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Open Access

Earthquake fault of the 26 May 2006 Yogyakarta earthquake observed by SAR interferometry

  • Takeshi Tsuji12Email author,
  • Katsuya Yamamoto12,
  • Toshifumi Matsuoka12,
  • Yasuhiro Yamada12,
  • Kyosuke Onishi12,
  • Alfian Bahar22,
  • Irwan Meilano22 and
  • Hasanuddin Z. Abidin22
Earth, Planets and Space200961:BF03353189

Received: 1 April 2009

Accepted: 15 July 2009

Published: 7 August 2009


We analyzed synthetic aperture radar interferometry (InSAR) to reveal surface deformation associated with the 26 May 2006 Yogyakarta earthquake, for which the fault location and geometry have not been clearly determined. Our results demonstrate that surface deformation occurred 10 km east of the Opak River fault thought to be the source of the May 2006 event and that the probable causative fault delineated in this study is consistent with aftershock epicenters determined by a temporary seismic network. The trace of the causative fault bends at its southern termination toward the Opak River fault as if it were a splay. Our data demonstrate that another probable slip plane extends across Yogyakarta and that the heavily damaged areas covered by young volcanic deposits may have undergone subsidence during the earthquake.

Key words

May 2006 Yogyakarta earthquakeSAR interferometryfault geometry