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POLARIS (seismology) : ウィキペディア英語版 | POLARIS (seismology)
POLARIS was an underground experiment to observe seismic signals at depth in very hard rock. It was carried out at SNOLAB, and underground physics laboratory, in Sudbury, Ontario.〔(SNOLAB presentation )〕 〔 (Quantumday.com article ) 〕 In addition to academic research, the data generated in the POLARIS experiment was used by the Canadian National Data Centre (CNDC) for earthquake, and nuclear explosion (see Partial Nuclear Test Ban Treaty) monitoring. 〔 (CNDC overview ) 〕 ==Background== SNOlab is an underground physics lab situated deep in the Creighton Mine, a 2km deep Nickel mine operated by the Vale Limited. 〔 Canadian & American Mines Handbook—75th Edition. Toronto, Ontario: Business Information Group. 2006. p. 493. ISBN 0-919336-65-5. ISSN 171-4042.〕 The mine is situated in the Sudbury Basin: a large impact crater on the Canadian shield.
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