The earthquake also caused extensive damage to
buildings along Sumatra's coast, according to Adam Malik of
Indonesia's National Disaster Management Office. Indonesia issued two tsunami warnings, one after the first
quake, and the second after a smaller tremor a few hours later
in the same area.
However, the Indonesian warnings and most others in the
region had been lifted by 1600 GMT on Wednesday. Several big
aftershocks were reported in the area.
An official at Indonesia's meteorological agency said gauges
measured a wave surge of 1 metre after the first quake.
Indonesian presidential spokesman Andi Mallarangeng told
Reuters one person had died after being hit by debris in
Bengkulu, a town in south Sumatra close to the quake.
"The emergency rescue system has mobilised and the president
has ordered the military to help the rescue effort," he added.
Some buildings in Padang, the capital of West Sumatra had
collapsed, witnesses reported, while Metro TV said some
buildings had caught fire.
Padang Mayor Fauzi Bahar said three people were trapped in a
collapsed three-story office building.
A Reuters witness said residents of Padang fled for higher
ground.
"The city is in complete chaos. Everyone is heading to
higher ground, I saw one house collapsed to the ground. I'm
trying to save my family," said the witness in Padang, the
provincial capital of West Sumatra, north of the tremor's
epicentre.
A huge earthquake struck the same area on Dec. 26, 2004,
causing a massive tsunami and more than 230,000 deaths in
countries across the region.
Indonesia suffers frequent quakes, lying on an active
seismic belt on part of the so-called Pacific "Ring of Fire".
Indonesia's meteorological agency said the big quake's
epicentre was 159 km (99 miles) southwest of Bengkulu, a remote
area of mountains and forests.
The Pacific Tsunami Warning Center issued an Indian Ocean
tsunami warning after the first quake struck at 6:10 p.m. (1110
GMT). Authorities from Malaysia, Sri Lanka, Bangladesh and
Australia issued independent warnings, as did India for the
Andaman and Nicobar islands and France for the island of
Reunion.
By 1600 GMT, tsunami alerts remained in place for Western
Australia, Bangladesh and Reunion.
Some residents of Singapore, Malaysia and Thailand also felt
the first quake and some buildings were evacuated.
(Additional reporting Harry Suhartono, Mita Valina Liem, Ed
Davies)