A powerful earthquake struck off southwestern Taiwan yesterday, triggering a tsunami warning on the second anniversary of the waves that killed more than 200,000 in southern Asia.

Two hours later, seismologists lifted the warning, saying the threat of destructive waves had passed.

Taiwan media reported one person was killed and three injured in the southern city of Pingtung when their four-storey home collapsed. Four other members of the family were trapped in the rubble but firefighters eventually freed them, the reports said.

Many streets in the city were cracked and a major bridge was damaged, the reports said.

The US Geological Survey said the quake, which hit at 8:26 PM, registered a magnitude of 7.1, while Taiwan's central weather bureau measured it at 6.7. It was followed eight minutes later by an aftershock registering 7.0, the USGS said.

Japan's Meteorological Bureau said a 1-meter-high tsunami might be headed towards the eastern coast of the Philippines, but later lifted the warning.

"The expected waves did not materialize... the danger has passed," said Hiroshi Koide of the agency's earthquake section. "We predicted a tsunami based on the depth and magnitude of the earthquake. But ultimately, it appears no large tsunami was triggered."

Philippine police said coastal areas had been alerted.

The warning underscored the higher level of caution about tsunami waves in the region since a massive earthquake off Indonesia exactly two years earlier triggered a powerful tsunami in the Indian Ocean that killed 230,000 people in a dozen countries.

Yesterday's quake was felt throughout Taiwan Province. It swayed buildings and knocked objects off the shelves in the capital, Taipei, in the northern part of the island.

Phone lines were cut in the southern cities of Kaohsiung and Pingtung, possibly hindering reports of damage by residents, the CTI Cable News reported. Several high-rise hotels swayed violently in Kaohsiung, it said.

Liao Ching-ling, a manager at Kaohsiung's Ambassador Hotel, said the quake was the strongest she had ever felt. "The building swayed so badly that many guests panicked and ran out of their rooms and into the streets," she said.

The tremor was centered at sea about 23 kilometers southwest of Hengchun on the southern tip of Taiwan, the bureau said. Hengchun is about 450 kilometers south of Taipei.

Quakes frequently shake the island of Taiwan, which is part of the Pacific's "Ring of Fire," an arc of volcanoes and fault lines encircling the Pacific Basin. Most are minor and cause little or no damage.

However, a 7.6-magnitude earthquake in central Taiwan in September 1999 killed more than 2,300 people.

(China Daily December 27, 2006)