C. G. Bufe
M.D. Zirbes
S.A. Sipkin
2003
<p id="" class="svArticle section clear">This paper is the 12th in a series published yearly containing moment-tensor solutions computed at the US Geological Survey using an algorithm based on the theory of optimal filter design (<a id="bBIB3" class="intra_ref" href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB3" data-mce-href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB3">Sipkin, 1982</a> and <a id="bBIB5" class="intra_ref" href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB5" data-mce-href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB5">Sipkin, 1986b</a>). An inversion has been attempted for all earthquakes with a magnitude, <i>m</i><sub>b</sub> or <i>M</i><sub>S</sub>, of 5.5 or greater. Previous listings include solutions for earthquakes that occurred from 1981 to 2000 (<span id="bBIB5"><a id="ancbBIB5" class="intra_ref" href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB5" data-mce-href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB5">Sipkin, 1986b</a></span>; <a id="bBIB6" class="intra_ref" href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB6" data-mce-href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB6">Sipkin and Needham, 1989</a>, <a id="bBIB7" class="intra_ref" href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB7" data-mce-href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB7">Sipkin and Needham, 1991</a>, <a id="bBIB8" class="intra_ref" href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB8" data-mce-href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB8">Sipkin and Needham, 1992</a>, <a id="bBIB9" class="intra_ref" href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB9" data-mce-href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB9">Sipkin and Needham, 1993</a>, <a id="bBIB10" class="intra_ref" href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB10" data-mce-href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB10">Sipkin and Needham, 1994a</a> and <a id="bBIB11" class="intra_ref" href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB11" data-mce-href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB11">Sipkin and Needham, 1994b</a>; <a id="bBIB12" class="intra_ref" href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB12" data-mce-href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB12">Sipkin and Zirbes, 1996</a> and <a id="bBIB13" class="intra_ref" href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB13" data-mce-href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB13">Sipkin and Zirbes, 1997</a>; <a id="bBIB14" class="intra_ref" href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB14" data-mce-href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB14">Sipkin et al., 1998</a>, <a id="bBIB15" class="intra_ref" href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB15" data-mce-href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB15">Sipkin et al., 1999</a>, <a id="bBIB16" class="intra_ref" href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB16" data-mce-href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB16">Sipkin et al., 2000a</a>, <a id="bBIB17" class="intra_ref" href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB17" data-mce-href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB17">Sipkin et al., 2000b</a> and <a id="bBIB18" class="intra_ref" href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB18" data-mce-href="http://www.sciencedirect.com/science/article/pii/S0031920103000621#BIB18">Sipkin et al., 2002</a>).</p><p id="" class="svArticle section clear">The entire USGS moment-tensor catalog can be obtained via anonymous FTP at <span id="" class="interref" data-locatortype="ftp" data-locatorkey="//ghtftp.cr.usgs.gov">ftp://ghtftp.cr.usgs.gov</span>. After logging on, change directory to “momten”. This directory contains two compressed ASCII files that contain the finalized solutions, “mt.lis.Z” and “fmech.lis.Z”. “mt.lis.Z” contains the elements of the moment tensors along with detailed event information; “fmech.lis.Z” contains the decompositions into the principal axes and best double-couples. The fast moment-tensor solutions for more recent events that have not yet been finalized and added to the catalog, are gathered by month in the files “jan01.lis.Z”, etc. “fmech.doc.Z” describes the various fields.</p>
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10.1016/S0031-9201(03)00062-1
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Moment-tensor solutions estimated using optimal filter theory: Global seismicity, 2001
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