摘要：We present a long-term slow slip event from 1996 to 1997 in the Kii Channel along the Nankai Trough in southwestern Japan that has not been reported previously.The long-term slow slip event had a moment magnitude Mw 6.7 and a duration of 1 to 1.5 years.The magnitude of the event was smaller than those of the Tokai ( Mw 7.1) and the Bungo Channel ( Mw 7.0 to 7.1) events along the Nankai Trough.The slip was located slightly shallower than the depth of the low-frequency earthquakes around the Kii Channel.Long-term slow slips have been identified in various regions along the Nankai Trough, except in the Kii Peninsula.Unveiling the history of long-term slow slips is expected to contribute to an understanding of plate boundary characteristics as well as to the prediction of large earthquakes along the Nankai Trough.
