Logan Republican | 1916-06-24 | Page 7 | Twin Earthquakes

Twin Earthquakes. Enrthqunkes which consist of two shocks separated by a brief lntervnl of quiet or of two maxima of Intensity nro known ns twin earthquakes. In Great Ilrltuln one in about every twenty twen-ty earthquakes is a twin, and tho strongest shocks experienced In that country belong to this variety. It Is believed that twin earthquakes are duo to Impulses arising from two detached foci, scpnrntcd In different cases from four to more than twenty miles, but lying along tho same fault In tho earth's crust