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Author Topic: All USArray Magnetotelluric (EarthScope) stations  (Read 6006 times)

Offline kdog

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All USArray Magnetotelluric (EarthScope) stations
« on: August 28, 2012, 05:15:11 pm »
I have a question to pose to the fine minds of PRC.

What the heck is this and why the specific locations?

http://www.iris.edu/gmap/_US-MT

Offline Littleenki

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Offline Littleenki

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Re: All USArray Magnetotelluric (EarthScope) stations
« Reply #2 on: August 28, 2012, 05:35:16 pm »
Thats what its for..but where?
Thats a good question...DUMBs?
Le
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sky otter

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Re: All USArray Magnetotelluric (EarthScope) stations
« Reply #3 on: August 28, 2012, 06:35:28 pm »

some things i found
this one is older but kinda explains
obviously they move around


https://meetings.vtools.ieee.org/meeting_view/list_meeting/6199


May 26, 2011
Blairs Ferry Metro Buffet


EarthScope: The Magnetotelluric Transportable Array Moves into Iowa
or 'This Earth is Shaking-Seismic Stations in Iowa and across the US'


Speakers:  Ray Anderson of Iowa DNR

Topic: The Magnetotelluric Transportable Array Moves into Iowa

EarthScope is a National Science Foundation sponsored program to explore the 4-dimensional structure of the North American continent through the installation of multi-purpose arrays of instruments and observatories. Major EarthScope projects include the Plate Boundary Observatory, the San Andreas Fault Observatory at Depth, and the USArray.

One component of the USArray is the Magnetotelluric Transportable (MT) Array, which consists of two portable arrays of 200 seismometers each that are being deployed in north-south strips abut 200 miles wide that span the nation. Starting on the west coast, stations in each strip will record world-wide earthquakes and other seismic signals for 2 years before being moved eastward. The program will image the entire continental US between 2004 and 2014.

In this presentation I will discuss the EarthScope program and how the MT Array will be used to understand the deep structure of Iowa and North America. A permanent seismic monitoring station was installed near State Center, Iowa, and has been operated since 2006 by the U.S. Geological Survey. More information on the State Center station can be obtained at: http://earthquake.usgs.gov/monitoring/operations/station.php?network=US&station=SCIA. A record of the seismic activity recorded at the State Center station in the last 24 hour period can be viewed at: http://aslwww.cr.usgs.gov/Seismic_Data/telemetry_data/SCIA_24hr.html. Twelve temporary stations of the MT Array were installed in western Iowa last fall and 20 additional stations will be installed in eastern Iowa this June and July.

Biography: <b>Ray Anderson</b> is a Senior Research Geologist with the Iowa Geological and Water Survey in Iowa City, a bureau of the Iowa Department of Natural Resources. He has been a geologist for the Survey for over 40 years. Ray has studied almost every aspect of Iowa’s geology, but has specialized in our oldest rocks, the Precambrian, as well as meteorites and impact structures, and the Jurassic of Iowa including the Fort Dodge gypsum deposits. He is also active in the Iowa Academy of Science where he has served as the President and on the Board of Directors. <p>Ray has well over 100 publications and professional presentations on numerous geologic features in Iowa, and has organized and produced about 30 geologic field trips for the Survey and the Geological Society of Iowa. <p>Ray also serves as an Adjunct Associate Professor in Geology at the University of Iowa Department of Geoscience.

Email: Raymond.Anderson@dnr.iowa.gov

Address: Iowa, United States

 
Topic: EarthScope Stations





................................................................................................

ok..here ya go

http://www.earthscope.org/observatories/usarray/

More Info
Each USArray station will include the instrumentation necessary to continuously sense, record, and transmit ground motions from a wide range of seismic sources, including local and distant earthquakes, artificial explosions, volcanic eruptions, and other natural and human-induced activities. Over the wide frequency range of seismic waves transmitted through the Earth (hundreds of seconds to ten cycles per second), the sensors of the permanent and transportable seismic and magnetotelluric arrays will resolve the smallest background motions at the quietest of sites, while remaining “on scale” for all but the largest ground motions from regional earthquakes.

Offline kdog

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Re: All USArray Magnetotelluric (EarthScope) stations
« Reply #4 on: August 28, 2012, 06:54:24 pm »
http://en.m.wikipedia.org/wiki/Magnetotellurics
Le

Quote
Magnetotellurics (MT) is an electromagnetic geophysical method of imaging the earth's subsurface by measuring natural variations of electrical and magnetic fields at the Earth's surface. Investigation depth ranges from 300m below ground by recording higher frequencies down to 10,000m or deeper with long-period soundings. Developed in Russia and France during the 1950s, MT is now an international academic discipline and is used in exploration surveys around the world. Commercial uses include hydrocarbon (oil and gas) exploration, geothermal exploration, mining exploration, as well as hydrocarbon and groundwater monitoring. Research applications include experimentation to further develop the MT technique, long-period deep crustal exploration, and earthquake precursor prediction research.

So,I wonder if it plays into this study....

http://www.mitp.ru/en/default.html

Offline zorgon

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Re: All USArray Magnetotelluric (EarthScope) stations
« Reply #5 on: August 28, 2012, 07:20:38 pm »
I wonder how many of those in lace coincide with the weird noise locations

 8)

Offline kdog

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Re: All USArray Magnetotelluric (EarthScope) stations
« Reply #6 on: August 28, 2012, 07:27:02 pm »
I wonder how many of those in lace coincide with the weird noise locations

 8)

Very interesting question you pose........

mmmm

sky otter

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Re: All USArray Magnetotelluric (EarthScope) stations
« Reply #7 on: August 28, 2012, 07:38:36 pm »
well i can tell ya a little story on what might be a side issue
we have marcellous shale drilling going totally nuts around here and the local councils have been approached to let this company come in and map the sub surface so they can sell the info to big companies.. i will add the local news story  in a sec

one of the problems is the state has said they can do this on the stae roads.. and there are state roads all thur the local communities so some of it is going to happen no matter what the communities have to say

the other thing is money.. most small boro's are straped for cash and ..well you know how it goes
oh and the other thing..in the supreme court they are argueing how deep your mineral rights go and if the marcellous is beyond them,...giving the drillers pretty much total profit

ok..

here's the company site
http://www.iongeo.com/About_Us/Corporate_Overview/GX_Technology/
GX Technology's image-driven approach and innovative technologies produce the highest fidelity land and marine subsurface images and reduce the risk and cost of finding and producing hydrocarbons. With the addition of GMG software products, we have expanded products and services through the entire seismic process, from survey design to advanced imaging solutions. By developing new technologies, new methodologies, and new business models, we provide our clients with significantly greater value from their seismic data.

As one of the leaders in PreSDM, we undertake the most sophisticated depth-imaging projects. This includes targets that are at extreme depths, obscured by salt or gas clouds, or defined by complex structure and stratigraphy. We also have the ability to overcome imaging challenges presented by velocity anisotropy, near-surface velocity anomalies, and complex reservoir fracturing. Our latest research emphasis is on converted-wave and full-wave processing, the results from which have already been applied to image reservoirs onshore in North America and offshore in the Gulf of Mexico.

Our range of seismic imaging services for land and marine environments include:

•2D, 3D, and 4D seismic data processing
•Multicomponent seismic processing
•OBC processing
•3D VSP processing
•Noise removal and de-multiple technology
•Pre-stack velocity modeling
•Geophysical analyses
•Statics
•PreSTM, PreSDM
•Azimuthal velocity analysis
•Reverse Time Migration (RTM)
With geophysical service centers strategically located in North America, Europe, West Africa, and Latin America, we are poised to deliver answers where only questions once existed.


and the news article

Shale mapping effort in Alle-Kiski Valley concerns local officials


By Brian C. Rittmeyer

Published: Saturday, August 11, 2012, 1:01 a.m.
Updated 12 hours ago


A Texas company’s plan to map the Marcellus shale formation under thousands of acres has some Alle-Kiski Valley municipal leaders concerned.

Representatives of Ion GX Technology have been crisscrossing the region in recent weeks, asking borough councils and township supervisors for permission to conduct a seismic survey across roads and road rights-of-way.

The Houston-based company will also seek permission from landowners for placement of recording devices and locations where underground explosive charges would be detonated in holes drilled 30 feet deep to vibrate the ground.

Ion plans to map under a 281-square-mile area, nearly 180,000 acres. It covers nearly all of central and southern Armstrong County, crossing into portions of Westmoreland and Indiana counties.

Permitting for the project is under way, with permit agents working generally from the north to the south of the area. It could be several months before some of the landowners in the southern portion of the area are contacted, said Shawn Rice, vice president for operations of Ion Geophysical’s GeoVenture group.

Landowners can expect to be contacted by letter, phone call or personal visit, Rice said. They will be given letters containing the legal description of the property for the landowners and a brief description of the work to be performed, and asking for their permission to allow a crew to enter the property and perform the work.

“It also describes terms for access, damages (if any occur) and allows for the landowner to describe any special stipulations they may possibly have,” Rice said. “The landowners are within their full rights to grant or deny their permission.”

Rice said it’s not uncommon for landowners to deny his company access for this type of survey. In those cases, “We plan the programs to avoid accessing their properties.”

“It’s their land. We can’t enter their land without their permission,” Rice said.

Preparation work for the mapping project could begin in November, first with survey crews followed by drillers, Rice said. Active mapping would begin in February and take about four months, he said.

The company’s staff chose and defined the area to be mapped based on its own research, activity in the
market and input from potential customers of the data, Rice said.

The company has completed similar surveys elsewhere in Pennsylvania and in Colorado, Wyoming and West Virginia since 2008.

Ion will own the three-dimensional map of the Marcellus shale formation that it produces and license it to oil and gas companies that would use it in developing leases, planning drilling programs and determining where to place wells, Rice said.

“There’s a lot of interest in the Marcellus at this point,” Rice said. “What we’re looking to do is define not only the locations of the Marcellus shale there, but help those interested understand more about the specific variability in the shale, such as changes in fractures, fracture patterns and different geological attributes.”

One buyer of the data is Chevron, said Trip Oliver, a spokesman with the company in Pittsburgh.

Although an Ion representative appearing before Apollo Council identified Chevron as a “primary sponsor” of the mapping effort, Oliver said Chevron is a client of Ion and is not directing the survey.

Local concerns

Attorney Jim Favero serves as solicitor for Leechburg, West Leechburg, Gilpin, Parks and South Buffalo. All of the municipalities have received a permit request from Ion.

Ion is asking for permits to come into municipalities to conduct activities, Favero said.

Favero said elected officials are concerned about damage from the use of so-called “thumper trucks,” which can be used to create the vibrations used in the mapping process.

The borough and township concerns are slightly different, Favero said. In the more densely populated boroughs, officials are worried about damage to roads, homes and underground utilities. Township officials’ concerns are mainly about roads.

“The thumper trucks are overweight. They’re greater than the 10-ton weight limits placed on township roads,” he said. “The first issue is what roads are they going to be using, how are they going to come in, what are they going to do, how frequently will they be stopping, that kind of thing.”

Several municipal officials said Ion representatives have brought up the use of the trucks in presentations. The company’s permit request to Leechburg said such vehicles could be used along roads to fill in areas where it can’t place charges or vibration equipment on private land.

However, Rice said Ion has no intentions of using the trucks on this project.

“Our primary source is going to be these small explosive charges,” he said.

West Leechburg and Vandergrift officials have turned over Ion’s requests to their solicitors and engineers for review.

“We figure they’re going to do it anyway,” West Leechburg Councilman Tim Grantz said. “The general feeling of council is we need to cooperate and work with them to minimize any issues.”

At a recent Vandergrift Council meeting, officials warned Ion representatives that millions of dollars of insurance would be needed for Ion to get permission to proceed.

Allegheny Township Manager Greg Primm said he met with Ion representatives last week and discussed road bonding requirements.

“We don’t have any authority to require anything else from them,” he said, describing the company as “cooperative.”

“They seemed like they’d do whatever they need to do,” Primm said.

Favero said he expects Gilpin supervisors to discuss the company’s request at their meeting Monday.

In Leechburg, Councilman Jim Spiering asked what would be done if damages are found after the surveyors are gone.

After discussing the company’s request on Aug. 6, Leechburg Council will ask that a representative appear before it on Sept. 4 to provide more information and answer questions.

Rice said the company would fix or otherwise make right any damages.

If a truck laying equipment leaves ruts, they will be repaired, he said. If crops are damaged, the farmer would be paid for their value.

Rice said Ion wants to build a good reputation in case it has to return to the area again.

“There’s a lot of effort that goes into doing right by folks,” he said.

Brian C. Rittmeyer is a staff writer for Trib Total Media. He can be reached at 724-226-4701 or
brittmeyer@tribweb.com.
http://triblive.com/neighborhoods/yourallekiskivalley/2286466-87/ion-mapping-company-officials-rice-shale-concerns-survey-leechburg-local
« Last Edit: August 28, 2012, 07:42:23 pm by sky otter »

Offline Littleenki

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Re: All USArray Magnetotelluric (EarthScope) stations
« Reply #8 on: August 28, 2012, 08:29:56 pm »
What makes me look harder is the statement.."for the sensing, reception, and TRANSMISSION of low to medium frequency signals"

WTF are they transmitting ELF frequencies into the earth from so many stations for anyways?

Those signals travel way farther than the distance between the stations in place, so why do they have so many?

Earthquake detection in Iowa? Really?

Quote
WATERLOO (KWWL) -- Since experts began taking seismic records in Iowa, 13 earthquakes have hit within the state.
 
The most recent was in 2004 in Fremont County.  The second most recent earthquake happened in 1948 in Oxford.  Click here for a map and the complete list from the Iowa Geological Survey.
 
Geologists say the most severe earthquake to ever impact Iowa was the New Madrid earthquake in 1812.  It was centered in southeast Missouri and actually made the Mississippi River flow backwards for a time.


http://www.kwwl.com/global/story.asp?s=11817236

Earthquakes in Iowa?

My Ass! :o

Le
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Offline zorgon

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Re: All USArray Magnetotelluric (EarthScope) stations
« Reply #9 on: August 28, 2012, 08:38:28 pm »
Earthquake detection in Iowa? Really?
Earthquakes in Iowa?
My Ass! :o

Iowa Seismicity Map - 1973 to Present



Historic Earthquakes in Iowa
1905 04 13 - Iowa

Last Earthquake in ...
Preliminary Earthquake Report
Magnitude 3.3 IOWA
2004 July 16 12:17:30 UTC



2.0–2.9    Minor    Generally not felt, but recorded.
3.0–3.9     Minor        Often felt, but rarely causes damage.

might have shook the coffee  :o

Offline kdog

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Re: All USArray Magnetotelluric (EarthScope) stations
« Reply #10 on: August 29, 2012, 07:23:43 pm »
So,Zorg,you found one from 1905.

I lived in Iowa for ten years(wish I could get those back) jk,my family is deeply rooted there.
They are searching for resources underground,nothing more.

But corn prices are doing good.

 


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