Destructive Plate Margin - oceanic sub
ducts beneath less dense continental
plate. Conservative - two plates rub
along slide each other causing friction
and pressure. Constructive - two plates
pull apart from each other causing
magma to rise
Mount St. Helens- May
18th 19080
S.T EFFECTS - 57 PEOPLE DIED,
DESTROYED HOMES AND
BUSINESSES, 185 MILES OF
ROADS AND RAILWAYS
DESTROYED AS WELL AS 27
BRIDGES
LONG TERM EFFECTS - MICE
AND CHIPMUNKS INCREASE AS
PREDATORS KILLED, GOPHERS
MIXED WITH ASH SO SOIL
MORE FERTILE
S.T RESPONSES -
HELICOPTERS TO SEARCH FOR
PEOPLE, EMERGENCY
TREATMENT, AIRPORTS
CLOSED, RIVERS CHECKED
FOR DEBRIS
L.T RESPONSES -
NATIONAL PARK IN
1982, SAFETY
CHECKED, ROADS
REBUILT
YELLOWSTONE
DESTROY 10,000KM3 OF LAND,
KILL 87000 PEOPLE, ASH TO
COVER 1000KM DISTANCE,
PYROCLASTIC FLOW, CLIMATE
CHANGE, FOOD SHORTAGE
KOBE JAPAN, 17th Jan,
1996, 7.2
S.T EFFECTS - 6343
DEAD, 40,000 INJURED
L.T EFFECTS - 300,000
HOMELESS, 2 MILLION
WITHOUT E&W, $220 BILLION
DAMAGE
S.T.RESPONSES - 7-11 PROVIDE
ESSENTIALS, PEOPLE LOOKED
FOR RELATIVES, MOTEROLA
MAINTAINED CONNECTION FREE
CHARGE
L.T RESPONSES -
BUILDING CODE 1981,
BUILDINGS FURTHER
APART, LESS DOMINO
EFFECT