Earthquakes in the Light of the New Seismology |
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Page xii
... Tremors The Krakatoa Eruption Small Relative Energy of Volcanic Quakes — Quakes from Mt. Etna - Possibility of Quakes from Plutonic Subterranean Action Not Manifested on the Surface . - - CHAPTER IV DISLOCATION OR TECTONIC QUAKES - PAGE ...
... Tremors The Krakatoa Eruption Small Relative Energy of Volcanic Quakes — Quakes from Mt. Etna - Possibility of Quakes from Plutonic Subterranean Action Not Manifested on the Surface . - - CHAPTER IV DISLOCATION OR TECTONIC QUAKES - PAGE ...
Page xv
... Tremors - The Following Phases - Dr . Oldham's Researches - Speed of Surface Waves - Speeds of Preliminary Tremors - Dr. Knott's Remarkable Results Method of Determining the Origin of a Distant Earthquake . CHAPTER XIII DEDUCTIONS FROM ...
... Tremors - The Following Phases - Dr . Oldham's Researches - Speed of Surface Waves - Speeds of Preliminary Tremors - Dr. Knott's Remarkable Results Method of Determining the Origin of a Distant Earthquake . CHAPTER XIII DEDUCTIONS FROM ...
Page 3
... tremors is far below . The idea of a centrum , therefore , may be taken with some qualifications , none of which materially affect its validity . It is a locus but not a point . It may be at any depth , of any size , and of any shape ...
... tremors is far below . The idea of a centrum , therefore , may be taken with some qualifications , none of which materially affect its validity . It is a locus but not a point . It may be at any depth , of any size , and of any shape ...
Page 7
... tremors , of a different order . The motions which are seen and felt at the surface are not the original vibratory waves rushing through the solid earth , which the type - theory contemplates , but are secondary movements resulting from ...
... tremors , of a different order . The motions which are seen and felt at the surface are not the original vibratory waves rushing through the solid earth , which the type - theory contemplates , but are secondary movements resulting from ...
Page 9
... mere matter of convenience . Modern research has assumed that below the scale of un- aided sensibility the earth is pervaded with almost constant minute tremors . What portion of them represents the un- NATURE AND DEFINITIONS 9.
... mere matter of convenience . Modern research has assumed that below the scale of un- aided sensibility the earth is pervaded with almost constant minute tremors . What portion of them represents the un- NATURE AND DEFINITIONS 9.
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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 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.