At least nine people were killed and more than 800 injured Wednesday by a powerful earthquake in Taiwan that damaged dozens of buildings and prompted tsunami warnings that extended to Japan and the Philippines before being lifted.

Officials said the quake was the strongest to shake the island in decades, and warned of more tremors in the days ahead.

“The earthquake is close to land and it’s shallow. It’s felt all over Taiwan and offshore islands,” said Wu Chien-fu, director of Taipei’s Central Weather Administration’s Seismology Center.

Strict building regulations and widespread public disaster awareness appear to have staved off a major catastrophe for the earthquake-prone island, which lies near the junction of two tectonic plates.