Earthquakes, magnetic storms: Shaking up a storm... or vice-versa

April 9, 2002

Brussels, 08 April 2002

No-one can tell with any great accuracy exactly when and where the next earthquake will strike this planet, but Russian scientists believe magnetic storms are a good place to start looking.

The earth's surface seems rock solid, but it is in fact a dynamic grid of slowly shifting 'tectonic' plates. Although incredibly slow, this motion causes stress to build up in the crust which, beyond a critical threshold, causes a portion of the crust to give way, shifting suddenly and violently - what we feel as earthquakes. Research into this potentially devastating natural phenomenon has focused on a number of geophysical areas such as the earth's rotation, solar activity and now magnetic hydrodynamic causes.

Scientists at the Russian Academy of Sciences have investigated the connection between magnetic storms and earthquakes in the seismically active Central Asian region, which also takes in northern Afghanistan - the site of recent quakes measuring over 6 on the Richter scale, causing untold damage and thousands of deaths.

The trigger effect

Since 1975, researchers have compared some 14 000 earth tremors in Kazakhstan and Kyrgyzstan with around 350 sudden magnetic storms occurring over the same period in the region - concluding with some confidence the propensity for earthquakes increases after a magnetic storm takes place. The relationship is complicated but it is centred on the way magnetic storms, interacting with high-speed plasma streams, cause noticeable vibrations as they hit the earth's magnetosphere. The electromagnetic energy in the storm is converted into mechanical energy through a series of conversions in the rocks, such as the 'piezoelectric effect', which are believed to trigger earthquakes. The researchers hope to better understand the physical nature of this 'trigger effect' in the course of future fieldwork and laboratory experiments.

More information
Shmidt United Institute for Physics of the Earth
Russian Academy of Sciences
Contact: sobolev@uipe-ras.scgis.ru

Source: Research DG http://europa.eu.int/comm/dgs/research/ index_en.html

You've reached your article limit

Register to continue

Registration is free and only takes a moment. Once registered you can read a total of 6 articles each month, plus:

  • Sign up for the editor's highlights
  • Receive World University Rankings news first
  • Get job alerts, shortlist jobs and save job searches
  • Participate in reader discussions and post comments
Register

Have your say

Log in or register to post comments

Featured Jobs

Most Commented

James Fryer illustration (8 September 2016)

Some lecturers will rightly encourage forms of student interaction that are impossible for those covering their faces, Eric Heinze argues

University of Oxford students walking on campus

University of Oxford snatches top spot from Caltech in this year’s World University Rankings as Asia’s rise continues

Handwritten essay on table

Universities must pay more attention to the difficulties faced by students, says Daniel Dennehy

Theresa May entering 10 Downing Street, London

The prospect of new grammar schools on the horizon raises big questions for HE, writes Nick Hillman

Nosey man outside window

Head of UK admissions service Mary Curnock Cook addresses concerns that universities might ‘not hear a word’ from applicants