RUSSIAN JOURNAL OF EARTH SCIENCES, VOL. 20, ES6008, doi:10.2205/2020ES000724, 2020 Figure 3. Correlation of $a_K$-index values calculated with $K9$ values equal to 500 and 600 nT. Copyright 2020 by the Geophysical Center RAS. Generated from LaTeX source by ELXfinal, v.2.0 software package. |