March 1989 geomagnetic storm

March 1989 geomagnetic storm
Artist's depiction of solar wind colliding with Earth's magnetosphere.

The March 1989 geomagnetic storm was a severe geomagnetic storm that caused the collapse of Hydro-Québec's electricity transmission system. It occurred during solar cycle 22.

Contents

Geomagnetic storm and auroras

The geomagnetic storm causing this event was itself the result of a coronal mass ejection on March 9, 1989.[1] Three and a half days later, at 2:44 am on March 13, 1989, a severe geomagnetic storm struck Earth.[2][3] The storm began on Earth with extremely intense auroras at the poles. The aurora could be seen as far south as Texas.[4] As this occurred during the Cold War, many worried that a nuclear first-strike might be in progress.[4] Others considered the intense auroras to be associated with the Space Shuttle mission STS-29, which had been launched on March 13 at 9:57:00 AM.[5] The burst caused short-wave radio interference, including the disruption of radio signals from Radio Free Europe into Russia. It was initially believed that the signals had been jammed by the Soviet government.

As midnight came and went, invisible electromagnetic forces were staging their own pitched battle in a vast arena bounded by the sky above and the rocky subterranean reaches of the Earth. A river of charged particles and electrons in the ionosphere flowed from west to east, inducing powerful electrical currents in the ground that surged into many natural nooks and crannies.[4]

Some satellites in polar orbits lost control for several hours. GOES weather satellite communications were interrupted causing weather images to be lost. NASA's TDRS-1 communication satellite recorded over 250 anomalies caused by the increased particles flowing into its sensitive electronics.[4] The Space Shuttle Discovery was having its own problems. A sensor on one of the tanks supplying hydrogen to a fuel cell was showing unusually high pressure readings on March 13. The problem went away after the solar storm subsided.

Quebec blackout

The variations in the earth's magnetic field also tripped circuit breakers on Hydro-Québec's power grid. The utility's very long transmission lines and the fact that most of Quebec sits on a large rock shield prevented current flowing through the earth, finding a less resistant path along the 735 kV power lines.[6]

The James Bay network went offline in less than 90 seconds, giving Quebec its second massive blackout in 11 months.[7] The power failure lasted 9 hours and forced the company to implement various mitigation strategies, including raising the trip level, installing series compensation on ultra high voltage lines and upgrading various monitoring and operational procedures. Other utilities in North America, the UK, Northern Europe and elsewhere implemented programs to reduce the risks associated with geomagnetically induced currents.[6]

Aftermath

In August 1989, another storm caused a halt of all trading on Toronto's stock market.[8]

Since 1995, geomagnetic storms and solar flares have been monitored from the Solar and Heliospheric Observatory (SOHO) satellite, a joint project of NASA and the European Space Agency.

See also

  • Solar storm of 1859

References

  1. ^ Geomagnetic Storms Can Threaten Electric Power Grid Earth in Space, Vol. 9, No. 7, March 1997, pp.9-11 (American Geophysical Union)
  2. ^ Lerner, Eric J. (1995-08). "Space weather: Page 1". Discover. http://findarticles.com/p/articles/mi_m1511/is_n8_v16/ai_17253896/pg_1. Retrieved 2008-01-20. 
  3. ^ "Scientists probe northern lights from all angles". CBC News. 2005-10-22. http://www.cbc.ca/health/story/2005/10/22/northern_lights_051022.html. Retrieved 2008-01-13. 
  4. ^ a b c d "A Conflagration of Storms". http://www.solarstorms.org/SWChapter1.html. Retrieved 2009-04-07. 
  5. ^ "STS-29". Science.ksc.nasa.gov. http://science.ksc.nasa.gov/shuttle/missions/sts-29/mission-sts-29.html. Retrieved 2010-08-09. 
  6. ^ a b Hydro-Québec. "Understanding Electricity - March 1989 - Hydro-Québec". http://www.hydroquebec.com/learning/notions-de-base/tempete-mars-1989.html. Retrieved 2010-10-25. 
  7. ^ Morin, Michel; Sirois, Gilles; Derome, Bernard (13 March 1989). "Le Québec dans le noir" (in French). Radio-Canada. http://archives.radio-canada.ca/environnement/catastrophes_naturelles/clips/14150/. Retrieved 2009-03-21. 
  8. ^ Solar storms halt stock market as computers crash, New Scientist, 9 September 1989.

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