Large volcanic eruptions with an ash veil that enters the stratosphere, tend to at the surface.

They tend to explode at the surface. If they produce significant ash, then they are of the continental pyroclastic-type volcanoes of the more viscous andesite-rhyolite-dacite compositions rather than the much less viscous basalt of oceanic volcanoes like those in Hawaii. 

B. to study the spatial patterning of forests and forests fires and plan for better use of fire fighting resources in the u.s.

Although this may be the opposite of what you think i will say it anyway. you were brought into this world for a reason and you still have soo much ahead of you. not everybody has an opportunity of living a great life, but it doesn’t give you a reason to end everything. somebody in the world loves you, and imagine what you would do to them if you left forever.