...— and at Hebgen Lake, Mont.— 1959. Most of the Nation displays some risk of seismic disturbance. Earthquakes sometimes result in compound disasters, in which the major event triggers a secondary associated event. The secondary event may be natural, may result from the failure of some man-made...

...may be shattered and rapid repair of below ground lifelines is almost impossible. Earthquakes often result in compound disasters in which the major event triggers a secondary associated event. The secondary event may be natural, may result from the failure of some man-made...