Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Magnetic Storms And Earthquakes

22.03.2002


For years scientists have been studying the impact of different geophysical fields on the earthquakes occurrence. It has been assumed that the fields, generated due to the solar activity, earth flows fluctuations, the Earth`s speed of rotation and even the launch of magnetohydrodynamic generators affect the strained state of the earth`s crust, these fields `pumping` additional energy into the crust. Normally the aroused earthquakes are recorded several days after the provoking key event.



Specialists from the Shmidt United Institute for Physics of the Earth, Russian Academy of Sciences, assume that magnetic storms are also powerful enough to quake the earth`s crust. To verify the hypothesis, the researchers compared more than 14,000 earth`s crust vibrations of sufficient power recorded since 1975 in Kazakhstan and Kirgizia, and approximately 350 sudden magnetic storms recorded within the same period by the world geomagnetic observations network.

Geomagnetic storms usually arise due to the high-speed plasma streams ejection on the Sun which accompany the solar flares activity. The air-blast produced by the high-speed plasma streams ejection hits the Earth magnetosphere causing the vibrations. The beginning of the storm which lasts from several hours to several days can be sensed almost simultaneously all over the Earth. Then the storm is replaced by a longer recovery stage, when the Earth magnetic field is gradually restored. At this stage the magnetic field characteristics vary considerably in different latitudes.


The calculations have proved that the greatest number of earthquakes in Kazakhstan and Kirghizia occurs within a several-day period after the beginning of the magnetic storm. Normally the number of earthquakes increases noticeably after a magnetic storm takes place. Nevertheless, in some areas the opposite regularity has been observed. In order to account for other factors (possibly of no less importance), the scientists have tried to trace a connection between the above earthquakes and the tidal fluctuations. However, according to the statistical analysis the tidal fluctuations, unlike geomagnetic storms, have no impact on the earthquakes.

The scientists have also tried to estimate whether the magnetic storm energy is sufficient to provoke an earthquake. In general, the seismic activity releases the energy amount comparable with that carried over by the magnetic storm. However, an earth shock consumes only the hundredth part of the involved resilient energy which triggers the process. Besides, the electromagnetic energy of the storm is being converted into mechanical one through complicated effects in the rocks, for instance piezoelectric effect. The efficiency factor of this conversion makes as little as the hundredth parts of a percent. Therefore, the scientists tend to believe that the magnetic storm acts as the earthquake trigger. The geophysics hope to understand better the physical nature of the trigger effect in the course of the future fieldwork and laboratory experiments.

Tatiana Pitchugina | alphagalileo

More articles from Earth Sciences:

nachricht Climate satellite: Tracking methane with robust laser technology
22.06.2017 | Fraunhofer-Gesellschaft

nachricht How reliable are shells as climate archives?
21.06.2017 | Leibniz-Zentrum für Marine Tropenforschung (ZMT)

All articles from Earth Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Study shines light on brain cells that coordinate movement

26.06.2017 | Life Sciences

Smooth propagation of spin waves using gold

26.06.2017 | Physics and Astronomy

Switchable DNA mini-machines store information

26.06.2017 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>