MAGNETIC STORMS ON THE WAY!

11-27-17

A high-speed stream of solar wind is approaching Earth. Estimated time of arrival: Nov. 27th. The onset of the solar wind could kick off 3 days of polar geomagnetic activity, boosted to G1-storm levels by the glancing impact of a CME on Nov. 29th (described below). Arctic sky watchers should be alert for auroras in the nights ahead. 

GLANCING BLOW CME
On Nov. 25th, a filament of magnetism in the sun's northern hemisphere exploded. 

The blast opened a "canyon of fire" in the sun's atmosphere and hurled a coronal mass ejection (CME) into space. This movie from the orbiting Solar and Heliospheric Observatory shows the expanding cloud:


The CME is not heading directly for Earth. However, NOAA analysts have modeled its trajectory and they say that the expanding cloud could deliver a glancing blow to our planet's magnetic field on Nov. 29th. If so, it might add energy to polar geomagnetic storms already in progress due to the earlier arrival of a solar wind stream. Stay tuned for improved forecasts as the CME approaches.

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