Estimation of Near-Surface Loosened Rock Mass Zones in Mountainous Areas by Using Helicopter-Borne and Drone-Borne Electromagnetic Method for Landslide Susceptibility Analysis. - Nonomura, Atsuko; Hasegawa, Shuichi; Jomori, Akira; Okumura, Minoru; Ojyuku, Haruki; Hoshino, Hiroaki; Toyama, Tetsuya; Jomori, Atsuyoshi; Kaneda, Yoshiyuki (Remote Sensing, 2025)