Some solutions? (Score 1)

A long shot for sure, but given the consequences, a few simple steps could help. Short Term - Some university or government agency should scatter a handful of solar-powered GPS receivers over the slope, trasmitting short-range to an satellite uplink on a stable part of the island. If they move, the agengy would sound the alarm to other agencies, and have satellite, seismic, etc. corroboration. For the warning systen, FEMA calls CNN. Within minutes, every tv, radio and internet outlet will pick up the story. Relatives call home phones and cellphones. SMS messages are sent. The word gets around. People tune to CNN, where they are told to move away from low-lying areas, seek refuge in the east end of basements, occupy sturdy buildings, bicycle to a hilltop; whatever. Medium Term - Study the problem. Fund the science. Is it real? Get more funding. Refine the plan. Long Term - I used to be a geotechnical engineer. There is a little used, expensive technology called "in situ vitrification". Put four electrodes in the ground, run a honking big current through it, and melt the ground. The resulting glass traps the contaminants. So, build a nuclear power plant in on the island, and spot-weld the slip plane. Honestly people, what's the big fuss?