With more than 540,000 Nevadans already registered to participate in the annual statewide public earthquake drill, the Great Nevada Shakeout is hoping to up that total by another 100,000 residents.

The Great Nevada ShakeOut is a simple, coordinated “drop, cover and hold on” exercise. It is Oct. 20 at 10:20am.

Last year, more than 560,000 Nevadans participated.

To register as an individual, business, school or government agency or organization, go online.