By Renata Dmowska
Advances in Geophysics quantity forty five provides major themes of famous curiosity to the geophysical group. the 1st subject is ice debris within the surroundings. Mathematical descriptions of ice particle shapes, their progress premiums, and their effect on cloud improvement are awarded. the second one subject is earthquakes and seismological mapping. The authors current their study concerning predicting the site and depth of earthquakes.
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Additional info for Advances in Geophysics, Vol. 47
2001). They were oriented in a north to north– northwest direction relative to interior Alaska with magnitudes reflecting the decrease in crustal velocity with distance from the trench. However, the velocities derived from data collected between 1998 and 2001 were in the opposite direction and resembled those on the western Kenai Peninsula. The change in surface velocities had magnitudes as large as 25 mm/yr and were apparently due to slip on the plate interface at a depth of ,35 km. Freymueller et al.
Freymueller et al. (2000) found consistently greater uplift rates than did Savage et al. (1998). The differences approach 10 mm/yr in some cases. For the most part these differences are due to reference frame issues and seem to have been largely resolved by careful consideration of these coordinate system matters. Recent work on vertical GPS velocities (Chris Larsen, private communication) show that Freymueller et al. (2000) overestimated vertical velocities because they tied their reference frame to North America through site FAIR in Fairbanks rather than defining North America motion through an ensemble of International Terrestrial Reference Frame velocities.
In trying to interpret the uplift observed along the Turnagain Arm, Brown et al. (1977) considered several physical mechanisms: creep on a buried fault, 48 COHEN AND FREYMUELLER viscoelastic flow, strain accumulation on the megathrust due to the continuing convergence between the North America and Pacific Plates, strain accumulation on a subsidiary fault, subsurface magmatic activity, and dilatancy effects. They concluded that the latter two mechanisms did not offer a viable explanation for the observed uplift, but that buried slip, viscoelastic rebound, and strain accumulation on the megathrust were realistic possibilities.