RUSSIAN JOURNAL OF EARTH SCIENCES, VOL. 14, ES1002, doi:10.2205/2014ES000536, 2014 Figure 1. Temporal variations in 1876–2012: a – mean annual values of Wolf numbers ($R$, left-hand side scale) and smoothed ones based on 11 values ($R_{\rm sm}$, right-hand side scale); b – summarized annual values (left-hand side scale) and smoothed ones based on 9 values (right-hand side scale) of earthquake energy on the globe; c–d the number of earthquakes per year (left-hand side scale) and for 10 years (right-hand side scale): c – of $M \geq 8$; d – of $M \geq 6.8$; e – of $M\geq 6$. Symbols T1 and T2 on curve b indicate minimal values of seismic energy in a centennial cycle. Copyright 2014 by the Geophysical Center RAS. Generated from LaTeX source by SemTeXML, v.1.2) software package. |