All around the upper ledges of the curved glass windows in our living room perches a collection of dappled and dimpled art glass tumblers. These brightly colored tumblers come from an old family collection. They were put together long ago by grandparents long gone. They bring hundreds of different shades and hues of color into the room on a sunny day.

Of course, our house is also located in an earthquake zone.

In fact, every year at least a couple low-number, ro…