HOME >> BIOLOGY >> NEWS
Better techniques needed to predict earthquake hazards, UC study finds

Current methods for estimating the ground-shaking effects of major earthquakes could underestimate their severity and lead to inadequate seismic protection of new and existing buildings, according to a pioneering study of earthquake hazards at three University of California campuses Riverside (UCR), San Diego (UCSD), and Santa Barbara (UCSB).

The study, reported in the April issue of the journal Soil Dynamics and Earthquake Engineering, was conducted in a five-year collaborative research project initiated and directed by Franois Heuze, a geotechnical engineer at Lawrence Livermore National Laboratory (LLNL) near San Francisco. Seven UC campuses participated in the study, known as the Campus Earthquake Program. The researchers found wide discrepancies between their own seismic hazard estimates for the three campuses and those produced by current estimating techniques used for designing new buildings and retrofitting existing buildings.

"The biggest weakness in the current state of the practice for seismic hazard assessment," said Ralph Archuleta, professor of seismology at UCSB, "is that we have very little data for very large earthquakes where the site is close to the causative fault. UCSB, UCR, and UCSD all have major faults that are very close to the campus."

"A single estimate of ground motion for a site is not appropriate," said Heuze. "Even if you have a known fault and restrict your calculations to a known magnitude, this fault could provide that magnitude in many different fashions. Thus the severity of the ground shock where you stand could vary widely."

To try to overcome this problem, the researchers placed several seismic monitoring stations at each campus in boreholes up to 100 meters (330 feet) deep three times the depth of typical geophysical studies and collected data on small earthquakes from local faults as well as regional seismic events. They took and tested soil samples at various depths and simulated hundreds of possi
'"/>

Contact: Charlie Osolin
osolin1@llnl.gov
925-422-8367
DOE/Lawrence Livermore National Laboratory
8-Apr-2004


Page: 1 2 3

Related biology news :

1. Better living through urban ecology
2. Better model of cancer development sheds light on potential angiogenesis target
3. Natural Science and Public Health: Prescription for a Better Environment
4. Better computer modeling provides a new look at large biomolecules
5. UF nutritionist: Better to vow to eat healthy for new year
6. Better "bugs" lead to cheaper ethanol from biomass
7. Diet and cancer prevention: a sampler of story ideas for 5-a-Day for Better Health Week
8. Some Atlantic Coast Beaches Are Shrinking While Floridas Beaches Better Off Than Most
9. New Polyester Products Perform Better And Are Easy To Recycle
10. Better Binding Through Chemistry
11. Urine Tests Will Do Better Than Pelvic Exams To Save Teens From Serious Effects Of Sexually Transmitted Diseases, UCSF Analysis Shows

Post Your Comments:
(Date:6/23/2015)... RALEIGH, N.C. , June 23, 2015 /PRNewswire/ ... technology, today announced the results of a recent ... unmatched accuracy on the wrist during activity. In ... biometric technology was compared along with the Apple ... for accurately measuring heart rate during activity. The ...
(Date:6/17/2015)... Germany , June 17, 2015 ... today launched new Investigator ® STR assay kits for ... the United States . The new genetic fingerprint kits ... markers (short tandem repeats or STRs) for DNA matching. They ... quality of DNA in each sample, a novel QIAGEN technology ...
(Date:6/16/2015)... Fingerprint Cards has received an order ... company,s portfolio from one of its module partners in ... place during the third quarter 2015. The sensors will be ... Jörgen Lantto, CEO of FPC, comments: " This ... interest from smartphone OEMs in integrating touch fingerprint sensors in ...
Breaking Biology News(10 mins):Valencell Delivers Breakthrough Heart Rate Accuracy on the Wrist 2Valencell Delivers Breakthrough Heart Rate Accuracy on the Wrist 3QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 2QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 3QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 4QIAGEN Launches New Genetic Fingerprinting Kits for U.S. Forensic Labs 5FPC Receives Order for Touch Fingerprint Sensors of 375 MSEK 2
(Date:7/3/2015)... ... July 03, 2015 , ... DryLet, ... as animal waste reduction, bioremediation, wastewater treatment, aquaculture and grease, fat and ... that it will be showcasing, ManureMagic™, its industry-leading product for animal waste ...
(Date:7/3/2015)... WIEN , July 3, ... Tiedemiehet voivat hakea verkossa osoitteessa  ... for Open Innovation in Science" ... Ludwig Boltzmann Gesellschaftin (LBG) tekemän, ... tutkimuksen mukaan terveystieteiden kaksi suurinta ...
(Date:7/3/2015)... ... July 03, 2015 , ... The Alexander Group, a ... service industries alike-- typically known for its consummate professionalism-- embarks each year in ... and break from their day jobs. , "Our motto has always been work ...
(Date:7/3/2015)... ... July 03, 2015 , ... The global failure analysis market ... 2015 to 2020. The bioscience market is expected to grow at the highest CAGR ... failure analysis equipment in the research labs and academic institutions for root cause analysis ...
Breaking Biology Technology:DryLet to Highlight Benefits of Patented ManureMagic™ at North American Manure Expo in Chambersburg, PA July 14-15, 2015 2Maailman ensimmäinen tiedemiesten koulutukseen suunniteltu avoimen innovaation ohjelma käynnistyy 2Maailman ensimmäinen tiedemiesten koulutukseen suunniteltu avoimen innovaation ohjelma käynnistyy 3The Alexander Group Declares Their Independence with a Bit of Levity 2Failure Analysis Market to Grow at 7.52% CAGR to 2020 2Failure Analysis Market to Grow at 7.52% CAGR to 2020 3Failure Analysis Market to Grow at 7.52% CAGR to 2020 4Failure Analysis Market to Grow at 7.52% CAGR to 2020 5
Cached News: