MT. ST. HELENS IS AN ACTIVE VOLCANO

• It is located in the state of Washington

Untitled Slide

MT. ST. HELENS IS A COMPOSITE (STRATO) VOLCANO

MT. ST. HELENS PRODUCED ANDESITIC MAGMA

MT. ST. HELENS LAST ERUPTED IN MAY 18, 1980

• This eruption had high eruption violence
• It blew off some of the mountain

MT. ST. HELENS ERUPTION PRODUCTS

• Mt. St. Helens erupted ash and caused a pyroclastic flow
• A quarter of the eruption was fresh lava in the form of ash
• Ash went 80,000 ft. into the air

HOW TALL IS MT. ST. HELENS

• It was 9,677 ft. before it erupted
• Today it is about 8,365 ft.

HOW WERE PEOPLE AFFECTED BY MT. ST. HELENS

• Some of the areas were covered completely in ash
• Shipping was stopped on the Columbia River and some vessels were stranded
• In eastern Washington 5,000 motorists were stranded
• 2 people died from heart attacks by shoveling the ash

5 INTERESTING FACTS

• Killed 57 people
• Caused ash to land on 11 states
• Caused our coldest summer on record
• The major eruption that we all know was May,18,1980
• It is building a new dome still

HOW DID MT. ST. HELENS GET ITS NAME

• George Vancouver was a explorer who surveyed the area in the 18th century
• He named it after his friend known as lord St. Helens