Active Tectonics and Seismic Potential of Alaska - download pdf or read online

By Jeffrey T. Freymueller, Peter J. Haeussler, Robert L. Wesson, Göran Ekström

ISBN-10: 0875904440

ISBN-13: 9780875904443

ISBN-10: 1118666399

ISBN-13: 9781118666395

Published via the yankee Geophysical Union as a part of the Geophysical Monograph Series.

This multidisciplinary monograph presents the 1st glossy integrative precis all for the main surprising energetic tectonic structures in North America.

Encompassing seismology, tectonics, geology, and geodesy, it comprises papers that summarize the country of information, together with history fabric for these unusual with the sector; deal with worldwide hypotheses utilizing facts from Alaska; and try out vital worldwide hypotheses utilizing facts from this region.

It is equipped round 4 significant themes:

  • subduction and nice earthquakes on the Aleutian Arc,
  • the transition from strike slip to accretion and subduction of the Yakutat microplate,
  • the Denali fault and similar constructions and their position in accommodating everlasting deformation of the overriding plate, and
  • regional integration and large-scale versions and using facts from Alaska to handle very important international questions and hypotheses.

The book's book close to the start of the nationwide technological know-how Foundation's EarthScope venture makes it in particular well timed simply because Alaska is likely to be the least understood region in the EarthScope footprint, and curiosity within the area will be anticipated to upward push with time as extra EarthScope info develop into available.

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Extra resources for Active Tectonics and Seismic Potential of Alaska

Sample text

Bird [1996] also used a finite element mesh on a spherical shell, and used a similar fault geometry and constraining data as Lundgren et al. [1995]. However, Bird varied the shear traction across faults by varying the coefficient of friction of the faults. Various models were run, and were scored based on their predictions of the VLBI baseline rates, fault slip vectors, and principal stress directions. However, although Bird [1996] used the VLBI data, he made no correction for elastic deformation from locked faults.

There is a long segment dominated by creep extending from the Shumagin Islands west to the Fox Islands. The abundant data from the Sanak segment at the western end of the Alaska Peninsula require that the plate interface be creeping almost out to the trench; Freymueller and Beavan [1999] estimated that the maximum allowable width of a locked zone was 35 km, and only if its updip limit was exactly at the trench. Using an updated data set with more precise velocities, Fournier and Freymueller [2007] showed that the downdip limit of any locked zone could be no deeper than 11 km, which makes it likely that there is no locked zone at all in this segment.

The temperature distribution, plate velocity, or the amount of sediment in the trench) is doomed to failure. , 2004]. The locations and extents of the locked regions also correspond to first order to major features of the 20th century earthquake history, which will be discussed further in the next section. , 2002]. , 1996; Suito and Freymueller, submitted manuscript, 2008]. The eastern locked region might be broken into two separate regions, based on the presence of two distinct regions of subsidence separated by a linear zone of essentially zero vertical motion that lies at the extreme western edge of Prince William Sound.

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Active Tectonics and Seismic Potential of Alaska by Jeffrey T. Freymueller, Peter J. Haeussler, Robert L. Wesson, Göran Ekström


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