The first geomagnetic storm resulted after a cloud of plasma filled with charged particles was thrust into space toward Earth during a massive eruption on the sun's surface Tuesday. It's one of an increasing number of solar storms as the sun reaches the peak of its 11-year cycle. Another eruption on the sun pushed a second cloud of plasma toward the planet. That's believed to be smaller than the first.
Scientists expect it to arrive late today.
The Earth's magnetic field blocks most of storm's harmful effects, but some particles still filter through. These can create electrical disturbances that disrupt power supplies, telecommunications and signals that control various systems. The particles can damage satellites and alter their orbits. So far, no problems were reported in Canada because of the storm. But, it's caused a few minor radio transmission blackouts in the U.S. Residents in parts of Canada reap one benefit of major solar storms.