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CanadaTremor tales: A look at New Brunswick's history with earthquakes

13:05  12 january  2019
13:05  12 january  2019 Source:

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An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth, resulting from the sudden release of energy in the Earth' s lithosphere that creates seismic waves.

This earthquake has sometimes been called the deadliest earthquake in history . This was the second highest seismic activity recorded with the longest duration of tremors . The after-effects even reached Maldives and Thailand, with more than 5 tsunamis hitting the coastlines of the Indian Sea.

Tremor tales: A look at New Brunswick's history with earthquakes© CBC Archives A woman is interviewed about the 1984 earthquake near Priceville. 'The globe started shaking on the wagon wheel. And so right then I just hollered ... I said there's an earthquake.'

Thursday's earthquake near Grand Bay may have been startling, but in the grand scheme of the province's earthquake history, it wasn't exactly groundbreaking.

"New Brunswick is considered an area of moderately elevated risks in Canada compared to average," said geophysicist Karl Butler.

The quake risk isn't as high as the Ottawa valley and the Quebec City area, and not as high as the west coast, but it's higher than many other parts of the country.

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New Brunswick . Okanagan. The earthquake struck just around 11:40 p.m. PT and measured 4.3 on the Richter scale, according to Natural Resources Canada. Largest earthquakes in B.C. British Columbia has a history as Canada' s hub of seismic activity, with fully half of the country' s top 10

The following is a list of earthquake lists, and of top earthquakes by magnitude and fatalities.

One of the biggest quakes ever recorded happened in 1982 between Newcastle, now Miramichi, and Plaster Rock.

That earthquake registered 5.7 on the Richter scale, causing cracks in some basements and roads.  It was much stronger than Thursday's quake, which had a magnitude of 3.8.

Tremor tales: A look at New Brunswick's history with earthquakes© CBC Archives CBC Archives

The areas of St. Stephen, Miramichi, and Moncton have experienced the biggest quakes, but the province has been shaken by hundreds over the years. Most aren't felt, but will still be registered by a seismograph.

Butler said it's very important to track them all.

"Really the risk levels, or seismic hazards, are based largely on what we know from the past," he said.

"Because they're infrequent, and hard to predict, we have to rely on statistics of looking at catalogues of the past to better know what areas are at risk in the future."

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earthquakes , earthquake prediction, San Andreas fault, David Nabhan, Cascadia fault, seismic, fracking, hydraulic fracking, science fiction, helium-3 AND For Science Fiction Fans From Skyhorse Publishing please click here for a look at Pilots of Borealis, an "incredibly fast-moving, thoroughly

The earthquake came less than a week after a powerful tremor centred in the upper South Island New Zealand has endured more than its fair share of earthquakes . New fault lines emerged there “If the period is longer we expect higher magnitude earthquakes looking at the history of some of

New Brunswick has had substantial quakes every 30 years or so, but Butler said it hasn't always been easy to track them.

The province didn't start using seismographs until the 1960s, meaning every prior earthquake had to be assessed using newspaper reports dating back to the 1700s.

Geologists would painstakingly comb through the old newspaper accounts trying to figure out how far away people reported feeling the quakes. This helped determine the approximate magnitude.

Tremor tales: A look at New Brunswick's history with earthquakes© CBC CBC

So although the 1982 quake was the largest one recorded by a seismograph, another in St. Stephen in 1904 takes the title of largest-ever known, with a magnitude 5.9.

"It seemed that the shock was felt in St. Stephen more than anywhere else in the province. Several chimney pots were thrown to the ground.  Some bricks were loosened from the walls of the Methodist Church, some panes were broken in the Chipman Memorial Hospital," reads one historical account.

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Why are there no earthquakes in Florida? Take a look at the map for yourself… Florida’ s Tectonic Setting and Geology. This inactivity in a dynamic world begs a question: Is Smaller tremors regularly occur in otherwise stable areas as a result of movement along existing faults — a mechanism which

Earthquakes are usually caused by shifting of tectonic plates present under the surface of the Earth. When these tectonic plates strike with each other, or just get scratched, they cause the Earth’ s surface to vibrate, thus giving rise to earthquake . The point of origin of an earthquake is known as its

Tremor tales: A look at New Brunswick's history with earthquakes© CBC Archives CBC Archives

More recently, Doaktown was rattled by a quake in 2009, downtown Fredericton in 2011, and a series of tremors struck McAdam in 2012.

Tremor tales: A look at New Brunswick's history with earthquakes© The Acadian Recorder Archives The Acadian Recorder Archives

News archives also show there was an earthquake in Priceville in 1984 that gave residents quite a scare.

So Thursday's quake is not unusual, Butler said.

However, the residents of Grand Bay were lucky the magnitude was only 3.8. Butler said quakes start to cause damage when they reach 4 on the Richter scale.

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