David T Adams (Former Employee)
Science and Products
Filter Total Items: 14
Seismic guided waves trapped in the fault zone of the Landers, California, earthquake of 1992 Seismic guided waves trapped in the fault zone of the Landers, California, earthquake of 1992
A mobile seismic array of seven stations was deployed at 11 sites along the fault trace of the M7.4 Landers earthquake of June 28, 1992, with a maximum offset of 1 km from the trace. We found a distinct wave train with a relatively long period following the S waves that shows up only when both the stations and the events are close to the fault trace. This wave train is interpreted as a...
Authors
Keiiti Aki, David L. Adams, Akiko Hasemi, W.H.K. Lee
CABFAC/USGS, a FORTRAN program for Q-mode factor analysis of stratigraphically ordered samples CABFAC/USGS, a FORTRAN program for Q-mode factor analysis of stratigraphically ordered samples
This program is a revision of the CABFAC program of Kovan and Imbrie (1971) which incorporates the following improvements: each factor is plotted against depth on the printer; samples are ordered stratigraphically by the program, so that input data need not be ordered stratigraphically; an option has been added to transform all variables to zero means before calculating the cosine-theta...
Authors
David P. Adams
Science and Products
Filter Total Items: 14
Seismic guided waves trapped in the fault zone of the Landers, California, earthquake of 1992 Seismic guided waves trapped in the fault zone of the Landers, California, earthquake of 1992
A mobile seismic array of seven stations was deployed at 11 sites along the fault trace of the M7.4 Landers earthquake of June 28, 1992, with a maximum offset of 1 km from the trace. We found a distinct wave train with a relatively long period following the S waves that shows up only when both the stations and the events are close to the fault trace. This wave train is interpreted as a...
Authors
Keiiti Aki, David L. Adams, Akiko Hasemi, W.H.K. Lee
CABFAC/USGS, a FORTRAN program for Q-mode factor analysis of stratigraphically ordered samples CABFAC/USGS, a FORTRAN program for Q-mode factor analysis of stratigraphically ordered samples
This program is a revision of the CABFAC program of Kovan and Imbrie (1971) which incorporates the following improvements: each factor is plotted against depth on the printer; samples are ordered stratigraphically by the program, so that input data need not be ordered stratigraphically; an option has been added to transform all variables to zero means before calculating the cosine-theta...
Authors
David P. Adams