Subscribe free to our newsletters via your
. 24/7 Space News .


Subscribe free to our newsletters via your




















Earth Is Still Ringing From Quake

Two chart records from the Canberra Superconducting Gravity Meter after the M9 earthquake off Northern Sumatra, 26 December 2004. The red trace shows the tide channel dominated by the twice daily earth tides. The green trace shows the earthquake signal amplified after most of the tidal component has been removed. The top chart shows the day of the quake, while the lower chart was photographed on the night of Thursday 6 January 2005.
Canberra, Australia (SPX) Jan 11, 2005
Almost two weeks after the earthquake and ensuing tsunami that devastated huge areas of Asia, the Earth is still ringing like a bell, according to ANU scientists.

Dr Herb McQueen, from the Research School of Earth Sciences, operates a gravity meter at Mt Stromlo Observatory and is still recording vibrations generated by the Boxing Day earthquake.

"The main signal we now see is a steady oscillation of a few parts in 10 billion of normal gravity, which corresponds to about a millimetre of vertical motion of the Earth," Dr McQueen said.

"The early signals were much stronger. The Earth is regularly deformed by the daily passage of the Sun and Moon, raising a tide in the Earth of about 20 centimetres, and the vibrations we saw on Boxing Day shortly after the earthquake off the Indonesian coast were of a similar magnitude on our instruments."

"This is a relatively rare seismic event, which could still be making the Earth reverberate for another couple of weeks."

The Superconducting Gravimeter is Australia's most sensitive gravity measuring instrument and is located at Mt Stromlo Observatory.

It relies on the exotic superconducting properties of metals at extremely low temperatures to detect faint changes in gravity caused by tides and major earthquakes. These signals are used to map the structure of the interior of the Earth.

Related Links
SpaceDaily
Search SpaceDaily
Subscribe To SpaceDaily Express

More Than 2,500 Aftershocks In Wake Of Asia Tsunamis
Vienna, Austria (AFP) Jan 06, 2005
More than 2,500 aftershocks have been recorded in the wake of the 8.9 magnitude earthquake which triggered devastating tidal waves in south Asia 11 days ago, the body set up to monitor nuclear tests said Thursday.


Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once


credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly


paypal only






Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News








The content herein, unless otherwise known to be public domain, are Copyright 1995-2016 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.