Good timing & thanks!

I'm working on a long form 'filament' clip which is very pretty to look at!

Great job Sean! Wow, that June 11th video....Amazing!

Have noticed an anomaly in the Solar Dynamics Observatory daily intensitygram images, for the past four days. On the righthand side of the images there is an odd, diagonal line across the solar disk, which is lighter in color than the surrounding surface of the Sun.
I suspected this was a transitory fault, perhaps caused by the intrusion of an energetic particle into the camera. This seems unlikely, though, after three, day-after-day repetitions, in the very same position against the solar disk. It also seems unlikely that an imaging processing artifact would persist like this, without correction, or even comment. Any ideas on what could be causing this anomaly?

link?

SDO Link

It's pretty obvious in the thumbnail visible at http://spaceweather.com/ The Gong H-alpha monitoring network doesn't show anything there. http://halpha.nso.edu/

All the latest, including several versions of the Intensitygram mentioned in the OP on this issue:
https://sdo.gsfc.nasa.gov/data/

It's been two weeks, now, since the anomaly was discovered in SDO images. It's still visible in today's daily intensitygram images. The Joint Science Operations Center, at Stanford, has had, and still has an advisory, in red, at the top of their webpage. They admit that that the anomaly can not be removed by image processing, and that they can not explain the source or cause of the anomaly.

Please find a link to the JSOC website, below:

JSOC

I'm honestly not seeing this artifact, can someone post an actual image that shows it?

The tone of some of these messages is flirting with rule 2.6 IMHO.

Here's a clip off of Spaceweather with the artifact highlighted. It's a diagonal strip across the disk.

Click to view attachment

It's faint, but I can see it in both the Spaceweather images ( http://spaceweather.com/images2018/30aug18...i687mccdvc5rrq4 ) and here: https://sdo.gsfc.nasa.gov/assets/img/latest...t_1024_HMII.jpg

Roughly the 3 to 4 o'clock position. It hasn't moved so it must be an artifact as JSOC says.

Could somebody post an actual image with the artifact annotated? I still don't know what you're talking about.

[edit: sorry, I missed Richard's post. If that's what we're talking about, I'm not sure what the fuss is over. It's not like you could mistake that for a nature feature and it's so faint I can barely see it.]

The anomaly was much more noticeable, earlier in the month. The fact that it changes, yet persists seems possibly significant, in itself. Please find a link, below, to the SDO image from August 17th:

SDO Archive

I'd suggest calling it an "artifact" as the JSOC does, rather than "anomaly," because the latter word means "very serious problem" to space engineers and this doesn't seem to rise to that level. It's annoying to have a new artifact that can't immediately be dealt with in calibration, but no more than that; I can't see this affecting science. I will be curious to learn what JSOC eventually has to say about what they think caused it. My money's on an unwelcome guest in the form of a teeny speck of dust somewhere.

If you read the description of the instrument at http://hmi.stanford.edu/Description/hmi-ov...i-overview.html you'll find that it's basically a camera that takes images in 12 very narrow bandpasses centered at 617.3 nm, produced by a tunable filter with a bunch of moving parts. There's also an image stabilizer inside the instrument. Pretty complicated, and presumably with a lot of possible ways to go wrong.

I'm not sure how close to raw the images we see are, probably not very close.

Click for video...



From November 29/30 2020

Just wow....Nothing short of spectacular...thank you Sean