A comprehensive model of postseismic deformation of the 2004 Sumatra–Andaman earthquake deduced from GPS observations in northern Sumatra

Long aseismic slip duration of the 2006 Java tsunami earthquake based on GPS data

“…Our results regarding decay time in the order of hundreds of days as observed by 8 years' data after the event suggest that other physical mechanisms of postseismic deformations should be taken into account (Gunawan et al 2014). In a much longer time period, the contribution of viscoelastic relaxation in the asthenosphere becomes compulsory as afterslip tends to decrease with time.…”

Estimation of postseismic deformation parameters from continuous GPS data in northern Sumatra after the 2004 Sumatra-Andaman earthquake

“…Time series of ACEH was published by previous studies (Ito et al 2012;Gunawan et al 2014), so we used their result for further analysis. For other sites, we performed GPS data processing using GAMIT 10.5 to obtain daily solutions (Herring et al 2010).…”

“…Previous studies suggested that there are ongoing postseismic activities due to the 2004 SumatraAndaman earthquake with the movement of 5-15 cm per year observed in the Andaman Islands (e.g., Som et al 2011Som et al , 2014, and also in Thailand (e.g., Panet et al 2010). Furthermore, Gunawan et al (2014) suggested that postseismic deformation in the long-term period after earthquake occurrences corresponds to viscous flow in the asthenosphere. They showed that contribution of afterslip during one year periods from end of 2005 to end of 2006 corresponds to *60% of GPS data displacements.…”

“…For instance, the cooperation between the universities from Indonesia and Japan resulted in the project of global positioning system (GPS) observation spread across several regions in northern Sumatra. This GPS network named AGNeSS (Aceh GPS Network for the Sumatran Fault System) (Ito et al 2012;Gunawan et al 2014). Previous studies suggested that there are ongoing postseismic activities due to the 2004 SumatraAndaman earthquake with the movement of 5-15 cm per year observed in the Andaman Islands (e.g., Som et al 2011Som et al , 2014, and also in Thailand (e.g., Panet et al 2010).…”

Co-seismic offsets due to two earthquakes (M w 6.1) along the Sumatran fault system derived from GNSS measurements

“…In March 2005, we established the Aceh GNSS Network for the Sumatran Fault System (AGNeSS) in the northwestern part of the Sumatran island (Ito et al 2012;Gunawan et al 2014). The AGNeSS consisted of seven continuous and 17 campaign GNSS sites spanning the northwestern segment of the GSF system.…”