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Aurora Alert Thread

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Author Topic: Aurora Alert Thread  (Read 3277 times)
Martin Mc Kenna
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« on: October 19, 2010, 08:12:41 pm »

Geophysical Activity Forecast: The geomagnetic field is expected to be at quiet to active levels all three days of the forecast period (19 - 21 October), with isolated minor storm periods possible on 19 October. A coronal hole high speed stream (CH HSS) is expected to rotate into a geoeffective position late on 18 October or early on 19 October, followed by a second geoeffective CH HSS expected to arrive early on 20 October. These features, coupled with possible effects from the CME observed on 14 October, are the reasons for the forecasted increase in geomagnetic activity.

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