A powerful 7.0-magnitude earthquake struck much of New Zealand's South Island early Saturday and caused widespread damage.CBS News Correspondent Ben Tracy reports that 75 percent of the city of nearly 400,000 people is without power, the hospital is running on a generator and countless water pipes have burst.
The quake, which hit 19 miles west of the southern city of Christchurch according to the state geological agency GNS Science, shook a wide area, with some residents saying buildings had collapsed and power was severed. No tsunami alert was issued.
GNS Science initially reported the quake as magnitude 7.4, but later downgraded it after re-examining quake records. The U.S. Geological Survey measured the quake at 7.0.
