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Seismologists warned against complacency

GNS Science has revised down the risk of another big quake to follow the magnitude 6.5 earthquake that struck the capital at 5.09pm on Sunday.

Thanks to a lack of major aftershocks overnight iPad Cases, the prediction for a tremor measuring over magnitude 6 in the next 24 hours has reduced from 20 per cent to 10 per cent.

"We've had a relatively quiet night so it's not surprising to see that number dropping off," GNS duty seismologist John Ristau told NZ Newswire.

"That's not to say there isn't going to be another big one though. People need to be aware of that."

He said the agency was carefully monitoring patterns from the string of quakes that started with a 5.7 jolt just after 9am on Friday.

It was followed by a 5.8 on Sunday morning, the violent shake late Sunday afternoon and about 120 aftershocks since then, according to GeoNet.

There have been few reports of damage and injury but the swarm has brought Wellington CBD to a standstill as workers are warned to stay home while buildings and infrastructure get safety checks.

Mr Ristau said the activity was triggered by friction between the Australian and Pacific tectonic plates which meet over New Zealand and push against one another.

Interestingly, it seems to be the plates rubbing up and down against each other, rather than typical thrusting forwards, Dentist Hong Kong that is responsible for this series, he said.

The exact fault point involved has yet to be determined.

He said the quake centre had moved to the south-west since Friday, a pattern typically seen in these seismic swarms as earthquake "stress" is transferred away from the epicentre handbags embroidery.

The quakes are similar to a series of four earthquakes over magnitude 5 that struck the region in 2005. They hit 10 to 15 km southwest of the current swarm and caused no damage.
  1. 2013/07/22(月) 17:04:54|
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