Tag Archive | "earthquake"

Purdue receives $105M to lead earthquake engineering network

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Purdue receives $105M to lead earthquake engineering network


WEST LAFAYETTE, Ind. — Advancing research and education to reduce the devastation and loss of human life from earthquakes and tsunamis is the goal of a new center at Purdue University.

HUBzero is a new way for scientists and engineers to publish and share information. The latest hub will be used to study the causes and effects of earthquakes for the Network for Earthquake Engineering Simulation, or NEES. This hub joins others focused on topics such as nanotechnology, microelectromechanical systems, pharmaceutical products, cancer care, assistive technologies for people with disabilities, heat-transfer issues in engineering, and several others. New hubs are being created at a rate of about one per month. (Purdue University image/Michele Rund and Steve Tally)

HUBzero is a new way for scientists and engineers to publish and share information. The latest hub will be used to study the causes and effects of earthquakes for the Network for Earthquake Engineering Simulation, or NEES. This hub joins others focused on topics such as nanotechnology, microelectromechanical systems, pharmaceutical products, cancer care, assistive technologies for people with disabilities, heat-transfer issues in engineering, and several others. New hubs are being created at a rate of about one per month. (Purdue University image/Michele Rund and Steve Tally)

The National Science Foundation awarded $105 million to a Purdue-led team to spearhead a center that will serve as headquarters for the operations of the George E. Brown, Jr. Network for Earthquake Engineering Simulation, or NEES. Submitted through the Cyber Center in Purdue’s Discovery Park, the grant spans five years and is the largest in the university’s history.

Purdue will connect 14 NEES research equipment sites and the earthquake engineering community through groundbreaking cyberinfrastructure, education and outreach efforts. Purdue’s center is expected to begin operations on Oct. 1, and will be housed in the university’s Discovery Learning Research Center in Discovery Park.

“I was delighted to learn that Purdue has the opportunity to lead this consortium of first-rate research universities,” said Purdue President France A. Córdova, who serves on the National Science Board, the governing board for the NSF, but was excused from deliberations on the award. “I’ve seen firsthand how devastating an earthquake can be not only to buildings, highways and the infrastructure of a city, but also to families, the community and people’s sense of security.

“Purdue’s depth of knowledge in earthquake engineering, innovative high-performance computing experts, education professionals and outstanding interdisciplinary research abilities allow the university to make great contributions to this area. The universities and institutions participating have had great individual successes, and we hope to bring them together to create a whole that is even greater than the sum of its parts.”

In the past decade, 124 major earthquakes have occurred throughout the world, according to the U.S. Geological Survey. Major earthquakes are generally accepted to register a magnitude in excess of 7 on the Richter scale and inflict serious damage, including the collapse of buildings and bridges, over a large area.

The organization estimates that earthquakes were responsible for 463,959 deaths in the past decade.

The Purdue-led NEEScomm Center, which stands for NEES Community and Communications, includes partners from the University of Washington at Seattle, University of Texas at Austin, University of Kansas at Lawrence, San Jose State University, the University of Florida at Gainsville, University of Michigan at Ann Arbor and Fermi National Accelerator Laboratory.

The center will help researchers share information and equipment to enable research and innovation in earthquake and tsunami loss reduction, create an educated work force in hazard mitigation, and conduct broader outreach and lifelong learning activities, said Julio Ramirez, the project’s principal investigator and a professor of civil engineering.

“Recent events have highlighted the importance of earthquake engineering for the United States and the world,” said Ramirez, who also will serve as the center’s director. “In China last year, tens of thousands of people perished as entire cities came down. The earthquake caused a tremendous financial burden in terms of rebuilding the civil infrastructure, but more than that, a high percentage of those who died were children – the future of a nation.”

Building codes and earthquake preparedness have improved in recent years, but even cities that lead in incorporating the latest safety features are at risk for serious damage, he said.

“Even in Los Angeles, a relatively young city in the global perspective, the building inventory includes structures that were built before buildings were engineered to mitigate earthquake hazard,” Ramirez said. “Earthquake design provisions have changed rapidly and substantially since 1980.”

Older cities and those in developing countries are likely to have the most buildings vulnerable to earthquakes and face the highest risk for damage and loss of lives, he said.

Forbes magazine cited a 2001 study by GeoHazards International that estimated the number of lives that would be lost if different cities experienced a magnitude 6 or higher earthquake. The study evaluated cities in Asia and the Americas. Kathmandu, Nepal, topped the list, followed by Istanbul, Turkey; Delhi, India; Quito, Ecuador; Manila, Philippines; and Islambad, Pakistan. All of the cities were estimated to face tens of thousands of fatalities if an earthquake struck.

The Purdue-based center will lead, manage, operate and maintain NEES. Through the NEES network, researchers from the United States and abroad conduct experiments and simulations of the ways buildings, bridges, utility systems and different materials perform during seismic events. Earthquake engineers will use this information to develop better and more cost-effective ways of reducing earthquake damage through improved materials, construction techniques and monitoring tools, Ramirez said.

The center’s education, outreach and training initiatives will use engineering education research to construct next-generation learning experiences that can be disseminated globally, he said. A team of engineering educators and technology specialists will develop the NEES Academy, a state-of-the-art virtual institution for cyber-enabled learning. The academy will help preK-12 teachers develop student interest in, and awareness of, science, mathematics, engineering and technology and will support undergraduate and graduate students engaging in research.

“The center will bring world-class education to any place in the world that has access to broadband Internet,” Ramirez said. “It will enable colleges and universities that don’t have the educational resources of Purdue to access the facilities, equipment, simulations and teaching tools of the participating institutions.”

Joy M. Pauschke, NEES program director at the National Science Foundation, said NEES is an integral part of the U.S. National Earthquake Hazards Reduction Program to support basic research to discover new knowledge, innovation and technologies for earthquake and tsunami loss reduction for the nation.

“During the first five years of operations, the unique NEES experimental capabilities and the extraordinarily strong user support from facility staff have enabled landmark testing and comprehensive experimental data capture for modeling seismic performance that was not possible before NEES,” Pauschke said. “Through Purdue’s leadership, the NEES experimental facilities, NEEShub and NEES Academy will provide world-class resources for earthquake engineering researchers, educators, students and practitioners not only in the United States, but globally.”

A cornerstone of the center is the development of information technology components that allow for new forms of collaboration and cooperation, said Rudolf Eigenmann, co-principal investigator and professor of electrical and computer engineering.

The NEEScomm Center will be a collaborative space and science hub where scientists and engineers can run scientific models and “what if?” scenarios. Hubs, which were first developed at Purdue, allow researchers to run models using a simple Web interface. The hub connects with supercomputing resources on the NSF’s TeraGrid and the national DiaGrid, which allow researchers to run their experiments without having to request time on a supercomputer.

Rudolf Eigenmann, professor of electrical and computer engineering, stands in front of screens displaying the prototype cyberinfrastructure for NEEScomm. The National Science Foundation awarded $105 million to a Purdue-led team to spearhead a center that will serve as headquarters for the operations of the George E. Brown, Jr. Network for Earthquake Engineering Simulation. Eigenmann is a co-principal investigator on the project. (Purdue News Service photo/Andrew Hancock)

Rudolf Eigenmann, professor of electrical and computer engineering, stands in front of screens displaying the prototype cyberinfrastructure for NEEScomm. The National Science Foundation awarded $105 million to a Purdue-led team to spearhead a center that will serve as headquarters for the operations of the George E. Brown, Jr. Network for Earthquake Engineering Simulation. Eigenmann is a co-principal investigator on the project. (Purdue News Service photo/Andrew Hancock)

“A critical and often difficult component of sharing data to advance research is making the findings of others easy to access and use,” Eigenmann said. “The HUBzero technology will allow for someone to simply go to a Web site and instantly be able to view data or run a simulation. It will eliminate the need to first download and install an application to view the data and then spend time downloading a large volume of data before beginning work.”

The cyberinfrastructure to be deployed by the NEEScomm Center is powered using HUBzero technology, which was originally created by researchers at Purdue University to support nanoHUB.org, a site for researchers studying nanotechnology. Currently there are nine other hubs online in science, engineering and medicine, and 12 more are expected to be online within a year, including the new NEEShub.

Ellen Rathje, professor of geotechnical engineering at the University of Texas at Austin and co-principal investigator of the project, said another key advantage of NEEShub is its data presentation capabilities.

“The new information technology created will enable research to take place that couldn’t be done before,” Rathje said. “Data will be presented in an easily searchable and usable format, like a virtual lab notebook, that will give experiments a longer life as researchers reuse existing data to run their own analysis and find new insights. It’s sort of like Facebook for scientists, but instead of posting vacation photos we’re posting research results.”

In addition to Ramirez and Eigenmann, Purdue University project co-principal investigators include Thomas Hacker, assistant professor of computer and information technology; Sean Brophy, assistant professor of engineering education; and Saurabh Bagchi, associate professor of electrical and computer engineering.

In addition, assistant professors of civil engineering Santiago Pujol and Ayhan Irfanoglu provide the team with earthquake engineering expertise in information technology matters of tele-operation and data management.

Project co-principal investigator Barbara Fossum, former managing director of Purdue’s Cyber Center, will serve as the center’s deputy director, and Dawn Weisman, former managing director of Purdue’s PRISM: National Nuclear Security Administration Center for Prediction of Reliability, Integrity and Survivability of Microsystems, will serve as information technology director.

Co-principal investigators Brophy and Thalia Anagnos from San Jose State University will co-lead the center’s education, outreach and training initiatives.

Fossum said the center will manage the operations of the network and engage the equipment sites to effectively carry out program initiatives.

“The United States has invested close to $300 million to commission and enable the equipment sites, and there are over 100 projects currently under way,” she said. “It is a resource for the nation and we want to help realize its full potential by sharing the unique resources and programs at each site across the network and with those interested in mitigating earthquake hazards throughout the world.”

The center will create more than 20 full-time positions and five graduate student positions at Purdue for Web application developers, software engineers, and research scientists and engineers.

The NEES equipment sites include Oregon State University; University of Nevada, Reno; University of California, Davis; University of California, Berkeley; University of California, Santa Barbara; University of California at Los Angeles; University of California at San Diego; University of Texas, Austin; University of Minnesota; University of Illinois, Urbana; University at Buffalo-SUNY; Cornell University; Rensselaer Polytechnic Institute; and Lehigh University.

NEES began development in 2000 and is a shared national network of 14 state-of-the-art earthquake engineering and tsunami experimental facilities at universities across the United States. It includes collaborative tools, a centralized data repository and earthquake simulation software.

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New Madrid fault system may be shutting down

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New Madrid fault system may be shutting down


WEST LAFAYETTE, Ind. — The New Madrid fault system does not behave as earthquake hazard models assume and may be in the process of shutting down, a new study shows.

A team from Purdue and Northwestern universities analyzed the fault motion for eight years using global positioning system measurements and found that it is much less than expected given the 500- to 1,000-year repeat cycle for major earthquakes on that fault. The last large earthquakes in the New Madrid seismic zone were magnitude 7-7.5 events in 1811 and 1812.

This map shows areas damaged by the Dec. 16, 1811, magnitude 7.2 earthquake. That earthquake was the first of three major temblors along the New Madrid fault in 1811 and 1812.  (Image courtesy of Seth Stein, based on results by Susan Hough)

This map shows areas damaged by the Dec. 16, 1811, magnitude 7.2 earthquake. That earthquake was the first of three major temblors along the New Madrid fault in 1811 and 1812. (Image courtesy of Seth Stein, based on results by Susan Hough)

Estimating an accurate earthquake threat for the area, which includes parts of Illinois, Indiana, Tennessee, Arkansas and Kentucky, is crucial for the communities potentially affected, said Eric Calais, the Purdue researcher who led the study.

“Our findings suggest the steady-state model of quasi-cyclical earthquakes that works well for faults at the boundaries of tectonic plates, such as the San Andreas fault, does not apply to the New Madrid fault,” said Calais, who is a professor of earth and atmospheric sciences. “At plate boundaries, faults move at a rate that is consistent with the rate of earthquakes so that past events are a reliable guide to the future. In continents, this does not work. The past is not necessarily a key to the future, which makes estimating earthquake hazard particularly difficult.”

The team determined that the ground surrounding the fault system is moving at a rate of less than 0.2 millimeters per year and there is likely no motion. A paper detailing the work is published in the current issue of Science magazine.

Seth Stein, co-author of the paper, said this surface movement represents energy being stored that could be released as an earthquake.

“Building up energy for an earthquake is like saving money for a big purchase,” said Stein, the William Deering Professor of Earth and Planetary Sciences at Northwestern University. “You put money in over a long period of time and then spend it all at once and have to start saving again.”

With an earthquake, it is elastic deformation that must be built up. This can be measured using GPS through movements on the surface, he said.

“The slower the ground moves, the longer it takes until the next earthquake, and if it stops moving, the fault could be shutting down,” Stein said. “We can’t tell whether the recent cluster of big earthquakes in the New Madrid is coming to an end. But the longer the GPS data keep showing no motion, the more likely it seems.”

The U.S. Geological Survey-funded study used data recorded at nine GPS antennas mounted in the ground in the earthquake zone.

“GPS technology can measure movement to the thickness of a fishing line,” Stein said. “Use of GPS to study earthquakes shows the impact a new technology can have. It lets us see that the world is different than we thought it was.”

In the Midwest there are other faults that show no activity today but have evidence of earthquakes occurring within the past 10,000 to 1 million years, Calais said.

“If other faults in the central and eastern U.S. have been active recently, geologically speaking, they could potentially be activated again in the future,” he said. “We need to develop a new paradigm for how earthquakes happen at faults that are inside continents.”

Calais and Stein are exploring possible explanations for the behavior of faults like the New Madrid. One possibility is that earthquakes in these areas occur in clusters and then migrate to a nearby fault.

“There is the possibility that seismicity migrates with time as earthquakes trigger earthquakes on nearby faults,” Calais said. “Geologists studying the seismic history of faults have found that there have been earthquakes on several faults in the central and eastern U.S. and that they seem to produce bursts of earthquakes and then turn off.”

The team is doing additional analysis and modeling to study this further.

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Purdue groups to hold memorial service for earthquake victims


WEST LAFAYETTE, Ind. — Members of the Purdue University community will gather at 7 p.m. June 12 to remember the victims of the earthquake that occurred in China’s Sichuan province last month.

The memorial service will be held at University Church, 320 North St., West Lafayette. The date marks the one-month anniversary of the earthquake. The service is open to the public.
As of Wednesday (June 4), the death toll stood at 69,019, with more than 370,000 injured and more than 18,000 reported missing.

Assistant Dean of Students Sue Wilder, who is helping organize the service, said there are strong ties between Purdue and the people of China. Last year Purdue hosted more than 800 Chinese students, and more than 200 Purdue students participated in study abroad programs in China.

Purdue University Religious Leaders, the Chinese Students and Scholars Association, the Greater Lafayette Chinese Alliance Church and Office of the Dean of Students are sponsoring the memorial service.

Parking during the service will be available in the Grant Street Parking Garage.

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