36 minutes ago, Samrau said:

Is this a belated message from the C1.30 flare? I can't see anything

The time fits:

Space Weather Message Code: ALTTP2

Serial Number: 1424

Issue Time: 2025 Aug 16 1206 UTC

ALERT: Type II Radio Emission

Begin Time: 2025 Aug 16 1048 UTC

Estimated Velocity: 620 km/s

It was a new sunspot emerging underneath a smaller filament which expelled some matter, but I think most of it got recaptured.

Edited August 16Aug 16 by Rudolph
Punctuations

5 hours ago, hamateur 1953 said:

Edit: I remember a similar incident a couple of years ago when we got a Type II from a farside event. I think @Philalethes explained how this might be possible from a CME hitting the corona and the x rays and longer radiation being line of sight wouldn’t be visible necessarily. Hoping I got that right. If not please correct me. No big deal. 😊

I can certainly post this wonderful illustration I made to clarify in any case:

This is meant to represent how as a CME moves through the corona, there's an emission of longer and longer wavelength (lower frequency), and how rapidly the wavelength changes is what's thus used to estimate the speed of the CME. As you can see it is indeed possible to some extent in principle to register this from events that aren't directed directly towards us, certainly for events at or near the limb, but from the far side would be harder, as the Sun itself would tend to be too much in the way, but depending on strength and direction it might be possible.

Flare activity on the far side of the eastern limb.

We're hopefully heading into C levels again later today. Old 14167 is about to fully rotate into view north of the equator, and 14164 or a new region that formed on the farside is trailing behind 14188.

In 1-3 days we'll get 14161 and 14170 joining as well. 14170 has flown across the farside disk but slowed down as it got close to 14161, they'll probably show up together at the same latitude as 14188 and form a single new region.

Edited August 19Aug 19 by Rudolph
Fixed time estimate

Visible active regions.

The white arrows indicate several active regions, about to enter the eastern limb, connected by loops.

7 hours ago, Jhon Henry Osorio Orozco said:

The white arrows indicate several active regions, about to enter the eastern limb, connected by loops.

Do you think we can expect class X flares with abundant coronal mass ejections?

7 hours ago, Jhon Henry Osorio Orozco said:

The white arrows indicate several active regions, about to enter the eastern limb, connected by loops.

Seeing that in 94 ang is really impressive! Wouldn’t have expected it tbh. We are overdue for X class with CMEs. Would be nice. Particularly with the moon nearly gone now!

M1 )

1 minute ago, Samrau said:

M1 )

A long duration M-flare from a (largely) eclipsed region is quite neat.
I'm putting my bets on another impressive CME.

The location of the flare coincides well with the return of AR4170, which should come into view in the next couple of days.

Edited August 22Aug 22 by Echound

Since this is still behind the limb and will be coming over limb within the next 20-36 hours could this have been a stronger M flare as what we now see? As in M5+?

Or because it’s so close to the edge we were able to measure its full flare?

1 minute ago, Kalamer said:

Since this is still behind the limb and will be coming over limb within the next 20-36 hours could this have been a stronger M flare as what we now see? As in M5+?

Or because it’s so close to the edge we were able to measure its full flare?

It is difficult to say, with each flare the intensity and twisting of magnetic fields weakens. But if there are several potential flare areas or some tension remains in flared ones, then it is possible that they will flare up again.

M1.8 -moderate.

I remember three cases where post-flare coronal arches formed after an outburst, and no more flares occurred after that. I hope that this group will not experience the same thing, and that it will continue to produce flares.

Finally getting around to seeing the latest events, nice to see a big boom. I guess its better seeing the activity nearing the east limb than going over the western limb.

There is the region already noted producing the M1.8 flare, old 4161 and 4170 which are on the limb now.

Then there was the large eruption from the 21st. The source of that event looks to have been somewhere around where old regions 4165 and 4168 were. We won't see that on the limb until the 25th or 26th though.

Edited August 22Aug 22 by Jesterface23

4 hours ago, Kalamer said:

Since this is still behind the limb and will be coming over limb within the next 20-36 hours could this have been a stronger M flare as what we now see? As in M5+?

Or because it’s so close to the edge we were able to measure its full flare?

Typically limb events exhibit a couple of distinctions from ones on our side: The rise time is more gradual and they seem to be underrated by maybe 20% I have read somewhere. In any event it’s promising…

One thing worth to mention - farside sunspots (especially the further one) will be seen from Solar Orbiter much quicker (tomorrow?) before they will face us. So we don't have to wait many days until we get full view of them.

You can see some farside sunspots in images taken yesterday by the perseverance mars rover. Keep in mind that the image has not been aligned so that north is up. I think north is to the roughly to the right.

1 hour ago, Aten said:

You can see some farside sunspots in images taken yesterday by the perseverance mars rover. Keep in mind that the image has not been aligned so that north is up. I think north is to the roughly to the right.

To understand the location of Mars relative to the Earth. View from above

Edited August 23Aug 23 by Samrau
Correction

14 minutes ago, Samrau said:

To understand the location of Mars relative to the Earth.

Got confused for a second, why your position is on the sun.^^

1 hour ago, Aten said:

You can see some farside sunspots in images taken yesterday by the perseverance mars rover. Keep in mind that the image has not been aligned so that north is up. I think north is to the roughly to the right.

That's not exactly promising if those small specs in the bottom right are 14161 and 14170 👀

2 hours ago, Aten said:

You can see some farside sunspots in images taken yesterday by the perseverance mars rover. Keep in mind that the image has not been aligned so that north is up. I think north is to the roughly to the right.

Pretty darn impressive that rovers camera can capture a few sun spots!

Looked it up, actually pretty impressive camera:

Mastcam-Z

Tech Specs - Mastcam-Z

Get a high-level overview and cut-away views of the Mastcam-Z subsystems and their behaviors based on CAD models, and Mastcam-Z’s major characteristics.

42 minutes ago, Rudolph said:

That's not exactly promising if those small specs in the bottom right are 14161 and 14170 👀

I compared the image from Mars and the latest SDO image.

I hope I turned the image from Mars correctly

13 minutes ago, Samrau said:

I compared the image from Mars and the latest SDO image.

I hope I turned the image from Mars correctly

Is the smaller spot on the right 14188, middle top is 14191, and the large spot underneath it is 14170/14161?

Edited August 23Aug 23 by Rudolph

Whatever it is, we are beginning to see the leading edge finally coming into view in most of our available renderings. Nice spewing btw.

Edited August 23Aug 23 by hamateur 1953
Typo