Abstract
Earthquake-triggered secondary geological hazards usually significantly augment the destruction caused by an earthquake due to their rapid impact, long duration and high repeatability. Seismic disaster losses are often exacerbated and can cause substantial difficulties for rescue, relief and post-disaster reconstruction. The quick acquisition of disaster information is important to aid relief efforts in the 72 critical hours after an earthquake occurs. Currently, computer-aided interpretation of remotely sensed imagery of a single time phase plays a central role in information extraction for geological hazards, whereas automated interpretation is relatively limited. Because high-resolution remotely sensed imagery is rich in textures and spatial details of the imaged objects, such as their size, shape and neighborhood relationship, geologic hazard investigations employing such imagery can offer more accurate results. In this paper, a rapid method for earthquake-triggered secondary geological hazard information extraction from high-resolution remotely sensed imagery is proposed and is demonstrated to be a fast and automatic method that uses multiple image features of a hazard.
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