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+--- Thread: A GASH IN THE SUN'S ATMOSPHERE - March 2018 (/thread-529.html)
A GASH IN THE SUN'S ATMOSPHERE - March 2018 - VK4ADC - 14-03-2018
A GASH IN THE SUN'S ATMOSPHERE:
A canyon-like hole has opened in the sun's atmosphere, and it is spewing a broad stream of solar wind toward Earth. NASA's Solar Dynamics Observatory is monitoring the structure:
This is a "coronal hole"--a region where the sun's magnetic field opens up and allows solar wind to escape. Coronal holes appear, in various shapes and forms, several times each month. This one is unusually wide, stretching more than 800,000 km across the face of the sun.
NOAA forecasters say there is a 55% chance of G1-class geomagnetic storms when the solar wind stream arrives on March 14th or 15th. G1-class storms are relatively minor and have little effect on satellites and global power grids. However, they can disorient animals that migrate using magnetic cues at high latitudes and usually spark bright auroras around the Arctic Circle.
From http://www.spaceweather.com/
PS :
Some media outlets have reported that Earth is expecting a “massive magnetic storm” on March 18. That’s wrong, according to the National Oceanic and Atmospheric Administration (NOAA). And they would know: Not only does NOAA help people build forecasts for weather here on Earth, they also predict space weather events like geomagnetic storms.
"This story is not plausible in any way, shape or form," Bob Rutledge, who leads NOAA's Space Weather Forecast Center, told Newsweek via e-mail. "Things are all quiet for space weather, and the sun is essentially spotless."
The magnetic storm’s “imminent” arrival was one of Monday morning’s top science news stories, according to Google News. But most coverage appeared to be based on a misinterpretation of a chart posted on Russia’s Lebedev Institute’s website showing a minor uptick in geomagnetic activity on the 18th. That elevated activity is expected to be a minor storm at most. (NOAA’s forecast shows similar readings.)
From : http://www.newsweek.com/no-massive-geomagnetic-storm-will-not-hit-earth-march-18-840647
RE: A GASH IN THE SUN'S ATMOSPHERE - March 2018 - VK6RO - 14-03-2018
Keep an eye on the GOES page here for sudden bangs on the sun
https://www.swpc.noaa.gov/products/goes-x-ray-flux
vk6ro
e&oe
RE: A GASH IN THE SUN'S ATMOSPHERE - March 2018 - VK5TM - 14-03-2018
Ch 10 news tonight "big magnetic storm to hit Earth, will boost the Aurora in the Arctic".
Can't wait to see what they report if we have a really nasty one heading our way.