21 Dec 2016

Earthquake Off Indonesia, Felt In Northern Australia: No Tsumani Threat


A magnitude 6.7 earthquake near Indonesia has shaken people in the Northern Territory, but authorities say there is no tsunami threat to Australia.

Geoscience Australia confirmed tremors from the quake near the Banda Sea off Indonesia were felt in Darwin on Wednesday morning.

The quake occurred around 9am local Indonesian time with an epicentre 180km deep, and there were no immediate reports of damage. Indonesia’s disaster agency said residents in the south-west of the Moluccas island chain also felt the quake.

The epicentre was 630km north-west of Darwin, but Bureau of Meteorology senior forecaster Chris Kent, who is based in the city, said the quake lasted several minutes.

Local Andy Chandler was on a ladder in her kitchen in Coconut Grove doing some pre-Christmas cleaning when she felt the tremor. “Pots and pans started rattling and the whole house and everything started shaking,” she told ABC local radio.

Fellow Darwinian Bev Luke said she watched the Christmas decorations “do a dance” in her home, while Celeste Green said she felt the earth move under her feet. “My whole building just shook for about five seconds, so much that my pictures fell off the wall,” Green said.

Australia’s Northern Territory News said the quake was widely felt across Darwin and surrounding areas.

Angela Pattison said Howard Springs was “rocking and rolling” with the tremor. “The fish tank was a-sloshing and the cabinets were a-rattling and my chair was doing the four-legged jive!” she said.

Other Territorians felt it as far away as the Tiwi Islands, Yirrkala in Eastern Arnhem Land and in Katherine.

Dan Jaksa, senior seismologist at Geoscience Australia, said earthquakes happen regularly in the Banda Sea, which are often felt in the Top End. “In the past 20 years there’s been more than 140 over magnitude six in the region,” he said.

Jaksa said the shaking from the seismic waves travels more readily on the Australian tectonic plate than the Indonesian one.

“Most of the motion is on our plate. It was probably felt less in the immediate region where the epicentre is than it was in Darwin,” he said.

The Joint Australian Tsunami Warning Centre has ruled out a tsunami threat.

Jaksa said earthquakes at this depth don’t produce damaging surface waves because the fault is less likely to rupture the seafloor.

(The Guardian)

Read 105 times
(0 votes)