Floods and Tsunamis
Flooding is extremely dangerous and has the potential to wipe away an
entire city, coastline or area, and cause extensive damage to life and
property. It also has great erosive power and can be extremely
destructive, even if it is a foot high.
A tsunami (pronounced sue-nahm-ee) is a series of huge waves that can
cause great devastation and loss of life when they strike a coast.
Tsunamis are caused by an underwater earthquake, a volcanic eruption,
an sub-marine rockslide, or, more rarely, by an asteroid or meteoroid
crashing into in the water from space. Most tsunamis are caused by
underwater earthquakes, but not all underwater earthquakes cause
tsunamis - an earthquake has to be over about magnitude 6.75 on the
Richter scale for it to cause a tsunami. About 90 percent of all tsunamis
occur in the Pacific Ocean.
Many tsunamis could be detected before they hit land, and the loss of
life could be minimized, with the use of modern technology, including
annaabi.ee 
