A space weather forecast

A space weather forecast

CME WILL NOT HIT EARTH, STORMS POSSIBLE ANYWAY: A coronal mass ejection (CME) propelled into space yesterday by an erupting solar filament will not hit Earth. However, a solar wind stream will. The stream, which is flowing from a coronal hole in the sun's northern hemisphere, is expected to arrive on August 30-31, possibly sparking polar geomagnetic storms. High-latitude sky watchers should be alert for auroras.

MAJOR FIREBALL EVENT, UPGRADED: NASA's Meteoroid Environment Office has upgraded its estimates of a major fireball that exploded over the southeastern USA on August 28th. Lead researcher Bill Cooke says " the fireball reached a peak magnitude of -13, brighter than a Full Moon, and cast shadows on the ground. This indicates that the meteoroid had a mass of over 50 kg (110 lbs) and was about 40 cm (16 inches) in diameter. It hit the top of Earth's atmosphere traveling 23.7 km/s (53,000 mph)." See the picture, then read more about the fireball below:

 

"As far as I know, this is the brightest event our network has observed in 5 years of operation," he continues. "There are reports of sonic booms reaching the ground, and data from 4 doppler radars indicate that some meteorites may have fallen along the fireball's ground track." (Note: The city in the ground track map is Cleveland, Tennessee, not Cleveland, Ohio.)

Using data from multiple cameras, Cooke has calculated a preliminary orbit for the meteoroid. The shape and dimensions of the orbit are similar those of a Jupiter-family comet. If meteorites are recovered from the Tennessee countryside, their chemical composition will tell researchers more about the origin of the fireball.

The entire link and very quick movie can be found at:  http://spaceweather.com/