Zobrazeno 1 - 10
of 41
pro vyhledávání: '"Stephen F. Obermeier"'
Publikováno v:
Seismological Research Letters. 76:756-771
Seismic hazard assessment in the central United States, and in particular the Wabash Valley seismic zone of Indiana-Illinois, frequently relies on empirical estimates of paleoearthquake magnitudes ( M ). In large part these estimates have been made u
Publikováno v:
Engineering Geology. 76:235-261
A new methodology is proposed for the geotechnical analysis of strength of paleoseismic shaking using liquefaction effects. The proposed method provides recommendations for selection of both individual and regionally located test sites, provides tech
Publikováno v:
Engineering Geology. 76:263-293
The greatest impediments to the widespread acceptance of back-calculated ground motion characteristics from paleoliquefaction studies typically stem from three uncertainties: (1) the significance of changes in the geotechnical properties of post-liqu
Publikováno v:
Engineering Geology. 76:209-234
Discussed in this paper are the factors that control the typical manifestations of liquefaction that are found in continental field settings. The factors are given mainly in terms of the local geologic field situation and the geotechnical properties
Publikováno v:
Seismological Research Letters. 72:46-59
Liquefaction and paleoliquefaction studies are being used increasingly to interpret ground motion parameters ( i.e. , acceleration distribution, earthquake magnitude, and epicentral location) in regions of the world that experience infrequent, but da
Publikováno v:
Bulletin of the Seismological Society of America. 90:876-896
During the past decade, paleoseismic studies done by many researchers in the coastal regions of the Pacific Northwest have shown that regional downdropping and subsequent tsunami inundation occurred in response to a major earthquake along the Cascadi
Publikováno v:
Environmental & Engineering Geoscience. :133-146
Two strong mid-Holocene earthquakes in Illinois have been documented by paleoliquefaction features such as clastic dikes, sills, and detachments of fine-grained sediment that sunk into liquefied sand. At least one paleo-earthquake occurred in central
Autor:
Eric C. Pond, Stephen F. Obermeier
Publikováno v:
Seismological Research Letters. 70:34-58
Three questions always arise when using liquefaction features for paleoseismic analysis: What was the strength of shaking? Where was the source region? And what was the magnitude? Credible answers to these questions have been provided by liquefaction
Autor:
Stephen F. Obermeier
Publikováno v:
Engineering Geology. 50:227-254
Sand- and gravel-filled clastic dikes of seismic liquefaction origin occur throughout much of southern Indiana and Illinois. Nearly all of these dikes originated from prehistoric earthquakes centered in the study area. In this area at least seven and
Publikováno v:
Seismological Research Letters. 68:521-536
Clastic dikes filled with sand and gravel, interpreted to be of seismic liquefaction origin, occur throughout much of the southern halves of Indiana and Illinois. Nearly all of the liquefaction features originated from earthquakes centered in the sou