Suspected Stepped-Leader X-ray Bursts Observed Preceding a Terrestrial Gamma-Ray Flash on Mt. Fuji, Japan

John Ortberg1, David Miles Smith1, Jeffrey Michael Chaffin1, Masashi Kamogawa2, Tomoyuki Suzuki3, Daohong Wang4, Ting Wu5, Namiko Sakurai6 and Jeff Lapierre7, (1)University of California Santa Cruz, Department of Physics and Santa Cruz Institute for Particle Physics, Santa Cruz, CA, United States, (2)Tokyo Gakugei Univ, Tokyo, Japan, (3)JASDF, Fuchu, Tokyo, Japan, (4)Gifu University, Gifu, Japan, (5)Osaka University, Suita, Japan, (6)National Research Institute for Earth Science and Disaster Resilience, Storm, Flood and Landslide Research Division, Tsukuba, Japan, (7)Earth Networks Inc., Germantown, United States