Publications
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Rheology of the lithosphere
During the quadrennial term 1979–1982, major advances have been made in our knowledge of the rheology of the oceanic lithosphere by the skillful combination of experimental and theoretical rock mechanics, seismology and marine geophysics in increasingly sophisticated models for the flexure of the oceanic lithosphere at seamounts and island chains, along transform faults, and at subduction zones. T
Authors
Stephen H. Kirby
Proceedings of Conference XVIII: a workshop on "Continuing actions to reduce losses from earthquakes in the Mississippi Valley area," 24-26 May, 1982, St. Louis, Missouri
The U.S. Geological Survey and the Federal Emergency Management Agency
sponsored a workshop on, "Continuing Actions to Reduce Losses from Earthquakes
in the Mississippi Valley area," in St. Louis, Missouri, on May 24-26, 1982.
Seventy individuals (see Appendix A) representing local, State, and Federal
government; business and industry; and the research community participated in
the three day
Authors
Walter W. Hays, Carla Kitzmiller
Summaries of technical reports, Volume XV
The research results described in the following summaries were submitted by
the investigators on November 15, 1982 and cover the 6-month period from
April 1, 1982 through September 30, 1982. These reports include both work
performed under contracts administered by the Geological Survey and work by
members of the Geological Survey. The report summaries are grouped into the
four major elements of th
Authors
Muriel L. Jacobson, Thelma R. Rodriguez, Wanda H. Seiders
Proceedings of Workshop XIV: earthquake hazards of the Puget Sound region, Washington
This conference, the fourteenth in a series sponsored by the Earthquake
Hazards Reduction Program, was held October 13-15, 1980 at Lake Wilderness,
Washington. The stated purpose of the conference was to assess progress and
the state of knowledge of earthquake hazards in the Puget Sound region of
Washington. The small size of the group and the pleasant informal setting of
the Lake Wilderness Confe
Authors
Robert S. Crosson, Muriel L. Jacobson
A new event detector designed for the Seismic Research Observatories
A new short-period event detector has been implemented on the Seismic Research Observatories. For each signal detected, a printed output gives estimates of the time of onset of the signal, direction of the first break, quality of onset, period and maximum amplitude of the signal, and an estimate of the variability of the background noise. On the SRO system, the new algorithm runs ~2.5x faster than
Authors
James N. Murdock, Charles R. Hutt
Summaries of technical reports, volume XVII
The research results described in the following summaries were submitted by
the investigators on October 20, 1983 and cover the 6-month period from
April 1, 1983 through September 30, 1983. These reports include both work
performed under contracts administered by the Geological Survey and work by
members of the Geological Survey. The report summaries are grouped into the
four major elements o
Authors
Muriel L. Jacobson
Crustal structure of the northern mississippi embayment and a comparison with other continental rift zones
Previous geological and geophysical investigations have suggested that the Mississippi Embayment is the site of a Late Precambrian continental rift that was reactivated in the Mesozoic. New information on the deep structure of the northern Mississippi Embayment, gained through an extensive seismic refraction survey, supports a rifting hypothesis. The data indicate that the crust of the Mississippi
Authors
Walter D. Mooney, M.C. Andrews, A. Ginzburg, D.A. Peters, R. M. Hamilton
Triggering of large earthquakes by magma-chamber inflation, Izu Peninsula (Japan)
A close spatial and temporal association between three aseismic uplift episodes and subsequent large (M ≈ 7) earthquakes on the Izu Peninsula, Japan, suggests a causal relation. Quaternary geology, as well as studies by other workers, indicates a volcanic origin for the observed uplift, and we use a simple inflation model constrained by leveling data to compute the expected increments in normal an
Authors
Wayne R. Thatcher, James C. Savage
Reflection—refraction of general P- and type-I S-waves in elastic and anelastic solids
The reflection and refraction of general (homogeneous or inhomogeneous) plane P and type-I S(SV) body waves incident on plane boundaries are considered for general linear viscoelastic solids. Reflection—refraction laws, physical characteristics of the waves, and the nature of critical angles are examined in detail at welded boundaries and a free surface. General visco-elasticity with no low-loss a
Authors
Roger D. Borcherdt
On the status of in-situ strong ground motion and structural response investigations
No abstract available.
Authors
C. Rojahn, Roger D. Borcherdt
Seismic zonation of the Los Angeles region: A progress report
No abstract available.
Authors
S. T. Algermissen, B. L. Askew, Roger D. Borcherdt, R. H. Campbell, S. H. Clarke, Jack F. Evernden, T. E. Fumal, J. F. Gibbs, H. G. Greene, T. C. Hanks, E. L. Harp, S. H. Hartzell, M. G. Hooper, C.E. Johnson, W. B. Joyner, D. K. Keefer, W. J. Kockelman, D. S. McCulloch, D. M. Perkins, A. M. Rogers, P. A. Spudich, P. C. Thenhaus, J. C. Tinsley, R. C. Wilson, R.F. Yerkes, T. L. Youd, J. I. Ziony
Application of wave field continuation to the inversion of refraction data
Three examples of the inversion of refraction data by downward continuation illustrate the applicability of the method to field data. The first example is a refraction profile from the Mojave Desert, California. These data are spatially aliased and contain clear evidence of lateral inhomogeneity. The inversion in this case produces a broken image in the slowness‐depth domain due to the lateral inh
Authors
G. A. McMechan, Robert W. Clayton, Walter D. Mooney