
Satellite pictures of the Pakistani coast in February (left) and November 2010.
Pakistani fishers reported the new mud volcano in the Arabian Sea in late November, and NASA's Earth Observing-1 satellite snapped a picture of it (above) on January 11. The volcano was not in a satellite picture of the same region taken last February.
According to NASA, mud volcano "islands" have appeared in the Arabian Sea before, and most have washed away within a few months. In fact, the January picture shows tan sediments steaming from the new mud volcano, suggesting it is eroding and will soon vanish.
Mud volcanoes, which can appear on land or underwater, form when underground layers of silt or clay become pressurized either by tectonic activity or by a buildup of hydrocarbon gases.












