World of Gems Conference V will be held on September 23 -24, 2017; Loews Chicago O'Hare Hotel
Welcome to the GemologyOnline.com Forum
A non-profit Forum for the exchange of gemological ideas
It is currently Tue Sep 26, 2017 7:01 am

All times are UTC - 4 hours




Post new topic Reply to topic  [ 8 posts ] 
Author Message
 Post subject: Some of you may be able to see aurora
PostPosted: Sat Jul 15, 2017 4:39 pm 
Offline
Gold Member

Joined: Tue Jul 02, 2013 9:00 am
Posts: 1134
Location: Wylie Texas but in Alaska for a while
I will try to post a reply to this thread when there is a good storm expected, that is at high enough levels that some of you have a chance to see it.

(I am guessing that that is a 6 or above.

If anyone is interested in e doing this please reply, it takes a little work to do the screen shots, post them to imgur and create the post..... I do not mind doing it, if there are people who would be interested.

ANYHOW there should be a good display over the next few days.

I am also putting a few sites that you can look at yourself here.

This is the one I look at when I am out shooting, it has a nice block of gthe expected level in an hour...


http://www.aurora-service.org/aurora-forecast/

this one has a nice longer term forcast lower on the page

https://www.spaceweatherlive.com/en/aur ... a-forecast

This one lets you put in a city and see what the cloud cover is expected to be.

https://www.cleardarksky.com/


This one is the current cloud cover you will have to change the location. It is a site for people who fly..... so you can also look at temps....

http://www.usairnet.com/weather/maps/cu ... ka/clouds/



what causes me to start this:



Some of you may see the aurora
Sunspot region 2665 erupted this night with an M2.4 (R1-Minor) solar flare that peaked at 02:09 UTC. It was a long duration and highly eruptive event. More information about the solar flare can be found in the article that we wrote this morning.
The solar flare also caused a minor S1 solar radiation storm which could cause minor issues with HF radio communications at arctic latitudes.
But that's of course not what you came here for to read about. You want to have information about the coronal mass ejection (CME) that was launched during the M2.4 solar flare. You came to the right place!
The solar flare was associated with a very nice asymmetrical full halo coronal mass ejection. While it is not perfectly directed towards Earth (the bulk of the coronal mass ejection is heading to the south-west) we do see a very clear halo outline and that means a reasonable part of the plasma cloud is directed towards Earth, and an impact is to be expected. The animations below shows us the coronal mass ejection as seen by SOHO/LASCO.


The PK levels expected These are GRENICH MEAN TIME>>>>>

A table of expected levels

Image


Where you need to be to see them

Image


Top
 Profile  
Reply with quote  
 Post subject: Re: Some of you may be able to see aurora
PostPosted: Sat Jul 15, 2017 5:27 pm 
Offline
Valued Contributor

Joined: Sat Nov 05, 2016 11:29 am
Posts: 140
Very interesting!
I haven't seen an aurora in decades, but did hear one here about a month ago: I started hearing odd signals on the 6M (50 Megacycle) ham band: Sure enough, there was the telltale raspy sound of aurora!
I wound up working a guy about 120 miles away to the east of me, but it was not direct!
With auroral modulation, it was obvious that I was working him via the North Pole...
Local HF seems to be doing fairly well: The night before last, I couldn't raise anyone on 75M (3.885 Megacycle) AM, but switching to Single Sideband (SSB), I could hear some locals, plus the usual idiot jammers from California, so the band wasn't entirely shut down.
I'll have to turn on the 1970 vintage Swan 250 6M rig and see what I can hear.
Maybe I'll be able to work some more aurora...

-Tom


Top
 Profile  
Reply with quote  
 Post subject: Re: Some of you may be able to see aurora
PostPosted: Sun Jul 16, 2017 8:19 pm 
Offline
Gold Member

Joined: Tue Jul 02, 2013 9:00 am
Posts: 1134
Location: Wylie Texas but in Alaska for a while
It was cloudy last night here in Alaska.

BUT tonight is another possibility

this is the prediction for tonight..... Still pretty god if you are in the northern US.....

Generally the best time is 12:00 - 2:00 AM local time, That is 0900 GMT for ALASKA

Image

It is sunny now, but this is the expected cloud cover for tonight here.

Image


GRRRRRRR....... clouds come in just as it might be dark enough.



I heard from 1 person that appreciated the heads up..... is anyone else interested in me updating this thread if there is a good storm coming?????



If not, I may just add that person to am email list I have of people who want to see my movie clips, I can send an email update quicker...... (no need to post to imgur.....


Top
 Profile  
Reply with quote  
 Post subject: Re: Some of you may be able to see aurora
PostPosted: Fri Aug 04, 2017 3:20 pm 
Offline
Gold Member

Joined: Tue Jul 02, 2013 9:00 am
Posts: 1134
Location: Wylie Texas but in Alaska for a while
Ihe KP index right now (1:00 AM Alaska Time on August 4th are at a 5, and expected to go up to a 6 this evening and into tonight.

Some of you in the norgthern states may be able to see a display tonight.

We are cloud free tonight. We do not have any "Astronomical Twilight:until the 6th, but with a bright display I might be able to see something. I will plan on going out tonight, but it may not happen.

I hope some of you get to see some display.

something

http://www.aurora-service.org/aurora-forecast/


Top
 Profile  
Reply with quote  
 Post subject: Re: Some of you may be able to see aurora
PostPosted: Sat Aug 05, 2017 12:43 am 
Offline
Gold Member

Joined: Tue Jul 02, 2013 9:00 am
Posts: 1134
Location: Wylie Texas but in Alaska for a while
Magnetometers measure the magnetic disturbaqnce.
Each row is a different instrument, further south in longitude. The more rows that are active the further south the Aurora can be seen. They also give you an indication of things are still active.

It is not 8:30 PM and the sun has not set. Things are szetteling down 

Image

This is the KP level for the past day, it also shows that it is setteling down.

Image

This morning there was a second burst of G2 level activity that was supposed to hit around midnight here, that has gone away.
They still expect a 4, but with the sky as bright as it is, I will not go out. :(

Maybe in the next few weeks when the next hole swings around. We are loosing 5 minutes of sunlight a day and it is increasing.


Top
 Profile  
Reply with quote  
 Post subject: Re: Some of you may be able to see aurora
PostPosted: Tue Sep 05, 2017 12:26 pm 
Offline
Gold Member

Joined: Tue Jul 02, 2013 9:00 am
Posts: 1134
Location: Wylie Texas but in Alaska for a while
There is another CME coming in over the next 24 hours or so.
Expected to arrive 9/6 thru 9/7

predict storm levels of KP 6 or possibly 7.

We are supposed to have a break in the clouds in Alaska tonight between midnight and 3am, which is pretty good timing.

Let me know if any of you get a chance to see something.

again links to a site with a good set of tools.


http://www.aurora-service.org/aurora-forecast/

https://www.spaceweatherlive.com/en/aur ... a-forecast


Top
 Profile  
Reply with quote  
 Post subject: Re: Some of you may be able to see aurora
PostPosted: Thu Sep 07, 2017 2:10 am 
Offline
Gold Member

Joined: Tue Jul 02, 2013 9:00 am
Posts: 1134
Location: Wylie Texas but in Alaska for a while
There has been another CME so there should be some good Aoura over the next several days.
But it looks like I am clouded in.


Top
 Profile  
Reply with quote  
 Post subject: Re: Some of you may be able to see aurora
PostPosted: Tue Sep 12, 2017 6:22 am 
Offline
Gold Member

Joined: Tue Jul 02, 2013 9:00 am
Posts: 1134
Location: Wylie Texas but in Alaska for a while
So frustrating.

WE have a break in the clouds tonight, but the KP levels are down.

They are going up tomorrow (so I hope some of you can see something)

BUT we are going to be overcast again.


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 8 posts ] 

All times are UTC - 4 hours


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
Gemology Style ported to phpBB3 by Christian Bullock