R. Harmon's Earth 101 Message Board

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Pastimes : R. Harmon's Earth 101

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To: long-gone who wrote (15)	3/8/2000 7:25:00 AM
From: long-gone	Read Replies (1) of 183

before anyone calls me a doom & gloomer - this is a simple heads-up so anyone depending on communications for those minute by minute trades - think ahead:. Today in Space 8 Mar 2000 Solar activity has subsided since March 3. However, sunspot 8900 has a mixed polarity beta-gamma magnetic field. This makes it a possible site for M-class solar flares. Because 8900 is near the center of the Sun's disk, flares or coronal mass ejections from this region will probably be aimed at our planet. Geomagnetic activity is still moderately high. Residents of the northern United States and Canada should be on the alert for auroral activity. The best time to spot aurora is usually near local midnight. The phase of the moon is nearly new and skies are accordingly dark. If the high levels of geomagnetic activity continue, the next few nights could be good for aurora watching. X-ray Solar Flare Classification spaceweather.com The classification of a solar flare is based on its x-ray energy output. Flares are classified by the Space Environment Services Center according to the order of magnitude of the peak burst intensity (I) measured by Earth-orbiting satellites in the 0.1 to 0.8 nanometer spectral band as follows: Class Peak, 0.1 to 0.8 nm band (W/square m) B I < 10.0E-06 C 10.0E-06 < = I < 10.0E-05 M 10.0E-05 < = I < 10.0E-04 X I > = 10.0E-04 C-type flares are common. M-class flares are larger and more rare. X-class flares are even less common and are considered to be major events. spaceweather.com

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