Geodetic and geomorphic evaluations of earthquake generation potential of the northern Sumatran fault, Indonesia

Takao Tabei, Fumiaki Kimata, Takeo Ito, Endra Gunawan, Hiroyuki Tsutsumi, Yusaku Ohta, Tadashi Yamashina, Yoshio Soeda, Nazli Ismail, Irwandi Nurdin, Didik Sugiyanto, Irwan Meilano

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

We have conducted geodetic and geomorphic observations in the northernmost part of Sumatra, Indonesia to monitor strain accumulation in the vicinity of the northern Sumatran fault. Evaluation of the earthquake generation potential in this region is highly urgent because of a large fault slip rate, absence of major earthquakes for more than 100 years and recent Coulomb stress increase on the fault due to the 2004 Sumatra-Andaman earthquake (Mw 9:2).We have deployed Aceh GPS Network for the Sumatran Fault System (AGNeSS) since 2005. The data collected have been used for estimating slip/locking distribution of the Sumatran fault and constructing a comprehensive model for postseismic deformation after the 2004 event. Tectonic geomorphic features are also important to reveal long-term slip history of the fault. We have used high-resolution stereo-paired ALOS (Advanced Land Observing Satellite) PRISM (Panchromatic Remote-sensing Instrument for Stereo Mapping) satellite images to map the surface trace of the Sumatran fault and conducted field observations to ensure the trace by geomorphic and geologic evidence. We introduce preliminary results of the fault mapping together with a brief description of the crustal deformation field detected by GPS.

Original languageEnglish
Title of host publicationInternational Symposium on Geodesy for Earthquake and Natural Hazards (GENAH) - Proceedings of the International Symposium on Geodesy for Earthquake and Natural Hazards (GENAH)
EditorsManabu Hashimoto
PublisherSpringer Verlag
Pages21-28
Number of pages8
ISBN (Print)9783319397672
DOIs
Publication statusPublished - 2017
EventProceedings of the International Symposium on Geodesy for Earthquake and Natural Hazards, GENAH 2014 - Matsushima, Japan
Duration: 2014 Jul 222014 Jul 26

Publication series

NameInternational Association of Geodesy Symposia
Volume145
ISSN (Print)0939-9585

Other

OtherProceedings of the International Symposium on Geodesy for Earthquake and Natural Hazards, GENAH 2014
CountryJapan
CityMatsushima
Period14/7/2214/7/26

Keywords

  • ALOS PRISM
  • Earthquake generation potential
  • GPS
  • Geomorphic observation
  • Sumatran fault

ASJC Scopus subject areas

  • Computers in Earth Sciences
  • Geophysics

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