Researchers of the Institute of Ecological Problems of the North, Ural Branch, Russian Academy of Sciences, and the Schmidt Institute of Physics of Earth, Russian Academy of Sciences, have developed technology that allows to register nanoearthquakes - seismic events of minimal possible magnitudes (-4, -5). Registration of such events allows to quickly and accurately make up seismic activity maps of small-scale territories.
Investigation of seismic activity in quiet areas (including revelation and assessment of degree of fracture activity) is of great practical importance. People are laying pipelines, building nuclear power-stations, radioactive waste storages and other potentially dangerous constructions, including tower buildings. However, the earth is vibrating from time to time even in the quietest areas. Certainly, typical shaking of the earth in the middle of the platform is much weaker than that in active regions, but it can also cause trouble if minifracture happens to go under a nuclear power plant. Nanoearthquakes can serve the indicator of seismic well-being in a certain area, but observations over nanoearthquakes require special technology.
Seismic activity of the territory is judged by the earthquake recurrence diagram. In a double logarithmic scale, the diagram represents a straight line, the slope of which characterized seismic activity. The diagram is drawn up based on observation results. Strong earthquakes are the easiest to register but they have to be awaited for a long time. To obtain reliable information about weaker and more frequent quakes, which slightly exceed the noise level and occur 10 to 20 times within half an hour, the researchers have to spend several days per each spot. Only three hours are needed to measure the most feeble events, but they are difficult to be distinguished from disturbances caused by the wash, transport motion or the life of a big settlemen. Besides, existence of such feeble vibrations was assumed only theoretically. However, Russian geophysicists have managed to record them.
Sergey Komarov | alfa
NASA examines Peru's deadly rainfall
24.03.2017 | NASA/Goddard Space Flight Center
Steep rise of the Bernese Alps
24.03.2017 | Universität Bern
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