Sun getting bubbly: Coronal Mass Ejection may hit Earth

We had "yellow" level geomagnetic activity on the sun last night, and more may

come tonight and tomorrow night. Its coming from Sunspot 953, which is about 3 times the size of the Earth.

Sunspot 953 is crackling with mild

B-class solar flares. Credit: SOHO/MDI

Image of sunspot 953 taken today by Sebastien Kersten of Le Cocq, Belgium:

Here is the dispatch:


Date: April 28, 2007 9:24:59 AM CDT


Subject: BBSO Solar Activity Warning 28-APR-2007 14:19:18 UT

Region NOAA 10953 is currently beta-gamma magnetic class, and may increase in complexity.

The region is bright in H-alpha as well. This region has a chance of producing M-class


NOAA 10953, S10 E41. Beta-gamma region. Position as of April 28, 2007 at 13:30 UT.

And this is in the middle of our solar minimum, indicating our sun still has a few belches to pass out before completely settling down.

One of the best tools we have is the ACE Spacecraft, which monitors the sun 24/7 and provides us with a plethora of real-time data, of the magnetic

field, the solar wind, and  inter-galactic cosmic ray counts.

For the latest "dial" info (including our "space weather stoplight") go to

For the latest 10-minute averages of the Boyle Index from realtime ACE

spacecraft data, go to

Some guides to interpret the gauges

If the hourly-average of the Boyle index exceeds 110, then Kp 4-6 storms

will likely occur within the next three hours

If the hourly average of the Boyle index exceeds 200, then major magnetic

storms will occur within the next three hours

If the hourly average of the Boyle index exceeds 250, major low-latitude

auroras will occur within the next three hours.

A magnetic storm generally occurs about an hour or two after the CME arrives at Earth, which is roughly 26-48 hours *after* a major solar flare. The Boyle Index is derived from real-time ACE spacecraft data, which gives about 45 minutes of warning before it hits the Earth.

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Thomas Miller
April 28, 2007 5:18 pm

Could this produce anything like what we saw several years ago when the night sky turned all sorts of colors?

April 28, 2007 6:04 pm

Absolutely it could produce mid latitude auroral displays…if you want to be advised of them go to and sign up for the email or phone service

June 27, 2007 1:58 am

NOAA 10953 had several solar flares, shown by the STEREO space-craft. This link shows a solar tsunami after one of the flares in 3 dimensional anaglyph gif movie format as generated by me from the STEREO data:

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