Variations of Seismicity Parameters Connected with Earth Tides

V. A. Saltykov1,2, V. V. Ivanov1

1Kamchatkan State Pedagogical UniversityKamchatkan, 383032,
Petropavlovsk-Kamchatsky, Pogranichnaya street, 4
2Kamchatkan Seismological Department, Geophysical Service,
683006 Petropavlovsk-Kamchatsky, Piip blvd., 9

The influence of earth tides upon seismicity is investigated. Thus the various power levels of seismicity are considered: earthquakes with magnitude M > 2.6. It is shown, that in the time of preparation of three strong Kamchatkan earthquake with Mі7.0 the conformity of weak earthquake moment to fixed values of tidal wave phase is observed during several years. The similar effect is observed in the high-frequency seismic noise (HFSN, amplitude - 10-12- 10-9 m, frequency - first tens Hz) too: the phase of tidal component of the HFSN envelope has stabilised value during several months before strong earthquake.