Figure 1: Schematic of foreshock geometry and
spacecraft locations in the plane (the plane that contains
the solar wind velocity and the IMF) for 01-11 UT, May 11.
Figure 2: Simultaneous observed magnetic
field data in the foreshock (red) and in the undisturbed solar wind (blue) on
May 11. The top panels are time series of the magnetic field. The bottom
panels are corresponding power spectra (the sum of power in all three
Figure 3: Dynamic power spectra of Polar
magnetic field data in By GSM component from 07 to 10 UT on May 11 (top) and
May 14 (bottom).
Figure 4: Dynamic power spectra of the
H-component of ground-based magnetic field from IGPP/LANL mid-latitude
stations AFA, LAL, and SGD.