“The earthquake was actually an aftershock associated with the 7.1 magnitude Darfield earthquake that occurred about 15 km west of Christchurch on Sept. 4, 2010. Since then, aftershocks have been occurring on the Greendale Fault, the causative fault, and progressing toward the Christchurch central business district. The relatively shallow depth of the earthquake below the city shows that even 5 to 10 seconds of strong shaking can have devastating effects.
“Some reasons for the serious damage are the many unreinforced masonry buildings in Christchurch and the occurrence of soil liquefaction throughout the city. Soil liquefaction is the transformation of saturated granular soil into a liquid-like substance from high groundwater pressures triggered by strong shaking. The soil liquefaction in Christchurch has damaged many miles of underground water mains, sewers, and electric power cables, and damaged several bridges.
“Many U.S. cities in areas vulnerable to earthquakes have many unreinforced masonry buildings, like those in Christchurch, and are founded on liquefiable soils.”
--Thomas D. O’Rourke, an expert on the impact of earthquakes on infrastructure and Professor of Civil and Environmental Engineering at Cornell University
Joe Schwartz | Newswise Science News
Sun's impact on climate change quantified for first time
27.03.2017 | Schweizerischer Nationalfonds SNF
NASA examines Peru's deadly rainfall
24.03.2017 | NASA/Goddard Space Flight Center
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
24.03.2017 | Materials Sciences
24.03.2017 | Physics and Astronomy
24.03.2017 | Physics and Astronomy