This section has one page. Click on the pdf icon at left if you do not have an  activity sheet for this section.

A - Variation

Click here to go to the VARIATION site.

1. What does the graph seem to tell us about the average number of geomagnetic disturbances?
2. Besides the explanation that there are more disturbances, what other explanation is possible to explain the fact that the number of disturbances measured is increasing?

B - Cost vs. Cost

Click here to go to the UNIVERSITY OF MICHIGAN SOLAR COST site.

1. What kinds of problems can be avoided if power companies get early warnings of coming geomagnetic storms?

Click here to go to the START-UP PROBLEM site.

1. Why should you turn off your electric appliances whenever there is a power failure?

C - International Accord

1. Explain why the cost of maintaining an early warning system for geomagnetic storms is justified.
2. Why should all industrialized nations work together to set up the warning system?

Home | El Nino | Storms | Atmosphere | Fisheries | Great Lakes | Oceans | Teacher

Science with NOAA Research
Updated July 13, 2004