New Insights Into Crustal Deformation of the Indonesia–Australia–New Guinea Collision Zone From a Broad‐Scale Kinematic Model

Abstract

Regions with active tectonic activity like the IANGCZ are often delineated in global plate models as "deforming zones" (Kreemer et al., 2014) or "orogens" (Bird, 2003), for which crustal motion data are excluded from the determination of the otherwise rigid plate motion. Even as early as the 1970s, however, it was recognized that such areas of deformation are often themselves usefully described in terms of discrete "microplates" (e.g., Alvarez et al., 1974;Dewey et al., 1973), relatively small-scale blocks with little internal deformation except near

GRACE and GRACE Follow‐On Gravity Observations of Intermediate‐Depth Earthquakes Contrasted With Those of Shallow Events

“…The local surveyors re‐occupied them recently in year 2023 and the daily mean positions were obtained and analyzed with the historical records (Figure 9b). The east and northward deformation by the 2016/2017 events were difficult to determine from these campaign GPS data sets due to the complex (micro‐) plate tectonics in the region compared to available observations (Zhao et al., 2023). However, the vertical deformation from GPS data featured substantial uplift of 15 cm consistent with observations at both BUK1 and ARO2 between 2014 and 2023 (Figure 9b).…”

Tilting‐Axis Anisotropic Tomography and Subduction Dynamics of the Java‐Banda Arc

“…It is crucial to investigate how its great curvature formed and how the related tectonic evolution in this complex subduction system actually proceeds, which can improve our understanding of mantle dynamics. To date, many studies have been made to investigate the structure and tectonics of SE Asia through various approaches such as geodetic measurements (Hinschberger et al., 2005; S. Zhao et al., 2023), geological surveys (Earle, 2023; Harris, 2006), and seismological investigations (Hua et al., 2023; Richards et al., 2007). However, there are two contrasting hypotheses about the cause of the curved arc: two different slabs subducting toward each other (Cardwell & Isacks, 1978; Das, 2004) or folding of one single slab (Pownall et al., 2016; Spakman & Hall, 2010).…”