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Texas Tech Seismologist: Christchurch Quake Location Surprising, More Large Quakes Near City Unlikely

25.02.2011
Though Tuesday’s earthquake in New Zealand wasn’t in itself surprising, the locality so close to southern New Zealand’s largest city did catch many off guard, said a Texas Tech University geophysicists and seismologist.

An earthquake measuring 6.3 rocked Christchurch three miles from the city center, and news reports have estimated 75 deaths with more than 300 people still missing.

“The locality beneath Christchurch is definitely surprising, but everything else is not so surprising,” said Hua-wei Zhou, the Pevehouse Chair and Professor of Petroleum Geophysics and Seismology in the Department of Geosciences. “This is the sixth aftershock measuring 5.0 or more since the last big earthquake on Sept. 3, 2010.”

Zhou explained that while the Sept. 3, 2010, earthquake measured 7.0 in magnitude, it happened in a relatively rural area 30 miles west of Christchurch and didn’t cause as much damage. Because of the earthquake’s location and the fault’s motion – a strike-slip motion with plates grinding horizontally with some vertical movement also – this may have intensified the damage in an already heavily populated area.

Because of the historical rarity of earthquakes in the city, Zhou predicted that the Christchurch area most likely wouldn’t experience another earthquake for several years to decades.

In May 2008, Zhou led a team of six graduate students to deploy 60 seismometers near the Three Gorges Dam after an earthquake measuring 7.9 struck the Sichuan province in Central China. Zhou's research interests include improving seismic imaging methods and mapping mantle and crustal seismic structures of various regions.

Find Texas Tech news, experts and story ideas at www.media.ttu.edu and on Twitter @TexasTechMedia.

CONTACT: Hua-wei Zhou, Pevehouse Chair and Professor of Petroleum Geophyiscs and Seismology in the Department of Geophysics, Texas Tech University, (806) 742-1308 or h.zhou@ttu.edu

John Davis | Newswise Science News
Further information:
http://www.ttu.edu

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