Quake Watch 2010

We had similar here near Gisborne 2002,2004 amd May this year, but way shallower.
I replied in your thread westcoast

PuterMan might be able to work out the energy released from all these?
445 quakes in 24 hrs approx mag 1.0-2.0 = 9.0Mw? , 4.0mb?, a 5.0ML?

Maybe the PNW is dodging a 9.0 Mag bullet right here and now, or it could be foreshocks for the Megathrust.

Shame .................. I liked Vancouver
(just kidding I hope)

Overlaying the tremor map on top of a Google Earth plan of the area showing the faults in the area you can see that the tremors are pretty much connected to those faults.



The surprising thing is the regularity. Still looking.

lasertaglover already posted this, but again I think usgs are sweeping it in under the 6.0 magnitude carpet

This is the data from the networks;

Magnitude, Type, Date(y/m/d) Time(hh:mm:ss), Latitude, Longitude, Depth km, Location, Source
5.9Mw, 2010/08/16 19:35:49, -20.768, -178.739, 597.1, Fiji Region, usgs
5.6, mb, usgs
7.0 ML, usgs
6.0, Mw? 2010/08/16 19:35:47, -20.73, -178.71, 577, Fiji Region, geofon
6.2, Mw, 2010/08/16 19:35:46.9, -20.81, -178.66, 574, Fiji Region, emsc
6.2 Unk, 2010/08/16 19:35:46.9, -20.5669, -178.797, 600, Fiji Region, geoaus
rasgs offline

usgs= United States Geological Survey
emsc= European- Mediterranean Sismological Centre
geofon= German Research Centre for Geosciences
rasgs= Russian Academy of Sciences Geological Survey
geoaus= Geoscience Australia

emsc may downgrade it later, as I notice they have done in the past.
Looking at the phase data, Port Moresby recorded it highest as a 7.1Mb on the geofon network, and 7.0? on the neic network. Usgs give it a 7.0ML at the top of their phase data so thats another one for the 7+ list, making it 24 for 2010 now.

I always thought ML came out smaller than Mb or Mw? based on observations of hsitoric data from NOAA and ANSS.
in this case it didn't


I have e-mailed geoscience australia to clarify what type their magnitude is

This thread has become very technical lately.

Sorry I cannot contribute to the technical end of things.

reply to post by berkeleygal


Sorry, maybe I should post that stuff on the Magnitude thread.

In fact I will, even if I am talking to myself, perhaps build a case for the argument that " data is being manipulated"

Originally posted by PuterMan
reply to post by westcoast

 

I am taking a look at it now, but if the experts can't determine what is going on, what chance has we.

You could say that this quote from the article is good news. "tracking non-volcanic tremor through beamforming"

Edit: Just to say - you know that film 'Tremors'.............

[edit on 16/8/2010 by PuterMan]

Oh thank God! Here I have been worried about indicators part of my State might fall into the ocean, and all along its only been giant worms!!!!

Seriously though, here is a cut-n-past from my response on the other thread. I know, I know,more theories. I just can't help myself. When the experts are stumped it just opens the door WIDE!!!

****Insert lightbulb icon here***

Okay, so apacheman and I had discussed the whole water comparisson before, but we didn't know there was a documented link. Thanks Muzzy

Zachi...what you said just made it come together for me!!

THEORY WARNING!.....

SO, going back to my OP on my what's going on in wasington thread (where I speculate a large magma chamber is feeding both the cascade range AND a recently discovered underwater volcano off the coast), wouldn't the whole magma flowing in a slow water-like current make sense? I mean, try and picture it: The largest magma chamber yet discovered sits under about half of Washington State, extending out under the seafloor to the Juan de Fuca fault. It is SO large, SO massive, that the magma has its own ebb and flow, like the ocean currents. Perhaps the tidal pull of the moon also affects it (like the ocean), explaining the 14-15 month cycle.

It would also explain why when the Explorer plate broke off the Juan de Fuca plate 5-7 million years ago, it could have displaced a large amount of magma,resulting in the increased magmatic activity and rise of the cascades.


So now, if you still think along those lines, the next question for me is what does it all mean? Why did the deep tremor, (possibly the movement of magma) start in 2002? Why is it increasing, or is just that there are better monitors now? How is it affecting the subduction zone? (I mean, come on, it has to be) What is next?

EDIT TO ADD: I have been following webicorder closely since it seems to show the tremors the best. I just looked at it and it's going crazy! Check it out: HERE



[edit on 16-8-2010 by westcoast]

reply to post by muzzy


If they were ALL 2.0 then it would only be the equivalent of a 3.77

2 1000 445,000
3.77 451,856

Not really much to shout about. If 225 were 1.0 and 200 were 2....

1 32 7115
2 1000 400,000
407,115

3.74 407,380

reply to post by westcoast


I think I would be looking at this one

Olymic Natural Resources Centre

Better picture of the micro-quakes and not so much wind or man made interference perhaps?

Originally posted by PuterMan
reply to post by muzzy

 

If they were ALL 2.0 then it would only be the equivalent of a 3.77

2 1000 445,000
3.77 451,856

Not really much to shout about. If 225 were 1.0 and 200 were 2....

1 32 7115
2 1000 400,000
407,115

3.74 407,380

Well that not much at all.

I read this in Wikipedia

"These events are marked by about two weeks of 1-10Hz trembling that are only detectable by sensitive seismometers, accompanied by aseismic slip on the megathrust that is equivalent to an M7 earthquake."

en.wikipedia.org...
not the most reliable source I know

One for the Wymoming Watchers



Magnitude 4.3
Date-Time

* Tuesday, August 17, 2010 at 02:49:55 UTC
* Monday, August 16, 2010 at 08:49:55 PM at epicenter

Location 43.616°N, 110.499°W
Depth 5 km (3.1 miles) set by location program
Region WYOMING
Distances

* 27 km (17 miles) E (83°) from Teton Village, WY
* 27 km (17 miles) NE (54°) from Jackson, WY
* 29 km (18 miles) ENE (71°) from Moose Wilson Road, WY
* 338 km (210 miles) NNE (19°) from Salt Lake City, UT

reply to post by MoorfNZ


lol you beat me too it. I was wondering if that was a bit large for Wyoming?

reply to post by PuterMan


Thanks, I'll keep an eye on that one. Interesting to have the possible energy release figured out. I know that there isn't a lot involved, hence the very low hz...it's more what is behind it that has me wondering. Or more importantly, what it indicates (if anything).

If there IS a direct link with the subduction zone slipping (which the ETS name itself seems to indicate) then ANY kind of tremor worries me a bit.

So how about the Wyoming quake? Shows up nice and stong in the park.

reply to post by muzzy


Fiji been upgraded to 6.2Mw by usgs thats 0.3 difference, I wonder what the energy output difference is between 5.7Mw and 6.2Mw?

North of NZ's north island rumbled

Magnitude 5.2
Date-Time

* Tuesday, August 17, 2010 at 10:43:57 UTC
* Tuesday, August 17, 2010 at 10:43:57 PM at epicenter
* Time of Earthquake in other Time Zones

Location 30.265°S, 177.137°W
Depth 35 km (21.7 miles) set by location program
Region KERMADEC ISLANDS, NEW ZEALAND
Distances 135 km (85 miles) SSE of Raoul Island, Kermadec Islands
215 km (130 miles) NE of L'Esperance Rock, Kermadec Islands
1050 km (650 miles) NE of Auckland, New Zealand
1425 km (880 miles) NNE of WELLINGTON, New Zealand

Puterman, Thank you so much for all your hard work - it is very much appreciated. Still trying to wrap my brain around it, which has been difficult due to other things going on.

We had another 3.0 in WY which followed the 4.3.

and then there is this for Westcoast - I'm not liking the deep tremors at all!

Magnitude 4.2
Date-Time Tuesday, August 17, 2010 at 11:37:58 UTC
Tuesday, August 17, 2010 at 04:37:58 AM at epicenter
Time of Earthquake in other Time Zones

Location 50.793°N, 129.909°W
Depth 10 km (6.2 miles) set by location program
Region VANCOUVER ISLAND, CANADA REGION
Distances 175 km (110 miles) W of Port Hardy, British Columbia, Canada
195 km (120 miles) SW of Bella Bella, British Columbia, Canada
345 km (215 miles) WNW of Campbell River, British Columbia, Canada
540 km (335 miles) WNW of VICTORIA, British Columbia, Canada

Location Uncertainty horizontal +/- 9.9 km (6.2 miles); depth fixed by location program
Parameters NST= 69, Nph= 69, Dmin=564.4 km, Rmss=1.14 sec, Gp=169°,
M-type=body wave magnitude (Mb), Version=6
Source USGS NEIC (WDCS-D)


Event ID us2010abbw


This is today's Earthquake fact from the USGS:

"Alaska is the most earthquake-prone state and one of the most seismically active regions in the world. Alaska experiences a magnitude 7 earthquake almost every year, and a magnitude 8 or greater earthquake on an average of every 14 years (on average)".

Wasn't the last one the 9.2 which hit in 1964 the last one above 8.0? Hummm - Westcoast, in 2002 - there was a 7.9 which triggered Yellowstone - I imagine that there must be some connection which might account for the tremor - didn't that start in 2002 as well?



[edit on 17-8-2010 by Anmarie96]

Originally posted by muzzy
reply to post by muzzy

 

Fiji been upgraded to 6.2Mw by usgs thats 0.3 difference, I wonder what the energy output difference is between 5.7Mw and 6.2Mw?

[atsimg]http://files.abovetopsecret.com/images/member/03d17866c14f.png[/atsimg]

Note: This saves writing three lines of text so I hope it qualifies as two lines!

reply to post by Anmarie96


Brilliant!!!! I hadn't even thought of that! I Think it is very reasonable to suggest there might be a connection.

Notice the 4.2 quake is directly on the Explorer fault (the portion that broke off the Juan de Fuca plate). Going back again to my most recent theory, it would make sense for this area to become active if I am anywhere near correct. Although....having said that, it makes me a little more uncomfortable. I am off to check all the local seismos and volcanoes for signs of activity!

hummm

Magnitude 2.4
Date-Time Tuesday, August 17, 2010 at 19:39:07 UTC
Tuesday, August 17, 2010 at 12:39:07 PM at epicenter

Location 46.362°N, 122.257°W
Depth 12 km (7.5 miles) set by location program
Region WASHINGTON
Distances 19 km (12 miles) NNW (342°) from Mount St. Helens Volcano, WA
22 km (14 miles) S (175°) from Morton, WA
26 km (16 miles) SE (137°) from Mossyrock, WA
59 km (37 miles) ENE (65°) from Longview, WA
85 km (53 miles) NNE (18°) from Vancouver, WA

Location Uncertainty horizontal +/- 0.8 km (0.5 miles); depth fixed by location program
Parameters NST= 53, Nph= 53, Dmin=3 km, Rmss=0.21 sec, Gp= 72°,
M-type=duration magnitude (Md), Version=0
Source Pacific Northwest Seismograph Network

Event ID uw08171939

reply to post by Anmarie96


Yup....BIG hmmmm. Also, there were a couple of other smaller quakes so far today, one of them under Port Townsend, where I believe the heart of the tremor is right now.

MAP 2.8 2010/08/17 19:39:07 46.361 -122.251 12.3 19 km ( 12 mi) NNW of Mount St. Helens Volcano, WA
MAP 1.2 2010/08/17 12:05:06 48.146 -122.701 24.7 6 km ( 4 mi) ENE of Port Townsend, WA
MAP 1.7 2010/08/17 10:48:59 47.344 -122.406 15.6 6 km ( 4 mi) NW of Federal Way, WA
MAP 1.9 2010/08/16 18:42:08 47.704 -120.326 1.4 9 km ( 6 mi) WNW of Entiat, WA
MAP 1.6 2010/08/16 10:20:20 46.534 -121.803 0.0 30 km ( 18 mi) SE of Ashford, WA


LINK

reply to post by muzzy


So basically what they are saying is that there is a movement of the plates that is the equivalent to the effect/power of a mag 7 quake, but which is not accompanied by earthquakes (aseismic) other than the preceding deep tremors.

From the Wiki article:

For some GPS stations around the ETS, there is an apparent slipping back or reversal of direction of the normal tectonic plate movement, although the fault motion remains consistent with subduction.

It goes into reverse? *walks away with mind boggling trying to imagine reverse subduction*