By Renata Dmowska
Advances in Geophysics quantity forty five provides major subject matters of famous curiosity to the geophysical neighborhood. the 1st subject is ice debris within the surroundings. Mathematical descriptions of ice particle shapes, their progress charges, and their impact on cloud improvement are awarded. the second one subject is earthquakes and seismological mapping. The authors current their learn related to predicting the site and depth of earthquakes.
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Extra resources for Advances in Geophysics, Vol. 47
For example, sites located 250 – 375 km from the trench on the Alaska Peninsula move trenchward, a behavior that is once again inconsistent with the model of a locked plate interface. In addition, there is an along-strike variation in velocities of sites on the Pacific coast of Kodiak Island. Neither the Savage et al. (1999) nor Zweck et al. (2002) model allows CRUSTAL DEFORMATION IN THE SOUTHCENTRAL ALASKA 43 Fig. 18. Velocity profiles in the Katmai–Kodiak Island region relative to site Kdr2 (on Kodiak Island) as a function of the distance N328W from the trench.
Large coseismic displacements occurred on the eastern Kenai Peninsula as part of the rupture of the PWS asperity, as previously mentioned. When we discuss the details of deformation modeling later in this article, we will say more about the interpretation of the contemporary crustal movements observed in the vicinity of the Kenai Peninsula. The contemporary crustal deformation across the Aleutian subduction zone near Kodiak has been studied by Savage et al. (1999) using GPS techniques. , 2002).
The velocity decreased to 42 COHEN AND FREYMUELLER ,32 mm/yr near Seward and to ,10 mm/yr at ,300 km from the trench. The exception to the general trend was a relatively low horizontal velocity of about 30 mm/yr at Middleton Island (MIDD). This site is located about 90 km from the trench, presumably over a region where the subducting Pacific Plate is very shallow and not strongly coupled to the overriding North America Plate (MIDD also displayed an atypically large vertical velocity of ,20 mm/yr possibly due to continuous slip on a local fault branching upward from the megathrust).
Advances in Geophysics, Vol. 47 by Renata Dmowska