Over 150 killed in Seoul Halloween crowd surge | CNN

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If you’re in a crowd and people are close enough to bump into you, it’s probably too crowded.

He is Visiting Professor of Crowd Science at Suffolk University and Head G. According to Keith Still. GKStill InternationalA consultancy that trains event organizers on how to detect risk.

Such events, such as Crowds flock to a packed Halloween festival in Seoul, the capital of South Korea And that Tragedy There have been multiple deaths and injuries at Houston’s Astroworld festival in November 2021.

Still, who has been studying crowd behavior and safety dynamics for more than 30 years, said organizers can prevent crowd crush incidents by monitoring crowd density in real-time and regulating the flow of people through a venue.

Crowd density can be measured by the number of people per square meter, approximately one square yard. Younger, younger people occupy less space than older and older people, but as a rule of thumb things get uncomfortable once you get to five people per square metre, that said – and anything overcrowded can be dangerous.

“When a body touches it, it can give rise to waves of high energy and density and collapse of the crowd,” said Still.

A sign that the crowd has become too dense is still called the “wheat effect zone,” where people are swaying uncontrollably. He said that an example of this can be seen online Video At a 2005 Oasis concert in Manchester, England, before a huge wave from the crowd towards the stage.

The key to preventing disaster, however, is for organizers to watch the density and, if it becomes too high, slow or stop the flow of people entering the area, stop it. He said that once the situation becomes too dense, it is very difficult to reduce the congestion.

If a place gets too crowded, though, the performers should stop and ask everyone to take a step back. Over the years, many artists, including A$AP Rocky and Linkin Park, That’s what it’s done.

If you’re in a crowd, you can still help yourself stay safe by paying attention to crowded areas and getting out of the crowd if you don’t have enough personal space, he said.

You can learn more by viewing the interactive graphic here.

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