The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 68
... Earthquakes ( Q.Z. ) An earthquake commonly is described as a sudden in- dividual tremor within the Earth that creates shaking at the surface . Many earthquakes disturb the surface only to a degree observable with sensitive instruments ...
... Earthquakes ( Q.Z. ) An earthquake commonly is described as a sudden in- dividual tremor within the Earth that creates shaking at the surface . Many earthquakes disturb the surface only to a degree observable with sensitive instruments ...
Page 69
Artificial earthquakes . Artificial earthquakes include all quake events that are in some way induced by or re- lated to man's activity . These range from the vibrations produced by machinery and common vehicular traffic to the shocks ...
Artificial earthquakes . Artificial earthquakes include all quake events that are in some way induced by or re- lated to man's activity . These range from the vibrations produced by machinery and common vehicular traffic to the shocks ...
Page 70
... earthquakes are absent , and volcanism is minor or extinct . The local earthquakes are associated with block displacements involving faults of considerable length , the outstanding one being the San Andreas Fault in Cali- fornia . A ...
... earthquakes are absent , and volcanism is minor or extinct . The local earthquakes are associated with block displacements involving faults of considerable length , the outstanding one being the San Andreas Fault in Cali- fornia . A ...
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activity Africa agriculture America became become body called capital caused central centre century changes Christian Church continued core countries cultural demand direction early Earth East Eastern eclipse economic effect established Europe example feet field Figure flow force groups growth important income increase industry internal investment Italy kilometres known labour Lake land later less living magnetic major mantle material means measurements ment metres miles mountains move movement nature North observed occur ocean organization origin Orthodox patriarch percent period planning Pleistocene political population position possible present problems production region relatively remained result rise River rocks social society South species structure surface theory tion trade traditional United West Western