A Guide to SOLAR FLARES and CMEs - FEMALE VOICE OF SCIENCE Narrator -SUBTITLED


Uploaded by revoeciov on 23.06.2012

Transcript:
 Solar flares may seem far removed from events,
but they can damage satellites and even ground-based technologies and power systems.
Every 11 years the sun reaches its maximum activity. They are becoming increasingly common.
And increasing the chances that one will significantly affect the earth. So what are these solar
flares? Solar flare is essentially an explosion on
the sun's surface ranging from minutes to hours in length.
Large eruptions can release enough energy to all United States for a million years.
The flares occur when strong magnetic fields in and around the sun re-connect. They are
generally associated with active regions often perceived as places where magnetic fields
are strongest. Flares are classified according to their strength.
The smaller ones are class B and C, M, and X, the largest. Similar to the Richter scale
for earthquakes, each letter represents a 10-fold increase energy production. Thus,
an X and M is ten times and a hundred times a C. Within each class there is a letter of
finer scale 1 to 9. C-class flares are too small to significantly
affect the earth. M-class flares can cause brief radio blackouts at the poles and minor
radiation storms could endanger astronauts. These are the X-class flares that are real
giants. Although X is the last letter, there are more than 10 rockets X the power of X-1.
So X-class flares can go higher than 9. The most powerful flare ever recorded was in 2003
during the last solar maximum. It was so powerful that it overloaded instruments measuring sensor.
The cutting and the X-17 rocket was later estimated to be an X45. A powerful X-class
flare like that can create long lasting radiation storms that can damage satellites and even
to offer passengers flying near airling radiation doses of small clusters.
X rockets also have the potential to create problems of global transmission and worldwide
blackouts. The severity of a rash of class X pointed
the earth That's why NOAA and NSA constantly monitor the sun. Fleet NSAS heliophysics spacecraft
can now see the sun on all sides and in different wavelengths.
This unprecedented media coverage allows scientists to predict and detect space weather events,
like flares and CMEs with ever greater precision. With prior warning, governments and businesses
can take steps to protect their technology infrastructure so that the worst scenarios
will never happen.