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OMG Earthquake?


Madness

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Another one? I know that earthquakes are supposed to happen on a regular basis, but I'm pretty sure the rate of 6.0+ earthquakes (excluding aftershocks) has picked up quite a lot in just these past few months alone.

Nope. Not really. You're just hearing about more because they're occurring in areas populated by humans, and therefore are reported in the media. If there's no effect on humans, you don't hear about it.

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If by earthquake friendly you mean more susceptible to greater damage, then yes.

Living in the Fraser Valley, or anywhere near a river means that the base which the settlement is built upon, is likely composed of sediment or other loose material that would be more susceptible to liquefaction in the event of a powerful earthquake.

Except the Valley is not composted of sediment at all. Surrey is built upon a plateau, Abbotsford is too far away, Langley is inland and far away, I don't know anything about Delta but it is probably on sturdy ground. Also, the major population centers in the valley aren't right by the river, it's more inland. Also, buildings in the Valley are newer. If you're talking about Ladner then yeah you can say the ground is loose but where most of the Valley's population live it is very solid ground.

Edited by Comfortably_Numb
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If by earthquake friendly you mean more susceptible to greater damage, then yes.

Living in the Fraser Valley, or anywhere near a river means that the base which the settlement is built upon, is likely composed of sediment or other loose material that would be more susceptible to liquefaction in the event of a powerful earthquake.

No, it depends. In Richmond you're right for obvious reasons as it's all river sediment. But say in New West or South Van, there's little chance of liquefaction because the base is bedrock pretty much up to the river.

Edited by inane
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Mild earthquake hits Gatineau, Que., Sunday, felt in Ottawa

GATINEAU, Que. - A mild earthquake shook the ground in the Ottawa region Sunday afternoon.

Earthquakes Canada and the says the 4.1 magnitude quake was centred about 16 kilometres east of Buckingham, which is now part of Gatineau, Que.

The quake hit at 3:19 p.m. ET and was felt about 40 kilometres away in Ottawa.

No damage was reported and Earthquakes Canada says none is expected.

Janet Drysdale, a seismologist for Natural Resources Canada, says a 4.1 magnitude quake would produce anywhere from a little bit of rattling to more severe shaking closer to the epicentre.

She says structural damage would be unlikely.

Last month, an earthquake centred in Virginia was felt hundreds of kilometres north in eastern Canada.

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  • 3 weeks later...

The ETS (episodic tremor and slip)? Is that what you're talking about? Some earthquake blogger said it may have started sooner than normal (august). I remember posting it somewhere a few weeks ago, but i don't know how much credibility that person warrants. Still interesting.

If anyone notices when the next set of ETS begins please post it here, the next set can begin anytime now. We won't feel anything but the scientific community or a blogger like the one above might put something online.

Edited by aliboy
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  • 4 months later...

4.2 off the west coast of vancouver island today and a little more than an hour ago there was a 6.0 west of Oregon.

Activity along the coast seems to be picking up over the last week.

Is Cascadia waking up? Coincidence?

http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/usb00080ib.php

Edited by The Brahma Bull
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  • 5 months later...

Toll rises to 250 dead, 2,000 injured after two strong earthquakes in Iran:

Tehran, Iran (CNN) -- At least 250 people were killed and 2,000 others injured when two strong earthquakes jolted northwestern Iran on Saturday near the city of Tabriz, state-run news agencies said.

Iran's state-run Press TV said 250 people had died. Officials feared the casualties would rise.

The city of Ahar was home to 45 of the deaths and 500 of the injured, a local official told state-run IRNA media.

The first earthquake, a magnitude 6.4, hit at 4:53 p.m. local time 37 miles northeast of Tabriz, according to the U.S. Geological Survey (USGS), which measured 11 aftershocks. Just 11 minutes later a second quake, measuring 6.3, struck 30 miles northeast of Tabriz.

Authorities reported 17 aftershocks in the region, state-run IRNA media said. The semi-official Fars News Agency reported 35 aftershocks. Officials asked residents, as a safety precaution, to spend the night outdoors.

The quakes affected Tabriz, the capital of East Azarbaijan province, and nearby cities. It razed four villages and another 60 villages sustained heavy damage, said Fars. It said 40 people died in the city of Varzaqan and 50 were killed in Haris.

Initial reports said some buildings in Tabriz suffered structural damage and power lines were down. Telephone lines were down in Ahar, the quake's epicenter. The extent of the damage was still being assessed.

Many people were in dire need of drinking water, bread and shelter, said Fars, quoting officials.

Authorities dispatched rescue teams to the area.

Press TV broadcast images of collapsed buildings and makeshift medical stations set up in the streets. In scenes broadcast by state-run IRINN, people lying on blankets were administered intravenous fluids.

Iran sits on major fault lines -- the collision of the Arabia and Eurasia plates -- and has been prone to devastating earthquakes.

In 2003, 30,000 people died in an earthquake in Bam in southeastern Kerman province. In 1990, about 50,000 were killed in a quake that hit near the Caspian Sea.

http://www.cnn.com/2012/08/11/world/meast/iran-earthquake/index.html

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