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:1/14/2019)... ... January 14, 2019 , ... CellMax ... cancer cells in blood, will present new findings at the ASCO Gastrointestinal Cancer ... colorectal cancer. The results from this study show CellMax Life’s blood test, based ...
(Date:1/10/2019)... (PRWEB) , ... January 09, 2019 , ... Dr. Beanlands ... Heart Institute in Ottawa, Ontario, Canada. He is also Director of its National ... of Medicine, in the Department of Radiology, and in the Department of Cellular and ...
(Date:1/10/2019)... ... 2019 , ... A major goal for pharmaceutical companies has ... significantly more expensive in vivo studies in order to reduce costs and improve ... researchers have begun to adopt 3D cell culture models which have been shown ...
Breaking Biology News(10 mins):
(Date:12/20/2018)... ... December 20, 2018 , ... New Year’s brings reflection ... changes in regulations in the European Union (EU) on the horizon, Jim Kasic, president ... , “The transition to the EU Medical Device Regulation (MDR), digital health, and big ...
(Date:12/18/2018)... ... December 18, 2018 , ... Patients with early stages of breast cancer who ... post-treatment versus whole breast irradiation, a new study suggests. , Patients with early stage ... irradiation after removal of the cancerous tumor because there is a 30 to 40 ...
(Date:12/13/2018)... ... December 13, 2018 , ... Microbial Discovery Group LLC (MDG) ... been part of their strategic plan and an important milestone in increasing their ... opportunities for MDG within the $44 Billion human probiotic market. This plan is ...
(Date:12/5/2018)... (PRWEB) , ... December 04, ... ... an established North American full-service contract research organization (CRO), announced the acquisition ... transaction significantly strengthens ARG’s reach and experience in the management of clinical ...
Breaking Biology Technology:
Cached News: