Page 3 - Save Energy
P. 3
NATURAL CAUSES OF NATURAL HAZARDS
tsunami
Undersea earthquakes
Underwater volcanic eruptions
Underwater landslides
Asteroid or meteor impact
Fault movements under the ocean floor
The majority of earthquakes are caused by a
sudden movement along Earth's fault lines. These earthquake
are called tectonic earthquakes
Less powerful earthquakes may be caused by volcanic
eruptions or earth subsidence (collapse quakes)
tornado Supercell thunderstorms
Convergence of air masses
Changes in wind direction and speed
Downdrafts and updrafts
Atmospheric instability
Dryline and cold front interactions
Heavy rainfall flooding
Rapid snowmelt
Coastal and storm surge
Dam or levee failure
Tsunamis or volcanic eruptions
drought Natural climate change
Weather events such as El Nino
and La Nina weather events
Reduced moisture sources, e.g., rivers and lakes
preventing evaporation
Long-lasting high pressure systems
