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Kafanica "Kod srećnog samograditelja"

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Ne znam za g. Vukcevica al' mi smo pratili suncevu aktivnost u kontekstu poremecaja koje izaziva u jonosferi a u vezi sa uticajem koji ima na komunikacije na kratkom talasu i ta periodika je 11 godina. Licno sam bio svedok "guhora" (intenzivna promena u jonosferi koji dovodi do trenutnog prekida rasprostiranja kratkih talasa u trajanju od par sati ili vise) izazvanih Suncevom aktivnoscu 1989. (u toku priprema za poslednju konferenciju nesvrstanih u Beogradu). 2000.g. takodje pichvajz, sad se jope intenzivira...

To Ti je poluperioda...

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Ne znam za g. Vukcevica al' mi smo pratili suncevu aktivnost u kontekstu poremecaja koje izaziva u jonosferi a u vezi sa uticajem koji ima na komunikacije na kratkom talasu i ta periodika je 11 godina. Licno sam bio svedok "guhora" (intenzivna promena u jonosferi koji dovodi do trenutnog prekida rasprostiranja kratkih talasa u trajanju od par sati ili vise) izazvanih Suncevom aktivnoscu 1989. (u toku priprema za poslednju konferenciju nesvrstanih u Beogradu). 2000.g. takodje pichvajz, sad se jope intenzivira...

dosta radio amatera po USA prati ovde aktivnost :http://www.solarcycle24.com/index.htm :sarcastic_hand:

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Ma, milina jedna za razmišljanje...

January 2005 was a stormy month--in space. With little warning, a giant spot materialized on the sun and started exploding. Between January 15th and 19th, sunspot 720 produced four powerful solar flares. When it exploded a fifth time on January 20th, onlookers were not surprised.

"We've been hit by strong proton storms before, but [never so quickly]," says solar physicist Robert Lin of UC Berkeley. "Proton storms normally develop hours or even days after a flare."This one began in minutes.

According to space weather theory--soon to be revised--this is how a proton storm develops:

It begins with an explosion, usually above a sunspot. Sunspots are places where strong magnetic fields poke through the surface of the Sun. For reasons no one completely understands, these fields can become unstable and explode, unleashing as much energy as 10 billion hydrogen bombs.

From Earth we see a flash of light and X-rays. This is the "solar flare," and it's the first sign that an explosion has occurred. Light from the flare reaches Earth in only 8 minutes.

Back to the drawing board: If a CME didn't accelerate the protons, what did?

"We have an important clue," says Lin. When the explosion occurred, sunspot 720 was located at a special place on the sun: 60o west longitude. This means "the sunspot was magnetically connected to Earth."

see captionHe explains: The sun's magnetic field spirals out into the solar system like water from a lawn sprinkler. (Why? The sun spins like a lawn sprinkler does.) The magnetic field emerging from solar longitude 60o W bends around and intersects Earth. Protons are guided by magnetic force fields so, on January 20th, there was a superhighway for protons leading all the way from sunspot 720 to our planet.

The sun's magnetic field spirals like water from a lawn sprinkler. The field line emerging from solar longitude 60 degrees west usually leads to Earth.

"That's how the protons got here," speculates Lin. How they were accelerated, however, remains a mystery.

Izvorni tekst sa Nasa sajta:

http://science.nasa.gov/science-news/science-at-nasa/2005/10jun_newstorm/

:brr:

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Mozda ovo nema ama bas nikakve veze a mozda i ima....http://www.smh.com.au/technology/sci-tech/i-see-a-supermoon-rising-but-do-i-see-trouble-on-the-way-20110311-1bqrw.htmlhttp://www.bbc.co.uk/news/world-asia-pacific-12709598

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pogledajte grafike

Global D-Region Absorption Prediction

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Magnetometar

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Xray

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da li ima veze ili ne pojma nemam ali su podivljali blago u istom vremeskom intervalu pogotovo

Magnetometar danas sto je posledica onog Flux pika u X skali od juce :sarcastic_hand:

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http://www.bbc.co.uk/news/world-asia-pacific-12720219Prvo su rekli da nema radijacije, a sad kazu da ima "malo", u kontrolnoj sobi "samo" 1000 puta iznad normale a napolju samo 8 puta vise!?Nije im proradio ni backup of the backup... :(Izvinite ne Off-topic-u

Tih 1000 puta je, i dalje, ispod granica za bilo kakvu zdravstvenu tegobu...Kažu da bi trebalo, još, 1000 puta da bi trebalo da se počne brinuti.Ako sam dobro shvatio, energija koju su osetili po ulicama je 8000 puta veća od one koju su osetili na NZ...

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Uh, opet novi Černobil :scratch_head:

Bojim se da mi je strepnja postala jača od (noćašnje) nade...

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uly 27, 2010: Researchers using NASA's fleet of five THEMIS spacecraft have discovered a form of space weather that packs the punch of an earthquake and plays a key role in sparking bright Northern Lights. They call it "the spacequake."

Spacequakes (animation, 200px)

A spacequake in action. Click to launch a computer-simulated movie created by Walt Feimer of Goddard's Scientific Visualization Lab.

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).

In 2007, THEMIS discovered the precursors of spacequakes. The action begins in Earth's magnetic tail, which is stretched out like a windsock by the million mph solar wind. Sometimes the tail can become so stretched and tension-filled, it snaps back like an over-torqued rubber band. Solar wind plasma trapped in the tail hurtles toward Earth. On more than one occasion, the five THEMIS spacecraft were in the line of fire when these "plasma jets" swept by. Clearly, the jets were going to hit Earth. But what would happen then? The fleet moved closer to the planet to find out.

"Now we know," says THEMIS project scientist David Sibeck of the Goddard Space Flight Center. "Plasma jets trigger spacequakes."

In 2007, THEMIS discovered the precursors of spacequakes. The action begins in Earth's magnetic tail, which is stretched out like a windsock by the million mph solar wind. Sometimes the tail can become so stretched and tension-filled, it snaps back like an over-torqued rubber band. Solar wind plasma trapped in the tail hurtles toward Earth. On more than one occasion, the five THEMIS spacecraft were in the line of fire when these "plasma jets" swept by. Clearly, the jets were going to hit Earth. But what would happen then? The fleet moved closer to the planet to find out.

"Now we know," says THEMIS project scientist David Sibeck of the Goddard Space Flight Center. "Plasma jets trigger spacequakes."

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According to THEMIS, the jets crash into the geomagnetic field some 30,000 km above Earth's equator. The impact sets off a rebounding process, in which the incoming plasma actually bounces up and down on the reverberating magnetic field. Researchers call it "repetitive flow rebuffing." It's akin to a tennis ball bouncing up and down on a carpeted floor. The first bounce is a big one, followed by bounces of decreasing amplitude as energy is dissipated in the carpet.

"We've long suspected that something like this was happening," says Sibeck. "By observing the process in situ, however, THEMIS has discovered something new and surprising."

The surprise is plasma vortices, huge whirls of magnetized gas as wide as Earth itself, spinning on the verge of the quaking magnetic field.

Spacequakes (vortices, 200px)

A THEMIS map of plasma flows during a spacequake. The axes are labeled in Earth radii, so each swirl is about the size of Earth. [larger image]

"When plasma jets hit the inner magnetosphere, vortices with opposite sense of rotation appear and reappear on either side of the plasma jet," explains Rumi Nakamura of the Space Research Institute in Austria, a co-author of the study. "We believe the vortices can generate substantial electrical currents in the near-Earth environment."

Acting together, vortices and spacequakes could have a noticeable effect on Earth. The tails of vortices may funnel particles into Earth's atmosphere, sparking auroras and making waves of ionization that disturb radio communications and GPS. By tugging on surface magnetic fields, 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.

After THEMIS discovered the jets and quakes, Joachim Birn of the Los Alamos National Lab in New Mexico conducted a computer simulation of the rebounding process. Lo and behold, vortices appeared in good accord with THEMIS measurements. Moreover, the simulations suggest that the rebounding process can be seen from Earth's surface in the form of ripples and whirls in auroral displays. Ground stations report just such a phenomenon.

"It's a complicated process, but it all fits together," says Sibeck.

The work isn't finished. "We still have a lot to learn," he adds. "How big can spacequakes become? How many vortices can swirl around Earth at once--and how do they interact with one another?"

Stay tuned for answers from THEMIS.

IZVOR:

http://science.nasa....ul_spacequakes/

:scratch_head:

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iz ovoga gore :scratch_head: napisanog ispada da ovaj grafik ima veze zaista:

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znaci sve preko 100 - 150 je rizicno a iznad 150 :brr:

ako je superbrza proton oluja - stize magnetno polje za 15 minuta ovde.

ako je normalna za 24h-48h .

i ovo gataju kojim redosledom dolazi - jer ne mogu da predvide.

ovo dakle nista ne moze da nam pomogne - mozemo samo da gledamo u Sunce i......... :krstix:

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Zemljotres u Japanu pomerio zemljinu osu za 25cm.ceo tekst:

Initial results out of Italy’s National Institute of Geophysics and Volcanology show that the 8.9-magnitude earthquake that rattled Japan Friday shifted the earth’s rotation axis by about 25 centimetres.INGV’s report, which came hours after the devastating incident, is equivalent to “very, very tiny” changes that won’t be seen for centuries, though, Canadian geologists say.Only after centuries would a second be lost as each day is shortened by a millionth of a second, according to University of Toronto geology professor Andrew Miall.“Ten inches sounds like quite a lot when you hold a ruler in front of you. But if you think of it in terms of the earth as a whole, it’s absolutely tiny; it’s minute,” he said.“It’s going to make minute changes to the length of a day. It could make very, very tiny changes to the tilt of the earth, which affects the seasons, but these effects are so small, it’d take very precise satellite navigation to pick it up.”The earth’s rotation will now shift at a different speed because the globe’s mass has been redistributed, said Michael Bostock, a University of B.C. earthquake seismology professor.He used an analogy of a figure skater pulling in his or her arms to spin faster because weight has been reorganized.“Ultimately, if you change the length of day, you can change the length of time a given point on earth receives sunlight and doesn’t receive sunlight,” he said. “But will this affect us in our lifetimes? Absolutely not.”The researchers said that while the minuscule change may be completely undetectable, it still illustrates the punch behind the Japan’s massive earthquake.Last year, NASA reported that a 8.8-magnitude earthquake that hit Chile shorted the day by 1.26 millionths of a second, according to computer-model calculations.NASA had estimated that the Chilean earthquake shifted the globe’s axis by about 10 centimetres, National Geographic reported at the time.INGV, which is Europe’s largest research institute to monitor geophysics, said the impact of Friday’s event was “much greater” than 2004’s notorious Sumatra earthquake, which clocked in at a magnitude of 9.1.Postmedia News

http://www.financialpost.com/related/topics/Japan+quake+shifted+earth+axis/4426465/story.html

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Stalno ponavljaju kako su sve te promene male i beznacajne, kako "nije to nista". Za sada, iz naseg ugla, stvarno i nije. Ali, ponekad verujem da ce se u jednom momentu desiti "mala promena" koja ce funkcionosati kao kap u punoj casi, te ce njen efekat biti veci "nego sto bi trebalo"....

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