Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Major population centers may be at risk; building codes must reflect new seismic data

08.02.2007
Earthquakes in stable continental regions lack sufficient understanding to prepare local populations for future seismic activity, according to a paper published in the February issue of the Bulletin of the Seismological Society of America (BSSA).

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!
Further information:
http://www.msn.com

More articles from Earth Sciences:

nachricht New Study Will Help Find the Best Locations for Thermal Power Stations in Iceland
19.01.2017 | University of Gothenburg

nachricht Water - as the underlying driver of the Earth’s carbon cycle
17.01.2017 | Max-Planck-Institut für Biogeochemie

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Quantum optical sensor for the first time tested in space – with a laser system from Berlin

For the first time ever, a cloud of ultra-cold atoms has been successfully created in space on board of a sounding rocket. The MAIUS mission demonstrates that quantum optical sensors can be operated even in harsh environments like space – a prerequi-site for finding answers to the most challenging questions of fundamental physics and an important innovation driver for everyday applications.

According to Albert Einstein's Equivalence Principle, all bodies are accelerated at the same rate by the Earth's gravity, regardless of their properties. This...

Im Focus: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

Tracking movement of immune cells identifies key first steps in inflammatory arthritis

23.01.2017 | Health and Medicine

Electrocatalysis can advance green transition

23.01.2017 | Physics and Astronomy

New technology for mass-production of complex molded composite components

23.01.2017 | Process Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>