Wednesday, September 13, 2017

Newsweek: The sun has gone wrong and scientists don't know why

The sun goes through 11-year cycles of solar activity. Right now should be the quietest phase of the current cycle but 4 large flares this past week included the largest since 2008. On earth, they cause geomagnetic storms that can be disruptive to radio communications and power grids and may also have some effect on weather and earthquake activity.

www.newsweek.com    


9/10 UPDATE:  On Sept. 10th, departing sunspot AR2673 erupted, producing a powerful X8-class solar flare. The explosion propelled a CME into space and accelerated a swarm of energetic protons toward Earth. Both are visible in this coronagraph movie from the Solar and Heliospheric Observatory (SOHO):

The many specks in this movie are not stars--they are solar protons striking SOHO's digital camera. Almost two days later these protons are still streaming past our planet, causing a moderately strong (S2-class) solar radiation storm. 

What made this flare so 'radioactive'? It has to do with the location of AR2673 at the time of the explosion. The sun's western limb is magnetically well-connected to Earth. Look at this diagram. Magnetic fields spiraling back from the blast site led directly to our planet, funneling these energetic protons Earthward.

Normally, solar radiation storms are held at bay by our planet's magnetic field and upper atmosphere. On Sept.10th, however, there was a "ground level event" (GLE). Neutron monitors in the Arctic, Antarctic, and several other high latitude locations detected a surge of particles reaching all the way down to Earth's surface

No comments :

Post a Comment


Please keep your comments polite and on-topic. No profanity

R E C E N T . . . C O M M E N T S

Springfield Vermont News is an ongoing zero-income volunteer hyperlocal news gathering project. No paid advertising is accepted on this site but any Springfield business willing to place a link to this news blog on their site will be considered for a free ad here. Businesses, organizations and individuals may submit write-ups and photos about any positive happenings here in Springfield that they are associated with and would be deemed newsworthy. Email the Editor at ed44vt@gmail.com.

Privacy statement: This blog does not share personal information with third parties nor do we store any information about your visit to this blog other than to analyze and optimize your content and reading experience through the use of cookies. You can turn off the use of cookies at anytime by changing your specific browser settings. We are not responsible for republished content from this blog on other blogs or websites without our permission. This privacy policy is subject to change without notice and was last updated on January 1, 2017. If you have any questions feel free to contact Springfield Vermont News directly here: ed44vt@gmail.com

Pageviews past week

---

Sign by Danasoft - For Backgrounds and Layouts