Scientists provide a new hazard assessment for Peninsular India to highlight the urgent need to update design standards there in order to construct adequate and safe industrial facilities, dams, and community buildings.
"The results of this paper imply that the level of seismic safety of structures designed based on current standards is lower than its desired level," states co-author Ravi Sinhaa, Ph.D., professor of civil engineering at Indian Institute of Technology (ITT) in Mumbai, India. Sinha and Kishor Jaiswal, also at ITT, focused their research on Peninsular India, which is an old and stable continental plate and home to more than 400 million people.
Stable continental regions are areas away from the boundaries between tectonic plates but still are threatened by infrequent earthquakes that can create strong shaking. Because the large earthquakes are infrequent, they are difficult to study. The Central and Eastern United States is also considered a stable continental plate and has experienced strong earthquakes. The 1811-1812 New Madrid, Missouri earthquakes, for example, were of a magnitude greater than 7.
To estimate the devastating consequences of potential earthquakes, scientists continually re-evaluate hazard assessments for an area. Based on these assessments, governments modify codes for construction of structures, such as dams, industrial buildings, and homes. Design codes based on out-dated assessments could increase the risk of heavy damage by seismic activity.
Sinha and Jaiswal conducted a hazard assessment for the region that looks at a variety of information regarding seismic activity in the region, using a probabilistic framework. The assessment results show that the seismic hazard associated with some major urban areas, such as Mumbai, is higher than the standard design specification now used to build earthquake-resistant structures there.
The authors noted an apparent increase in seismic activity due to better seismological instrumentation to record earthquakes. The increase in seismic activity requires a closer consideration of construction standards. Sinha and Jaiswal explain that their work is "useful in specifying design level for upgrading and retrofitting major structures such as dams and industrial facilities to the desired level of seismic safety."
Nan Broadbent | EurekAlert!
What makes corals sick?
11.12.2017 | Leibniz-Zentrum für Marine Tropenforschung (ZMT)
Mars’ atmosphere well protected from the solar wind
08.12.2017 | Schwedischer Forschungsrat - The Swedish Research Council
Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
With innovative experiments, researchers at the Helmholtz-Zentrums Geesthacht and the Technical University Hamburg unravel why tiny metallic structures are extremely strong
Light-weight and simultaneously strong – porous metallic nanomaterials promise interesting applications as, for instance, for future aeroplanes with enhanced...
An interdisciplinary group of researchers interfaced individual bacteria with a computer to build a hybrid bio-digital circuit - Study published in Nature Communications
Scientists at the Institute of Science and Technology Austria (IST Austria) have managed to control the behavior of individual bacteria by connecting them to a...
Physicists in the Laboratory for Attosecond Physics (run jointly by LMU Munich and the Max Planck Institute for Quantum Optics) have developed an attosecond electron microscope that allows them to visualize the dispersion of light in time and space, and observe the motions of electrons in atoms.
The most basic of all physical interactions in nature is that between light and matter. This interaction takes place in attosecond times (i.e. billionths of a...
08.12.2017 | Event News
07.12.2017 | Event News
05.12.2017 | Event News
11.12.2017 | Physics and Astronomy
11.12.2017 | Materials Sciences
11.12.2017 | Earth Sciences