L'éruption solaire provoque des aurores boréales 6-aout-2010

Sun eruptions spit Plasma at Earth

2 days ago

The last solar maximum occurred in 2001. The solar eruption is especially ... Isn't this the plot to 2012?

Une puissante éruption solaire a

causé des aurores boréales -

dans l'hémisphère Nord

Ces éruptions solaires ne causent

généralement aucun dommage à la Terre

mais les scientifiques de la NASA ont

prévu qu'en 2013, le soleil entrera dans

un nouveau cycle qui rendra ces

phénomènes plus dangereux pour la Terre

source: fr.news.yahoo.com

Tsunami solaire : la Terre touchée

dans la nuit du 3 au 4 août Vendredi 6 août

Ces atomes chargés électriquement ont alors parcouru pas moins de 150 millions de kilomètres avant de percuter la Terre

http://fr.news.yahoo.com

"It's the first major Earth-directed eruption in quite some time," Leon Golub, an astronomer at the Harvard-Smithsonian Center for Astrophysics, said in a statement.

source: news.cnet.com

Reader comment: Sun storm ....

I'm wondering if electrical equipment would be safe if it was turned off while the flare passes over

(assuming this is a big one). If you've ever scene the movie Broken Arrow, there is a bit were JT asks his gang of villains to switch off their gadgets and wait for the EMP from the nuke to pass by. Is this just hollywood crap or would electrics be safer in an inert mode. But then we'd have to know precisely when to switch things off I guess.

Answer:

You are correct in your suspicions, you are indeed describing hollywood crap.

The effect from EMPs and solar phenomena is such that electrical currents are induced in the circuitry of electronics. Whether the devices were on or off wouldn't make any difference; they still have circuitry with conductive wires where a voltage can be induced.

Solar activity usually only effects large things, like the power grid. Thats why they can cause blackouts: by induced current in the grid that causes malfunction. EMPs are stronger and could potentially effect even little things like your cell phone. But the thing to remember is that they destroy electronics by inducing currents that are too high for the circuitry to handle, thusly breaking them. So on/off isn't relevant. source: news.cnet.com/8618

Comment SL:

Wrap sensitive electronic devices in Aluminium

grounded or not, would probably avoid induced

current. Power breaks will happen because of

destroyed Transformators.

International Living with a Star (ILWS) meeting in Bremen, Germany were more than 25 of the world’s most technologically-advanced nations have gathered to deal with an ever increasing activity in the surface of the sun.

NASA forecasts that the solar events will peak around 2013 and is feared to affect our daily life. NASA says that it would affect communications to weather forecasting to financial services—depend on satellites and high-tech electronics.

http://wwnn.co.uk

Aurora photo gallery 2010: spaceweather.com/aurora

http://www.spaceweather.com

Picture by Satellite SDO

SDO: Solar Dynamics Observer NASA

SOURCE: http://sdo.gsfc.nasa.gov

Spacequakes Rumble Near Earth

Rumbles without sound

Auroras rain down

Magnetic fields shake

Beware the spacequake

July 27, 2010: space weather

A spacequake is a temblor in Earth's magnetic field.

It is felt most strongly in Earth orbit, but is not exclusive to space. The effects can reach all the way down to the surface of Earth itself.

"Magnetic reverberations have been detected at ground stations all around the globe, much like seismic detectors measure a large earthquake," says THEMIS principal investigator Vassilis Angelopoulos of UCLA.

It's an apt analogy because "the total energy in a spacequake can rival that of a magnitude 5 or 6 earthquake," according to Evgeny Panov of the Space Research Institute in Austria. Panov is first author of a paper reporting the results in the April 2010 issue of Geophysical Research Letters (GRL).

The surprise is plasma vortices,

huge whirls of magnetized gas as wide as Earth itself, spinning on the verge of the quaking magnetic field. "We believe the vortices can generate substantial electrical currents in the near-Earth environment."

Spacequakes generate currents in the very ground

we walk on. Ground current surges can have profound consequences, in extreme cases bringing down power grids over a wide area.

source: science.nasa.gov

U.S. $100 million to avoid solar storm grid break

NASA scientists warned recently that high-energy electric pulses from the sun could cripple our electrical grid for years, causing billions in damages. In fact, the House is so concerned that the Energy and Commerce committee voted unanimously to approve a bill allocating $100 million to protect the energy grid from this rare but potentially devastating occurrence foxnews.com/scitech