2.5-D surface deformation of M6.1 earthquake near Mt Iwate detected by SARinterferometry

The two-dimensional displacement vector field on the Earth's surface associ ated with a large earthquake near Iwate volcano in Japan, was mapped by com bining satellite radar interferometry images from two different track direc tions. The displacement reveals not only large main ruptures, but details o f many small faults movement of aftershocks and volcanic earthquakes. The d isplacements of the aftershock faults coincide with a stress held reorganiz ed by the main earthquake that accelerated the aftershock fault movements. The displacements mimic the topography, suggesting that repeated movements of the same faults in the Quaternary have led to the presently existing top ography.