The Seismological Lab at the University of Nevada, Reno is finishing the first phase of seismic surveying through downtown as part of a $1 million U.S. Geological Survey study to create an earthquake hazard map in the Reno-Carson City urban corridor.
"There are several suspected faults in the downtown area, and we don't know much about them," John Louie, professor of geophysics in the Seismological Lab said. "We finished the Truckee river profile along Riverside Drive with the minivibe truck and will finish the small southwest Reno portion this week."
"We have really good data," he said. "We're confirming the results of a gravity seismic survey we did 10 years ago, and will be able to more precisely map those and any additional faults we may find."
The gathering of data for this portion of the USGS project will be complete this week and analysis and findings will be completed in the next several months. Louie will work with the USGS to complete abstracts of the research by September to be presented at the American Geophysical Union's annual Fall meeting in San Francisco this December.
"This will be the first chance to present it, and I look forward to having our colleagues see our interpretations," he said.
The Seismological Lab's portion of the project will last 11 days as they do full-scale seismic reflection soundings up to a half-mile deep and for a total of seven miles along the Truckee River and on Reno streets.
"This is a process of discovery," Louie said. "We've looked for the suspected faults, may possibly find faults we don't know about and will be able to identify the most hazardous faults."
The truck, using a relatively light 700-pound reaction weight, stops every 30 feet, sets the shaker on the asphalt and vibrates the ground for a few minutes. Hundreds of monitoring sensors connected by cable transmit the soundings to the recording truck. It's a slow process, with the truck creeping less than one mile a day along the river route.
Louie is the principal investigator on the seismic survey for the University. He will be working with two PIs from the USGS to make thousands of soundings to complete the high-resolution, non-invasive seismic imaging study using industry techniques for oil and gas exploration.
Louie has seven students working in the crew, gaining valuable real-world experience.
"They will have the opportunity to participate in a real, professional survey not just a class exercise," he said. "They will have a comprehensive view of the whole process, from knocking on doors notifying residents of the work, to placing the ground motion sensors and interpreting the 3D computer results."
The engineering and geological sciences department has two co-principal investigators collaborating on the project: Dr. Pat Cashman, an expert in structural geology, and Dr. Ilenna Tibuleac, research seismologist and geophysicist.
"This is a rare project for the USGS," Louie said. "They have little money for these types of projects and we're pleased they have turned their attention here."
The survey will be done using the latest tools of the trade: the vibrator truck is made possible through a National Science Foundation grant, and the several-thousand-dollar software used to process and interpret the data is being donated for the project by the Reno-based global geotechnical engineering firm Optim, which provides geophysical software and data services around the world.
Nevada's land-grant university founded in 1874, the University of Nevada, Reno has an enrollment of nearly 17,000 students. The University is home to one the country's largest study-abroad programs and the state's medical school, and offers outreach and education programs in all Nevada counties. For more information, visit www.unr.edu.
Mike Wolterbeek | EurekAlert!
Large-Mouthed Fish Was Top Predator After Mass Extinction
26.07.2017 | Universität Zürich
Strength of tectonic plates may explain shape of the Tibetan Plateau, study finds
25.07.2017 | University of Illinois at Urbana-Champaign
Physicists working with researcher Oriol Romero-Isart devised a new simple scheme to theoretically generate arbitrarily short and focused electromagnetic fields. This new tool could be used for precise sensing and in microscopy.
Microwaves, heat radiation, light and X-radiation are examples for electromagnetic waves. Many applications require to focus the electromagnetic fields to...
Strong light-matter coupling in these semiconducting tubes may hold the key to electrically pumped lasers
Light-matter quasi-particles can be generated electrically in semiconducting carbon nanotubes. Material scientists and physicists from Heidelberg University...
Fraunhofer IPA has developed a proximity sensor made from silicone and carbon nanotubes (CNT) which detects objects and determines their position. The materials and printing process used mean that the sensor is extremely flexible, economical and can be used for large surfaces. Industry and research partners can use and further develop this innovation straight away.
At first glance, the proximity sensor appears to be nothing special: a thin, elastic layer of silicone onto which black square surfaces are printed, but these...
3-D shape acquisition using water displacement as the shape sensor for the reconstruction of complex objects
A global team of computer scientists and engineers have developed an innovative technique that more completely reconstructs challenging 3D objects. An ancient...
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
26.07.2017 | Event News
21.07.2017 | Event News
19.07.2017 | Event News
27.07.2017 | Life Sciences
27.07.2017 | Life Sciences
27.07.2017 | Health and Medicine