Space weather events can have
significant effects all the way from the Sun to Earth. They have been
implicated in the depletion of ozone and cloud formation, and their signatures
may even be seen in ice core records spanning more than 400 years into the
past. Solar activity at other planets, and elsewhere in the solar system, can
be important, and violent flare activity can even be observed at other stars.
Economically, these events may have severe consequences ranging from human
exposure to increased radiation to disruption of communications, navigation and
timing, and electrical power.