. . "8.0 magnitude earthquake" . . "April 1923 Kamchatka earthquake" . . . . . . . "1923-04-13" . . . . "April 1923 Kamchatka earthquake and tsunami" . "36" . . . . "13 April 1923" . . . . . "April 1923 Kamchatka earthquake and tsunami" . . . .