A THEMIS Case Study of Pi2 Pulsations in the Magnetotail and on the Ground Before a Substorm Onset

Yukinaga Miyashita1, Vassilis Angelopoulos2, Yasutaka Hiraki3, Akimasa Ieda1 and Shinobu Machida4, (1)Nagoya University, Institute for Space-Earth Environmental Research, Nagoya, Japan, (2)University of California Los Angeles, Earth, Planetary, and Space Sciences, Los Angeles, CA, United States, (3)University of Electro-Communications, Department of Communication Engineering and Informatics, Chofu, Japan, (4)Nagoya University, ISEE, Nagoya, Japan