National Volcano Early Warning System (NVEWS)
The United States
Geological Survey Volcano Hazards Program devised a
systematic method to assess hazard and exposure
factors of volcanoes called the National Volcano
Early Warning System, or NVEWS. While intended
for volcanoes within the United States, the NVEWS
system can be applied to other volcanoes. Here
is my personal NVEWS assessment of the risks posed
by Ol Doinyo Lengai: