Bureau of Meteorology


The BOM Blog gives you the background and insider info on weather, climate, oceans, water and space weather—as well as the latest on the work of the Bureau.


We welcome participation in the comments section of our blog; however, we are not able to respond to all comments and questions and your comments may take a little time to appear. The blog is monitored from 9 am to 5 pm Monday–Friday.

Our community includes people of all ages and backgrounds and we want this to be a safe and respectful environment for all. To keep the discussion interesting and relevant, please:

  • respect other people and their opinions;
  • keep your comments on topic and succinct;
  • say why you disagree or agree with someone;
  • comment constructively—in a way that adds value to the discussion.

When commenting, please don't:

  • make defamatory, libellous, false or misleading comments;
  • use obscene, insulting, racist, sexist or otherwise discriminatory or offensive language;
  • post personal information about yourself or others, such as private addresses or phone numbers;
  • promote commercial interests;
  • violate the intellectual property rights of others;
  • violate any laws or regulations;
  • provoke others, distort facts or misrepresent the views of others; or
  • post multiple versions of the same view or make excessive postings on a particular issue.

We won’t publish comments that are not in line with these standards. Blocking/removal of content or banning of users is at our discretion.

There is no endorsement, implied or otherwise, by the Bureau of any material in the comments section. Users are fully responsible for the content they submit.

Commenting is available via a Facebook plugin, which can only be accessed by those with Facebook accounts.

You can contact us at bomblog@bom.gov.au.

Copyright | Disclaimer | Privacy


Contact our social media team at socialmedia@bom.gov.au

Tsunami warnings: Australia's front-line defence

Tsunami warnings: Australia's front-line defence

If memories were fading of the devastation wrought by the 2004 Indian Ocean tsunami, Japan's Tohoku earthquake on 11 March served up a shocking reminder of the deadly force of earthquake-generated tsunamis – and our own continuing vulnerability on the edge of the Pacific Ocean's 'Ring of Fire'.

Tohoku Japan tsunami animation (text description)

The system proves the lifesaving potential of a $70 million investment by the Australian Government following the 2004 tsunami, to establish a world-class warning system combining the expertise of Geoscience Australia, the Bureau of Meteorology, and their domestic and international partners.

Today, the Centre, operating between Canberra and Melbourne, is the sole authority for issuing tsunami warnings and advice for Australia and its offshore territories.

Seismologists from Geoscience Australia receive real-time data from a network of over 170 seismic stations in Australia and across the Indian and Pacific Ocean regions. If an undersea earthquake occurs with a magnitude above 6.5 Mw and at a depth of less than 100 metres, a comprehensive monitoring system is activated involving the Bureau's extensive sea-level instrumentation network and the very latest tsunami-impact computer modelling.

The two agencies use the information to determine whether a tsunami has been generated, where and when it will reach Australia's shores and the likely impact on marine and coastal areas.

Through the Bureau's media and emergency contacts, the Centre issues immediate and continuous warnings to the public, emergency services, police, and maritime authorities. Public updates are also uploaded to the Bureau's website, and an online 'threat map' is activated to show areas at risk, levels of threat, and relevant warnings.

Article URLs

Joint Australian Tsunami Warning Centre

Comment. Tell us what you think of this article.

Share. Tell others.