Wavelet Coherence Analysis of Plasma Beta, Alfven Mach Number, and Magnetosonic Mach Number during Different Geomagnetic Storms

Figure 4

Space weather and geomagnetic indices during the event of 19th–21st March 2021, each day separated by vertical black lines. From the top panel to the bottom panel, the top panel: Alfven Mach number, magnetosonic Mach number, and plasma beta, the second panel: flow pressure and proton density, the third panel: IMF Bz, the fourth panel: SYM-H, the fifth panel: temperature, and the sixth panel: solar wind velocity.