From cdeehr at gi.alaska.edu Wed Mar 26 11:06:18 2008 From: cdeehr at gi.alaska.edu (Charles Deehr) Date: Wed, 26 Mar 2008 10:06:18 -0900 Subject: [gse-aa] Auroral Alert Message-ID: <000001c88f74$7bf80810$ec1be589@Forcastle> Active periods in the next period are: March 26-April 2, April 5-15, April 22-29, and May 2-12. During these periods, activity numbers will range between 3 and 5. Dr. Charles Deehr, Prof. Emer. Phys. Ph. 907 474 7473 Fax 907 474 7290 email cdeehr at gi.alaska.edu The Geophysical Institute University of Alaska Fairbanks 903 Koyukuk Ave N Fairbanks, Alaska 99775-7320 From cdeehr at gi.alaska.edu Thu Mar 27 12:27:45 2008 From: cdeehr at gi.alaska.edu (Charles Deehr) Date: Thu, 27 Mar 2008 11:27:45 -0900 Subject: [gse-aa] Auroral Alert Clarification of Forecast Levels Message-ID: <000b01c89049$073d9d70$ec1be589@Forcastle> There are over 13,500 email addresses on the auroral alert list. We cannot send out separate forecasts for each region. Nor is it possible to update the main forecast continually. To determine if the aurora will be visible from your area, you need to check the auroral forecast web page: http://www.gedds.alaska.edu/AuroraForecast/ 1) On the left hand side of the website is a choice of 5 different maps to display the prediction of the nighttime aurora. Click on the map that best shows your location. 2) Click on the words "Interpreting the Forecast" in the right hand side of the website. You will see your map displayed for each of the 10 forecast levels (0 to 9). Find the levels where your location is inside the green line. For example, on the North America map, Chicago requires a 3 to see the aurora on the northern horizon and at least a 5 to see it overhead. An index 5 map for North America is attached to this message as an example. 3) Check the main forecast for the day of interest. If your location is within the green line on the equatorward side of the green and white band around the pole, you should plan on aurora watching that night. 3) To see if the aurora will be visible from your location within the next hour, look at the "short term forecast" on the right hand side of the display. This is a continually updated forecast, based on an actual satellite measurement, so if it shows an index 5 and you are in Seattle, Chicago, New York City, Halifax or anywhere under the green and white band, then there is aurora overhead. If the sun is down, you should go outside, away from city lights with a view of the poleward horizon, and look for it. Dr. Charles Deehr, Prof. Emer. Phys. Ph. 907 474 7473 Fax 907 474 7290 email cdeehr at gi.alaska.edu The Geophysical Institute University of Alaska Fairbanks 903 Koyukuk Ave N Fairbanks, Alaska 99775-7320 -------------- next part -------------- A non-text attachment was scrubbed... Name: NorthPolarAuroraLevel5.jpg Type: image/jpeg Size: 67083 bytes Desc: not available Url : http://www.gi.alaska.edu/pipermail/gse-aa/attachments/20080327/a078aa2c/attachment.jpg