Thursday, May 30, 2013
Tuesday, May 21, 2013
Wednesday, May 15, 2013
Today at 2:10 pm ET SDO will do a momentum management burn. We will fire the thrusters to force the reaction wheels to go to the desired spin rates. We will be off-line for about 30 minutes.
Tuesday, May 14, 2013
Thanks to Steele for putting this together.
The Sun unleashed another X-class flare last night, the third in 24 hours. They have all come from the same active region, which is AR 11748 but the flare was at coordinates N15 E77. This X3.2 flare peaked at 0111 UTC on 14-May-2013 (9:11 pm ET on 13-May-2013). Here are some stills from AIA 1600 and 1700 and the HMI continuum. The 1600 image at upper left is from later in the flare (0200 UTC) and shows the loops in 1600, with a bridge moving toward the upper right of the frame.
The 1700 image at upper right is a little earlier (0148 UTC) but is the best time to see the wisps of coronal loops in this channel. There is a little wisp of light above the loops that is also seen in the 1600 passband on left.
The HMI continuum image at left (also at 0200 UTC) shows the sunspot that is producing these flares. The movies show that the sunspot is changing, the two small groups on the right merging and the elongated spot on the lower left expanding out to join them.
Great times ahead for this active region!
Monday, May 13, 2013
For a new view of a flare, here is the AIA 1600 channel for 0248 UTC 13-May-2013. It shows a nice set of loops rising over the flaring region, which is just over the limb. This channel measures C IV emissions. These loops are about 26 Mm (16 million miles) high, a little over twice the diameter of the Earth. They are visible about 21 minutes after the peak in the X-ray irradiance.
The same region has produced another X flare, this one an X2.8! I hope it keeps this up as it rotates into view.