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《Earthquake》 1989-06
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TILT CHANGE ACCOMPANYING SLOW FRACTURE PROCESS IN LARGE SCALE TEST SAMPLE OF GRANODIORITE

Luo RongxiangInstitute of Seismology, SSBYe ChuanqianQuanzhou Seismic Station Scismological Bureau of Fujian Province  
This paper describes a rock sample dilation-fracture test and accompanying tilt observa-tion on the sample that carried out in Xichang Central Station of Sichuan province in summer,1986. Anomalous tilt variations have observed before the major fracture of the rock sample,and a tilt step has appeared during the fracture that varify some practically recorded pheno-mena of ground tilt as seismic precursors and coseismic tilt steps, problems concerning "scaleeffects" of the test are also discussed.
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