Advances in Geophysics, Vol. 47 by Renata Dmowska

By Renata Dmowska

Advances in Geophysics quantity forty five provides major issues of famous curiosity to the geophysical group. the 1st subject is ice debris within the surroundings. Mathematical descriptions of ice particle shapes, their development premiums, and their impact on cloud improvement are offered. the second one subject is earthquakes and seismological mapping. The authors current their study related to predicting the positioning and depth of earthquakes.

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13. Time dependence of postseismic uplift as deduced from leveling data along Turnagain Arm. In each case the data are fit (in a least squares sense) to an exponential function with time constant, To : Curves A, B, and C refer to the motion of site D73 in Fig. 12. In A, an exponential uplift function is also assumed for the sea level tide gauge site in Anchorage. In B, the observed positions of the tide gauge are used. , constant rate, uplift is assumed for the tide gauge. Curves D, E, F, and G are relative uplifts assuming that the uplifts of the points being considered have the same time constant.

17. The figure shows an intriguing along-strike variation in the crustal deformation, specifically, CRUSTAL DEFORMATION IN THE SOUTHCENTRAL ALASKA 41 Fig. 17. Horizontal crustal velocities as deduced from GPS observations made in the middle and late 1990s on the Kenai Peninsula and surrounding areas (The figure is based on Zweck et al. (2002) and includes data from several research groups). a difference between the direction of motion on the eastern and western sides of the Kenai Peninsula. The velocities on the eastern side were consistent with strain accumulation along a shallow locked plate interface.

The removal of the oceanographic signal resulted in a considerable reduction in the interannual noise in sea-level height at some of the tide gauge locations (Fig. 14). Nevertheless, the residuals show an oscillatory signature over the first few years following the earthquake at Anchorage and, to a lesser extent, Seward. Cohen and Freymueller (2001) suggested that this oscillation might be an artifact of the data. They noted that some of the annual sea-level height averages used by Savage and Plafker (1991) were based on an incomplete record of monthly sea-level heights.

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