A tsunami watch around the Indian Ocean has been lifted hours after two powerful earthquakes hit off Indonesia’s western coast.
The U.S. Geological Survey said the first 8.6-magnitude quake was
centered about 30 km beneath the ocean floor around 430 km from Aceh
province.
That prompted the Pacific Tsunami Warning Centre in Hawaii to issue a
tsunami watch for Indonesia, India, Sri Lanka, Australia, Myanmar,
Thailand, the Maldives and other Indian Ocean islands, Malaysia,
Pakistan, Somalia, Oman, Iran, Bangladesh, Kenya, South Africa and
Singapore.
A wave measuring less than 80 cm high, rolled to Indonesia’s coast. There were no other signs of serious damage.
But just as the region was sighing relief, an 8.2-magnitude aftershock hit.
“We just issued another tsunami warning,” Prih Harjadi, from Indonesia’s geophysics agency, told TVOne in a live interview.
People along the western coast of Sumatra island and the Mentawai islands were told to stay clear of coasts.
The Pacific Tsunami Warning Centre's watch remained in effect. A tsunami
watch means there is the potential for a tsunami, not that one is
imminent.
The 8.6- and 8.2-magnitude earthquakes triggered panic on Wednesday
afternoon. Residents in coastal cities fled to high ground in cars and
on the backs of motorcycles.
The Pacific Tsunami Warning Centre in Hawaii lifted a tsunami watch for
most areas of the Indian Ocean about four hours after the first quake.
It was still in effect for Indonesia, India, the Maldives, Sri Lanka and
the island territory of Diego Garcia.
Major damage or tsunami waves locally were not reported.
The massive earthquake off Indonesia’s western coast triggered tsunami
fears across the Indian Ocean on Wednesday, sending residents in coastal
cities fleeing to high ground in cars and on the backs of motorcycles.
A strong aftershock nearly three hours later sparked a new wave of
panic. Indonesia’s government responded by issuing a fresh tsunami
warning.
Some residents were crying in Aceh, where memories of a 2004 tsunami
that killed 170,000 people in the province alone, are still raw. Others
screamed “God is great” as they poured from their homes or searched
frantically for separated family members.
The initial quake was a strike-slip, not a thrust quake, according to
experts. In a strike-slip quake, the earth moves horizontally rather
than vertically and doesn’t displace large volumes of water.
They were still analysing the aftershock.
“When I first saw this was an 8.7 near Sumatra, I was fearing the
worst,” Roger Musson, seismologist at the British geological survey who
has studied Sumatra’s fault lines, noting one of the initial reported
magnitudes for the quake. “But as soon as I discovered what type of
earthquake it was, then I felt a lot better.