Igor Petrovich Dobrovolsky

Estimation of the size of earthquake preparation zones [pdf] | 地震準備地域の大きさの推定 | I. P. Dobrovolsky

Let us assume that the zone of effective manifestation of the precursor deformations is a circle
with the centre in the epicentre of the preparing earthquake. The radius of this circle called
ρ ＝ 10 0.43M km,
where M is the magnitude. It was shown that the precursors of other physical nature fall into this circle.

August 10, 2007 marks the 75th anniversary of the birth of the chief scientific officer of the Coordinating Center Looking Doctor of Physical and Mathematical Sciences Igor Petrovich Dobrovolsky

Source: http://old.ifz.ru/old/jubilee_r.html
Books
  • The theory of tectonic earthquake preparation (1991)
  • The mathematical theory of training and prediction of tectonic earthquake (2009)