The Sun Also Surprises

[groovedaddy]

DESPITE warnings that New Orleans was unprepared for a severe hit by a hurricane, America was blindsided by Hurricane Katrina, a once-in-a-lifetime storm that made landfall five years ago this month. We are similarly unready for another potential natural disaster: solar storms, bursts of gas on the sun’s surface that release tremendous energy pulses.

Occasionally, a large solar storm can rain energy down on the earth, overpowering electrical grids. About once a century, a giant pulse can knock out worldwide power systems for months or even years. It’s been 90 years since the last super storm, but scientists say we are on the verge of another period of high solar activity.

This isn’t science fiction. Though less frequent than large hurricanes, significant storms have hit earth several times over the last 150 years, most notably in 1859 and 1921. Those occurred before the development of the modern power grid; recovering from a storm that size today would cost up to $2 trillion a year for several years.

Storms don’t have to be big to do damage. In March 1989 two smaller solar blasts shut down most of the grid in Quebec, leaving millions of customers without power for nine hours. Another storm, in 2003, caused a blackout in Sweden and fried 14 high-voltage transformers in South Africa.

http://www.nytimes.com/2010/08/16/opinion/16joseph.html?th&emc=th