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
Without meaning to, airplanes can cause certain types of clouds to produce snow or rain. When the aircraft climb or descend through mid-level clouds, if the atmospheric conditions are right then the planes...Read more