Today is the Summer Solstice, the longest day in the Northern hemisphere and the shortest day in the Southern. That officially happens at 20...

On March 30, 2022, active region 12975 was the site of an X1.3 flare. Here is the daily movie in AIA 171 from that day. AR 12975 is in the u...

Active region 12887 emitted an X-class flare today at 1555 UTC. There also appears to be a filament eruption (the precursor to a coronal mas...

At 1430 UTC (10:30 am ET) on July 3, 2021, the first X-class flare (actually an X1.5 flare) of Solar Cycle 25 was seen on the Sun. There...

Can't get enough solar eruptions, especially from SDO? Here's a nice video from the Solar-Terrestrial Center of Excellence in Brusse...

Yesterday we saw an M6.5 flare from active region 12372 followed by a filament liftoff, which turned into a coronal mass ejection, which b...

Active Region 12297 was the site of two M-class flares yesterday and an X2.1 starting today at 1611 UTC (12:11 p.m. ET). AR 12297 is in th...

Monica Bobra of Stanford University and Chau Dang of Scientific American published a blog article about flares seen by SDO . You can see w...

Active Region 12192, which was the location of 6 X-class and several M-class flares in late October, is coming back for an encore. Here i...

What an active region 12192 has been! Six X-class flares in 9 days. Here is an HMI image of AR 12192 at 1615 UTC on 23-Oct-2014. You can se...

Active Region 12192 has grown to 2410 millionths of a solar hemisphere (0.2410 % of one side of the Sun), making it one of the larger active...

Stationkeeping burn #9 will happen today (September 10, 2014) at 2215 UTC (6:15 p.m. ET). SDO data will be unavailable for about 30 minutes ...

On Aug. 24, 2014, the sun emitted a mid-level solar flare, peaking at 8:16 a.m. EDT. NASA's Solar Dynamics ...

Active Region 12087 rotated into view yesterday and produced 2 X-class flares. This morning it produced an M8 and an X1 flare about an hour ...

This morning a new active region rotated into view on the solar disk and promptly emitted two X-class flares. Here is a movie of the firs...

Wondering what else we need to know to understand X-class solar flares? Join SDO and others on a Google+ Hangout today at 2:30 pm ET. We wil...

This morning the Sun released an X4.9 flare from AR 11990 at 13 S, 78 E on the solar disk. It can be seen in this AIA 94 image as the bright...

Today the Moon passed between SDO and the Sun from 1331-1556 UTC (8:31-1056 am ET). At 2.5 hours in length, it was the longest lunar transit...

As AR 11893 rotates over the limb of the Sun it erupted with a X-1 flare at 1030 UTC (5:30 am ET) this morning. Here is a detail from the A...

Active region 11875 let loose an X2.3 flare. Strong radio emissions were also measured during this flare. The flare started at 2142 UT (5:42...