xShadow zone : The shadow zone is the area of the earth from angular distances of 104 to 140 degrees from a given earthquake that does not receive any direct P waves. The shadow zone results from S waves being stopped entirely by the liquid core and P waves being b
The National Center for Atmospheric Research (NCAR) in Boulder, Colorado has created powerful new computer software that will help scientists study climate change in much more detail than ever before....Read more