About SPUD

SPUD Version 3.0

The Searchable Product Depository (SPUD) is the IRIS DMC's primary data product management system. Complementing the DMC's SEED and assembled data archives, which contain time series recordings, the SPUD system primarily contains derivative data products of other types (images, movies, etc.) created either at the DMC or by members of the community.

For users SPUD is the query and access point for these products. The web interfaces allow users to search for products using customized queries across product and event details. Users can search across all product types at once or within specific product types. SPUD also has web service interfaces for programmatic discovery and access to the data products.

If any products from SPUD are used in your research please be sure to cite the identified author of the product and the IRIS DMS [Citation Information].

About EMTF products

The EMTF data product contains magnetotelluric (MT) transfer functions (TFs), which define the frequency dependent linear relationship between components of electromagnetic (EM) field variations measured at a single site. Two sorts of TF are provided for most sites: 2x2 impedance tensors, and vertical field TFs, which respectively relate horizontal electric and vertical magnetic components (the outputs in the TF relationship) to the horizontal magnetic field vectors (the corresponding inputs).

Note that for some sites only impedances are provided. All of the TFs, which can be justified if external source fields are quasi-uniform (varying over length scales that are long compared to the skin depth), provide input data for subsequent MT inversion and interpretation. They are estimated from the raw EM time series by (a) Fourier transforming data in a series of short overlapping time windows, and (b) applying robust regression methods to the resulting sequence of Fourier coefficients. For remote reference estimates data from a second site are used for noise cancellation, and to reduce bias due to noise in the predicting magnetic channels. Apparent resistivities and phases, which can be computed from the off-diagonal components of the impedance tensors, are frequently used in 2D interpretations. The EMTF data product includes estimates of the TFs for a range of periods (which may vary, depending on instrumentation and deployment time), as well as estimation error covariances.

Product Query Help

This page queries for EM Transfer Function products.

Citing EM_TF Products

When citing this particular Magnetotelluric Transfer Function, please cite based on the "Citation Info" panel of this page. To cite the Magnetotelluric Transfer Function database at IRIS, please use the instructions at:

http://ds.iris.edu/ds/products/emtf/#citation


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EM Transfer Function Query Parameters
Data Quality
NA
1
2
3
4
5
Data Quality Warning
NA
0
1
Release Status
Unrestricted Release
Academic Use Only
Project
USArray
YSRP
SAGE
UofA
Lithoprobe
Periods
10-5 - 10-4
10-4 - 10-3
10-3 - 10-2
10-2 - 10-1
10-1 - 1
1 - 10
10 - 102
102 - 103
103 - 104
104 - 105
Data Quality
Quality Warning
Release Status
Project
Min Period
Max Period
Type
  • Data and Metadata
  • Metadata Only
  • All
  • All
  • USArray
  • YSRP
  • SAGE
  • UofA
  • Lithoprobe
  • All
  • Santo Domingo Pueblo
  • Alberta Basement
  • Southern Alberta Array 2010
  • 2010
  • Transportable Array
  • Yellowstone-Snake River Plain
  • Red Deer Conductor Array 2008
  • Alberta Array 2010
  • Backbone/Permanent Array
  • Alberta Array 2008
  • Southern Alberta Array 2009
  • British Columbia Array 2009
  • 2011-2013 BBMT profile
  • All
  • Unrestricted Release
  • Academic Use Only

Query Results: 1237 items found
ppPage: 1 of 13pp
Site NameSite IDLatitudeLongitudeProjectSurveyStart Time (UTC)End Time (UTC)
Hofmann Forest, NC, USAREU6034.97-77.35USArrayTransportable Array2015-12-16 19:24:342016-01-07 16:13:28
Shocco Creek, NC, USANCS5836.22-78.06USArrayTransportable Array2015-12-12 22:10:052015-12-20 19:57:33
Roanoke River, NC, USANCS5936.23-77.37USArrayTransportable Array2015-12-10 21:30:252015-12-29 21:06:14
Cape Fear, NC, USANCV5934.40-78.11USArrayTransportable Array2015-12-10 20:26:562016-01-04 05:14:55
Hoffman Forest, NC, USANCU6034.98-77.47USArrayTransportable Array2015-12-09 20:11:072015-12-16 20:59:26
Goodwin Forest, NC, USANCU5735.34-79.48USArrayTransportable Array2015-12-09 17:44:532016-01-06 15:45:28
Buffalo Cove, NC, USARET5436.07-81.50USArrayTransportable Array2015-12-07 21:16:032015-12-19 18:40:44
Longleaf Pine, SC, USASCW5734.00-80.12USArrayTransportable Array2015-12-06 16:56:512015-12-13 15:05:37
Forty Acre Rock, SC, USASCV5634.66-80.52USArrayTransportable Array2015-12-03 20:30:312015-12-27 16:27:51
Little Elk Creek, WV, USAREQ5338.00-81.59USArrayTransportable Array2015-12-02 19:58:542015-12-11 21:52:43
Francis Marion, SC, USASCX5833.28-79.61USArrayTransportable Array2015-11-24 19:13:072015-12-11 20:36:31
Locust Fork, AL, USAREX4934.05-86.49USArrayTransportable Array2015-11-21 20:22:212015-12-23 05:51:54
Turkey Creek, SC, USAREV5534.90-81.34USArrayTransportable Array2015-11-20 20:40:402015-12-13 06:48:06
Beech Branch, SC, USASCY5632.91-81.28USArrayTransportable Array2015-11-17 18:23:492015-12-22 22:05:06
Beaverdam Branch, SC, USASCW5634.28-80.78USArrayTransportable Array2015-11-15 21:46:272015-12-22 16:37:37
WHITE ROCK, NC, USANCT5436.15-81.62USArrayTransportable Array2015-11-15 21:02:352015-11-20 17:45:23
Sessoms Timber, GA, USAGAB5531.14-82.75USArrayTransportable Array2015-11-13 17:18:192015-11-22 18:33:53
Tribble Mill, GA, USATTX5233.90-83.91USArrayTransportable Array2015-11-12 21:03:402015-12-13 21:09:07
COMPTON CREEK, OH, USATTO5339.54-83.32USArrayTransportable Array2015-11-10 17:12:302015-11-21 19:50:01
GOLD HILL, VA, USAVAS5436.61-81.28USArrayTransportable Array2015-11-06 22:49:062015-11-20 22:04:56
Meadow Creek, SC, USATTV5435.04-82.19USArrayTransportable Array2015-11-06 22:17:432015-11-18 20:30:08
Taylor Nursery, SC, USASCX5533.74-81.81USArrayTransportable Array2015-11-05 19:28:032015-11-17 21:36:23
Acadia Cliffs, OH, USAOHO5239.33-81.84USArrayTransportable Array2015-11-04 17:37:292015-11-12 15:15:54
Davis Pond, SC, USASCX5633.52-81.06USArrayTransportable Array2015-11-04 17:06:282015-12-12 19:29:54
Victoria Bluff, SC, USASCZ5732.28-80.81USArrayTransportable Array2015-11-03 18:07:492015-12-05 16:06:21
HILLS and DALES, OH, USAREO4939.71-84.18USArrayTransportable Array2015-11-03 17:16:232015-11-22 17:12:12
Green Pond, SC, USASCY5732.68-80.58USArrayTransportable Array2015-11-02 17:24:162015-11-30 12:40:46
Duck Creek, IN, USAREN4740.36-85.76USArrayTransportable Array2015-11-02 16:33:152015-11-10 11:55:20
CHEIF CORNSTALK, WV, USAWVP5238.73-82.04USArrayTransportable Array2015-11-01 18:01:102015-11-09 21:08:32
Akers Branch, KY, USAKYR5237.46-82.64USArrayTransportable Array2015-10-31 16:44:382015-11-09 16:44:14
Channels Forest, VA, USAVAS5336.85-81.99USArrayTransportable Array2015-10-26 17:20:462015-11-13 19:19:51
South Mountains, NC, USANCU5435.61-81.76USArrayTransportable Array2015-10-25 19:29:102015-11-17 18:10:11
Leepers Creek, NC, USANCU5535.46-81.12USArrayTransportable Array2015-10-22 16:37:062015-11-23 12:14:28
Pisgah Forest, NC, USANCU5335.66-82.44USArrayTransportable Array2015-10-21 21:27:012015-12-06 19:32:00
Nantahala Forest, NC, USANCV5235.17-83.61USArrayTransportable Array2015-10-20 21:14:412015-10-29 15:37:05
Sourdough Ridge, WV, USAWVR5337.39-81.87USArrayTransportable Array2015-10-19 22:33:462015-11-06 15:11:20
Meadow Creek, SC, USAREV5435.04-82.19USArrayTransportable Array2015-10-18 22:18:132015-10-29 15:34:46
East Lynn Lake, WV, USAWVQ5238.05-82.32USArrayTransportable Array2015-10-17 19:00:002015-11-05 15:53:01
Fort Valley Farm, GA, USAGAZ5332.51-83.88USArrayTransportable Array2015-10-17 14:36:462015-10-28 15:40:38
Laurel Branch, WV, USAWVQ5337.97-81.45USArrayTransportable Array2015-10-16 23:13:202015-11-05 20:07:22
TRIBBLE MILL, GA, USAREX5233.90-83.91USArrayTransportable Array2015-10-16 19:02:392015-10-28 19:21:36
Dennys Creek, GA, USAREY5133.39-85.24USArrayTransportable Array2015-10-11 21:18:302015-11-11 20:35:35
CLIFF PITS, SC, USASCW5434.45-82.18USArrayTransportable Array2015-10-09 16:32:042015-10-19 17:07:07
Turkey Creek, SC, USASCV5534.89-81.34USArrayTransportable Array2015-10-08 19:58:242015-11-03 17:17:39
BLANTON MILL, GA, USAREY5233.23-84.40USArrayTransportable Array2015-09-30 16:15:462015-10-28 12:55:38
JOCASSEE GORGES, SC, USASCV5335.07-82.82USArrayTransportable Array2015-09-24 21:13:442015-10-15 15:08:31
Red Bird, KY, USAKYS5137.00-83.67USArrayTransportable Array2015-09-23 20:39:422015-10-15 04:33:30
Pumpkin Hill Creek, FL, USAFLC5730.47-81.50USArrayTransportable Array2015-09-21 16:21:392015-11-01 17:58:09
Sumter Forest, SC, USASCW5534.36-81.57USArrayTransportable Array2015-09-18 17:58:212015-10-17 21:00:07
Lake Mayers, GA, USAGAA5531.79-82.50USArrayTransportable Array2015-09-16 16:50:212015-09-28 16:37:40
WHEATLEY FOREST, GA, USAGAA5331.90-83.95USArrayTransportable Array2015-09-15 22:16:352015-09-27 20:20:23
Providence Canyon, GA, USAGAA5232.06-84.91USArrayTransportable Array2015-09-13 21:11:102015-10-11 15:06:19
Gator Slide, GA, USAGAA5431.89-83.28USArrayTransportable Array2015-09-11 17:45:442015-09-28 14:05:14
Parker Ranch, GA, USAGAZ5432.59-83.15USArrayTransportable Array2015-09-09 20:06:562015-09-20 17:37:29
Tugaloo State Park, GA, USAGAW5334.50-83.07USArrayTransportable Array2015-09-08 15:07:372015-09-18 22:15:40
Chickasawhatchee, GA, USAGAB5331.45-84.43USArrayTransportable Array2015-09-03 21:26:172015-09-22 19:38:45
Reed Bringham Park, GA, USAGAB5431.19-83.53USArrayTransportable Array2015-09-03 15:46:282015-09-12 20:02:59
Upper Aucilla River, FL, USAFLC5430.52-83.74USArrayTransportable Array2015-09-02 22:17:152015-09-12 17:21:57
Holton Creek, FL, USAFLC5530.44-83.03USArrayTransportable Array2015-09-02 16:58:042015-09-29 19:06:08
Bethea Forest, FL, USAFLC5630.48-82.27USArrayTransportable Array2015-09-01 16:43:102015-09-21 21:35:23
Heads Creek, GA, USAGAY5233.29-84.36USArrayTransportable Array2015-08-28 18:38:232015-09-05 15:37:44
Griffin Ridge, GA, USAGAA5631.68-81.84USArrayTransportable Array2015-08-27 14:45:002015-08-31 18:50:49
South Dry Creek, GA, USAGAZ5232.60-84.59USArrayTransportable Array2015-08-25 16:35:172015-09-04 15:04:47
Cook Island, GA, USAGAZ5632.26-81.57USArrayTransportable Array2015-08-24 21:43:382015-09-20 20:52:44
Satilla River, GA, USAGAB5631.09-81.92USArrayTransportable Array2015-08-24 16:14:062015-08-31 21:24:54
Di-Lane Plantation, GA, USAGAY5532.96-82.10USArrayTransportable Array2015-08-21 21:04:532015-08-30 14:53:37
Choopee Dunes, GA, USAGAZ5532.49-82.42USArrayTransportable Array2015-08-21 16:38:022015-09-09 15:43:49
Hamburg State Park, GA, USAGAY5433.21-82.78USArrayTransportable Array2015-08-20 17:12:432015-08-29 19:05:42
Fishing Creek, GA, USAGAX5433.79-82.61USArrayTransportable Array2015-08-19 18:41:312015-08-29 16:27:56
Red Creek, GA, USAGAY5133.33-85.25USArrayTransportable Array2015-08-15 14:11:382015-09-04 20:10:01
Chambers County, AL, USAALZ5132.80-85.36USArrayTransportable Array2015-08-14 20:22:362015-09-04 18:23:17
Oconee Forest, GA, USAGAY5333.21-83.55USArrayTransportable Array2015-08-12 17:00:042015-08-28 22:39:41
Scull Shoals Forest, GA, USAGAX5333.78-83.27USArrayTransportable Array2015-08-10 22:42:242015-09-08 18:19:31
Cane Creek, KY, USARES5037.03-84.28USArrayTransportable Array2015-07-29 18:05:262015-08-18 13:44:06
Kingdom Come, KY, USAKYS5237.00-82.99USArrayTransportable Array2015-07-28 16:19:482015-08-17 19:52:53
Coker Creek, TN, USATNV5135.26-84.40USArrayTransportable Array2015-07-25 23:21:422015-08-16 18:17:48
Flat Rock Branch, TN, USATNV4935.37-85.79USArrayTransportable Array2015-07-25 16:06:552015-08-15 18:20:46
Talladega Creek, AL, USAALY5033.40-85.88USArrayTransportable Array2015-07-23 19:49:582015-08-13 15:47:26
Rock Quarry Mountain, AL, USAALX5033.98-85.50USArrayTransportable Array2015-07-23 00:34:452015-08-13 13:43:58
Paulding Forest, GA, USAGAX5134.01-84.94USArrayTransportable Array2015-07-22 17:47:002015-08-13 20:10:53
Scott Forest, TN, USARET5036.47-84.71USArrayTransportable Array2015-07-18 20:17:082015-08-18 16:42:06
Limestone Cove, TN, USATNT5336.17-82.30USArrayTransportable Array2015-07-17 22:59:062015-08-17 13:15:46
Cherokee Lake, TN, USATNT5236.27-83.17USArrayTransportable Array2015-07-17 14:42:502015-08-17 15:43:42
Pigeon River, TN, USATNU5235.81-83.25USArrayTransportable Array2015-07-16 15:20:402015-08-07 21:57:50
Logan Hill, TN, USATNU5135.81-84.05USArrayTransportable Array2015-07-15 14:46:232015-08-16 20:35:25
Stone Mountain, GA, USAGAX5233.82-84.16USArrayTransportable Array2015-07-14 14:14:042015-08-12 14:30:54
Murphy Hill, TN, USATNV5035.29-85.06USArrayTransportable Array2015-07-13 16:07:352015-08-26 19:59:37
Rich Mountain, GA, USAGAW5134.62-84.45USArrayTransportable Array2015-07-01 23:58:302015-07-14 21:05:30
Santo Domingo Pueblo, NM, USACSDMT0335.56-106.40SAGESanto Domingo Pueblo2015-07-01 00:00:002015-07-01 00:00:00
Santo Domingo Pueblo, NM, USACSDMT0435.57-106.42SAGESanto Domingo Pueblo2015-07-01 00:00:002015-07-01 00:00:00
Sisters Mountain, GA, USAGAW5234.59-83.94USArrayTransportable Array2015-06-30 19:50:582015-07-24 15:38:32
Santo Domingo Pueblo, NM, USACSDMT0235.55-106.39SAGESanto Domingo Pueblo2015-06-29 00:00:002015-06-29 00:00:00
Santo Domingo Pueblo, NM, USACSDMT0135.54-106.39SAGESanto Domingo Pueblo2015-06-29 00:00:002015-06-29 00:00:00
Santo Domingo Pueblo, NM, USACSDMT0635.59-106.44SAGESanto Domingo Pueblo2015-06-27 00:00:002015-06-27 00:00:00
Santo Domingo Pueblo, NM, USACSDMT0535.58-106.43SAGESanto Domingo Pueblo2015-06-27 00:00:002015-06-27 00:00:00
Laurel Hill, TN, USATNV4735.40-87.49USArrayTransportable Array2015-06-19 16:05:252015-07-08 23:56:30
Browns Ferry, AL, USAALW4834.68-87.02USArrayTransportable Array2015-06-18 15:00:362015-07-09 13:45:10
Opossum Creek, TN, USATNV4835.50-86.67USArrayTransportable Array2015-06-13 18:44:342015-07-06 03:15:11
Fort Campbell, KY, USARET4636.69-87.79USArrayTransportable Array2015-06-11 22:44:112015-07-19 17:30:53
Charleston Park,, IN, USAREQ4838.39-85.64USArrayTransportable Array2015-06-10 17:17:332015-07-05 23:52:14
ppPage: 1 of 13pp