FACT SHEET ON THE USGS GLOBAL SEISMOGRAPHIC NETWORK
Description
U N D E R S TA N D I N G E A R T H Q UA K E H A Z A R D S A R O U N D T H E W O R L D During the past 35 years,scientists have devel- oped a vast network of seis- mometers that record earthquakes, volcanic erup- tions, and nuclear explo- sions throu...
