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The Tofino earthquake confirms that the soon to come warning system can save lives
A network of seismic sensors gave researchers 35 seconds of warning before a 4.8-magnitude earthquake struck off Vancouver Island last week, and it passed another important test before it could be integrated into a countywide alert system.
Ocean Networks Canada, a monitoring initiative of the University of Victoria, says its network of deep-sea and terrestrial sensors used to develop the system would have given public safety officials and, ultimately, even residents, a heads-up before any shaking begins. Friday night.
While the earthquake off Tofino did not cause damage, the team says that when a large earthquake inevitably strikes, every second of advance warning to emergency officials can go a long way toward preventing injury or death.
“That amount of time could allow them to slow down so that the train doesn’t derail when the shake hits. Elevators can get to the ground floor to bring them into a safe locked position. Firehouse doors can open automatically. Operations in hospitals can come to a halt,” Kate Moran said. “Aircraft can be diverted from course,” said Ocean Networks Canada President and CEO.
“There are a lot of things that could be done that would really save infrastructure, but that in turn would also save lives.”
The specialized sensors are located in the region near the Cascadia subduction zone where the Juan de Fuca and North American tectonic plates meet.
They are conditioned to detect not only the wave of energy that causes the earth to shake, but also the previous wave that was generated before the shaking was felt. In the case of Friday, it was 35 seconds, but in some cases it could be up to 90 seconds depending on the location.
“So our sensor systems in this network detect the initial wave,” Moran said. “We can use this information to calculate the location and magnitude of the earthquake, and this then allows us to calculate how long before the ground shaking reaches your location.”
The calculation is done quickly using a complex algorithm that public safety departments will one day automatically receive in the event of an earthquake. This means that departments like BC Emergency Management can prepare an appropriate response depending on the location and severity of the earthquake before it hits.
Not only will operators of critical infrastructure be linked to this monitoring system’s data, British Columbians will also be able to get advance warning through a program called ShakeAlert.
“The public alert that will come through a program that the federal government has agreed to implement here in Canada is called ShakeAlert,” Moran said. It was developed in the United States as a public alert system. So you will hear more about that as this moves forward from the perspective of the federal government in partnership with the province.”
The federal government has said it hopes to post alerts to more than 10 million Canadians in the country’s most earthquake-prone areas by 2024, but British Columbians may see some form of alert sooner since the monitoring network is based in the United States. Moran said.
Although a tip of a few seconds might not seem like enough time to do anything—although Moran reminded the British Columbians to get their seismic kit ready—the official advice to anyone caught in an earthquake remains the same: . “
“Every second is precious, this is the best way to express it,” said Moran. “We are working to deliver as many seconds as possible before the deadline.”
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