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
Academic Use Only
Conditions Apply
Paper Citation Required
Unrestricted Release
Project
Argentina
CAFE-MT
EMSOC
EPOS-PL
Ethiopia
FU-BERLIN
GeoscienceAustralia
INTERMAGNET
Lithoprobe
MAGIC
MOCHA
NRCAN-GSC
PRIDE
SAGE
SAMTEX
UCL
UofAdelaide
UofAlberta
USArray
USGS-CGGSC
USGS-GEOMAG
USGS-GGGSC
USMTArray
UW
YSRP
YuzawaSGR
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
  • All
  • Argentina
  • CAFE-MT
  • EMSOC
  • EPOS-PL
  • Ethiopia
  • FU-BERLIN
  • GeoscienceAustralia
  • INTERMAGNET
  • Lithoprobe
  • MAGIC
  • MOCHA
  • NRCAN-GSC
  • PRIDE
  • SAGE
  • SAMTEX
  • UCL
  • UofAdelaide
  • UofAlberta
  • USArray
  • USGS-CGGSC
  • USGS-GEOMAG
  • USGS-GGGSC
  • USMTArray
  • UW
  • YSRP
  • YuzawaSGR
  • All
  • 2005
  • 2005-SFR
  • 2010
  • 2011-2013 BBMT profile
  • 2014
  • Abitibi 1990
  • Abitibi 1991
  • Abitibi-Grenville 1993
  • Alberta Array 2008
  • Alberta Array 2010
  • Alberta Basement
  • Aluto-Langano Geothermal
  • Backbone/Permanent Array
  • Beresford/Warburton complex 2011
  • Beresford/Warburton complex 2012
  • British Columbia Array 2009
  • CAFE-MT Long Period
  • Capricorn Orogen
  • Chile MT
  • CONUS SoCal
  • CONUS South
  • Costa Rica
  • Curnamona
  • Damara Mobile Belt
  • DFG BR1351/2-3
  • DFG BR1351/3-1
  • DFG BR1351/9-1
  • Florida 2015 Long Period
  • Florida 2015 Wideband
  • Freeling Springs 2012
  • Gawler
  • Gawler-Officer-Musgrave-Amadeus
  • Georgina-Arunta
  • JMA
  • Kaapvaal 2003
  • Kaapvaal 2004
  • Kaapvaal 2005
  • Kang to Ghazi
  • Kansas 2017 Long Period
  • Kapuskasing Structural Zone
  • KBN 2P04D02527
  • KBN 3P04D01823
  • KBN 9T12B02515
  • KBN PB0854/S6/94/06, KBN 6P04D01220, KBN 6P04D03512
  • Kimberley 2003
  • Kimberley 2004
  • Kyrgyzstan-China MANAS
  • Lithoprobe East
  • MAGIC
  • MAK 2006
  • MIWIMN
  • MOARTNILKY
  • MOCHA-land
  • Naruko
  • NCN 2011/01/B/ST10/07046
  • NE Namibia 2006
  • Nepabunna 2010
  • Nicaragua
  • N N307 0249633
  • N N307 097437
  • NOD
  • North Chile Central Altiplano
  • North Queensland
  • Okavango
  • Ontario 1992
  • Paralana
  • Payun
  • Pontiac 1990
  • Purcell Overthrust, Belt Basin
  • Red Deer Conductor Array 2008
  • San Andreas Fault
  • Santo Domingo Pueblo
  • Sanzugawa
  • Sierra Nevada
  • Sierras de Cordoba
  • SN
  • SNORCLE
  • South Chile
  • Southern Alberta Array 2009
  • Southern Alberta Array 2010
  • Southern Cordillera
  • Southern Cordillera 1983
  • Southern Cordillera 1984
  • Southern Cordillera 1986
  • Southern Cordillera 1990
  • Southern Delamerian 2010-2012
  • Stage IV
  • statutory IG PAS 2004
  • Tian Shan 1999
  • Trans-Hudson Orogen
  • Trans-Hudson Orogen Transect
  • Transportable Array
  • Unknown
  • Wabma Kadarbu 2011
  • Warburton Spring 2012
  • Western Superior Transect
  • Windhoek
  • WITS 2004
  • WITS 2005
  • Yellowstone-Snake River Plain
  • YilgarnCraton-OfficerBasin-Musgrave
  • Youanmi
  • ZAM
  • Zimbabwe 2005
Type
  • Data and Metadata
  • Metadata Only
  • All
  • All
  • Academic Use Only
  • Conditions Apply
  • Paper Citation Required
  • Unrestricted Release

This database is documented by Kelbert et al (2018).
The EMTF XML format and file conversion utilities are described by Kelbert (2019). Reading and writing of EMTF XML is supported by EMTF FCU.
All data are oriented to geographic coordinates, but all historical files are also available in their original orientations. Please see the complete change log for database changes.
Data citations are provided for each survey; these should be referenced in publications.
Query Results: 6761 items found
ppPage: 1 of 68pp
Site NameSite IDLatitudeLongitudeProjectSurveyStart Time (UTC)End Time (UTC)Last modified (UTC)
Choctawhatchee River, FL, USAFLC5130.89-85.89USMTArrayCONUS South2021-12-10 21:40:182021-12-29 17:20:462022-08-22 15:46:04
Econfina, FL, USAFLD5230.35-85.58USMTArrayCONUS South2021-12-09 19:55:282021-12-30 19:31:442022-08-22 15:44:18
Chipola River, FL, USAFLC5230.86-85.26USMTArrayCONUS South2021-12-07 22:04:042021-12-21 21:49:412022-08-22 15:48:17
Buck Creek, OK, USAOKX3734.53-95.71USMTArrayCONUS South2021-12-06 19:58:512021-12-14 17:59:212022-08-22 15:46:32
Lincoln Plains, KS, USAKSS3237.78-98.83USMTArrayCONUS South2021-12-03 23:08:452021-12-12 06:26:242022-08-22 15:46:59
Ingalls Plains, KS, USAKSS3037.77-100.53USMTArrayCONUS South2021-11-22 18:42:332021-12-04 18:37:362022-08-22 15:48:02
Little Sandy Creek, OK, USAOKT3336.98-98.26USMTArrayCONUS South2021-11-18 21:37:482021-12-08 18:50:382022-08-22 15:48:41
Bluff Creek, OK, USAOKT3436.96-97.53USMTArrayCONUS South2021-11-17 22:55:242021-11-29 21:10:062022-08-22 15:45:49
Tyas Bend, OK, USAOKY3533.91-97.40USMTArrayCONUS South2021-11-13 20:05:202021-11-24 17:16:392022-08-22 15:44:10
Salt Fork Arkansas River, KS, USAKST3237.04-98.87USMTArrayCONUS South2021-11-11 21:22:482021-12-03 19:25:112022-08-22 15:45:11
Turbine Town, OK, USAREU3036.56-100.71USMTArrayCONUS South2021-11-10 23:04:062021-11-19 17:26:112022-08-22 15:44:06
Russell Springs, KS, USAKSQ2938.94-101.08USMTArrayCONUS South2021-11-10 22:29:232021-11-21 20:11:432022-08-22 15:48:23
Big Creek, KS, USAKSQ3039.03-100.31USMTArrayCONUS South2021-11-09 22:45:262021-12-09 17:39:532022-08-22 15:48:32
Redoubt Creek, OK, USAOKT3136.99-99.80USMTArrayCONUS South2021-11-09 20:34:212021-12-03 16:18:482022-08-22 15:45:38
Cimarron River, OK, USAOKV3435.86-97.69USMTArrayCONUS South2021-11-05 22:11:122021-11-29 21:14:122022-08-22 15:46:23
Russell Mountain, OK, USAOKW3835.04-94.80USMTArrayCONUS South2021-11-05 21:02:072021-12-08 19:35:072022-08-22 15:47:14
Lake Altus Lutgert, OK, USAOKW3235.02-99.32USMTArrayCONUS South2021-11-03 20:21:342021-11-15 16:39:532022-08-22 15:48:26
Old Maids Fork, KS, USAKSR3138.36-99.49USMTArrayCONUS South2021-11-03 20:03:362021-11-11 21:34:132022-08-22 15:45:23
Spring Creek, KS, USAKSR3038.35-100.33USMTArrayCONUS South2021-11-01 20:35:212021-11-11 19:28:122022-08-22 15:47:05
Ozark Plateau, OK, USAOKV3835.71-94.54USMTArrayCONUS South2021-11-01 18:26:402021-12-07 19:18:392022-08-22 15:47:38
Buffalo Creek, KS, USAKST3637.18-95.96USMTArrayCONUS South2021-10-30 19:05:422021-11-07 17:10:382022-08-22 15:47:32
Euchee Creek, OK, USAOKV3635.85-96.15USMTArrayCONUS South2021-10-29 20:40:042021-11-06 15:59:102022-08-22 15:46:53
Grandpappy Point, Texas, USATXY3633.82-96.64USMTArrayCONUS South2021-10-29 19:56:152021-11-10 19:30:402022-08-22 15:45:30
Wild Horse Lake, TX, USAOKT2936.98-101.46USMTArrayCONUS South2021-10-28 23:06:462021-11-08 19:08:442022-08-22 15:47:50
Fort Gibson Lake, OK, USAOKV3735.88-95.29USMTArrayCONUS South2021-10-28 17:57:042021-12-02 06:13:282022-08-22 15:44:30
Twenty Five Mile Creek, OK, USAOKU3136.44-99.81USMTArrayCONUS South2021-10-27 22:06:472021-11-04 16:17:452022-08-22 15:45:04
Quartermaster Creek, OK, USAOKV3235.73-99.39USMTArrayCONUS South2021-10-24 21:29:342021-11-07 18:37:462022-08-22 15:46:14
Kaw River, KS, USAKST3537.02-96.94USMTArrayCONUS South2021-10-24 20:35:082021-11-02 22:37:482022-08-22 15:45:57
Cross Bar Offroad Ranch, OK, USAOKX3534.44-97.21USMTArrayCONUS South2021-10-23 20:21:082021-11-23 10:38:322022-08-22 15:44:45
Black Kettle, OK, USAOKV3135.78-99.88USMTArrayCONUS South2021-10-22 23:18:462021-12-02 20:34:072022-08-22 15:46:38
Goose Creek, Oklahoma, USAOKX3634.55-96.48USMTArrayCONUS South2021-10-22 20:45:212021-11-09 18:05:472022-08-22 15:48:08
Cheyenne Bottoms, KS, USAKSR3238.48-98.71USMTArrayCONUS South2021-10-19 21:49:222021-11-08 17:38:482022-08-22 15:38:57
Butte Creek, CO, USARES2837.87-102.15USMTArrayCONUS South2021-10-13 20:56:142021-10-22 17:43:502022-08-22 15:38:03
Stover Creek, Texas, USATXZ3633.30-96.72USMTArrayCONUS South2021-10-13 17:39:272021-11-06 19:04:472022-08-22 15:39:45
Ed Ray Canyon, TX, USAREC2631.42-104.58USMTArrayCONUS South2021-10-11 23:51:182021-10-20 17:53:512022-08-22 15:38:42
Horse Creek, OK, USAOKX3334.53-98.74USMTArrayCONUS South2021-10-08 20:38:512021-10-18 16:57:592022-08-22 15:38:36
Herron Playa, KS, USAKSS3137.79-99.77USMTArrayCONUS South2021-10-07 20:38:302021-10-20 19:15:172022-08-22 15:39:30
Coon Creek, KS, USAKSS3337.66-98.30USMTArrayCONUS South2021-10-06 22:17:362021-10-20 16:30:142022-08-22 15:38:24
Palo Dura Creek, TX, USATXW2835.11-102.50USMTArrayCONUS South2021-10-02 20:14:402021-10-16 18:51:592022-08-22 15:39:12
Devils River, TX, USAREF3129.74-100.92USMTArrayCONUS South2021-10-01 19:49:242021-10-13 19:50:512022-08-22 15:39:06
Lake Mead, Kansas, USAKST3037.17-100.47USMTArrayCONUS South2021-10-01 19:15:182021-10-08 17:16:092022-08-22 15:38:18
Arkansas River, Kansas, USAKSS2937.84-101.43USMTArrayCONUS South2021-09-30 18:37:062021-10-11 19:48:312022-08-22 15:37:01
Julia Lake, TX, USATXY2934.00-101.75USMTArrayCONUS South2021-09-29 19:32:242021-10-09 18:22:282022-08-22 15:39:39
Butte Creek, CO, USACOS2837.87-102.15USMTArrayCONUS South2021-09-26 19:28:562021-10-12 19:00:202022-08-22 15:38:48
Sulphur Draw, TX, USATXZ2833.34-102.71USMTArrayCONUS South2021-09-26 00:16:022021-10-17 16:07:312022-08-22 15:39:18
Rush Creek, TX, USATXW2935.07-101.60USMTArrayCONUS South2021-09-25 00:02:202021-10-15 18:10:082022-08-22 15:39:48
Fort Cobb Lake, OK, USAOKW3335.24-98.55USMTArrayCONUS South2021-09-23 21:21:092021-10-12 19:54:492022-08-22 15:37:16
Prairie Dog Town Fork Red River, TX, USATXX3134.58-100.12USMTArrayCONUS South2021-09-22 18:42:472021-10-25 18:32:232022-08-22 15:37:25
North Wichita River, TX, USATXY3133.88-100.23USMTArrayCONUS South2021-09-21 20:33:152021-10-07 23:36:352022-08-22 15:37:36
Dusty Draw, TX, USAREE2930.29-102.29USMTArrayCONUS South2021-09-16 19:52:472021-09-29 15:05:232022-08-22 15:38:30
Texas County, OK, USAOKU2936.57-101.52USMTArrayCONUS South2021-09-15 19:49:102021-09-27 15:08:582022-08-22 15:08:46
Cedar Hills, TX, USATXA3632.61-97.00USMTArrayCONUS South2021-09-15 19:31:382021-09-25 20:34:462022-08-22 15:10:34
Mount Gainor, TX, USATXE3530.15-98.14USMTArrayCONUS South2021-09-12 19:43:562021-10-04 17:16:192022-08-22 15:37:07
Weaver Creek, OK, USAOKV3335.82-98.53USMTArrayCONUS South2021-09-11 00:05:212021-09-24 16:34:302022-08-22 15:09:45
New Home, TX, USAREZ2933.40-101.90USMTArrayCONUS South2021-09-10 22:48:572021-09-28 17:19:512022-08-22 15:09:17
Devil's River, TX, USATXF3129.70-100.97USMTArrayCONUS South2021-09-04 01:58:562021-09-30 16:23:002022-08-22 15:38:09
Granger Draw, TX, USARED3130.87-100.86USMTArrayCONUS South2021-09-01 21:26:442021-09-14 16:17:412022-08-22 15:09:55
Canadian River, TX, USATXV2935.77-101.21USMTArrayCONUS South2021-09-01 18:14:142021-09-14 16:10:512022-08-22 15:10:04
Howard Draw, TX, USARED3030.76-101.49USMTArrayCONUS South2021-08-31 20:56:032021-09-14 19:15:402022-08-22 15:10:13
San Angelo State Park, TX, USAREC3131.53-100.54USMTArrayCONUS South2021-08-31 18:02:582021-09-11 16:39:552022-08-22 15:09:11
Carter Draw, TX, USATXZ3133.24-100.45USMTArrayCONUS South2021-08-27 18:03:522021-09-08 21:16:242022-08-22 15:09:27
Buck Creek, TX, USATXB3232.05-99.74USMTArrayCONUS South2021-08-25 18:04:282021-09-08 16:30:282022-08-22 15:08:35
Cap Rock, TX, USATXX3034.43-101.06USMTArrayCONUS South2021-08-19 20:32:082021-09-17 17:59:182022-08-22 15:09:33
Beckham County, OK, USAOKW3135.05-99.92USMTArrayCONUS South2021-08-19 20:22:082021-09-08 19:23:332022-08-22 15:08:52
Donley County, TX, USATXW3035.05-100.85USMTArrayCONUS South2021-08-15 19:44:552021-09-13 22:20:452022-08-22 15:10:19
Bull Creek, TX, USATXZ3033.41-101.16USMTArrayCONUS South2021-08-13 21:49:452021-08-28 17:47:482022-08-22 15:10:41
Indian Creek, TX, USATXV3035.77-100.80USMTArrayCONUS South2021-08-11 01:19:102021-09-01 06:52:492022-08-22 15:09:02
North Wichita River, NM, USANMZ2333.29-106.77USMTArrayCONUS South2021-08-06 21:47:442021-09-10 19:58:412022-04-08 04:32:59
Lake Lucero, NM, USANMA2332.69-106.46USMTArrayCONUS South2021-08-04 19:00:012021-09-13 15:57:182022-04-08 04:32:37
Franklin Hollow, TX, USATXF3329.63-99.63USMTArrayCONUS South2021-07-29 20:47:202021-10-13 14:47:172022-08-22 15:37:45
Rolling Plains, TX, USATXA3132.70-100.55USMTArrayCONUS South2021-07-28 20:47:382021-08-16 16:50:442022-04-08 04:33:45
Durham Peak, TX, USATXB3131.99-100.47USMTArrayCONUS South2021-07-27 22:31:252021-08-25 17:59:402022-04-08 04:34:27
Jesse James Draw, TX, USATXY3034.00-100.97USMTArrayCONUS South2021-07-26 22:56:082021-08-16 11:36:442022-04-08 04:36:34
Devil's Creek, TX, USATXB3032.17-101.24USMTArrayCONUS South2021-07-26 20:59:402021-09-18 23:35:422022-04-08 04:34:05
Castle Gap, TX, USATXC2931.29-102.28USMTArrayCONUS South2021-07-21 21:27:172021-09-17 16:31:422022-04-08 04:34:51
Haytubbi Creek, OK, USAOKW3735.20-95.47USMTArrayCONUS South2021-07-19 21:40:022021-12-11 16:53:132022-08-22 15:47:56
Elm Creek, TX, USATXZ3333.19-99.03USMTArrayCONUS South2021-07-19 00:19:172021-08-01 18:36:242022-04-08 04:36:59
San Angelo State Park, Texas, USATXC3131.53-100.54USMTArrayCONUS South2021-07-14 20:24:542021-08-30 19:39:262022-04-08 04:35:12
Lava Canyon, TX, USATXF2729.48-103.92USMTArrayCONUS South2021-07-10 22:49:192021-08-29 20:29:372022-04-08 04:36:14
Granger Draw, TX, USATXD3130.87-100.86USMTArrayCONUS South2021-07-10 22:46:232021-08-02 19:34:372022-04-08 04:35:54
Howard Draw, TX, USATXD3030.76-101.49USMTArrayCONUS South2021-07-09 22:43:272021-07-25 16:31:102022-04-08 04:35:34
Crazy Mountain, CO, USAREN2340.95-105.89USMTArrayCONUS South2021-07-07 21:16:122021-08-01 22:10:462022-04-08 04:33:20
Shipley Field, TX, USATXC2831.36-102.84USMTArrayCONUS South2021-07-06 20:21:362021-09-05 16:39:042022-04-07 22:31:17
Smouse Mesa, NM, USAREU2136.47-107.60USMTArrayCONUS South2021-07-03 19:12:002021-08-08 17:18:142022-04-07 22:30:51
Dorsey Creek, CO, USARER2338.42-106.04USMTArrayCONUS South2021-06-30 01:15:562021-07-19 16:23:152022-04-07 22:08:12
Grand Canyon Hills, CO, USARER2438.43-105.32USMTArrayCONUS South2021-06-24 23:42:502021-07-26 17:44:032022-04-07 22:08:20
Dinnebito Wash, AZ, USAAZU1836.46-110.20USMTArrayCONUS South2021-06-24 23:33:302021-07-14 18:55:212022-04-07 22:09:37
Rito Seco, CO, USACOT2437.27-105.30USMTArrayCONUS South2021-06-23 21:43:262021-07-18 16:51:212022-04-07 22:09:40
Downie Draw, TX, USATXE2930.29-102.29USMTArrayCONUS South2021-06-23 17:34:202021-07-20 15:08:512022-04-07 22:10:17
Bear Mountain, CO, USACON2240.97-106.56USMTArrayCONUS South2021-06-19 22:09:372021-07-30 14:33:482022-04-07 22:10:27
Pinabete Arroyo, NM, USAREU2036.42-108.52USMTArrayCONUS South2021-06-19 00:33:372021-07-01 17:21:222022-04-07 22:08:28
Parika Peak, CO, USACOO2340.38-105.99USMTArrayCONUS South2021-06-17 21:03:552021-08-02 17:08:532022-04-07 22:09:17
Bull Run Creek, CO, USACON2340.96-105.82USMTArrayCONUS South2021-06-15 22:39:012021-06-27 22:00:112022-04-07 22:10:07
Peach Canyon, NM, USANMV2135.84-107.92USMTArrayCONUS South2021-06-08 20:49:022021-07-02 23:51:372022-04-07 22:09:07
Black Mountain, TX, USATXC2531.60-105.16USMTArrayCONUS South2021-06-08 20:41:252021-07-01 21:02:022022-04-07 22:08:36
Emory Draw, TX, USATXC2631.52-104.41USMTArrayCONUS South2021-06-07 17:30:002021-07-22 14:18:412022-04-07 22:08:49
Indian Springs Valley, NV, USARET1136.89-115.62USMTArrayCONUS South2021-06-06 20:31:382021-06-26 15:10:192022-04-08 23:14:47
Mc IIvain Draw, TX, USATXC2731.43-103.74USMTArrayCONUS South2021-06-06 19:51:302021-07-17 18:11:202022-04-07 22:10:50
Flat Rock Draw, TX, USATXE3030.24-101.39USMTArrayCONUS South2021-06-03 23:37:552021-06-27 19:31:312022-04-07 22:03:07
Nine Point Draw, TX, USATXF2829.59-103.16USMTArrayCONUS South2021-05-29 15:23:442021-07-31 17:10:562022-04-07 22:11:03
ppPage: 1 of 68pp