Another powerful quake hits Sumatra

A major 7.0-magnitude earthquake struck Indonesia's Sumatra island today, southeast of the site of an earlier powerful quake that left more than 1,000 feared dead, geologists said.

The quake hit on land at 8:52 am, 225 kilometres southeast of the quake-hit city of Padang. The United States Geological Survey put the quake at 6.8-magnitude.

"There are several heavily populated towns (in the area) there but no immediate reports of casualties," Indonesian geophysics and meteorology agency technical head Suharjono told AFP.

"The latest quake could have been triggered by the West Sumatra quake yesterday. The pressure from the two plates colliding might have caused the rear of either plates to break and this likely triggered the latest quake," Suharjono added.

The Japan Meteorological Agency said there was a "very small possibility" of a destructive local tsunami in the Indian Ocean.

A major 7.6-magnitude quake struck off Padang on Wednesday

Meanwhile rescue workers raced against time today to assist victims of the huge first earthquake where upwards of 1,000 people are feared dead and many more trapped in rubble.

Wednesday afternoon's 7.6-magnitude earthquake caused buildings to crumble and fires to rage in Padang city, home to nearly a million people on the coast of Sumatra island, which was left largely without power and communications.

"The rescue personnel in the location estimated that so far at least 200 people have died," Disaster Management Agency spokesman Priyadi Kardono said in Jakarta.

But that number was likely to soar, officials said, as the first outside rescue teams from the Indonesian army and health ministry reached the city and surrounding towns to reinforce overwhelmed police on the ground.

Airport, hospital collapsed

Their task was to hunt for those still alive, in the twisted wreckage of collapsed hospitals, schools and homes.

"We need heavy machinery to lift the rubble... we expect that to arrive at the location soon," Kardono said.

At Padang's airport, parts of the roof had collapsed, leaving metal beams hanging down, an AFP correspondent said.

Health ministry crisis centre head Rustam Pakaya told AFP that a major city hospital was among the many buildings that had buckled.

"Houses and buildings have collapsed, causing thousands of people to be trapped inside in the rubble," Pakaya said.

He said he expected the death toll to soar over 1,000, given the scale of destruction and the large numbers of people feared buried in the rubble.

Yanto, a hotel receptionist in Padang, said electricity remained cut off on Thursday morning more than 15 hours after the quake.

"Our hotel has been heavily damaged. There are many cracks and rubble from fallen concrete," he said. "Thank God all our guests survived."

Aid and relief sought

President Susilo Bambang Yudhoyono, briefing reporters in Tokyo as he returned from the G20 summit in the United States, urged officials to "flood" the city with aid and medical relief.

Three military transport planes were preparing to deliver aid including tents, blankets and medicine, Disaster Management Agency spokesman Priyadi Kardono said.

"The effects of the earthquake could be as big as the Yogyakarta quake," he said, referring to a 2006 quake that killed 6,000.

British-based charity Oxfam said it had already earmarked 200,000 pounds (320,000 dollars) for relief efforts, including the distribution of emergency shelters, hygiene kits and clothing.

"We had aid ready because this area of Indonesia is susceptible to this type of tragedy," said Jane Cocking, the organisation's humanitarian director.

Panicked residents rushed from their homes and went fleeing through the streets after the quake struck off Sumatra's west coast at 5:16 pm, 47 kilometres northwest of Padang.

It was felt in the Indonesian capital Jakarta, 940 kilometres away, and sent frightened office workers streaming out of buildings in nearby Singapore and the Malaysian capital Kuala Lumpur.

Dozens of aftershocks followed, including the major one today which the US Geological Survey measured at 6.8 and said hit on land 225 kilometres (140 miles) southeast of Padang.

The Indonesian earthquakes followed a massive quake measuring 8.0 in magnitude that spawned a deadly tsunami in the Samoan islands of the South Pacific.

Like Indonesia, the islands sit on the volatile "Ring of Fire," a massive zone of volcanic instability that encircles the Pacific.

- AFP