We're pleased to present: Episode #4 of the NW7US Space Weather and Radio Propagation Podcast.

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Details About This Podcast

In this episode, Amateur Radio Operator, Tomas David Hood (NW7US) discusses with Dr. Penn of the National Solar Observatory the startling yet convincing trend revealed in research of magnetic strengths of sunspots over the last thirteen years. The trend indicates a strong possibility, if the trend continues, that sunspots will disappear by the year 2015!

Additionally, space weather and propagation conditions through August are reviewed, and the outlook for this coming week is presented.

Do you have any thoughts, suggestions, comments, or questions about this podcast, or of the podcast, in general? Please use the feedback form to send your correspondence to Tomas, NW7US.

A version of this podcast will be made available in a format ready for amateur radio repeater and HF transmission in the form of an information bulletin package. Details will be posted at the main Podcast website.

Dr. Matthew Penn

Image of Dr. Matthew Penn - In this picture, Dr. Penn is working with the the NSO Array Camera, which is the workhorse infrared detector at the McMath/Pierce Solar Telescope. Penn uses it to map the magnetic fields in sunspots using sensitive infrared spectral lines, as well as for studies of the solar atmosphere.

Papers and Articles by M.Penn

New - September 2, 2009: Dr. Penn responds to a general question regarding data integrity.

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P. LeMay  - just listened to your Aug 2009 podcast   |216.232.23.xxx |2010-01-17 03:07:31 Just found your site tonight while looking for information about something else. But as someone who took introductory astronomy as an interest course in my last year of undergrad away back in 1979, I was quite interested in listening to your show about disappearing sunspots and the publication. I have forwarded it on to a friend in Hawai'i, physicist Nassim Haramein, who is quite interested in the subject. Reply 0 0

John Green  - I just don't see it   |72.173.75.xxx |2009-12-25 20:30:27 There have been many times in history where there has been extremely low solar activity. I don't see this low period that we are having now to be any indication of a future that is going to be completely absent of sunspots. I see what is going on right now to be a calm before one heck of a storm. Look at the recent activity that we have had. If you look at the beginning of cycle 19, it started out very low as well. Yes, this has been an unusual start to a sunspot cycle, but I don't see that it reinforces the evidence of a future without sunpots. 73, John, AD7VH Reply 0 0

Shane Justice  - Systems Engineer   |24.121.84.xxx |2009-09-11 12:14:48 Just a note to tell you how much I enjoyed your podcast on Sunsposts with Dr. Penn. Fascinating!! I am looking forward to podcast #5!! Great production value- nice to hear your whole family involved. 73, Shane KE7TR Reply 1 0

Michael Ronayne  - Solar Spectroscopy 101   |71.172.96.xxx |2009-09-05 12:52:03 Tomas, Thank you for the podcast of your interview with Dr. Martin Penn. I have already played it several times and plan to listen to it again. After you have podcast the second part of the interview next week would is it possible to issue a special edition podcast the interview in its entirety? You are providing an extremely valuable service by this interview, while the mainstream media is going to great lengths to ignore conditions on the Sun. Fortunately, that is changing as NASA is now paying official attention to the work of Drs. Livingston and Penn. NASA: Are Sunspots Disappearing? http://science.nasa.gov/headlines/y2009/03sep_sunspots.htm If you do issue a complete podcast of the entire interview, would you consider placing a copy in http://www.archive.org/details/audio_tech? If the second part of the interview is as good as the first, and Drs. Livingston and Penn are proven correct, the interview may well be of great value to future science historians as it provide... Reply 0 0

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