Indent corners in collision zones – syntaxes – are fascinating features in continental tectonics. Deformation is 3D, involving crustal thickening, lateral material flow, and transitions from continental collision to oceanic subduction. The latter can nucleate slab-dynamic processes like slab tearing and break-off. These large-scale processes are showcased best in the India-Asia collision zone, in particular around its eastern corner where India, Myanmar and China meet. Between 2019 and 2021 we operated a 30-station seismic network in northern Myanmar as a basis to study the seismotectonics and structure of the Eastern Himalayan syntaxis and Burma subduction-collision zone.