The shock wave extending in a solar crown with a speed of 500-1 500 km/s, known also as Morton’s wave, gave the chance to specify significantly our ideas of solar magnetic field. When on the Sun there are coronals emissions of weight, on a place of their emergence swell the huge shock waves traveling round a star at high speeds. Where the magnetic field of a star is stronger, such waves representing plasma move quicker as lines of a field accelerate it. This unique line allowed the team headed by David Long from University college of London, to measure solar magnetic field more carefully, than ever. Distribution of a shock wave of Morton on the Sun is valid something probably for a solar tsunami: its speed depends on areas through which it passes. (Illustration NASA/SDO/AIA)
By the words of David Long they showed that the solar magnetic field is approximately ten times weaker than a magnetic.
The loaded particles, which have been thrown out by the Sun during four powerful solar flares in previous days, reached to the Earth. The American GOES satellites fix growth of concentration of protons in near-earth space. The weak proton solar flare testify the forecast of the center of space weather of National administration of oceanic and atmospheric researches of the USA (NOAA) These are the remains of streams, which were injected by earlier active area 1748 at east edge of the Sun. The main streams passed by. The astronomers don’t expect any dangerous phenomena. Since Monday on the Sun there were four powerful x-ray flashes of the highest class X, which weren’t observed since October, 2012. Each such solar flare was accompanied by emissions of solar plasma and the loaded particles of high energy. Their source is group of 1748 spots, which was at east edge of the Sun therefore emissions took place and passes by the Earth, and won’t cause magnetic storms.
People of Earth were lucky that the most powerful solar flare, which took place on May 12, was on the other part of the Sun. On May 12 on the Sun was observed one of the most powerful solar storm of 2013. It was recorded by sensors of orbital Observatory Solar Loudspeakers (SDO). The purpose of this program is development of the scientific knowledge necessary for the effective solution of aspects of Solar and Terrestrial communications, which directly influence life and society. Solar storm was referred to the class X1.7. The class X is the most intensive level of solar flashes. The index specifies value of intensity of flash and can be from 1,0 to 9,9. Such powerful solar storms can pose serious threat for ISS crew, and also for the complex of a space station and other space satellites. Worst of all that such flashes can’t almost be predicted in advance.
Arrival of May is noted by fascinating solar eruption on the Wednesday, released the enormous wave of most powerful flash captured on the camera of the spacecraft of NASA. Sun eruption happened for the 2,5-hour period on Wednesday (on May 1) and was shown in “a huge running wave” on the Sun. Scientists call solar eruptions the emission of coronal weight – one of types of a storm, which can “shoot” billion tons of solar substance with a speed more than one million miles at an hour. When emissions are directed directly towards Earth, the most powerful flashes can constitute danger to satellites and astronauts in an orbit, and also to interfere with establishment of communication and navigation of networks. They even can damage land power infrastructures. But in day on the first of May eruption happened on the other side of the Sun and wasn’t directed on Earth. It prepared the dazzling bright wave of the plasma, which has increased from a surface of the Sun, and then directed in an outer space. Though flash is directed not towards Earth, some scientists predict revival of geomagnetic activity. Now the Sun is in an active phase of the 11-year cycle and, as expected, will reach the peak of activity this year. The observatory of solar dynamics of NASA is one of several spaceships, which bears continuous watch at the closest star of Earth, and traces weather and storm on the Sun.
Strong flash on the Sun, occurred on Thursday, can cause a magnetic storm on Earth – flashes of such class wasn’t observed since November of last year. Flash was accompanied by emission of solar substance, and satellites recorded increase of a stream of protons to the level dangerous to space equipment about what experts already received the prevention. Flash will cause on Earth a strong magnetic storm. Meteodependent people, will feel emission consequences already today, and the main blow on a magnetosphere of our planet is expected in 1\2 days. Solar flashes, depending on the power of x-ray radiation, share on five classes: A, B, C, M and X. The minimum class A0.0 corresponds to radiation power in Earth orbit in 10 nanowatts on square meter. Upon transition to the following letter capacity increases ten times. Present flash of the class M6.5 was recorded in the morning of April 11 practically in the center of a solar disk.
The NASA spacecraft, which constantly watches the Sun, at this time made an amazing image. In the image, the solar prominences rises and the magnetic field holds them over the surface.
People could observe the solar prominences for a long time, the first mention was in 1185, and it is connected with a total solar eclipse. Studying the solar prominences began in 1842.
The solar storm began on March 16 and was recorded by Observatory of solar dynamics (Solar Dynamics Observatory, SDO). By the NASA spacecraft the scientists receive perfect pictures of the Sun in high resolution. The solar prominences started rising and breaking up to parts in graceful floating style within less than four hours. The sequence was removed in extreme ultra-violet light. It seemed that the big cloud of particles soars over a surface. At this stage the Sun is in the middle of a 11-year cycle of activity. The current cycle is designated as the 24th cycle, it is expected that the peak of activity will be observed this year.
According to NASA scientists huge sunspot that dwarfs the Earth is unleashing a series of powerful solar flares as it moves across the surface of the sun. The sunspot AR 1476 was detected by space telescopes on May 5. The huge sunspot is 60,000 miles (100,000 kilometers) across, so large that when it was first seen in views from NASA’s Solar Dynamics Observatory spacecraft, mission scientists dubbed it a “monster sunspot.”
The Uranus aurora photos were captured by the Hubble Space Telescope, marking the first time the icy blue planet’s light show has been seen by an observatory near Earth. Until now, the only views of auroras on Uranus were from the NASA Voyager probe that zipped by the planet in 1986. Hubble recorded auroras on the day side of Uranus only twice, both times in 2011, while the planet was 2.5 billion miles (4 billion kilometers) from Earth.
Sun spewed a two million mile per hour stream of charged particles toward the invisible magnetic fields surrounding Earth, known as the magnetosphere on April 5, 2010. As the particles interacted with the magnetic fields, the incoming stream of energy caused stormy conditions near Earth. Some scientists believe that it was this solar storm that interfered with commands to a communications satellite, Galaxy-15, which subsequently foundered and drifted, taking almost a year to return to its station.