@article{93ae99c088794ad682ea4475ae9e2b15,
title = "Quasi-static slip on the plate boundary associated with the 2003 M8.0 Tokachi-oki and 2004 M7.1 off-Kushiro earthquakes, Japan",
abstract = "We analyzed small repeating earthquakes recorded over a 13-year period and GPS data recorded over an 8-month period to estimate interplate quasi-static slip associated with the 2003 Tokachi-oki earthquake (M8.0) and the 2004 off-Kushiro earthquake (M7.1). The repeating-earthquake analysis revealed that the slip rate near the source region of the Tokachi-oki earthquake was relatively low (< 5 cm/year) prior to the earthquake; however, in the last 3 years leading up to the event, a minor acceleration in slip occurred upon the deeper extension of the coseismic slip area of the earthquake. Repeating-earthquake and GPS data indicate that large amounts of afterslip occurred around the rupture area following the earthquake; the afterslip mainly propagated to the east of the coseismic slip area. We also infer that the occurrence of the 2004 off-Kushiro earthquake, located about 100 km northeast of the epicenter of the Tokachi-oki earthquake, was advanced by the afterslip associated with the Tokachi-oki earthquake.",
keywords = "Afterslip, GPS data analysis, Quasi-static slip, Small repeating earthquake, Subduction tectonics",
author = "Naoki Uchida and Satoshi Yui and Satoshi Miura and Toru Matsuzawa and Akira Hasegawa and Yoshinobu Motoya and Minoru Kasahara",
note = "Funding Information: We thank the staff responsible for maintaining the observation networks of Hokkaido University, Hirosaki University, and Tohoku University for the valuable long-term waveform data and staff of the Geographical Survey Institute of Japan for the continuous GPS data. We also thank Mr. M. Ichiyanagi and Mr. T. Okabe at Hokkaido University for their help with editing waveform data, Dr. Y. Yabe at Tohoku University for providing computer code for calculating changes in coulomb failure stress, Dr. S. Kirby at U.S. Geological Survey for his critical reading of the first draft of the manuscript, two anonymous reviewers and editor Prof. M. Santosh for helpful comments. The inversion code for GPS data analysis was provided by Dr. Y. Yagi at the University of Tsukuba. This work was partially supported by a Ministry of Education, Culture, Sports, Science and Technology Grant-in-Aid for Young Scientists (B), 17740284, 2005, and the Global COE Program, ' Global Education and Research Center for Earth and Planetary Dynamics' at Tohoku University.",
year = "2009",
month = dec,
doi = "10.1016/j.gr.2009.04.002",
language = "English",
volume = "16",
pages = "527--533",
journal = "Gondwana Research",
issn = "1342-937X",
publisher = "Elsevier Inc.",
number = "3-4",
}