Vivos has designed its hardened shelter complexes to mitigate the anticipated forces of the worst-case catastrophes, both natural and manmade. 

 
45 PSI of blast overpressure forces
Force 10 magnitude earthquakes in succession
450 MPH surface winds
50 megaton air burst detonated 10 miles away
Solar flares in excess of 1,000,000 volts
Flooding submersion
Extreme external fires at 1,250 Fahrenheit
Magnetic pole shift
Radiological, chemical and biological weapons
Forced entry and armed assaults
Excessive accumulations of snow and rain
100 LB hail stones at speeds of 100 mph
A fortress in the event of social anarchy