Posts Tagged ‘cme’
While many are talking about how Solar Cycle 24 is the weakest since the Maunder Minimum (the period starting in about 1645 and continuing to about 1715 when sunspots became exceedingly rare, as noted by solar observers of the time — see this Wiki entry), there are moments when activity on the Sun strongly increases, providing brief moments of excitement.
Here is a case in point, witnessed by the Solar Dynamics Observatory (SDO; see SDO Mission) on June 7, 2011, when the Sun unleashed a magnitude M2 (a medium-sized) solar flare with a spectacular coronal mass ejection (CME). The large cloud of particles mushroomed up and fell back down looking as if it covered an area almost half the solar surface.
SDO observed the flare’s peak at 1:41 AM ET. SDO recorded these images in extreme ultraviolet light that show a very large eruption of cool gas. It is somewhat unique because at many places in the eruption there seems to be even cooler material — at temperatures less than 80,000 K.
This video uses the full-resolution 4096 x 4096 pixel images at a one minute time cadence to provide the highest quality, finest detail version possible. The color is artificial, as the actual images are capturing Extreme Ultraviolet light.
It is interesting to compare the event in different wavelengths because they each see different temperatures of plasma.
Credit: NASA SDO / Goddard Space Flight Center
Video: http://g.nw7us.us/1aOjmgA – Massive Solar Eruption Close-up (2011-06-07 – NASA SDO)
Episode #104 Audio (Listen Now):
- Pete is back on the show along with Russ
- Hamvention 2013 is happening May 17-19, 2013 in Dayton, Ohio. LHS reached the donation goal and thus will be in the Hara Arena. Thanks to Sierra Radio Systems for their incredibly generous donation that put us over the top. We will be talking with George from Sierra and Nick from Pignology in Episode #105. It’s a show you DO NOT want to miss.
- Bill, KA9WKA, has announced that he is also going to be on hiatus for a while. Therefore, we now have an opening for a show notes taker and keeper of all knowledge! If you’d like to be that person, please send us an e-mail or get in touch with Pete or I in the IRC channel.
- Website that lists known Linux Events.
- We have a pre-recorded interview with Steve Nichols, G0KYA (also AB8ZV) the Author of STEALTH ANTENNAS an RSGB publication.
- Factors in HF Propagation
- Factors in HF Propagation
- Propagations changes over daily and monthly bases
- Solar Cycle 24 and its progress
- HF Propagation programs
- Topic for short discussion: How is Ham Radio Free and Open Source?
- http://www.linuxjournal.com/ham (2010)
- http://www.linuxjournal.com/content/open-source-ham-%E2%80%93-free-range-chicken (2009)
- Both articles are more of a teaser for Linux Journal’s HAM section.
- Pro arguments:
- Home-brew your own
- Communications open worldwide
- No need for outside infrastructure
- Con arguments:
- Need a license from “The Man” to operate
- Many restrictions (band plan, op procedures, etc)
- Not Free, as in beer (license, equip, etc)
- Therefore, is it the ‘YANG’ to Linux’s ‘YING’?
- Due to the length of the interview with Steve Nichols, feedback will be moved to after the interview in Episode #105.
- Contact Russ at [email protected] or [email protected]
- Listen to the live stream every other Tuesday at 8:00pm Central time. Check the LHS web site for dates.
- Leave us a voice mail at 1-909-LHS-SHOW (1-909-547-7469), or record an introduction to the podcast.
- Sign up for the LHS mailing list.
- LHS merchandise is available at the Merch link on Web site. Check out the Badgerwear or buy one of the other LHS-branded items at PrintFection.com/lhs or Cafe Press. Thanks!
- Thanks to Dave from Gamma Leonis for the theme music.
- “Alive” by Bright September
- “So Called a Hero” by Bright September
We sometimes on this show attempt to bring you interesting interviews with people who are both computer literate and ham radio literate at the same time. In this case, we bring a scholar, physics buff, aerospace engineer and brilliant guy, Steve Nichols (G0KYA), to discuss the science of radio wave propagation. No need to turn the show off before it even begins. Steve makes understanding the Earth’s atmosphere, its magnetic field, and a ton of stuff about the sun simple and approachable. No mind-bending equations, no physics lectures, just some great information for anyone interested in learning how a radio signal gets from here to there. A bunch of follow-up information in the form of books and Web sites are provided as well, links to which will be in the show notes, for anyone who wants to further their education. Thank you as always to our loyal listeners. Make sure to tell a friend next time you’re out for a cold one. The more the merrier.
73 de The LHS Guys