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.

Download request too large

Requested download count exceeds maximum size (200) for this product.

EM Transfer Function Product Query icon
Your session is about to expire!

Your session will expire in seconds.

Do you wish to continue?

EM Transfer Function Query Parameters
Data Quality
NA
1
2
3
4
5
Data Quality Warning
NA
0
1
Release Status
Unrestricted Release
Project
USArray
Lithoprobe
YSRP
UofA
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
  • Lithoprobe
  • YSRP
  • UofA
  • All
  • Alberta Basement
  • Southern Alberta Array 2010
  • Transportable Array
  • Yellowstone-Snake River Plain
  • Red Deer Conductor Array 2008
  • Alberta Array 2010
  • Alberta Array 2008
  • Backbone/Permanent Array
  • Southern Alberta Array 2009
  • British Columbia Array 2009
  • All
  • Unrestricted Release

Query Results: 1045 items found
ppPage: 1 of 11pp
Site NameSite IDLatitudeLongitudeProjectSurveyStart Time (UTC)End Time (UTC)
Wildcat Creek, IN, USAINN4640.42-86.38USArrayTransportable Array2013-11-09 18:09:002013-11-16 15:08:20
Kankakee Marsh, IN, USAREL4541.27-86.79USArrayTransportable Array2013-11-08 20:01:222013-11-15 19:03:56
Yellow Creek, IN, USAINL4641.55-85.95USArrayTransportable Array2013-11-07 20:03:492013-11-15 16:30:07
Pigeon Creek, IN, USAINL4741.65-85.19USArrayTransportable Array2013-11-07 16:04:462013-11-15 14:19:58
Coon Den Hollow, MO, USAMOS4137.63-91.68USArrayTransportable Array2013-11-05 20:25:542013-11-18 16:49:55
Long Branch Creek, MO, USAMOQ3838.92-93.85USArrayTransportable Array2013-11-03 20:22:302013-11-18 21:41:48
Apple Creek, IL, USAILP4239.45-90.28USArrayTransportable Array2013-11-02 21:13:232013-11-11 15:08:46
Little Brush Creek, MO, USAMOS4237.59-90.97USArrayTransportable Array2013-11-01 22:05:292013-11-13 15:58:02
Wayne Hollow, MO, USARER3938.16-93.13USArrayTransportable Array2013-10-25 18:36:312013-11-04 16:06:16
McCloud Park, IN, USAREO4639.83-86.68USArrayTransportable Array2013-10-22 17:11:382013-10-29 16:18:53
Stump Creek, MO, USAMOQ4038.83-92.17USArrayTransportable Array2013-10-21 17:21:072013-10-30 18:24:59
Walker Hollow, MO, USAMOS4037.60-92.40USArrayTransportable Array2013-10-20 17:54:152013-11-05 15:23:23
Bourbeuse River, MO, USAMOR4138.14-91.59USArrayTransportable Array2013-10-19 16:58:202013-11-12 19:36:00
Two Rivers, IL, USAILQ4238.93-90.51USArrayTransportable Array2013-10-17 21:37:312013-11-11 17:35:58
Mud Creek, IN, USAINM4641.00-86.26USArrayTransportable Array2013-10-12 18:02:502013-10-24 17:10:40
Sangamon Creek, IL, USAILP4339.43-89.30USArrayTransportable Array2013-10-11 15:05:292013-11-01 14:36:46
North Fork, IL, USAREO4340.01-89.16USArrayTransportable Array2013-10-09 16:49:022013-10-29 20:30:04
Tiffin River, OH, USAOHL4841.45-84.40USArrayTransportable Array2013-10-09 15:55:062013-10-21 16:41:36
Petobego, MI, USATTG4544.85-85.44USArrayTransportable Array2013-10-04 16:05:442013-10-20 18:45:01
Kaskaskla River, IL, USAILO4439.99-88.39USArrayTransportable Array2013-10-02 21:23:402013-10-17 20:16:54
Hidden Springs, IL, USAILP4439.32-88.68USArrayTransportable Array2013-10-02 16:24:162013-10-17 18:02:27
Weinberg-King Park, IL, USAILO4140.24-90.90USArrayTransportable Array2013-09-30 20:46:472013-10-17 15:00:59
Sugar Creek, IL, USAILQ4338.72-89.61USArrayTransportable Array2013-09-21 16:09:192013-10-22 21:58:06
Panther Creek, IL, USAILO4239.99-90.07USArrayTransportable Array2013-09-20 16:58:472013-10-16 20:00:50
North Fork, IL, USAILO4340.01-89.16USArrayTransportable Array2013-09-19 16:57:262013-09-29 20:32:06
Forest Glen, IL, USAILO4540.01-87.58USArrayTransportable Array2013-09-18 20:01:442013-10-16 15:14:51
Little Auglaize River, OH, USAOHM4840.80-84.46USArrayTransportable Array2013-09-17 16:13:232013-10-16 20:22:53
Bull Creek, IN, USAINM4740.95-85.42USArrayTransportable Array2013-09-16 15:14:162013-09-28 18:59:52
McCloud Park, IN, USAINO4639.84-86.68USArrayTransportable Array2013-09-10 17:29:562013-10-07 13:39:43
Rock Rapids, MI, USAREE4546.10-84.99USArrayTransportable Array2013-09-05 14:03:402013-10-04 20:10:44
Dowling Creek, MI, USAMIH4544.19-85.65USArrayTransportable Array2013-09-04 15:30:262013-09-23 19:31:42
Round Lake, MI, USAREG4544.81-85.29USArrayTransportable Array2013-08-30 17:29:212013-09-23 17:16:07
Holly Park, MI, USAMIJ4842.83-83.53USArrayTransportable Array2013-08-29 15:50:152013-09-24 15:14:49
Two Creeks, MI, USAMIK4842.13-84.03USArrayTransportable Array2013-08-28 16:29:142013-09-02 17:33:27
North Lake, MI, USAMIK4642.34-85.81USArrayTransportable Array2013-08-28 15:28:202013-09-09 13:12:42
Kalamazoo River, MI, USAMIK4742.17-84.80USArrayTransportable Array2013-08-27 15:18:192013-09-22 17:19:45
Hoffmaster State Park, MI, USAMIJ4543.14-86.28USArrayTransportable Array2013-08-25 17:37:322013-09-14 15:45:35
Saginaw Bay, MI, USAMIH4844.00-83.07USArrayTransportable Array2013-08-23 16:30:332013-08-31 16:01:33
Beaver Island, MI, USAMIF4445.60-85.60USArrayTransportable Array2013-08-22 17:21:472013-08-30 16:14:26
Wolcott Mill, MI, USAREJ4942.74-82.91USArrayTransportable Array2013-08-20 18:22:422013-08-26 15:13:13
Pony Creek, MI, USAMII4643.58-85.04USArrayTransportable Array2013-08-20 17:45:162013-08-26 19:03:32
Jackpine Plains, MI, USAREG4644.86-84.48USArrayTransportable Array2013-08-19 18:01:582013-08-23 19:04:08
Nelson Run, MI, USAMII4743.45-84.18USArrayTransportable Array2013-08-19 15:39:222013-09-08 13:41:16
Herron Creek, MI, USAMII4943.44-82.58USArrayTransportable Array2013-08-18 16:59:182013-08-31 13:37:24
Hiawatha Forest, MI, USAMIE4546.06-85.00USArrayTransportable Array2013-08-16 19:18:322013-08-29 18:27:26
Lake Superior Forest, MI, USAMIE4645.97-84.02USArrayTransportable Array2013-08-16 14:15:352013-09-05 18:43:22
Ocqueoc Creek, MI, USAMIF4645.45-84.14USArrayTransportable Array2013-08-15 21:42:492013-08-21 19:09:46
Wolcott Mill, MI, USAMIJ4942.77-82.94USArrayTransportable Array2013-08-15 18:06:522013-08-20 14:14:55
Black Lake Forest, MI, USAMIF4745.33-83.62USArrayTransportable Array2013-08-15 15:53:492013-08-21 17:17:27
Mackinaw Forest, MI, USAMIF4545.54-85.03USArrayTransportable Array2013-08-14 16:52:192013-08-21 18:16:00
Round Lake, MI, USAMIG4544.83-85.29USArrayTransportable Array2013-08-13 17:49:222013-08-27 15:18:59
Jackpines Plains, MI, USAMIG4644.84-84.47USArrayTransportable Array2013-08-07 16:05:332013-08-19 14:15:10
Roscommon Forest, MI, USAMIH4644.19-84.82USArrayTransportable Array2013-08-05 20:42:002013-08-17 19:24:58
Tyler Plains, MI, USAMIH4744.08-83.89USArrayTransportable Array2013-08-05 15:05:072013-08-17 16:18:34
Deford SGA, MI, USAMII4843.52-83.28USArrayTransportable Array2013-08-03 15:11:022013-08-10 18:31:14
Egypt Creek, MI, USAMIJ4643.03-85.48USArrayTransportable Array2013-08-02 15:56:312013-08-10 13:48:45
Rose Lake, MI, USAMIJ4742.82-84.40USArrayTransportable Array2013-08-01 19:08:452013-08-09 19:34:26
Pointe Mouillee, MI, USAMIK4942.02-83.22USArrayTransportable Array2013-07-31 20:48:302013-08-09 16:14:31
White River, MI, USAMII4543.56-85.88USArrayTransportable Array2013-07-25 20:04:202013-08-12 14:54:32
McGills Creek, MI, USAMIG4744.60-83.58USArrayTransportable Array2013-07-22 14:49:212013-08-17 17:56:23
Whitefish Bay, MI, USAMID4546.48-84.69USArrayTransportable Array2013-07-20 15:27:102013-08-14 17:05:18
Pomme de Terre River, MO, USAMOS3937.73-93.42USArrayTransportable Array2013-07-13 18:54:022013-07-29 16:29:54
Wayne Hollow, MO, USAMOR3938.16-93.14USArrayTransportable Array2013-07-12 18:26:582013-07-28 20:07:56
Hicklin Creek, MO, USAMOS3837.67-94.10USArrayTransportable Array2013-07-08 17:40:442013-07-28 16:42:40
Thomas Hill, MO, USAMOP3939.53-92.68USArrayTransportable Array2013-07-08 17:22:422013-07-18 19:02:05
Thousand Hills, MO, USAMOR4238.09-90.68USArrayTransportable Array2013-07-04 17:35:042013-07-27 19:07:51
Sugar Creek, MO, USAMOP4139.48-91.19USArrayTransportable Array2013-07-04 17:24:042013-07-11 14:02:24
Newberry Creek, MO, USAMOR3838.23-94.09USArrayTransportable Array2013-07-02 17:56:592013-07-10 13:23:51
Blackwater, MO, USAMOQ3938.98-92.93USArrayTransportable Array2013-07-01 16:22:502013-07-24 18:35:17
Lake of the Ozarks, MO, USAMOR4038.11-92.58USArrayTransportable Array2013-06-28 18:54:552013-07-30 13:50:29
Bunch Hollow, MO, USAMOP3839.59-93.63USArrayTransportable Array2013-06-28 17:54:342013-07-09 14:06:23
Honey Creek, MO, USAMOO3840.19-93.48USArrayTransportable Array2013-06-27 22:12:332013-07-08 21:10:10
Bear Creek, MO, USAMOQ4138.92-91.38USArrayTransportable Array2013-06-27 21:37:052013-07-24 14:39:37
Fabius River, MO, USAMOO4040.15-91.83USArrayTransportable Array2013-06-26 21:22:332013-07-07 15:39:16
Squaw Creek, MO, USAMOO3640.24-95.23USArrayTransportable Array2013-06-25 18:15:382013-07-21 18:36:02
Silver Island, MN, USAREC3847.71-91.18USArrayTransportable Array2013-06-24 21:54:022013-07-15 15:09:07
Isle Royale, MI, USAMIC4047.91-89.15USArrayTransportable Array2013-06-18 19:07:582013-07-17 15:59:18
Thousand Hills, MO, USAMOO3940.16-92.66USArrayTransportable Array2013-06-03 16:24:512013-06-26 15:07:26
Middle Fork Grand River, MO, USAMOO3740.25-94.38USArrayTransportable Array2013-06-02 18:07:382013-07-12 19:37:53
Saline Creek, KS, USAREQ3338.94-97.85USArrayTransportable Array2013-06-01 19:02:312013-06-21 17:05:18
Smithville Lake, MO, USAMOP3739.53-94.49USArrayTransportable Array2013-05-28 18:22:162013-06-24 19:58:22
Big Sugar Creek, KS, USAKSR3738.24-94.85USArrayTransportable Array2013-05-25 18:45:432013-07-02 19:08:26
Cow Creek, KS, USAKSR3338.22-98.05USArrayTransportable Array2013-05-23 17:10:482013-05-29 22:55:03
Little Mill Creek, KS, USAKSQ3739.00-94.80USArrayTransportable Array2013-05-23 16:51:302013-06-13 14:25:18
Chapman Creek, KS, USAKSQ3439.09-97.22USArrayTransportable Array2013-05-22 19:38:282013-06-22 14:15:48
Walnut River, KS, USAKSS3537.72-96.71USArrayTransportable Array2013-05-18 19:19:312013-07-02 14:13:31
Mark Twain Lake, MO, USAMOP4039.52-91.84USArrayTransportable Array2013-05-16 20:31:472013-06-27 15:32:32
Konza Prairie, KS, USAKSQ3539.10-96.59USArrayTransportable Array2013-05-16 19:26:062013-05-31 22:24:32
Clear Creek, KS, USAKSP3639.64-95.45USArrayTransportable Array2013-05-15 21:57:082013-07-03 15:03:55
Fancy Creek, KS, USAKSP3439.55-97.05USArrayTransportable Array2013-05-14 16:53:372013-06-20 18:46:26
Woodridge Park, KS, USAKSQ3638.94-95.44USArrayTransportable Array2013-05-10 20:12:152013-06-12 21:12:24
Cottonwood Creek, KS, USAKSR3438.35-97.27USArrayTransportable Array2013-05-10 17:54:222013-05-21 16:08:13
Hickory Creek, KS, USAKSR3638.27-95.78USArrayTransportable Array2013-05-09 18:41:002013-05-22 16:03:14
Cross Timbers, KS, USAKSS3637.74-95.92USArrayTransportable Array2013-05-09 18:12:372013-05-20 18:42:27
Afton Lake, KS, USAKSS3437.61-97.62USArrayTransportable Array2013-05-08 16:55:012013-05-20 14:11:32
Table Rock, KS, USAKSQ3338.96-97.92USArrayTransportable Array2013-05-07 18:37:242013-06-01 14:44:19
Chase Lake, KS, USAKSR3538.37-96.59USArrayTransportable Array2013-05-01 17:54:092013-06-03 17:21:47
Bourbon Lake, KS, USAKSS3737.78-95.07USArrayTransportable Array2013-04-30 20:17:372013-06-10 20:22:25
Skunk Creek, KS, USAKSP3339.65-97.89USArrayTransportable Array2013-04-30 19:28:102013-07-10 14:48:09
Gilson Creek, KS, USAKSP3539.61-96.25USArrayTransportable Array2013-04-29 19:13:332013-05-13 15:22:11
ppPage: 1 of 11pp