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
CostaRica
EMSOC
EPOS-PL
Ethiopia
FU-BERLIN
GeoscienceAustralia
INTERMAGNET
Lithoprobe
MAGIC
MOCHA
NRCAN-GSC
PRIDE
SAGE
SAMTEX
UCL
UofAdelaide
UofAlberta
USArray
USGS-CGGSC
USGS-GEOMAG
USMTArray
UW
YSRP
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
  • CostaRica
  • EMSOC
  • EPOS-PL
  • Ethiopia
  • FU-BERLIN
  • GeoscienceAustralia
  • INTERMAGNET
  • Lithoprobe
  • MAGIC
  • MOCHA
  • NRCAN-GSC
  • PRIDE
  • SAGE
  • SAMTEX
  • UCL
  • UofAdelaide
  • UofAlberta
  • USArray
  • USGS-CGGSC
  • USGS-GEOMAG
  • USMTArray
  • UW
  • YSRP
  • All
  • 2005
  • 2005-SFR
  • 2008
  • 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-NASA
  • 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
  • MOCHA-land
  • 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
  • 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: 6215 items found
ppPage: 1 of 63pp
Site NameSite IDLatitudeLongitudeProjectSurveyStart Time (UTC)End Time (UTC)Last modified (UTC)
Nations Draw, NM, USANMX2034.47-108.71USMTArrayCONUS South2020-09-20 19:03:062020-10-07 20:28:002021-03-17 14:47:44
Fry Canyon, UT, USAUTS1837.67-110.16USMTArrayCONUS South2020-09-20 16:41:202020-10-14 17:50:522021-03-17 14:48:43
Nelson Wash, NM, USANMW2035.27-108.74USMTArrayCONUS South2020-09-19 20:47:502020-10-21 04:46:352021-03-17 14:46:27
Montezuma Creek, UT, USAUTT1937.27-109.36USMTArrayCONUS South2020-09-19 18:02:212020-11-04 18:55:142021-03-17 14:47:14
El Puertecito, NM, USANMW2135.36-107.80USMTArrayCONUS South2020-09-18 20:26:032020-10-03 17:48:162021-03-17 14:46:21
Field of Dreams, CO, USACOS2037.71-108.47USMTArrayCONUS South2020-09-18 16:04:122020-09-29 15:12:082021-03-17 14:47:07
Cimarron Park, CO, USACOR2138.36-107.51USMTArrayCONUS South2020-09-17 18:37:002020-10-15 20:54:022021-03-17 14:47:51
Beaver Dam Flat, NV, USARES1337.52-114.16USMTArrayCONUS South2020-09-17 16:27:452020-09-29 17:20:452021-03-17 14:46:15
Burnt Station, NV, USARER1238.16-114.98USMTArrayCONUS South2020-09-16 21:24:102020-09-29 20:49:082021-03-17 14:47:35
San Augustin, NM, USANMY2133.97-107.90USMTArrayCONUS South2020-09-16 20:44:202020-09-30 22:20:052021-03-17 14:46:43
Gypsy Park, CO, USACOR2038.38-108.55USMTArrayCONUS South2020-09-16 20:13:052020-09-29 20:09:242021-03-17 14:46:33
Dean Man Wash, NV, USARET1236.79-114.80USMTArrayCONUS South2020-09-16 18:16:542020-10-10 17:26:572021-03-17 14:48:21
Chicken Creek, UT, USAUTR1938.42-109.19USMTArrayCONUS South2020-09-14 21:17:132020-11-04 22:22:152021-03-17 14:48:00
Verdure Creek, UT, USAUTS1937.79-109.29USMTArrayCONUS South2020-09-14 01:36:462020-10-17 21:42:322021-03-17 14:48:12
Long Spur, CO, USACOT2037.28-108.59USMTArrayCONUS South2020-09-13 18:08:342020-10-09 20:30:052021-03-17 14:46:55
Manzano Peak, NM, USANMX2334.57-106.32USMTArrayCONUS South2020-09-12 21:10:162020-09-26 13:40:262021-03-17 14:47:26
Hoot Owl Canyon, NM, USANMY2333.96-106.43USMTArrayCONUS South2020-09-10 19:14:232020-11-30 16:37:372021-03-17 14:48:30
El Dorado Valley, NV, USANVV1235.65-114.89USMTArrayCONUS South2020-09-05 00:03:362020-10-03 17:02:462021-03-17 14:44:16
Paradise Valley, NV, USANVU1336.32-114.15USMTArrayCONUS South2020-09-03 23:31:232020-10-02 20:35:152021-03-17 14:43:05
Box Springs, CO, USACOS2737.83-102.98USMTArrayCONUS South2020-09-03 22:09:032020-10-10 06:10:222021-03-17 14:43:42
Devil's Backbone, NM, USANMY2233.83-107.28USMTArrayCONUS South2020-08-30 20:37:062020-10-06 22:22:532021-03-17 14:44:35
Elephant Butte, NM, USANMZ2233.36-107.26USMTArrayCONUS South2020-08-29 22:47:202020-09-30 19:56:202021-03-17 14:43:30
Monias Draw, NM, USANMX2534.62-104.78USMTArrayCONUS South2020-08-25 21:46:122020-10-04 23:13:062021-03-17 14:42:44
Pine Mountain, NM, USANMX2434.45-105.60USMTArrayCONUS South2020-08-23 17:10:532020-09-29 20:57:322021-03-17 14:43:54
Shoenail Ranch, NM, USANMX2734.58-103.37USMTArrayCONUS South2020-08-21 21:50:542020-10-04 19:24:122021-03-17 14:42:53
High Plains, KS, USAKSR2838.37-102.04USMTArrayCONUS South2020-08-13 20:38:322020-09-01 19:16:442021-03-17 22:23:49
Freeman Mountain, NM, USANMY2033.96-108.79USMTArrayCONUS South2020-08-09 22:03:152020-09-13 22:25:232021-03-17 22:29:17
Yellow Mountain, NM, USANMX2234.44-107.20USMTArrayCONUS South2020-08-09 19:59:422020-09-08 16:45:182021-03-17 22:28:56
Black Range, NM, USANMZ2133.34-108.05USMTArrayCONUS South2020-08-08 21:38:132020-09-14 22:46:282021-03-17 22:29:59
Herrera Mesa, NM, USANMW2235.22-107.12USMTArrayCONUS South2020-08-08 19:50:112020-09-17 22:27:182021-03-17 22:27:54
Carpenter Canyon, NV, USANVU1136.17-115.83USMTArrayCONUS South2020-08-02 19:03:082020-10-05 17:19:082021-03-17 14:43:14
Cerro Roman, NM, USANMV2336.01-106.15USMTArrayCONUS South2020-08-01 20:46:112020-09-07 19:58:002021-03-17 22:26:50
Joshua Hollow, NV, USARET1036.93-116.57USMTArrayCONUS South2020-08-01 18:07:482020-08-29 16:17:042021-03-17 22:31:01
Franklin Mountains, NM, USANMB2332.08-106.51USMTArrayCONUS South2020-07-31 20:19:112020-09-26 18:26:412021-03-17 22:26:10
Grapevine Mountains, NV, USARET0937.05-117.24USMTArrayCONUS South2020-07-31 20:05:582020-08-30 17:12:322021-03-17 22:30:40
Redhouse Mountain, NM, USANMA2232.75-107.15USMTArrayCONUS South2020-07-30 20:34:232020-09-25 20:54:202021-03-17 22:24:50
Ute Canyon, CO, USACOT2537.28-104.65USMTArrayCONUS South2020-07-29 22:43:142020-08-20 01:40:262021-03-17 22:23:29
Alkali Lake, CO, USCOR2738.40-102.66USMTArrayCONUS South2020-07-28 01:28:002020-09-11 18:06:382021-03-17 22:22:09
San Pedros Mountains, NM, USANMW2335.21-106.17USMTArrayCONUS South2020-07-27 20:08:492020-08-17 14:53:212021-03-17 22:28:15
Black Draw, CO, USACOR2638.40-103.57USMTArrayCONUS South2020-07-27 19:44:232020-09-11 15:35:082021-03-17 22:21:50
Canadian River, NM, USANMW2735.30-103.23USMTArrayCONUS South2020-07-26 19:10:482020-09-04 13:55:302021-03-17 22:28:35
Amistad, NM, USANMV2735.92-103.17USMTArrayCONUS South2020-07-25 23:13:382020-08-31 04:58:072021-03-17 22:27:32
West Potrillo Mountains, NM, USANMB2232.09-107.30USMTArrayCONUS South2020-07-25 21:34:462020-09-25 16:34:012021-03-17 22:25:51
Halfway Wash, NV, USANVT1336.80-114.23USMTArrayCONUS South2020-07-25 20:19:412020-10-02 17:24:592021-03-17 14:44:26
Sheep Mountain, NM, USANMB2132.09-108.10USMTArrayCONUS South2020-07-24 20:22:012020-09-24 23:29:432021-03-17 22:25:30
Deus Lake, CO, USCOS2537.78-104.67USMTArrayCONUS South2020-07-24 20:15:232020-08-14 19:52:082021-03-17 22:22:49
Government Wash, NV, USANVU1236.16-114.85USMTArrayCONUS South2020-07-24 16:54:592020-10-04 17:21:422021-03-17 14:44:04
Lightning Dock Mountain, NM, USANMB2032.13-108.80USMTArrayCONUS South2020-07-23 22:15:342020-08-14 18:55:492021-03-17 22:25:11
Mimbres River, NM, USANMA2132.55-107.94USMTArrayCONUS South2020-07-22 20:45:332020-09-22 16:42:212021-03-17 22:24:30
David Hill, NM, USANMV2635.78-103.86USMTArrayCONUS South2020-07-22 20:35:022020-09-09 00:55:092021-03-17 22:27:09
Lordsburg Mesa, NM, USANMA2032.60-108.77USMTArrayCONUS South2020-07-21 19:45:432020-08-28 16:14:472021-03-17 22:24:09
North May Creek, CO, USACOS2437.75-105.40USMTArrayCONUS South2020-07-21 19:10:292020-08-12 20:11:242021-03-17 22:22:29
Moon Ranch, NM, USANMZ2033.16-108.75USMTArrayCONUS South2020-07-20 22:46:342020-08-12 14:57:382021-03-17 22:29:37
Dean Man Wash, NV, USANVT1236.79-114.80USMTArrayCONUS South2020-07-19 15:21:462020-08-26 19:52:472021-03-17 22:30:20
Shale Hills, CO, USACOS2637.73-103.62USMTArrayCONUS South2020-07-19 01:49:242020-08-15 20:24:582021-03-17 22:23:09
Pueblo Springs, CO, USACOR2538.35-104.39USMTArrayCONUS South2020-07-18 01:09:022020-08-10 15:40:312021-03-17 22:21:30
San Miguel Mountain, NM, USANMV2235.88-106.94USMTArrayCONUS South2020-07-17 18:28:082020-08-17 22:46:572021-03-17 22:26:30
Turkey Mountain, NM, USANMV2535.88-104.72USMTArrayCONUS South2020-07-15 19:51:222020-08-19 21:37:342021-03-17 22:15:28
Phantom Canyon, CO, USACOR2438.49-105.12USMTArrayCONUS South2020-07-14 21:58:452020-08-04 15:48:592021-03-17 22:12:28
Sugarpine Hill, CA, USARET0736.95-118.97USMTArrayCONUS South2020-07-13 22:39:142020-08-05 16:03:422021-03-17 22:18:11
Barbero Canyon, NM, USANMW2435.30-105.64USMTArrayCONUS South2020-07-13 20:47:312020-08-03 15:48:042021-03-17 22:15:48
Candelaria Hills, NV, USARER0838.23-118.24USMTArrayCONUS South2020-07-12 19:50:052020-08-31 17:39:252021-03-17 22:17:28
Dog Creek, CA, USARET0636.85-119.61USMTArrayCONUS South2020-07-11 23:58:242020-08-04 22:32:072021-03-17 22:17:49
Cedar Canyon, CA, USACAW0735.07-118.63USMTArrayCONUS South2020-07-09 23:01:152020-08-06 18:50:412021-03-17 22:11:28
South Creek, UT, USAUTR1538.18-112.57USMTArrayCONUS South2020-07-09 21:10:562020-07-29 21:48:452021-03-17 22:18:53
Shauntie Hills, UT, USAUTR1438.27-113.39USMTArrayCONUS South2020-07-06 23:31:552020-07-29 17:41:002021-03-17 22:18:33
Harmony Mountains, UT, USAUTS1437.56-113.30USMTArrayCONUS South2020-07-05 23:19:412020-07-28 16:38:252021-03-17 22:19:14
Whiskey Spring, NV, USANVR1338.32-114.12USMTArrayCONUS South2020-07-04 19:50:142020-07-27 14:56:522021-03-17 22:16:27
Beaver Dam Flat, NV, USANVS1337.52-114.16USMTArrayCONUS South2020-07-03 20:35:202020-07-26 20:50:582021-03-17 22:16:47
Lonesome Mountain, NM, USANMU2636.53-103.88USMTArrayCONUS South2020-07-02 21:17:452020-07-23 18:18:542021-03-17 22:14:49
Burnt Station, NV, USANVR1238.16-114.98USMTArrayCONUS South2020-07-02 19:25:252020-07-26 16:09:512021-03-17 22:16:07
Short Grass Prairie, CO, USACOT2637.09-103.70USMTArrayCONUS South2020-07-01 22:57:452020-07-21 18:31:562021-03-17 22:13:50
Cottonwood Gulch, CO, USACOR2238.42-106.75USMTArrayCONUS South2020-06-29 23:39:522020-07-30 21:09:432021-03-17 22:12:08
Mill Creek, CO, USACOT2237.26-106.96USMTArrayCONUS South2020-06-28 21:19:042020-07-19 20:04:312021-03-17 22:13:08
San Luis Valley, CO, USACOS2337.94-106.05USMTArrayCONUS South2020-06-27 18:44:062020-07-19 16:26:452021-03-17 22:12:48
Santa Ynez Mountains, CA, USACAX0534.55-120.35USMTArrayCONUS South2020-06-26 19:25:502020-07-16 17:12:002021-03-17 22:11:48
La Jara Creek, CO, USACOT2337.23-106.16USMTArrayCONUS South2020-06-26 18:14:302020-07-30 16:22:032021-03-17 22:13:29
Kiowa Mountain, NM, USANMU2336.61-106.12USMTArrayCONUS South2020-06-25 20:30:072020-07-16 22:35:582021-03-17 22:14:09
Wheeler Peak, NM, USANMU2436.60-105.38USMTArrayCONUS South2020-06-24 20:17:422020-07-14 18:03:412021-03-17 22:14:29
Ute Canyon, NM, USANMV2435.91-105.40USMTArrayCONUS South2020-06-23 21:56:012020-07-14 17:18:022021-03-17 22:15:08
Pahroc Canyon, NV, USANVS1237.64-114.98USMTArrayCONUS South2020-06-15 20:12:212020-07-14 15:26:342021-03-17 22:07:47
Pleasanton Ridge, CA, USARES0337.66-121.96USMTArrayCONUS South2020-06-14 00:09:132020-06-21 17:47:082021-03-17 22:09:10
Railroad Valley, NV, USANVR1138.28-115.67USMTArrayCONUS South2020-06-12 21:10:382020-08-06 21:25:592021-03-17 22:06:22
Yucca Mountain, NV, USANVT1036.87-116.58USMTArrayCONUS South2020-06-11 20:34:322020-07-01 16:32:462021-03-17 22:08:31
Pine Mountain, CA, USACAV0735.59-118.80USMTArrayCONUS South2020-06-09 23:21:352020-07-06 16:31:122021-03-17 22:04:08
Grapevine Mountains, NV, USANVT0937.05-117.24USMTArrayCONUS South2020-06-09 20:16:062020-07-13 17:01:422021-03-17 22:08:07
Opal Mountain, CA, USAREW0935.15-117.16USMTArrayCONUS South2020-06-08 22:57:132020-07-17 21:15:322021-03-17 22:10:10
Goldfield Hills, NV, USANVS0937.63-117.27USMTArrayCONUS South2020-06-08 19:26:352020-07-11 16:18:132021-03-17 22:07:06
Searles Valley, CA, USACAV0935.60-117.31USMTArrayCONUS South2020-06-08 01:23:562020-07-17 16:55:432021-03-17 22:04:51
Fish Lake Valley, NV, USANVS0837.69-118.02USMTArrayCONUS South2020-06-07 19:48:052020-06-28 16:30:382021-03-17 22:06:45
Cap Canyon, CA, USACAV0835.70-118.15USMTArrayCONUS South2020-06-07 19:42:492020-07-06 21:39:282021-03-17 22:04:30
Stone Cabin Valley, NV, USANVR1038.17-116.51USMTArrayCONUS South2020-06-06 20:12:572020-06-26 16:06:102021-03-17 22:06:00
Poso Creek, CA, USAREV0635.71-119.47USMTArrayCONUS South2020-06-06 18:38:282020-07-05 18:10:472021-03-17 22:09:50
Bald Mountain, NV, USANVS1137.51-115.62USMTArrayCONUS South2020-06-05 21:18:232020-06-27 20:54:382021-03-17 22:07:27
Crescent Dunes, NV, USANVR0938.30-117.44USMTArrayCONUS South2020-06-04 18:29:292020-06-25 15:35:322021-03-17 22:05:39
Mt. Pajaro, CA, USARET0337.10-121.89USMTArrayCONUS South2020-06-03 21:33:062020-07-02 17:11:302021-03-17 22:09:30
Rhodes Salt Marsh, NV, USANVR0838.33-118.08USMTArrayCONUS South2020-06-03 19:10:112020-06-24 15:55:462021-03-17 22:05:18
Corral Hollow, CA, USACAS0437.63-121.47USMTArrayCONUS South2020-06-02 18:41:432020-07-13 21:46:122021-03-17 22:03:45
Green Valley River, CA, USARER0338.27-122.15USMTArrayCONUS South2020-06-01 21:49:042020-06-30 17:27:432021-03-17 22:08:52
Mazourka Canyon, CA, USACAT0836.84-118.09USMTArrayCONUS SoCal-NASA2019-11-15 21:35:132019-12-05 16:51:022020-01-29 19:01:03
ppPage: 1 of 63pp