Type 1
VEI 2
Explosive Activity 1
Major Explosive Activity 1
Eruption Recurrence 4
Holocene Pyroclastic Flow 1
Holocene Lava Flow 0
Holocene Lahar 1
Holocene Tsunami 0
Hydrothermal Explosion Potential 1
Sector Collapse Potential 1
Primary Lahar Source 1
Observed Seismic Unrest 1
Observed Ground Deformation 0
Observed Fumarolic Degassing 1
--------------Hazard Total------------------- 16
--------------Exposure Factor----------------
Population Index 0
Population Down Stream 0
Historical Fatalities 0
Historical Evacuations 0
Local Aviation Exposure 1
Regional Aviation Exposure 5.15
Power Infrastructure 0
Transportation Infrastructure 0
Major Development 0
Population Density 0
--------------Total Exposure------------------ 6.15
--------------Hazard x Exposure-------------- 98.4

For more information on Hazards and the NVEWS please follow this link and read the PDF written by John Ewert

http://pubs.usgs.gov/of/2005/1164/ Full Citation