Magnitude 5.9 - OFF THE COAST OF OREGON

Brookings North Bend Coos Bay Florence

pack up!! and head for HIGH GROUND !!

weird!!! i live on the west coast of vancouver island and
decided today to take an extra few days off and head
home to kelowna tomorrow morning to see my mom for no reason,
then i come on here and see this?
if it's a foreshock i hope the big one hits in the next 3 days

The history channel, on its series megaquakes, showed a gelogist going through sediment around the subduction zone, and he said there is evidence of a 10+ in the area, before recorded history, and there is indeed a cycle of mega quakes in the area.

You're welcome! Good job finding the stats on the aftershocks, perhaps they (Wiki) was referring to ~24 in the first 24 hours with the remaining 17 you found happening on the second day.

I'm trying to find info on another 5-6+ quake that happened off the coast in the last year or so (maybe 2).

Since the article I linked indicated this 6 was the biggest off the Oregon coast the one I'm thinking of must have been further north, off Washington State, Vancouver Island or that vicinity.

If someone beats me to finding it, please post when it was and the aftershock information.





Also, I have a feeling Mexico might be seeing some activity soon. I posted about it here:

Thread: F.O.G. (Page 311)

I found the thread for the Volcano off of Oregon. Its not a Volcano at all, its a caldera, and we all know what happens when a caldera blows. I haven't gone through the thread, but there was some footage, and the links may still work, of the Juan de Fuca under water, as well as the vents from the Axial Caldera.


Thread: Cam viewing recent eruption of Axial Caldera on the Juan de Fuca

No aftershocks is worrying to say the least. Almost as if something slipped and is now caught and building pressure. The question is 'how much'?

Magnitude 3.7 - SAN FRANCISCO BAY AREA, CALIFORNIA
[link to earthquake.usgs.gov]

Go to the link above, then click video gallery. Dive 1473 is the one that show the vents in the caldera.
Here is one clip. Sorry, I don't know how to embed this.

[link to interactiveoceans.washington.edu]

Just felt an earthquake in Vallejo, CA

check my last post

I believe this earthquake is probably related to the volcano. It's roughly in the same area.

dive 1467 and 1468 are very interesting as well. One of these clips actually shows where the plates meets, and very large gaps between them. This is what is happening down there right now, even though this was shot in August of last year, a few months after the first eruption in a thousand years.

Thats what I'm thinking. Its in exactly the same area.

These are some really cool videos!

As a resident of and having family in both the San Francisco and Los Angeles areas, I watch local (California/West Coast) quake activity pretty closely.

For the record, it is unusual to have a quake over 3 in this area (Vallejo/Solano County) - we only get a 3+ in this region (Contra Costa/Solano/Sacramento Counties) very, very occasionally:

Do you agree, Vallejo?

[link to earthquake.usgs.gov]

It isn't volcanic! it's a subduction zone, if it was volcanic the 6.0 would have been an explosion from the volcano,small harmonic tremors would show volcanic activity there haven't been anymore quakes there since nevermin harmonic quakes.

Interesting. There definitely seems to be an uptick in magnitude of eqs in that region in the past week or so. All that moving and that fault is finally going to slip. Anyway, lets hope not for a long time

tiny tiny tiny EQ!

BIG FAT DUMG THREAD!!!!!!!!!!!!!!!!!!

Wow very shallow depth on that Cali quake.

[link to earthquake.usgs.gov]

[link to www.sciencedaily.com]

I usually don't log in to post but decided to do so as I'm researching previous earthquakes off the Oregon Coast.

There was a one in the same region just a few months back.

USGS recorded it as a 5.3 but news sources are still reporting that it was 5.9:

Date-Time Thursday, October 13, 2011 at 04:13:59 UTC
Wednesday, October 12, 2011 at 08:13:59 PM at epicenter
Location 43.440°N, 127.155°W
Depth 10.3 km (6.4 miles)
Region OFF THE COAST OF OREGON
Distances 233 km (144 miles) W of Coos Bay, Oregon
277 km (172 miles) WSW of Newport, Oregon
277 km (172 miles) NW of Brookings, Oregon
365 km (226 miles) WSW of SALEM, Oregon
[link to earthquake.usgs.gov]

News Reports
[link to www.google.com]


Here's the stats for yesterday's 6.0 for comparison:

Magnitude 6.0
Date-Time Wednesday, February 15, 2012 at 03:31:20 UTC
Tuesday, February 14, 2012 at 07:31:20 PM at epicenter
Location 43.536°N, 127.381°W
Depth 10 km (6.2 miles)
Region OFF THE COAST OF OREGON
Distances 256 km (159 miles) W of Coos Bay, Oregon
293 km (182 miles) WSW of Newport, Oregon
302 km (187 miles) NW of Brookings, Oregon
380 km (236 miles) WSW of SALEM, Oregon
[link to earthquake.usgs.gov]

The swarm there started on 2/4 with a 3.0 as far as I can find. Then shortly after a 2.5, and then a 4.3 and then a 4.8.

Also on 4th Vancouver Island eqs 4.8 & 5.6.

Then on 2/7 there was a 3.4 offshore Oregon in same area.

Then yesterday the 6.

Someone on another forum who seemed knowledgeable suggested that the Gorda plate slipped in rotational movement & then the JDF started to accelerate until it locked again.

He/she were apparently basing this on the sequence & exact location where the above listed eqs happened and the pattern it created.


I'm not an expert but what they said made sense so you may be correct - there was some kind of slip. The person on that forum apparently has been following the Cascadia & JDF for quite awhile and understands it well.

I'd give a link but don't think it's allowed. I'll just say it's that huge, confusing, gawdy forum that it's so hard to find anything on and they have rules up the ykw! Their only saving grace is that some people who are really up on seismic/volcanic info post there. I don't go there much but do for seismic/volcanic info when something like this is happening since they are really into it.

So anyway, many on here know which one I'm talking about. I wish some of those posters would come over here and post on eqs also.

Aftershock ?
[link to earthquake.usgs.gov]

No, don't think so. Here's a map. That one's just 9 miles off the coast?

[link to earthquake.usgs.gov]

wow....

Big quakes on one little spot...

So what your saying is, is that earthquakes don't occur around volcanoes. And that any earthquake around a volcano is not an earthquake, but an eruption. Sure discounts what I have been reading about both. You are correct in saying that it is a subduction zone. But, there is also evidence of an ancient caldera there. As a matter of fact, there are many subduction zones all over the world which are littered with active, and inactive volcanoes. Another ancient caldera would be Yellow Stone. Which not only produces harmonic tremors, but has been known to produce some rather strong earthquakes. But then again, I was only reading from science journal's, and not really listening to the experts here on GLP. Guess I was reading the wrong information.

Harmonic tremors are quakes, quakes that happen to occur where a volcano is, read up on that.

If it was volcanic activity as some here suggest then the 6.0 would have been the volcano blowing, the size gives it away.

If it was volcanic activity as some here suggest then we would see harmonic tremors before it blew.

I am discounting the quake as being volcanic in nature due to it's size and with no precursors, a quake that size would not be the rumblings of a volcano but the volcano erupting. Also due to the fact it is on the subduction zone that moves nearly 4cm a year and hasn't stopped moving in over 300 years and is on a 300 year cycle ...

Anyway, you should learn to read properly, I hope you don't read 'journals' the way you read posts in forums, I didn't once say eq's don't occur on volcanoes.

Yeah, its amazing whats down there. When I was watching this live last year, I was simply in awe of the footage. These video's are just highlights of each dive, which each lasted up to 6 hours.

Ick! My son is living in Lincoln City!