About Tsunami Warnings

Need Emergency Advice? Please listen to your local radio and TV announcements or call 1300 TSUNAMI (1300 878 6264) for latest warning information. For emergency assistance, call your local emergency authority on 132 500

Tsunami Warnings and Schedule

Tsunamis are recorded in Australia about once every two years, and most are small and present little threat of land inundation to our coastal communities. However the abnormal waves, tides and currents caused by even relatively small tsunami can be dangerous to swimmers and mariners.

As a result of the Australian Tsunami Warning System (ATWS) Project, jointly undertaken by the Bureau of Meteorology (Bureau), Geoscience Australia (GA) and Attorney-General's Department (AGD) and funded by the Australian Government, Australia now has a comprehensive, independent tsunami warning service to advise the media, public and emergency authorities of any tsunami threat to Australia and its offshore territories.

Tsunami Watches and Warnings for Australia

The Joint Australian Tsunami Warning Centre (JATWC), jointly operated 24 hours a day by the Bureau and GA detects, monitors, verifies and warns of any tsunami threat to the coastline of Australia and its offshore territories.

The first stage of the tsunami warning process is a 'tsunami watch' phase, where seismologists have determined that there is the potential for an identified undersea earthquake to cause a tsunami threat to Australia. If there is a threat, the Bureau will issue a National Tsunami Watch. If there is no threat, a National Tsunami No Threat Bulletin will be issued.

The National Tsunami Watch may be reissued if a tsunami remains unconfirmed by sea level observations and any potential first point of impact on Australia is more than 90 minutes away (the minimum time criteria for warning).

If sea level observations and further data confirm the tsunami threat, or if any potential first point of impact is less than 90 minutes away, the Bureau, on behalf of the JATWC, will use its severe weather communication infrastructure to issue Tsunami Warnings for the States and Territories under threat. The Bureau's Regional Forecasting Centres (RFCs) in capital cities are the main liaison point for emergency services during tsunami events.

Once separate tsunami watches or warnings are being issued for individual States and Territories, a National Tsunami Warning Summary will also be issued listing all the watches, warnings and cancellations that are in effect for the current tsunami event. The JATWC website will provide a complementary coastal threat graphic showing the regions currently under threat.

Cancellation of a Tsunami Warning

When the main threat has passed or if a tsunami didn't eventuate, the Bureau will issue a Tsunami Watch Cancellation or Tsunami Warning Cancellation. The relevant State or Territory emergency authority will inform the public when it is safe to return to the affected area. A National Tsunami Event Summary is then issued after the event.

Distribution of Tsunami Bulletins and Warnings to the Media and Public

Tsunami Bulletins, Watches, Warnings, Cancellations and Event Summaries are part of a suite of warnings for severe weather events and hazards issued by the Bureau of Meteorology.

Media organisations across Australia work with the Bureau to also inform the public in the case of a tsunami event. Tsunami Warning distribution lists are maintained at each of the Bureau's State and Territory RFCs. These distribution lists are used for both National JATWC Bulletins and Regional Warnings. In addition to the media, key agencies such as the State and Territory emergency services, local councils, port authorities, and police are included on these dissemination lists. The bulletin and warning messages are also automatically uploaded to the Bureau's website.

Tsunami Warning Messages Summary

Messages: Types and Purpose

National No Threat Bulletin Schema
National No Threat Bulletin:
To advise people that the earthquake has been assessed and that no tsunami threat exists
National or State Watch Bulletin Schema
National or State/Territory Watch:
To advise people that a tsunami threat may exist and that they should look out for further updates
Marine Warning Bulletin Schema Land Warning Bulletin Schema
State/Territory Warning:
To advise people that a tsunami threat does exist and to advise them of the level of threat and action they should take marine = blue, land = red
National Warning Summary:
To provide the public, media and emergency authorities with the status of tsunami warnings nationally
Event Summary:
To provide the public, media, emergency authorities and government with summary information that can be used in post-event analysis

Messages: Layout & ContentMessages

Product Identifier:
Identify type product/auto notifier
Media Instructions:
How urgently message/s should be broadcast. Use of Standard Emergency Warning Signal (SEWS) or not
Message Title and Issue:
Time Type, date/time and number sequence of message
Headline Message:
Key message; eg. No Threat, Potential Threat, Threat
What, where and when the threat is
Threat Information:
Level of threat , coastal areas affected, time of Arrival
Community Response Advice:
What action people should take
Next Update Time:
When the next update will be issued:
Where the Public can get Further Information:
Web and telephone details for further/latest information
Tsunami watches and warnings sample

Tsunami watches and warnings indicating the level of threat are issued for coastal zones around Australia and its offshore territories.

Categories of Threat Levels within Tsunami Warnings

In order to assist the community, tsunami threat levels in Regional Tsunami warnings are categorised into three levels with required community responses; these have been determined in consultation with emergency management authorities. These Threat Levels will be specified for the same coastal areas that are used for routine Bureau Coastal Waters Forecasts, already known to marine users.

  1. No threat An undersea earthquake has been detected, however it has not generated a tsunami, or the tsunami poses no threat to Australia and its offshore territories.
  2. Marine and immediate foreshore threat Warning of potentially dangerous rips, waves and strong ocean currents in the marine environment and the possibility of only some localised overflow onto the immediate foreshore.
  3. Land inundation threatWarning for low-lying coastal areas of major land inundation, flooding, dangerous rips, waves and strong ocean currents.

Sample - Summary

Tsunami warning for parts of Western Australia

LAND Threat

  • For low-lying coastal areas from Kalbarri to Cape Preston, including Denham, Carnarvon, Coral Bay, Exmouth and Onslow, there is a threat of MAJOR LAND INUNDATION, FLOODING, DANGEROUS RIPS, WAVES AND STRONG OCEAN CURRENTS for several hours from 7:45 PM WST on Sunday
  • People in affected areas are strongly advised by DFES to go to higher ground or at least one kilometre inland


  • For the marine environment from Cape Preston to Wallal, including Dampier and Port Hedland, there is the possibility of DANGEROUS RIPS, WAVES AND STRONG OCEAN CURRENTS, AND SOME LOCALISED OVERFLOW ONTO THE IMMEDIATE FORESHORE for several hours from 8:00 pm WST on Sunday
  • For the marine environment from Jurien Bay to Kalbarri, including Geraldton, there is the possibility of DANGEROUS RIPS, WAVES AND STRONG OCEAN CURRENTS, AND SOME LOCALISED OVERFLOW ONTO THE IMMEDIATE FORESHORE for several hours from 8:15 pm WST on Sunday
  • For all threatened areas, people are advised to get out of the water and move away from the immediate water's edge
  • For latest and further information call 1300 TSUNAMI (1300 878 6264) or visit www.bom.gov.au/tsunami/
  • Next update will be issued by 6:45pm WST on Sunday 30 September 2007

Sample - Community Response Advice


  • The local emergency authority has ordered the evacuation of low-lying parts of coastal towns and villages including [insert names]
  • People are strongly advised to go to higher ground, at least ten metres above sea level, or if possible move at least one kilometre away from all beaches and the water's edge of harbours and coastal estuaries.
  • Take only essential items that you can carry including important papers, family photographs and medical needs.
  • It may be in your own interests to walk to safety if possible to avoid traffic jams.
  • If you cannot leave the area take shelter in the upper storey of a sturdy brick or concrete multi-storey building.


  • The local emergency authority advises people in all threatened areas to get out of the water and move away from the immediate water's edge of harbours, coastal estuaries, rock platforms, and beaches.
  • Boats in harbours, estuaries and in shallow coastal water should return to shore. Secure your boat and move away from the waterfront.
  • Vessels already at sea should stay offshore in deep water until further advised.
  • Do not go to the coast to watch the tsunami, as there is the possibility of dangerous, localised land inundation of the immediate foreshore.
  • Check that your neighbours have received this advice.


  • Tsunami waves are more powerful than the same size beach waves, with the first wave not necessarily being the largest.
  • Low-level effects may be observed in neighbouring coastal areas. People are advised to take care.

For further and latest information on tsunami warnings please see

www.bom.gov.au/tsunami/ or call 1300 TSUNAMI (1300 878 6264)

Need emergency advice?
In the event of a tsunami warning for Australia for which you urgently need extra advice, please listen to your local radio and TV announcements for updates on the tsunami threat and emergency services messages or visit the Bureau's website.