SAN JOSE, Calif. -- Players assumed it was nothing more than exuberant fans shaking the arena. High above the ice, though, a hockey executive knew something more unusual was happening.

"I looked around, I said something wrong is going on here. Everything was shaking," said Michel Goulet, vice president of player personnel for the Colorado Avalanche. "You start thinking, 'Should I run or what?' "

Goulet was in the upper level at the Compaq Center when a moderate earthquake shook the arena during the third period of a playoff game between the Avalanche and the San Jose Sharks.

The 5.2-magnitude quake rattled the upper level for about 10 seconds and violently shook lights in an adjacent catwalk. The quake also was felt 47 miles north in San Francisco, where the Giants played the Atlanta Braves.

Play did not stop at either game, and no injuries or significant damage was reported in the San Francisco Bay area. The quake was centered near Gilroy, about 30 miles south of San Jose.

"I didn't feel anything. This building is pretty loud, so it's shaking anyway," said Colorado's Milan Hejduk, who assisted on the winning goal as the Avalanche won 2-1 in overtime to force Game 7 in their conference semifinal series against the Sharks.

In San Francisco, the temblor rumbled through Pacific Bell Park as the Braves' Chipper Jones batted in the ninth. Glass panes in the front of the press box rattled, but there was little reaction from players or fans.

"Really? No kidding?" Giants infielder Damon Minor said when he heard the news. "I missed my chance. That would have been my first one, too."

Moments after the quake, the Braves scored twice to tie it at 6 and force extra innings. The Giants won 7-6 in 11 innings.

After the bottom of the ninth, the stadium sound system played Jerry Lee Lewis' song "Whole Lotta Shakin' Goin' On."

"I was sitting upstairs and it was a good jolt," fan Jenny Hsin said. "At first I thought it was the guy behind me kicking my chair, then I looked and saw the whole row shaking with me."

Pac Bell Park's predecessor, Candlestick Park, was rocked by a 7.0 magnitude earthquake on Oct. 17, 1989, about a half-hour before the scheduled start of Game 3 of the World Series between the Giants and Oakland Athletics.

The 1989 quake, which killed 63 people and caused an estimated $6 billion in damage, left cracks in the Candlestick concrete and forced a 10-day delay in the World Series. The Giants moved to Pac Bell in 2000.

The hockey game in San Jose was tied 1-1 with nine minutes left in the third period when the quake struck.

Though photographers at ice level felt the quake, players on both teams said they didn't even realize what had happened until they came off the ice at the end of the third period.

"I heard about it, but I didn't feel it," said Colorado's Peter Forsberg, who scored the winning goal. "The puck is bouncing anyway."