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The crustal deformation and fault model of the 2011 off the Pacific coast of Tohoku earthquake / T. Imakiire in Bulletin of the GeoSpatial Information authority of Japan, vol 59 (December 2011)  

Public [article]  inBulletin of the GeoSpatial Information authority of Japan > vol 59 (December 2011) . - pp 21 - 30 Titre : The crustal deformation and fault model of the 2011 off the Pacific coast of Tohoku earthquake Type de document : Article/Communication Auteurs : T. Imakiire, Auteur ; T. Kobayashi, Auteur Année de publication : 2011 Article en page(s) : pp 21 - 30 Note générale : Bibliographie Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] déformation de la croute terrestre [Termes IGN] faille géologique [Termes IGN] Geonetwork [Termes IGN] image ALOS-PALSAR [Termes IGN] interféromètrie par radar à antenne synthétique [Termes IGN] séisme [Termes IGN] Tohoku (Japon) Résumé : (Auteur) This paper presents an overview of crustal deformation caused by the 2011 off the Pacific coast of Tohoku Earthquake, detected by GEONET (GPS Earth Observation Network), the GPS continuous observation system operated by the GSI, and by interferometric SAR (InSAR) analysis using ALOS/PALSAR data. We found that a very wide area of the Japanese Islands, from Hokakido to the Kinki district, was remarkably affected by the crustal deformation caused by the mainshock of the Tohoku Earthquake. We estimated the geometry of the seismogenic fault of the earthquake, as well as the slip model for the plate boundary between the Pacific plate and the North American plate, from the crustal deformation data obtained from GEONET. The fault is estimated to be longer than 400 km, stretching from off Iwate Prefecture in the north to off Ibaraki Prefecture in the south. The largest slip estimate for the plate boundary is more than 56 m in the off-Miyagi region near the Japan Trench. Postseismic crustal deformation is also observed by GEONET, indicating that slow postseismic slip is ongoing along the plate boundary around the main fault zone. Additionally, we detected clear coseismic signals associated with induced inland earthquakes in the Fukushima-Hamadori area from InSAR analysis. The InSAR results show obvious displacement discontinuities, suggesting that rather shallow ruptures occurred. In particular, for the Mj 7.0 event on April 11, the observed displacement boundaries correspond to earthquake surface ruptures that appeared just along the Idosawa and Yunotake faults. Numéro de notice : A2011-551 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article DOI : sans En ligne : https://www.gsi.go.jp/common/000065834.pdf Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=31445 [article]