Earthquake detectors gave UBC researcher heads-up on quake

When Tuesday night's 4.8magnitude earthquake hit Vancouver Island and the Lower Mainland, Kent Johansen was working late in his home laboratory in Burnaby.

He heard an alarm go off. An earthquake was coming.

And for a man working with UBC's Earthquake Engineering Research Facility on earthquake detection, that was good news it meant the system worked.

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"I'm thinking, this is serious: this is a real one," he told On The Coast guest host Laura Lynch about the moment he saw the alarm.

"I went upstairs and got my seven-year-old daughter Freya, we got underneath the table in the living room, and I was devastated. I wanted to see all the data roll by!"

Thirteen seconds after Johansen got the warning,the quake hit.

Warnings can reduce casualties by half

Alarms powered by the UBC earthquake detectors have been placed in 61 schools on Vancouver Island and the Lower Mainland, and more schools are planned to receive them.

If classes had been in session, students would have heard a loud siren before the quake hit. Schools in Victoria would have gotten about six seconds of warning before the quake hit, and Lower Mainland schools would have received 13 to16 seconds.

While that might not seem like a lot of time, Johansen saidthat even a warning of three to four seconds can halve the number of casualties from an earthquake.

Johansen saidhe is happy with the way the system works, but hopes this quake gets British Columbians thinking about preparing for "the big one" in a more serious way.

"We don't have a lot of the good 'training' earthquakes here in Vancouver, and that's probably why we take the big onethat's lurking with such nonchalant distance," he said.

You can see the data the earthquake produced play out as the earthquake happened in the video below.

To hear the full story, click the audio labelled:13 seconds before last night's quake, quake detectors alerted researcher