Earthquakes Around the World

This animation shows earthquakes that have occurred around the world during the past 8 days. Each 'frame' within the animation shows earthquakes that occurred during one hour. The size and color of the earthquake are determined by the magnitude of the quake:

	Magnitude
	< 2
	2-5
	>5

The diameter of the circle is equal to the magnitude * 100 km

The earthquake information is obtained from the United States Geological Survey (USGS) web site. The USGS earthquake database combines information from a global network (reporting earthquakes with a magnitude > 4) and a national network (reporting earthquakes with a magnitude > 1).

This imagery has been provided by the University of Wisconsin, Hampton University and a grant from NOAA.