Co-seismic offsets due to two earthquakes (M w 6.1) along the Sumatran fault system derived from GNSS measurements - Ito, Takeo; Gunawan, Endra; Kimata, Fumiaki; Tabei, Takao; Meilano, Irwan; Agustan; Ohta, Yusaku; Ismail, Nazli; Nurdin, Irwandi; Sugiyanto, Didik (Earth, Planets and Space, 2016)