ALERT Magnitude: 7.7 West Coast of Canada

Whats disturbing is the depths of these ,very shallow also add to that the full moon makes me think it's a good thing I'm in Kitchener this week.

It was quiet for almost an hour but about 10 minutes ago there was a 4.7M at a depth of 15km off the southwest coast of the Haida Gwaii.

Just finished reading the thread, so tell me are all of the little ones along the San Andreas faultline caused from the 7.7? Are these before shocks or are they pressure releases? WHERE are our resident experts? I am going to go find the Quakewatch thread! I did see westcoast, hopefully people are posting in the 2012 EQ thread!

reply to post by antar



I wouldn't get too worked up over what we are seeing...not just yet. It is always best to error on the side of caution and caution would dictate having an emergency stash of supplies ready just in case.

Yes, this was a very large event but with large events also come a number of aftershocks. We are seeing a normal outcome so far. These aftershocks may last for days or even weeks and may number up into the hundred range or so.

The activity that is being talked about along the San Andreas fault is normal activity for that region. While the Cascadia Subduction Zone is an extension of the San Andreas fault, there is and will be constant movement through out the entire length. This is normal. The activity reported in Idaho, Nevada, and back East is unrelated.

During events like this there are those who wish to sound the alarm and panic ensues. Panic is just what not to do. If you live in a possibly affected area the best thing to do is prepare in the event something does happen.

There is no solid science or ability to predict these sorts of events..... preparation aleves a great deal of anxiety and fear.

A 4.7 aftershock at 3:41 pm pacific time.
earthquake.usgs.gov...

edit: looks like monkeyfishfrog posted this about 2 posts up.

ok again a 4.7 after shock there not letting up
Something is going to have to give soon

reply to post by Trillium

Something is going to have to give soon

It already did. The aftershocks are likely to continue for a long time. They went on for months after the Japan earthquake.

reply to post by miner49r


K.

So no tsunamis or anything to worry about?

Originally posted by Phage
reply to post by Trillium

 

Something is going to have to give soon

It already did. The aftershocks are likely to continue for a long time. They went on for months after the Japan earthquake.

Ya if I remember they had a 7.3 then after a day or two off declining after shock

Then they got hit with the big 9.0

reply to post by antar


There was a Tsunami alert generated after the quake. It was cancelled soon there after.

Where this event occurred it is a strike-slip zone. Strike-slip zones are normally not known to generate tsunamis unlike Subduction zone events.

For now there is no need for worry. Should another similar size event happen say on the Cascadia Subduction Zone, then there may be cause for serious concern. These smaller aftershocks are no cause for tsunami worry or concern.

M 6.3, 159km SSW of Masset, Canada
Sunday, October 28, 2012 18:54:21 UTC

Originally posted by rolfharriss
M 6.3, 159km SSW of Masset, Canada
Sunday, October 28, 2012 18:54:21 UTC

That is part of the 53 after shock there had so far.
and not one was below a 4.1 on here
earthquake.usgs.gov...=/images/globes/50_-130.jpg

Originally posted by rolfharriss
M 6.3, 159km SSW of Masset, Canada
Sunday, October 28, 2012 18:54:21 UTC

That is part of the 53 after shock there had so far.
and not one was below a 4.1 on here
earthquake.usgs.gov...=/images/globes/50_-130.jpg

and as i'm wrighting this

a 3.6 in Southern Alaska and a 3.0 in Central Alaska

They seem to be coming slightly less frequently and going deeper. 4.8M at a depth of 80km around 15 minutes ago.

For those not aware of the site PNSN.org they published a bulliten on the quake and will be studying it closer in the weeks to come. The forecast is for more aftershocks to follow.

The article may found here:

M7.7 earthquake 400 km north of Vancouver Island

Originally posted by MonkeyFishFrog
They seem to be coming slightly less frequently and going deeper. 4.8M at a depth of 80km around 15 minutes ago.

*scratches head* I only see 3 at that depth, all in AK, but not at that magnitude...

1.5 31km SSE of Redoubt Volcano, Alaska 2012-10-28 17:14:13 60.234°N 152.481°W 85.2
3.0 38km NW of Willow, Alaska 2012-10-28 19:12:27 62.006°N 150.513°W 81.2
1.9 77km WSW of Anchor Point, Alaska 2012-10-28 00:55:58 59.411°N 153.005°W 80.8

This is the deepest Masset one on the USGS list:
5.1 166km S of Masset, Canada 2012-10-28 15:16:55 52.544°N 132.580°W 47.2

reply to post by Nyiah


Yeah I think initial numbers were wrong, they changed it the next time I went to check.

Originally posted by MonkeyFishFrog
reply to post by Nyiah

 

Yeah I think initial numbers were wrong, they changed it the next time I went to check.

Ok why so much difference between the two site

Queen Charlotte Islands Region 4.9 90.0 CSEM-EMSC
Queen Charlotte Islands, Canada region 4.9 12.5 USGS Feed

reply to post by Trillium


Yeah that's what I'm wondering too. They are posting contradictory depths and magnitudes so which ones are reliable?

ok Make that two 4.1 east of the islands
In the Hecate Strait
and on this one the deep is the same

This keep up the hold island going to go west into deeper water

Originally posted by darrylss
I live next door in Alberta, we never see anything EXCITING!! lol

My brother lives in Vancouver.... I hope he uses his fat wife as a flotation device... hahahaha

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WOW ATS!!!!