**3. Multi-mode radar imaging technology for monitoring earthquake deformation**

Synthetic aperture radar (SAR) multi-mode data can provide a variety of types of information for earthquake research. We take Yushu earthquake, which occurred in Yushu

vegetation information caused by non-geological factors. Finally, according to remote

The overall results of monitoring secondary geological disaster are shown in Figure 3, where the red stands for landslides, blue for debris flows, and green for collapses. As can be seen from the figure, the landslide occurred mainly in Beichuan, Pingwu and Qingchuan counties; debris flow occurred mainly in Wenchuan, Maoxian and Li counties; and collapse occurred mainly in Wenchuan and Beichuan counties. According to statistics, the total disaster area is about 29,000 square kilometers, and the secondary geological disaster area is

sensing image identification of secondary geological disasters, they can be classified.

Fig. 3. Map of secondary geological disasters occurring in the heavily-hit areas of the

Synthetic aperture radar (SAR) multi-mode data can provide a variety of types of information for earthquake research. We take Yushu earthquake, which occurred in Yushu

**3. Multi-mode radar imaging technology for monitoring earthquake** 

**2.4.2 Secondary geological disaster remote sensing monitoring results** 

2,250 square kilometers ( 7.8% of the total).

Wenchuan earthquake

**deformation** 

County, Qinghai Province, China, on April 14, 2010, as the research object and use RADARSAT-2 and ALOS-PALSAR repeat-pass SAR interferometry data to analyze earthquake deformation characteristics.
