It is disappointing to see sirens still being promoted despite the demonstrated problems. And I think Kogami was present at the HazInfo dissemination event we held in Jakarta.
Patra Rina Dewi, director of the Tsunami Alert Community (Kogami), a nongovernmental organisation working on disaster mitigation training for communities, said the knowledge people most need is whether an earthquake has the potential to become a tsunami.
The current standard for this is an earthquake that occurs less than ten kilometres below the seafloor and is recorded as more than seven on the Richter scale.
“But this kind of information should be translated into easy information for the people,” said Patra.
She added that the most effective warning method is sirens, but these are often of limited number and can be heard only at a distance of about one kilometre.
In most countries (few exceptions being North Korea, Burma/Myanmar, Papua New Guinea), mobile penetration is broad enough that cell broadcasting would be superior. Not that you cannot have a few strategically placed towers so the objectives of security theater and commissions from construction can also be satisfied.