Four of the 15 happened during my tenure as an emergency manager here in the northwest. More of them happened during my lifetime, e.g., Mount Saint Helens, which I remember watching on TV in Wisconsin.
Clearly there is a call to action to become better prepared. Preparedness needs to move beyond the three days, which here in Oregon and Washington is now 14 days as messaging to the public. The killer buildings that exist throughout the area are unreinforced masonry buildings (URM) that need to be seismically mitigated. It will be done by people and governments who care, or they will fall down in a big quake and kill people. It is as simple as that.