Specific features of earth’s free oscillations after deep-focus sea of Okhotsk earthquake of May 24, 2013

Abstract

A description of initial excitation of spheroidal mode 0S2 initiated by the 2013 Sea of Okhotsk earthquake (Mw= 8.3) is presented. It is based on newly revealed fact of standing P-wave origination in the epicenter of the Sea of Okhotsk earthquake and excitation of traveling surface P-waves on the Earths surface by this wave. A new interpretation of the nature of free spheroidal Earths oscillations in case of strong earthquake (М 7,5) is proposed. The spheroidal mode 0S2 is interpreted as combination of standing and traveling P-waves, transferring the Earths strain energy.