A geomagnetic storm could hit the earth on the day of April 16th: according to the estimates provided by the Space Meteorological Forecast Center of the US Agency Noaathe storm should reach the G2 classOf moderate intensityincreasing the chances of attending the show of Boreal aurores in lower latitudes Compared to the usual. To this intensity could also make themselves necessary corrections to satellites orbitsand they are possible blackouts of radio waves to higher latitudes. The arrival storm is due toemission of two cme, or coronal mass expulsionsthat is, expulsions of matter in the form of plasma, which took place in rapid succession on 12 and 13 April.
“The Cme have two possible causes: i solar shine or the so -called ‘Erutive protuberances‘”, He tells Ansa Mauro Messrootti, professor of Space Meteorology at the University of Trieste.” These are pipes of magnetic flows who appear as bright arches Supported by the magnetic field, and have lower temperatures and higher density than the surrounding plasma. The emission of two protuberances one after the other is a characteristic phenomenon – adds Messreotti – since we can say that the first one leads the way to the second in some way “.
THE’arrival time of the two cme is still uncertainbecause spatial weather conditions, as well as those on earth, are extremely variable and it is therefore extremely difficult to make forecasts well in advance. “In this case, great auroral phenomena is not expected – says Messerotti – but you can never know, since unexpected interactions could take place between the CME and the Earth’s magnetic field”.
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