On Earth Satellite-based systems and communications were affected, aircraft were advised to avoid high altitudes near the
polar regions, and a one-hour-long power outage occurred in
Sweden as a result of the solar activity.
On satellites and spacecraft The
SOHO satellite failed temporarily and the
Advanced Composition Explorer (ACE) was damaged by the solar activity. Emissions from the CME were later observed by the
Mars Odyssey spacecraft orbiting
Mars,
Ulysses spacecraft near
Jupiter, and the
Cassini spacecraft en route to
Saturn. In April 2004,
Voyager 2 was also able to detect them as they reached the spacecraft. ==Analysis==