Some scattered clouds around teatime, but managed to get two video runs of each half of the Sun and then stack and combine them as a mosaic.
Just about to use a 2.5 x PowerMate Barlow to zoom in on AR 2130 when it clouded over again!
Lunt LS60T CaK B1200 scope with DMK 41AU monochrome CCD camera mounted on Ioptron ZEQ25GT. 1800UT.
AR 2130 produced:
1st August 2014: M2, C4.
31st July 2014: M2, C3, C1, C1, C1.
AR 2127 produced:
1st August 2014: M1
31st July 2014: C1
AR 2132 produced:
1st August 2014: C8
Solar flares – radiation (mostly X-ray and extreme UV, some synchotron radio around 10cm wavelength) produced by magnetic reconnection of field lines in the corona. Arrives at Earth 8.3 minutes after event.
X class: Large flare: disruption of satellite communication, GPS and power grids. Radiation risk to astronauts. Planes diverted from polar routes.
M class: Medium flare: brief radio blackouts at high latitudes
C class: Small flare: usually no consequences on Earth
(This is a log scale, ie a M has 10x the energy of a C but within class C and M, there are 9 linear subdivisions. X class keeps going beyond X10 right up to X28 – the largest recorded in recent years).
Coronal Mass Ejection – a magnetic reconnection event powerful enough to eject not only radiation but plasma (ie high speed protons, electrons and alpha particles [helium nuclei]) and entrained magnetic fields from the Sun’s corona. Radiation arrives at 8.3 minutes but slower particles arrive about 2-3 days after event.