Earthquakes in the Light of the New Seismology |
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Page 8
... oscillation and the duration of the quake as a collective event comprising numerous oscillations . Until within a comparatively recent period it has been customary to speak of an earthquake as causing the up- heaval or downthrow of ...
... oscillation and the duration of the quake as a collective event comprising numerous oscillations . Until within a comparatively recent period it has been customary to speak of an earthquake as causing the up- heaval or downthrow of ...
Page 9
... oscillation occupy- ing five or ten minutes as the passengers in midocean are of the rise and fall of the tides . Theoretically there are no assignable limits to the great- ness or smallness of earthquakes . In the direction of small ...
... oscillation occupy- ing five or ten minutes as the passengers in midocean are of the rise and fall of the tides . Theoretically there are no assignable limits to the great- ness or smallness of earthquakes . In the direction of small ...
Page 73
... oscillation to the suspended weight unless the vibra- tions of the point of suspension were slow and of consider- able amplitude . But experience quickly developed two difficulties . If the vibrations were slow and wide they in ...
... oscillation to the suspended weight unless the vibra- tions of the point of suspension were slow and of consider- able amplitude . But experience quickly developed two difficulties . If the vibrations were slow and wide they in ...
Page 82
... oscillations the agreement is very close . On the whole , then , the duplex pendulum seismometer gives us a very fair notion of the movement of the ground during an earthquake , and we are justified in placing con- fidence in its record ...
... oscillations the agreement is very close . On the whole , then , the duplex pendulum seismometer gives us a very fair notion of the movement of the ground during an earthquake , and we are justified in placing con- fidence in its record ...
Page 83
... oscillation , and thereby secure some data for estimating the force exerted , the duration of the entire quake , and the various changes in its phases . There is , however , an element of motion which we have not yet con- sidered , and ...
... oscillation , and thereby secure some data for estimating the force exerted , the duration of the entire quake , and the various changes in its phases . There is , however , an element of motion which we have not yet con- sidered , and ...
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Common terms and phrases
acceleration after-shocks alluvia amplitude Arica 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 estimates fact felt force frequency greater ground Hooke's law Horizontal Pendulum hundred increases indicate inferred instruments intensity investigation Japan kilometres kilometres per second Krakatoa less lever mass 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 ribbon Robert Mallet rocks Rossi-Forel scale sea-waves seaquakes Seismes seismic seismic regions seismograph Seismological seismometer 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
Popular passages
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Page 312 - The Basis of Social Relations. A Study in Ethnic Psychology. By DANIEL G. BRINTON, AM, MD, LL.D., Sc.D., Late Professor of American Archaeology and Linguistics in the University of Pennsylvania ; Author of " History of Primitive Religions," "Races and Peoples," " The American Race,
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Page 167 - Overthrow of movable objects; fall of plaster; ringing of church bells; general panic, without damage to buildings.
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Page 167 - Microseismic shock: recorded by a single seismograph or by seismographs of the same model, but not by several seismographs of different kinds ; the shock felt by an experienced observer.