Utilizing 8K Super Hi-Vision for active fault researches, on the discovery of earthquake faults and surface ruptures in 2016 Kumamoto earthquake in Japan.

Abstract

　 This study clarifies the fact that 8K technology is useful for not only broadcasting but also disaster research especially for active fault research in terms of remote sensing and space information. We define that “8K” is image sensor for saving lives.　 NHK used an 8K small camera in aerial filming of areas along active faults immediately after the 2016 Kumamoto earthquake. As we analyze the 8K videos, undiscovered earthquake faults and ruptures were found, which were reported in NHK’s TV programs. This served as the first utilization of disaster analyses of 8K images.　 Remarkable features of 8K aerial filming as below.

1: We discovered surface ruptures and displacements as small as a few centimeters and fault in the forest from an altitude of 400 meters. “High ground resolution” is 5mm that is 20 times higher than aerial photography of Geospatial Information Authority of Japan.

2: The angles of view of 8K is 4 times wider than 4K and 16 times wider than 2K(HD). Useful for following the continuity and distribution of faults and ruptures.

3: Since ruptures may cause a variety of disasters, there are high expectations for the utilization of 8K images in disaster risk reduction and disaster science.

4: “8K’s oblique bird’s-eye views” provides vertical information that will make it easier to survey collapsed buildings, and its graphics data can be utilized for making “3D models”.