Geomagnetic avtivity triggered by interplanetary shocks: The shock impact angle as a controlling factor

Denny M Oliveira, University of Maryland Baltimore County, Baltimore, United States, Joachim Raeder, University of New Hampshire, Department of Physics & Astronomy, and Space Science Center, Durham, United States, Bruce Tsurutani, NASA Jet Propulsion Laboratory, Pasadena, CA, United States and Jesper W Gjerloev, Applied Physics Laboratory Johns Hopkins, Laurel, MD, United States