Use the USGS Earthquake Search to find earthquakes with a magnitude of 5.0 or greater that have occurred in the past year. 1  Click the Global (Worldwide) Search link. 2  Obtain the records by selecting Spreadsheet Format (comma-delimited) as the Output File Type. 3  Choose the USGS/NEIC (PDE) 1973 - Present Data Base.
The definition of a jib is an arm that sticks out of a crane, a triangular sail that stays in front of the mast, or an animal that stops and refuses to go back. An example of a jib is the part of a crane that reaches out to grab. An example of a jib is one of the sails on a sailboat.
A jib is  the forward most triangular sail on a ship. Luffing is a nautical term for when the sail flutters because it is pointed straight into the wind instead of catching it. A luffing jib also refers to a type of crane that is used in tight areas, usually in urban environments. This crane can operate so that its boom is able to be maneuvered in smaller areas so that neighboring property owners do not need to be contacted for permission to operate.