Video | Business Headlines | Internet | Science | Scientific Ethics | Technology | Search

 


BOP Quake Swarm TAiling Off, Scientists Say

19 July 2004

BOP Quake Swarm TAiling Off, Scientists Say

Scientists monitoring the swarm of earthquakes in the Bay of Plenty say they appear to be tailing off.

More than 100 shallow earthquakes have occurred northeast of Rotorua since the swarm started on Sunday afternoon. The largest, a magnitude 5.4 quake centred 20km northwest of Kawerau, was felt widely in the Bay of Plenty. At least another five jolts were big enough to have been felt throughout Bay of Plenty.

People living closer to the centre of the swarm would probably have felt dozens of tremors.

" If the pattern follows historical trends, the earthquakes will become less frequent and smaller from now on," said seismologist Ken Gledhill of Geological and Nuclear Sciences Ltd (GNS).

"However as the swarm tails off, there's always a small possibility of a larger quake going against the general trend.

Swarms of small shallow earthquakes were reasonably common in the Bay of Plenty, Dr Gledhill said.

"However, this swarm is slightly unusual in that the magnitudes of the largest earthquakes are bigger than normal. We see this type of swarm perhaps once every decade in the Bay of Plenty."

The swarm is centred northwest of Kawerau and is related to longterm tectonic stretching of the region between Rotorua and East Cape. At this stage, there are no indications that the earthquakes are related to volcanic activity.

Scientists from GNS's Wairakei office are intending to deploy two portable seismic instruments near the centre of the swarm later today. And within the next few days, GNS scientists will document the landslips and other possible ground movements.

Data recorded by the battery-powered seismic instruments will give scientists a more accurate fix on the depth and location of any further quakes in the swarm and a better idea of the relationship between the earthquakes and known active faults in the region.

ENDS


© Scoop Media

 
 
 
 
 
Business Headlines | Sci-Tech Headlines

 

Marketing Rocks!
Ig Nobel Award Winners Assess The Personality Of Rocks

A Massey University marketing lecturer has received the 2016 Ig Nobel Prize for economics for a research project that asked university students to describe the “brand personalities” of three rocks. More>>

ALSO:

Nurofen Promotion: Reckitt Benckiser To Plead Guilty To Misleading Ads

Reckitt Benckiser (New Zealand) intends to plead guilty to charges of misleading consumers over the way it promoted a range of Nurofen products, the Commerce Commission says. More>>

ALSO:

Half A Billion Accounts: Yahoo Confirms Huge Data Breach

The account information may have included names, email addresses, telephone numbers, dates of birth, hashed passwords (the vast majority with bcrypt) and, in some cases, encrypted or unencrypted security questions and answers. More>>

Rural Branches: Westpac To Close 19 Branches, ANZ Looks At 7

Westpac confirms it will close nineteen branches across the country; ANZ closes its Ngaruawahia branch and is consulting on plans to close six more branches; The bank workers union says many of its members are nervous about their futures and asking ... More>>

Interest Rates: RBNZ's Wheeler Keeps OCR At 2%

Reserve Bank governor Graeme Wheeler kept the official cash rate at 2 percent and said more easing will be needed to get inflation back within the target band. More>>

ALSO:

Half Full: Fonterra Raises Forecast Payout As Global Supply Shrinks

Fonterra Cooperative Group, the dairy processor which will announce annual earnings tomorrow, hiked its forecast payout to farmers by 50 cents per kilogram of milk solids as global supply continues to decline, helping prop up dairy prices. More>>

ALSO:

Results:

Get More From Scoop

 
 
 
 
 
 
 
 
 
Sci-Tech
Search Scoop  
 
 
Powered by Vodafone
NZ independent news