Real-Time Solar Storm Onset Determination at Lagrange Point 1 (L1) Based on an Optimized Effective Pressure Parameter

Kurzfassung

The solar storm detection parameter, the effective pressure, which is based on a combination of solar wind velocity and the southward component of the interplanetary magnetic field is investigated with data covering two solar cycles to estimate an optimal configuration for its storm detection capabilities. The implementation of the optimized parameter is able to accurately identify the onset time of solar storms with a false alarm rate of less than 2%, which provides a significant better performance than, for example, the proton pressure and has a significant lead time to geomagnetic indices. The effective pressure is further discussed with a selected reference solar storm, showing its potential for storm onset identification.