Not even close. ES has to be down 120 points (10%) for the first RTH limit to kick in. http://www.cmegroup.com/trading/equity-index/files/PriceLimitGuide.pdf
DJIA is similar... 1200 pts (used to be 400) or 10% and it's 1hour. 20% and it's 2hours. 3600pts and trading is closed for the day. There are some stipulations on when the drops occur, except for the last one, in which case no matter when it occurs, the market still closes for the day.