Savanah Purnell, 4, right, hugs her classmate Madison Messier, 4, as they participate on the Southern California earthquake drill at the Altadena Christian Children's Center in Altadena, Calif. on Thursday, Nov. 13, 2008. (AP Photo/Damian Dovarganes)
About 6.7 million people dropped, covered and held on at 10:15 a.m.
At least, that's how many signed up to participate in the Great California ShakeOut. About 5.5 million people around the region participated last year.
This year's exercise took place during the same week as the 20th anniversary of the Loma Prieta earthquake that killed 63 people, collapsed a major freeway, and caused nearly $6 billion in damage around San Francisco Bay. The magnitude-6.9 temblor struck before the start of the third game of the 1989 World Series.
The last temblor to cause significant damage in California was the 1994 Northridge disaster.
The Great California ShakeOut offers more ways to practice, practice, practice for Thursday's statewide shake. The ShakeOut is an opportunity for Californians to prepare for an earthquake with a statewide drill. The ShakeOut website features a full list of what you'll see and hear Thursday..
Several radio stations, including KNX 1070 AM, KFWB 980 AM and K-FROG 92.9 FM, will broadcast an audio segment that features instructions and background sound effects. KCSB TV 3 in San Bernardino is the only television station that will participate.
The video features three graphics of a person about to crawl under a sturdy table, crawling under the table, and holding on to a leg of the table. It makes your job during the earthquake drill clear: drop, cover, hold on.
In the background, you can hear rumbling, and things falling and shattering -- the usual earthquake soundtrack. The sound effects, minus narration, also are available for download.
More that 6 million people are signed up to participate, according to the website. That many people might be listening in a car at the time of the drill was not lost on the creators.
The narrator states, "Unless you are driving, drop to the ground immediately."
Better idea: "Coast over to the side of the road, stop and set the parking brake. Avoid bridges and overhead hazards."
And, if you think you know everything about quakes, play Flash-based "Beat the Quake." Do you know how to secure a centerpiece bowl?
The site also features list of ShakeOut activities in the LA area. For example, there's the mass casualty incident exercise at the USC Health Science Campus. Parents and children can attend an event at Kidspace Museum.