Electromagnetism news

Transient Events in History

At https://phys.org/print410606948.html ... researchers from Kyoto University and Japan's National Institute of Solar Research have used historical records to garner a better insight into the patterns of past solar events and their impact on the earth (such as intense aurorae). Japanese and Chinese documents (no mention of Korean examples of a similar nature) have enabled them to reconstruct a chronology. The study is published in 'Space Weather' (April 2017). For example, an early Japanese record of aurora sightings describes a prolonged event in AD1204.

Rossby Waves

At https://tallbloke.wordpress.com/2017/04/02/waves-on-sun-give-nasa-new-in... ... discusses what might cause coronal mass ejections from the Sun - as they contribute to space weather. See also www.sciencedaily.com/releases/2017/03/170330142242.htm ... where research finds a commonality between weather on earth and space weather. On earth weather appears to react to changes in the jet streams which blow air in narrow currents around the world - somewhat like Rossby waves, movements fueled by the planet's rotation.

Sun, Weather and Climate

The book, 'Sun, Weather, and Climate' (2005) by John R Herman and Richard A Goldberg is a reprint of a book originally published in 1978. It was reprinted on two occasions and published in Russian and Chinese, and seems to have become a classic of its kind, a forerunner of modern climate research. It is of great interest in the study of Earth's climate - hence the need to flag it up again (as I had a post in 2013 on the same book). William provided the link below.

Sat Nav and Aurorae

At https://tallbloke.wordpress.com/2017/03/15/auroras-affect-sat-nav-system... ... This is an interesting one as aurora are produced when gas particles in the Earth's atmosphere collide with charged particles emitted from the Sun. The resulting plasma turbulence has long been thought to be the reason why global navigation satellite systems go awry. New research casts doubt on this view.

Meteors Humming

Gary sent in this link - www.dailymail.co.uk/sciencetech/article-4201328/Study-identifies-cause-s... ... on the day after Wikipedia banned the Daily Mail claiming it was a source of fake news. You may wonder why Wikipedia, also renowned as a source of fake news, would bother - but you have to take into account the thought police that patrol the pages of Wikipedia (looking out for anti-CAGW postings).The David Rose 'bombshell article' has really rattled the gilded cage of the CAGW faithful. 

Mid Holocene Anomaly

At https://phys.org/print405675862.html ... we learn there was what is thought to be advanced solar activity smack bang in the middle of the Mid Holocene Warm Period. The evidence comes from tree rings in long lived bristlecone pine trees. The researchers suggest it may involve a change in the Sun's magnetic activity (a super flare) or a number of solar flares arriving in a burst, one after the other.

Blue Jets Lightning

  ... an image of a blue jet of lightning leaping up from the atmosphere of the earth. The picture was taken by a Danish astronaut onboard the International Space Station.

Here is an image of the green comet coming our way this weekend. It has lost its tail as it rounded the sun - like Samson, it is bald.

CMEs

At https://wattsupwiththat.com/2017/02/01/still-far-more-worrisome-than-glo... ... just noticed this one after visiting Anthony Watts place. Solar physicist Leif Svalgaard informed Anthony of the possibility of a Carrington style event (a large CME in 1859). It could bring down the electricity grid system and damage satellites etc (the same thing that regularly pops up when this sort of event is mentioned and surprisingly given short shrift by some of the commenters).

plasma behaviour

At www.thunderbolts.info/wp/2017/01/27/at-any-scale/ ... we have further clarification on plasma behaviour which is useful as we lead up to our speaker meeting in April which will be addressed by Bob Johnson. This time the issue is the so called 'fast radio bursts' - fast release of energy that lasts just a few milliseconds. Obviously, this was an unknown until the advent of recent instruments. Blink and you would miss them.