Another Slow Tremor Moving Beneath Olympic Peninsula

reply to post by westcoast


I wish I could experience first hand what you are hearing!

and yes this year is starting out weird. all those stories on the "Chickens" thread are strange.

I just sit here wondering what's next ya know? Trying to keep an eye on everything at once, nothin better to do eh?

reply to post by berkeleygal


I hear ya. I even found myself going around my house and digging out all our compasses at another ATS member's suggestion. Know what I found? That NE is now the new North. Very strange stuff.

Magnitude 2.6
Date-Time Friday, January 07, 2011 at 22:35:40 UTC
Friday, January 07, 2011 at 02:35:40 PM at epicenter
Time of Earthquake in other Time Zones

Location 47.816°N, 121.951°W
Depth 19.2 km (11.9 miles) set by location program
Region PUGET SOUND REGION, WASHINGTON
Distances 5 km (3 miles) SSE (149°) from Monroe, WA
8 km (5 miles) ENE (62°) from Echo Lake, WA
9 km (6 miles) NNE (12°) from Duvall, WA
29 km (18 miles) NNE (33°) from Bellevue, WA
36 km (22 miles) NE (54°) from Seattle, WA

Location Uncertainty horizontal +/- 0.8 km (0.5 miles); depth fixed by location program
Parameters NST= 53, Nph= 54, Dmin=6 km, Rmss=0.4 sec, Gp= 32°,
M-type=duration magnitude (Md), Version=0
Source Pacific Northwest Seismograph Network

Event ID uw01072235

reply to post by Shenon


Yup..not far from me. They upgraded it to 3.0

They haven't added any of those micro quakes

[atsimg]http://files.abovetopsecret.com/images/member/c9677704f9d5.jpg[/atsimg]

reply to post by berkeleygal


Thank you for posting that! Now, what I find interesting, is comparing that map to THIS one. Note the recent quakes near the Cali/OR border and recent quakes in the PNW.

[atsimg]http://files.abovetopsecret.com/images/member/db1c5d70bf17.jpg[/atsimg]

[atsimg]http://files.abovetopsecret.com/images/member/3c148c669b0a.jpg[/atsimg]

reply to post by berkeleygal


You beat me to it!! I saw there seemed to be a bit of a correlation too. Did you check out the tremors today yet? I mean, WOW. 343 epcicenters, mostly in Southern Oregon and Northern Cali.

LINK

reply to post by westcoast


yup, bouncing all over the place today

[atsimg]http://files.abovetopsecret.com/images/member/4a7d944e2686.jpg[/atsimg]

This gives me an uneasy feeling. Usually these tremors follow the plate depth. Also it look's like the Nisqually area never get's any of these slow tremors.. I've noticed these tremors seem to be moving northward faster from CA than they move southward from Vancouver Island. Which puts the Nisqually area right in the middle..

reply to post by Isaac (RIP DUSTIN)


Thanks for posting the map...I love that visuall. I agree with you. They are behaving differently, and I think the team that studies these is probably considering whether to re-deploy their teams. Don't you thin? If these numbers continue, you would have to say it is active again!

I am now wondering if that one station on the peninsula isn't picking up the deep tremors? If they are getting shallower, or changing, wouldn't it stand to reason that they may be registering on other equipment possibly?

[atsimg]http://files.abovetopsecret.com/images/member/90bc5dc4183b.jpg[/atsimg]

I know that it has been awhile....but given what is going on quake-wise in the world today, and tonight being a perigee moon, I found the tremors today a bit odd.

Compare this map: Tremors

to this quake map: Quakes


I dunno....it would sit right under the south end of the subduction zone I believe....and helens is still acting up, along with numerous other small quakes these past couple days:

MAP 2.5 2011/02/19 21:59:31 46.278 -122.220 3.2 9 km ( 6 mi) NNW of Mount St. Helens Volcano, WA
MAP 1.3 2011/02/19 17:28:35 47.501 -122.304 14.1 1 km ( 1 mi) SE of Riverton-Boulevard Park, WA
MAP 1.5 2011/02/19 02:04:15 48.471 -123.255 26.1 10 km ( 6 mi) ENE of Victoria, Canada
MAP 1.3 2011/02/18 17:34:35 47.673 -120.309 0.5 7 km ( 4 mi) W of Entiat, WA
MAP 1.3 2011/02/18 08:08:07 46.280 -122.210 3.9 9 km ( 6 mi) NNW of Mount St. Helens Volcano, WA
MAP 1.8 2011/02/18 05:51:43 42.392 -124.561 21.1 12 km ( 7 mi) W of Gold Beach, OR
MAP 2.4 2011/02/17 20:07:19 46.283 -122.225 1.4 10 km ( 6 mi) NNW of Mount St. Helens Volcano, WA
MAP 1.2 2011/02/17 13:29:01 48.150 -122.757 27.5 4 km ( 2 mi) NNE of Port Townsend, WA
MAP 1.4 2011/02/17 13:12:36 48.149 -122.719 23.5 6 km ( 3 mi) NE of Port Townsend, WA
MAP 1.5 2011/02/17 11:30:00 45.610 -119.964 17.9 16 km ( 10 mi) NW of Ione, OR
MAP 2.5 2011/02/17 10:55:04 46.279 -122.215 6.3 9 km ( 6 mi) NNW of Mount St. Helens Volcano, WA
MAP 1.4 2011/02/17 01:55:45 47.306 -122.305 16.2 3 km ( 2 mi) ESE of Federal Way, WA
MAP 1.8 2011/02/16 20:02:07 46.278 -122.215 5.2 9 km ( 6 mi) NNW of Mount St. Helens Volcano, WA

Hmmm... 10.7 hours and 194 epicenters... Cascadia Tremor Activity 2-19-2011
all of them north west of lake shasta (south west of Mt. Shasta)

Ok, help a girl out here. What are you all thinking about these tremors?

Is Mount Shasta about to awake?? Or are we still concerned that it will be Helens?? Or hell, are they both gonna blow?

reply to post by UtahRosebud


No, not volcanic activity directly but subduction zone movement:

In 2001, CWU researchers with the continuous GPS network Pacific Northwest Geodetic Array discovered periodic slow-slip across the Cascadia Subduction Zone. Previously undetected by seismic networks, these slip events exhibit regular recurrence intervals thus changing current understanding of earthquake behavior. Since this time, definitions for this newly discovered phenomenon have evolved. At first, the term "silent-earthquake" was employed to illustrate the absence of a seismic signature. Subsequent investigations and recent discoveries have led to a change in characterization. Now these slow-slip events are defined as eposodic tremor and slip (ETS).

In short, an ETS is a discreet time interval (episode) of relative tectonic plate movement (slip) coupled with high frequency seismic energy bursts (tremor). ETS usually last for around a few weeks duration as opposed to regular earthquakes where energy is released within seconds to minutes.

Stress between these two colliding plates builds since differential movement between the two zones is not entirely compensated from ETS displacement. Quick slip across the upper locked portion of a subduction zone occurs in large megathrust earthquakes when accumulated stresses surpass the upper region's locking threshold. In contrast, the subtle motion caused by ETS is so "slow" it's difficult to record at the surface. One might say "quiet" or possibly "silent" in nature, but definitely important since these events affect lithospheric plate interactions that are responsible for damaging "fast" earthquakes. Will the size of future large-scale megathrust earthquakes be reduced or will the time interval between these earthquakes increase with an ETS? A process with such imposing consequences is hardly "silent" in terms of relevance. In fact an ETS is not silent at all.

source

Scary stuff, eh?


This is why, on my other rumble thread, I tend to think I am hearing something geologic/possibly tectonic in nature. It is also why I think this whole region is much more dynamic than most realize. I believe everything is more intricately connected. So when I see heavy tremor activity in correlation with small quakes up and down our coastline, as well as moderate quakes at Helens, I don't like it.

reply to post by westcoast


Hell yes it's scary!

Thank you so much for responding and the information. Is there anything, other than live human virgins, we can offer up to the volcano's to help calm them down?

www.pnsn.org...

tremor action way up north now

zoom in and plot color vs time

See station B927, its right near that activity
www.pnsn.org...

anything unusual there? I am just an amateur

reply to post by berkeleygal


Geez to much going on - Thought there was a report of mass amount of Eagle die off there today.

reply to post by berkeleygal


*groan* There really IS too much going on right now. I can't keep up with it all, and now two feet of snow here!

You should hop over to my washington thread and see the conversation there...it unfortunately might tie in with those newest tremors! Lot's of quakes too.