There were no reports of any serious problems following Thursday's solar storm.

The storm shook the Earth's magnetic field early Friday morning, but there were no reports of any problems with electrical systems.

Experts had warned it could disrupt power grids, satellites, and telecommunication systems, but that didn't happen.

"We really haven't had any reports from power system operators yet," Rob Steenburgh, a space weather forecaster at the National Oceanic and Atmospheric Administration, said early Friday. "But sometimes they don't come in until after the storm."

The solar flares did reach what forecasters call a strong level.

"It's not a terribly strong event; it's a very interesting event," Steenburg noted.

Scientists say such storms don't pose a threat to people, just technology.

The worst problem seems to have been a two-hour blackout of high frequency radio communications, mainly affecting amateur radio operators from Africa to Australia.