CHAPTER VII

THE INTERRUPTED CHARACTER OF EARTH MOVEMENTS: EARTHQUAKES AND SEAQUAKES

Nature of earthquake shocks—Seaquakes and seismic sea waves—The grander and the lesser earth movements—Changes in the earth’s surface during earthquakes: faults and fissures—The measure of displacement—Contraction of the earth’s surface during earthquakes—The plan of an earthquake fault—The block movements of the disturbed district—The earth blocks adjusted during the Alaskan earthquake of 1899 67