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Magnetosphere in the near-Earth space environment. The solar wind also carries with it the Sun's magnetic field. This field will have either a North or South orientation. If the solar wind has energetic bursts, contracting and expanding the magnetosphere, or if the solar wind takes a southward polarization, geomagnetic storms can be expected.
The solar wind is observed to exist in two fundamental states, termed the slow solar wind and the fast solar wind, though their differences extend well beyond their speeds. In near-Earth space, the slow solar wind is observed to have a velocity of 300–500 km/s , a temperature of ~ 100 kilokelvin and a composition that is a close match to the ...
A negative Dst index means that Earth's magnetic field is weakened. [15] This is particularly the case during solar storms, with a higher negative Dst index indicating a stronger solar storm. The 2003 Halloween solar storms had a peak Dst index of −383 nT, although a second storm on 20 November 2003 reached −422 nT while not reaching G5-class.
Programming note: Tune in to CNN NewsNight: Solar Storm, hosted by Abby Phillip and Bill Weir, tonight from 10 p.m. to 12 a.m. ET. For the latest on the massive solar storm, head over to CNN’s ...
Streams of fast solar wind originating from coronal holes can interact with slow solar wind streams to produce corotating interaction regions. These regions can interact with Earth's magnetosphere to produce geomagnetic storms of minor to moderate intensity. During solar minima, CIRs are the main cause of geomagnetic storms.
The solar wind is divided into the slow solar wind and the fast solar wind. The slow solar wind has a velocity of about 400 kilometres per second (250 mi/s), a temperature of 2 × 10 5 K and a composition that is a close match to the corona. The fast solar wind has a typical velocity of 750 km/s, a temperature of 8 × 10 5 K and nearly matches ...
Why is it dangerous to view a solar eclipse through a camera, telescope, or binoculars? The lenses of cameras, telescopes, and binoculars will magnify and intensify direct sun rays during the eclipse.
On April 8, millions of people across North America will witness day turn to night as the moon blocks out the light from the sun, but there will be more to the celestial spectacle than many think.