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Author Topic: Quake & Volcano Resistant homes/buildings  (Read 2557 times)

Quake & Volcano Resistant homes/buildings
« on: May 22, 2005, 07:37:57 AM »

This is to start a discussion regarding quake and volcano resistant homes/buildings, the types of buildings that might be necessary in the future for a scenario like quakes along the USA/Canada/Mexico Pacific coast when volcanos also are covering the area with ash.

The Rocky Mountains/Great Plains areas East to the Atlantic Ocean also have volcanos and a history of earthquakes combined with prevailing winds from the West.

The two problems of quakes and volcanos might occur at the same time so they also might be addressed together.

History has some examples for study.  MtStHelens was pretty far from most buildings but the wet ash was from the Pacific coast into Idaho and Montana.  

However, other volcanos have some very clear records.  Mt Vesuvius in 79AD and Pinatubo in the 1990s were NOT far from cities/towns/homes/buildings.  Ash from Mt Pinatubo was FEET thick at Clark Air Force Base.  The volcano created it's own donut shaped thunderstorms air circulation also.  
Around the hot air and ash rising through the middle of the donut like circulation was extremely cold high altitude air brought down to ground level and mixed with warm moist near-ground-level tropical air which then condensed on the ash.
The net effect was mud falling from the sky for many miles around the mountain. The ash-mud collected on roofs and collapsed the structures.
The ash-mud also ran downhill so rivers were created which had the consistency of wet concrete.
A portion of the downhill flowing ash-mud eventually collected in and filled Subic Bay, making the bay much shallower for navigation by ships.
Cubi Point Air Base was farther from Mount Pinatubo than Clark Air Base so the ash-mud from the sky was less thick on roofs and ground at Cubi Point.  Buldozers and graders were able to clear the runways.

A reasonable presumption is that while North American volcanos are erupting ash, some large earthquakes could occur at the same time.  Often earthquakes precede and follow volcano eruptions.
Another reasonable presumption is that the unavoidable damage caused by quakes/volcano(s) would disrupt electricity supply and natural gas supply.  This would encourage use of alternative energy supply methods such as passive solar.
Another reasonable presumption is that valley bottom structures would be prone to destruction by wet ash-mud flows.  This would encourage moving building sites away from valley bottoms.
What say ye?
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