Friday, July 30, 2010

Sunset on the sea

I am Kai Gao, a Ph.D. graduate student from the Department of Geology and Geophysics at Texas A&M University. I joined TAMU G&G last August and now I am working with Dr. Gibson on exploration seismology. My current research is mainly about the velocity-confining pressure relationship for cracked rocks. Basically, I am developing a set of equations describing how the P- and S-wave velocities change of different cracked rocks under confiniing pressure, and do corresponding cracks parameters (e.g,, crack density, matrix velocity, etc.) inversions if given experiment data of pressure-velocity. According to the current results I got, this relation is neither linear nor simple nonlinear, it can be approximated by power-law-based square-root relation. Anyway, perhaps you can see my results someday in some journal. I also hope that will not be too far away.

Shifting to the Shatsky cruise, we have finished dropping OBSs on predesigned sites across Shatsky Rise and now we are implementing over 1000 air gun shootings along the first line (in fact it includes a long seismic line nearly NW-SE and a short line perpendicular with it), and we expect to finish the shooting tomorrow, and then Langseth will utilize streamers along with air guns to explore several other seismic lines over different regions of Shatsky Rise. It is exciting that this is the first time that human beings can detect deeply inside this supervolcano other than merely understanding the shallow sediments. See a detailed report from Oceanography TAMU.

This vast ocean is never mean to bequeath its pulchritude in the endless time. Every moment is its never-returning past, every moment is its ever-extending verve to the future, even when the sunset is coming and try to cover the ocean with black night. The sunset itself is an evanesce, while it is an undying dazzling impression for me, just like an opera performed by the sun and our earth.

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