posted on Apr, 1 2014 @ 08:11 AM
Ahhh the magnificent power of the sun. She never ceases to amaze me.
On Saturday, March 29th, the magnetic canopy of sunspot AR2017 erupted, producing a brief but intense X1-class solar flare. A flash of extreme UV
radiation sent waves of ionization rippling through Earth's upper atmosphere and disturbed the normal propagation of terrestrial radio transmissions.
Radio engineer Stan Nelson of Roswell, NM, was monitoring WWV at 20 MHz when the signal wobbled then disappeared entirely for several minutes:
Not only are we skirting the edge of several flairs at the same time, the sun also let out a rare magnetic crochet.
A magnetic crochet is a ripple in Earth’s magnetic field caused by electrical currents flowing in air 60 km to 100 km above our heads. Unlike
geomagnetic disturbances that arrive with CMEs days after a flare, a magnetic crochet occurs while the flare is in progress. It arises from the
increased ionisation in the D and E layers of the ionosphere caused by the massive increase in X-ray radiation generated by the solar flare. This
ionisation changes the properties (especially the conductivity) of these ionospheric layers allowing electric currents to flow more easily. It is the
magnetic effect of these currents which produce the jump in the earth’s magnetic field. As the flare declines, the ionospheric layers quickly return
to their previous state, the electric currents in the layers return to normal, and the change in the magnetic field ends. Magnetic crochets are quite
rare because they are only observed during large flares which rise to a peak very quickly. Also, they are mostly observed in locations close to the
sub-solar point (i.e. the point on earth when the sun is overhead). - See more at:
It arrives in minutes as opposed to the slower moving charged particles from a cme that takes days to reach earth.
Does the article mean large as in power output or as in surface area of the cme?