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Seismic waves came off an island near Africa and struck Canada. Their cause is a mystery



If seismic waves appear near an island away from Africa and arrive in Canada, does anyone feel that they are?

Probably, not – criticized by a phenomenon that was produced earlier this month.

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The unusual psychological phenomenon is growing near the island of Mayotte, off the Madagascar coast on November 11.

I've been tired early by Twitter user @ matarikipax, who posted the US Geological Survey data showing they've been found at a monitoring station in Kilima Mbogo, Kenya.

The same user touched that waves were also found in Zambia, Ethiopia, Spain and New Zealand.

John Cassidy, a Canadian Earthquake (NRCan) earthquake seismologist joined later, saying that the waves had been found throughout Canada, in Victoria, Haida Gwaii, Toronto, Ottawa and Halifax.

Obviously, the waves were seen across the planet.

But it seems that no-one has felt that they even have originated – and that has given them a aura of mystery, Cassidy told Global News.

No-one can explain exactly why they have happened.

READ MORE: A 6.8 magnitude earthquake hit Greece's tourist island

Typically, a tectonic earthquake produces initial waves (P waves) and secondary waves (waves s), but neither did it produce either.

He moved the ground up and down every 17 seconds as the waves flowed – "shaken very slowly," said Cassidy.

A earthquake may occur, but if that did, the event was certainly not "typical", he added.

"Based on seismic events and GPS forming data, there is likely to be volcanic connection – moving magma chambers, etc." said Cassidy.

The seismic waves originated in an area where "swarm earthquake" occurred earlier this year.

Mayotte, formed by volcanic activity, saw "hundred hundred seismic events" recorded in the area beginning in May, according to the BRGM French geological surveyor.

The first took place on May 10. Then five days later, the Comoros Island adjacent the size-5.8 earthquake, which is the largest ever recorded.

Smoke rises from lava spewing in the Mount Karthala crater of 7,746 feet (2,361 meters) on Monday, May 29, 2006, at Grand Comore, the largest of the three Comoros islands. Mount Karthala's explosion ended in April 2005.

AP Photo / Julie Morin

Further seismic events were held in the area but have fallen since July.

"This shows that the seismic energy released has weakened since the start of the crisis, although some of the earthquakes are still felt by the population," said BRGM.

The cause of the swarm is still being investigated, but researchers believe it may be a combination of tectonic and volcanic effects – although this has not yet been confirmed.

There was a region inside B.C. has experienced a earthquake nest in 2007, after it has never recorded past cuisine.

The swarm was attributed to be injected magma to the lower crust under the Anahim volcanic belt, a phenomenon that produces "high volcanic tectonic earthquakes and spasmodic injections."

READ MORE: 3 earthquakes measuring between 6.5 and 6.8 sq.m. off Vancouver Island

If volcanic activity was confirmed near Mayotte, then this would be the first to hit the area in over 4,000 years.

And this is important for West Canada, Cassidy noted – there are also many folcanoes that have been dormant for thousands of years and could be implemented again in the future.

"Understanding these signs of Mayotte will help us to understand volcanic hazards here in Canada," he said.

© 2018 Global News, section of Corus Entertainment Inc.


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