Tsunami models underestimated shockwave from Tonga eruption

Disaster survivors an untapped resource

Australians who have survived natural disasters are an untapped resource for lessons in resilience and preparedness, researchers say.

Not only are they keenly aware of the danger and risks disaster events can pose, they are much more likely to feel confident they can do it again, a survey by Monash University’s Fire to Flourish initiative reveals.

The survey of more than 3500 Australians found 71 per cent of people who had lived through such an experience felt confident their communities were prepared for the next one, compared to 51 per cent of those who had never experienced one.

Sixty seven per cent of survivors said they would cope ‘well’ or ‘very well’ if a disaster was to strike in the future, compared to 48 per cent who had never experienced one.

They felt greater confidence that their household was prepared (68 per cent, compared to 43 per cent) and felt more connected to their communities, regularly sharing information and initiatives, (61 per cent to 49 per cent)…READ ON

Tsunami models underestimated shockwave from Tonga eruption

The volcanic eruption in Tonga this month unleashed an atmospheric shockwave that radiated out at close to the speed of sound, pushing large waves across the Pacific to the shores of Japan and Peru, thousands of kilometres away.

“We need to re-evaluate tsunami hazards for other volcanoes around the world”

Hermann Fritz, Georgia Tech University

Forecasting models and warning systems, designed primarily to assess earthquake-triggered waves, did not account for the boosting effects of the shockwave. It was a critical flaw in these systems, scientists said, leaving them unable to predict exactly when the waves would hit land.

“The trans-Pacific and global waves arrived earlier than forecast, which (was) terrible for distant shorelines,” said civil engineer Hermann Fritz at Georgia Tech University, who studies tsunamis.

The Hunga Tonga-Hunga Ha’apai volcano eruption triggered a tsunami that destroyed villages and resorts and knocked out communications for the South Pacific nation of about 105,000 people. Three people have been reported killed…READ ON

How to Prepare for a Natural Disaster in San Antonio

A natural disaster can strike at any time and ruin your plans instantly. If you live in the San Antonio, Texas, area, it’s important to be prepared for a hurricane or flooding. Here are some things to do before a natural disaster strikes…READ ON

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