Earthquake In New Zealand

"It is still possible that we'll have a magnitude 6 in the next week, and people ought to be aware of that, particularly if they are around structures which are already damaged," Ken Gledhill of the Institute of Geological and Nuclear Sciences told the NZPA news agency.
"For a shallow earthquake like this, they will go on for weeks," he added. "And if a building is badly damaged, it won't take much shaking to push it over."