Mount St Helens, Cascade range, Washington state, North West America
1 of 9
When did the eruption happen?
18th May 1980 at 8:32 am
2 of 9
What caused the eruption?
Magnitude 5.1 earthquake caused landslide which in turn triggered the eruption.
3 of 9
What were the primary effects?
57 deaths; 250 homes destroyed; 7000 animals died; 230miles squared of trees were flattened
4 of 9
What were the secondary effects?
Timber industry destroyed; tourist industry declined; cost of damage to farmers machinery and crops totalled $100 million
5 of 9
What were the immediate responses?
Rescuing stranded people; providing shelter for those who lost their homes; giving medical supplies to injured; rescued 198 people.
6 of 9
What were the long-term responses?
Removing ash from roads, rebuilding highway, rebuilding homes, dredging river.
7 of 9
What were the positive impacts?
Area became very fertile years later, tourist industry grew rapidly once facilities were set up due to geographical interest.
8 of 9
What were the negative impacts?
15cm of ash fell causing traffic chaos and airline flights to be cancelled; water produced form melting sno and ice caused mud flows which filled spirit lake and killed 12 million salmon
Comments
No comments have yet been made