2016)  

Public [article]  inBulletin of the GeoSpatial Information authority of Japan > vol 64 (December 2016) . - pp 21 - 26 Titre : Detection of ground surface deformation caused by the 2016 Kumamoto earthquake by InSAR using ALOS-2 data Type de document : Article/Communication Auteurs : Basara Miyahara, Auteur ; Yuji Miura, Auteur ; Yasuaki Kakiage, Auteur ; et al., Auteur Année de publication : 2016 Article en page(s) : pp 21 - 26 Note générale : bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Traitement d'image radar et applications [Termes IGN] bande L [Termes IGN] déformation de la croute terrestre [Termes IGN] faille géologique [Termes IGN] image ALOS [Termes IGN] image radar moirée [Termes IGN] interferométrie différentielle [Termes IGN] interféromètrie par radar à antenne synthétique [Termes IGN] Japon [Termes IGN] Kyushu (Japon) [Termes IGN] réseau géodésique local [Termes IGN] séisme Résumé : (auteur) SAR interferometry (InSAR) analysis of operational L-band SAR satellite of Japan, ALOS-2, reveals a series of coseismic crustal deformations caused by the 2016 Kumamoto Earthquake (April 14-16, 2016). Large coseismic deformation of over 10 centimeters due to the two large foreshocks and over 2 meters due to the mainshock can be clearly identified on the SAR interferograms as well as postseismic deformation up to a few centimeters. These displacements are concentrated around Futagawa-Hinagu fault zone which is a known active fault in Kyushu Island. 2.5-D displacements, more specifically quasi-east-west and quasi-vertical displacements due to the mainshock are also estimated from two interferograms observed from both east and west directions. The estimated displacements are consistent with those of ground GNSS observations. The sequence of the earthquakes causes significant distortion in the geodetic datum of Japan around the focal area, and thus positions of geodetic control points, which are fundamental infrastructure for implementing the datum needed to be revised as soon as possible. The area of the deformation could be promptly identified from the interferograms, and the control points which needed to be revised were quickly determined from the interferograms without any additional ground observation. Numéro de notice : A2016--076 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans En ligne : https://www.gsi.go.jp/common/000150877.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=84505 [article]