Fig. 12

Landslides and InSAR coherence analysis in a mountainous area. a Landslides interpreted by aerial photographs (dark blue; GSI 2018b) on shaded relief map; location shown in Fig. 11. Pink indicates areas where the normalized phase noise deviation was small enough for the phase unwrapping in Figs. 5 and 6. Black arrows indicated the location of a large landslide that caused the collapse of many houses. b Aerial photograph from after the earthquake. Black arrows are the same as in a. c Normalized coherence change of SAR image pairs 1 and 3. Gray shading indicates masked areas where the coherence before the earthquake was < 0.2. Black arrows are the same as in a. d Normalized coherence change of SAR image pairs 2 and 4. Gray shading indicates masked areas where the coherence before the earthquake was < 0.2. Black arrows are the same as in a