How do I shut off my home's water supply after an earthquake?

How do I shut off my home's water supply after an earthquake?

Mark Benthien (Director of Communication, Education, and Outreach, Southern California Earthquake Center ) gives expert video advice on: How do I shut off my home's water supply after an earthquake?

After an earthquake, if you need to turn the water off to your home, take a 12-inch adjustable wrench, go to your home's main water valve and turn the valve about a half-turn clockwise until you hear the water stop flowing.