fig1a.htm

Figure 1a. Time variations of solar wind and IMF parameters, beginning from 4 days prior to the key day (day 0), which corresponds to the commencement of a sequence of four consecutive quiet days with Ap le 4, and up to 4 days after the termination of the sequence of quiet intervals. The label sig. before the variable indicates the hourly variability in the parameter, as reported in the OMNI tape for the period 1963 to July 1998. The units are km s-1 for solar wind velocity and its variability, n cm3 for density, and nT for all other parameters (B, its components, and their variability).


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