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:
*Name:
*Comment:
*Email:


(Date:3/29/2016)... 2016 LegacyXChange, Inc. (OTC: ... SelectaDNA/CSI Protect are pleased to announce our successful effort ... variety of writing instruments, ensuring athletes signatures against counterfeiting ... from athletes on LegacyXChange will be assured of ongoing ... Bill Bollander , CEO states, "By ...
(Date:3/21/2016)... March 22, 2016 Unique ... passcodes for superior security   ... provider of secure digital communications services, today announced it ... and offer enterprise customers, particularly those in the Financial ... and voice authentication within a mobile app, alongside, and ...
(Date:3/15/2016)... , March 15, 2016 Yissum ... , the technology-transfer company of the Hebrew University, announced ... of remote sensing technology of various human biological indicators. ... raising $2.0 million from private investors. ... based on the detection of electromagnetic emissions from sweat ...
Breaking Biology News(10 mins):
(Date:4/29/2016)... (PRWEB) , ... April 29, 2016 , ... ... medical devices used in spinal surgical procedures, today announced the completion of a ... value proposition for current and future customers and partners. Kohlberg & Company, ...
(Date:4/29/2016)... ... April 29, 2016 , ... Intelligent Implant Systems announced ... FDA via 510(k) for sale in the United States. These components expand the ... fusions. With one-level sales beginning in October of 2015, the company has seen ...
(Date:4/28/2016)... ... April 28, 2016 , ... ... for Connecticut's innovative, growing companies, today announced the launch of VentureClash , ... (fintech) companies. , “VentureClash looks to attract the best early-stage companies ...
(Date:4/27/2016)... Boston (PRWEB) , ... April 27, 2016 , ... ... driven by semantic web technology, today announced that it has been named to The ... life sciences, financial services and other markets, Cambridge Semantics serves the needs of end ...
Breaking Biology Technology:
Cached News: