{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,8]],"date-time":"2026-04-08T03:12:31Z","timestamp":1775617951654,"version":"3.50.1"},"reference-count":0,"publisher":"Society of Exploration Geophysicists","issue":"1","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[1990,1,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>The measurement from borehole sonic data of Q, the acoustic attenuation coefficient of an earth section, can be achieved in three ways: forward modeling (Chuen and Toksoez, 1981), spectral ratios (Gladwin and Stacey, 1974), and inversion (Cheng et al., 1986). The spectral-ratio technique has been applied to real data (Goldberg et al., 1985) but is unstable and not very reliable. Experiments have shown that the spectral-ratio technique applied to waveforms gives Q estimates which are lower than those measured from cores in the laboratory (Goldberg and Zinszner, 1989). We investigate this phenomenon using synthetic and real data.<\/jats:p>","DOI":"10.1190\/1.1442776","type":"journal-article","created":{"date-parts":[[2002,10,11]],"date-time":"2002-10-11T15:09:34Z","timestamp":1034348974000},"page":"97-101","source":"Crossref","is-referenced-by-count":69,"title":["The validity of Q estimates from borehole data using spectral ratios"],"prefix":"10.1190","volume":"55","author":[{"given":"Mark","family":"Sams","sequence":"first","affiliation":[{"name":"Imp. Coll., Dep. Geol., London, United Kingdom"}]},{"given":"David","family":"Goldberg","sequence":"additional","affiliation":[{"name":"Lamont-Doherty Geol. Obs., United States"}]}],"member":"186","published-online":{"date-parts":[[1990,1,1]]},"container-title":["Geophysics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/pubs.geoscienceworld.org\/seg\/geophysics\/article-pdf\/55\/1\/97\/3160301\/97.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/pubs.geoscienceworld.org\/seg\/geophysics\/article-pdf\/55\/1\/97\/3160301\/97.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,12,11]],"date-time":"2025-12-11T15:28:03Z","timestamp":1765466883000},"score":1,"resource":{"primary":{"URL":"https:\/\/pubs.geoscienceworld.org\/geophysics\/article\/55\/1\/97\/72318\/The-validity-of-Q-estimates-from-borehole-data"},"secondary":[{"URL":"http:\/\/geophysics.geoscienceworld.org\/cgi\/doi\/10.1190\/1.1442776","label":"geoscienceworld"}]},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1990,1,1]]},"references-count":0,"journal-issue":{"issue":"1","published-print":{"date-parts":[[1990,1,1]]}},"URL":"https:\/\/doi.org\/10.1190\/1.1442776","relation":{},"ISSN":["1942-2156","0016-8033"],"issn-type":[{"value":"1942-2156","type":"electronic"},{"value":"0016-8033","type":"print"}],"subject":[],"published-other":{"date-parts":[[1990,1,1]]},"published":{"date-parts":[[1990,1,1]]}}}