Figure 2
From: On the correlation between solar activity and large earthquakes worldwide
Plots of the Event Relative Rate (see Eq. 2) as a function of the non-dimensional Density Threshold, for: (a) proton flux; (b) proton dynamic pressure; (c) proton velocity; (d) proton density. Different colours refer to different conditions, as explained in Table 2. Squares refer to values which show statistically significant correlation at a significance level 0.00001.
