Erratum to: J Seismol (2011)

DOI 10.1007/s10950-011-9247-6

Unfortunately, equation 7 was incorrectly presented. The corrected version of equation is given below.

$$ \begin{array}{*{20}{c}} {GS = \left\{ {_{{{{(100R)}^{{ \frac{\hbox{$\scriptstyle {\mathbf{1}}$}}{\hbox{$\scriptstyle {\mathbf{2}}$}} }}}}}^R} \right.\quad } \hfill & \begin{gathered} R \leqslant 100\,km \hfill \\ R > 100\,km \hfill \\ \end{gathered} \hfill \\ \end{array} $$