Earthquakes in the Light of the New Seismology

acceleration after-shocks alluvia amplitude axis cause centre centrum CHAPITRE Charleston earthquake Charleston Quake coast cracks curves degree density depth dislocation displacement distance district disturbance downthrow earth earth-mass earthquakes elastic energy epicentre epicentrum epifocal eruption fact felt force frequency greater ground Horizontal Pendulum hundred increases indicate inferred instruments intensity investigation Isostasy Japan kilometres kilometres per second Krakatoa less lever means measure miles Milne's minutes Montessus movement normal wave number of quakes observed occur ocean Omori origin oscillation particle period phase portion preliminary tremor Professor Milne proportional ratio records Robert Mallet Rocca di Papa rocks Rossi-Forel scale sea-waves seaquakes Seismes seismic seismic regions seismograph Seismological seismometer sh sl sg shaken shock speed of propagation square square kilometres steady-point surface syzygies tectonic tilting tion Tokio Totaux trace transverse wave velocity vertical motion Vertical Pendulum vibrations Vicentini volcanic volcanic action