Differential energy radiation from two earthquakes in Japan with identical M_w: The Kyushu 1996 and Tottori 2000 earthquakes

We examine two closely located earthquakes in Japan that had identical moment magnitudes M_w but significantly different energy magnitudes M_e. We use teleseismic data from the Global Seismograph Network and strong-motion data from the National Research Institute for Earth Science and Disaster Prevention's K-Net to analyze the 19 October 1996 Kyushu earthquake (M_w 6.7, M_e 6.6) and the 6 October 2000 Tottori earthquake (M_w 6.7, M_e 7.4). To obtain regional estimates of radiated energy E_S we apply a spectral technique to regional (