Reitman, J.
Rodriguez, B. D.
Brown, P. J.
20190919
Audiomagnetotelluric sounding data in the Silverton Caldera complex, Colorado, 2018; Station AMTMB03
1
ASCII and Binary Digital Data
Denver, CO
U.S. Geological Survey
Additional information about Originators:Reitman, J., http://orcid.org/0000-0003-3551-9884;Rodriguez, B.D., http://orcid.org/0000-0002-2263-611X; Brown, P.J., http://orcid.org/0000-0002-2415-7462
https://doi.org/10.5066/P9PPQTJ8
This dataset includes audiomagnetotelluric (AMT) sounding data collected in July 2018 in the Silverton Caldera complex, Colorado, in the Southern Rocky Mountain Volcanic Field, by the U.S. Geological Survey (USGS). Along with geologic mapping, airborne magnetics, airborne electromagnetics, and magnetotellurics, the USGS collected AMT data at 24 sites along four profiles ranging from 3 to 6 kilometers in length across the north-western structural margin of the Silverton caldera in Mineral Basin (MB01-MB05), across the south-eastern margin of the caldera along Cunningham Creek (CC01-CC05), within the caldera in Eureka Graben (EG01-EG05), and within the caldera along upper Cement Creek near the Gold King mine (GK01-GK09).
The purpose of this data release is to provide audiomagnetotelluric (AMT) station locations and data to the public. The purpose of the survey is to help to characterize subsurface rock properties important for understanding surface water and groundwater quality issues, and also to improve knowledge of deep geologic structures that may have been conduits for hydrothermal fluids that formed mineral deposits. The study also has general applications to mineral resource assessments in other areas of the world, and to identifying possible groundwater flow paths and associated geochemistry important in abandoned mine lands cleanup.
This data product contains MT transfer functions (TFs), which define the frequency-dependent linear relations between components of electromagnetic (EM) field variations measured at a single site. Two sorts of TF are provided for most sites. All TFs 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. Remote reference stations were not used because manmade noise sources were assumed to be minimal in this remote area. Apparent resistivities and phases, which can be computed from the off-diagonal components of the impedance tensors, are frequently used in 2-dimensional (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.
For more information on the EDI data format:
Wight, David E., 1988, MT/EMAP Data Interchange Standard, Revision 1.0: Society of Exploration Geophysicists technical standards committee report, 77 p, isbn = 9780931830617, http://www.seg.org/documents/10161/77915/seg_mt_emap_1987.pdf. This report can be downloaded for free from the Society of Exploration Geophysics (SEG) Technical Standards website, http://seg.org/Publications/SEG-Technical-Standards. These metadata document the full suite of MT data for this site and includes the files below. Their contents are described in the entity and attribute section of the metadata.
USA-Colorado-Silverton_Caldera-2018-AMTMB03.edi
BF6-9621.RSP
BF6-9624.RSP
BF6-9625.RSP
EF-9515X.RSP
EF-9515Y.RSP
readme.txt
USA-Colorado-Silverton_Caldera-2018-AMTMB03-BP_High_01.txt
USA-Colorado-Silverton_Caldera-2018-AMTMB03-FC6_01.txt
USA-Colorado-Silverton_Caldera-2018-AMTMB03-FC6_02.txt
USA-Colorado-Silverton_Caldera-2018-AMTMB03-FC7_01.txt
USA-Colorado-Silverton_Caldera-2018-AMTMB03-FC7_02.txt
USA-Colorado-Silverton_Caldera-2018-AMTMB03-FC8_01.txt
USA-Colorado-Silverton_Caldera-2018-AMTMB03-FC8_02.txt
USA-Colorado-Silverton_Caldera-2018-AMTMB03-FC9_01.txt
USA-Colorado-Silverton_Caldera-2018-AMTMB03-FC9_02.txt
USA-Colorado-Silverton_Caldera-2018-AMTMB03-SD6_01.txt
USA-Colorado-Silverton_Caldera-2018-AMTMB03-SD6_02.txt
USA-Colorado-Silverton_Caldera-2018-AMTMB03-SD7_01.txt
USA-Colorado-Silverton_Caldera-2018-AMTMB03-SD7_02.txt
USA-Colorado-Silverton_Caldera-2018-AMTMB03-SD8_01.txt
USA-Colorado-Silverton_Caldera-2018-AMTMB03-SD8_02.txt
USA-Colorado-Silverton_Caldera-2018-AMTMB03-SD9_01.txt
USA-Colorado-Silverton_Caldera-2018-AMTMB03-SD9_02.txt
USA-Colorado-Silverton_Caldera-2018-AMTMB03-TS_High_01.txt
MB03A1.SD6
MB03A1.SD7
MB03A1.SD8
MB03A1.SD9
MB03A2.SD6
MB03A2.SD7
MB03A2.SD8
MB03A2.SD9
MB03A1.FC6
MB03A1.FC7
MB03A1.FC8
MB03A1.FC9
MB03A2.FC6
MB03A2.FC7
MB03A2.FC8
MB03A2.FC9
MB03A1.TS1
MB03A1.BP1
20180720
20180720
ground condition
Not planned
-107.72280
-107.72280
37.88817
37.88817
ISO 19115 Topic Category
geoscientificInformation
economy
None
impedance
tipper
apparent resistivity
impedance phase
impedance strike
magnetotelluric
MT
audiomagnetotelluric
AMT
sounding
Geology, Geophysics, and Geochemistry Science Center
GGGSC
Mineral Resources Program
MRP
USGS Thesaurus
magnetic field (earth)
electric field (earth)
geophysics
GPS measurement
magnetotelluric surveying
USGS Metadata Identifier
USGS:5ce42d46e4b0654fe0bce49b
USGS Geographic Names Information System (GNIS), https://geonames.usgs.gov
Silverton
"San Juan" County
Common geographic areas
Colorado
Please see 'Distribution Info' for details.
Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. The USGS or the U.S. Government shall not be held liable for improper or incorrect use of the data described and/or contained herein.
U.S. Geological Survey
Brian D. Rodriguez
Research Geophysicist
Physical
Mail Stop 964, West 6th Ave. and Kipling St., DFC Bldg. 20
Denver
CO
80225-0046
US
303-236-1361
brod@usgs.gov
Data collected by Brian D. Rodriguez of the Geology, Geophysics, and Geochemistry Science Center. This project was funded by U.S. Geological Survey (USGS) Minerals Resources Program (MRP), in cooperation with the U.S. Bureau of Land Management (BLM) and U.S. Forest Service (USFS).
MS-DOS version 6.22
The data have been peer reviewed and compared with related ancillary data.
Data were reviewed for consistency and analyses results were checked for validity.
Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. All magnetotelluric stations as part of this survey were included in this data release for the region and time period specified in this metadata.
Spatial locations were determined from hand-held global positioning system (GPS) devices. In general, the GPS units used by field scientists recorded sample locations to within 100 feet (30 meters) of the true location. The locations were verified using a geographic information system (GIS) and digital topographic maps.
Elevations were determined from USGS, The National Map, Bulk Point Query Service based on the USGS 3DEP (3D elevation program) 1/3 arc-second layer (10-meter). Vertical accuracy was not assessed for this specific dataset. The overall absolute vertical accuracy of the seamless DEMs within the conterminous United States (2013), expressed as the root mean square error (RMSE) of 25,310 reference points, was 1.55 meters (USGS, 2014 - http://dx.doi.org/10.3133/ofr20141008). The vertical accuracy varies across the U.S. as a result of differences in source DEM quality, terrain relief, land cover, and other factors.
Multiple high frequency time series (TS1 file extension), Fourier Coefficient (FC6, FC7, FC8, FC9 file extension), and Synchronous Detection Mode spectra cross power blocks (SD6, SD7, SD8, and SD9 file extensions) were each recorded for about 1 minute with an Electromagnetic Instruments (EMI) MT-1 MT data acquisition instrument employing orthogonal horizontal EMI AMT induction magnetic coils and EMI Titanium electrodes, along with a vertical EMI AMT induction magnetic coil. The proprietary, DOS-based, EMI recording software used is MTACQ, version 2.00 (September 17, 2004). The collected time series were stored on a portable field-rugged laptop computer and then converted to intermediate spectra cross power files (BP1 file extension) using fast Fourier transform (FFT) techniques and least-squares, cross-spectral analysis to solve for a tensor transfer function. Remote reference stations were not used because manmade noise sources were assumed to be minimal in this remote area. The time series and spectra cross power files were downloaded from the portable laptop each evening for further processing. The time series files are readable by other third-party software, such as Geosystem's WinGLink, version 2.20.02 (June 5, 2008), but the Fourier Coefficient and cross power files are only known to be readable by the EMI proprietary software.
20180720
Combine multiple frequency band BP and SD cross power files into a single cross power file (AVG file extension) using EMI's MTACQ, version 2.00, software
20180720
Convert cross power AVG file to spectra edi file using EMI's MTACQ, version 2.00, software
20190206
Rotate data to geographic north and convert spectra edi file to a Transfer Function dump file using the proprietary, Windows-based, Geotools' GeotoolsMT, version 7.30 (May 28, 1998), software
20190205
Use EDITFMD File Conversion Utility, version 6.6 to extract survey and station information and settings from AVG, spectra edi, and dump files to create a Transfer Function edi file
20190213
Use python tool, SquamataAssemblyAMTv1-11.ipynb, accessed at https://github.com/pbrown-usgs/SquamataAssemblyAMT, to extract survey and station information from AVG, spectra edi, and Transfer Function edi file to FGDC-compliant metadata.
20190909
Point
Entity point
1
0.0196481178
0.0409100603
Decimal degrees
NAD27 CONUS
Clarke 1866
6378206.4
294.9786982
Text File USA-Colorado-Silverton_Caldera-2018-AMTMB03.edi
Transfer Function EDI File
U.S. Geological Survey
HEAD
Header file information containing survey and station collection information.
U.S. Geological Survey
Header block of information containing survey and station collection content, acquisition date, version, and software used to process.
INFO
Descriptive content, or metadata, describing the data collection.
U.S. Geological Survey
Descriptive content, or metadata, describing the data collection. including abstract, data description, instrumentation with equipment identifiers, notes, data collection and processing details including software and other contextual information.
FREQ
Data block containing a set of frequencies in hertz (Hz.) It defines the frequency set for succeeding data within that data section which are functions of frequency.
U.S. Geological Survey
23370.0
4.39400005
Hertz
ZROT
Data block containing a set of rotation angles in degrees used for impedances.
U.S. Geological Survey
0.0
0.0
Degrees
ZXXR
Real component of impedance ZXX
U.S. Geological Survey
-642.284058
769.048828
ohms
ZXXI
Imaginary component of impedance ZXX
U.S. Geological Survey
-1934.56311
838.046631
ohms
ZXX.VAR
Total variance of impedance of ZXX
U.S. Geological Survey
49.2490463
120919.516
ohms*ohms
ZXYR
Real component of impedance ZXY
U.S. Geological Survey
13.8982258
3725.50488
ohms
ZXYI
Imaginary component of impedance ZXY
U.S. Geological Survey
31.4219666
3903.16211
ohms
ZXY.VAR
Total variance of impedance of ZXY
U.S. Geological Survey
33.6093063
272781.906
ohms*ohms
ZYXR
Real component of impedance ZYX
U.S. Geological Survey
-2673.14673
1711.84753
ohms
ZYXI
Imaginary component of impedance ZYX
U.S. Geological Survey
-1831.62292
1003.91394
ohms
ZYX.VAR
Total variance of impedance of ZYX
U.S. Geological Survey
37.6550369
127801.5
ohms*ohms
ZYYR
Real component of impedance ZYY
U.S. Geological Survey
-1193.21289
1654.94873
ohms
ZYYI
Imaginary component of impedance ZYY
U.S. Geological Survey
-767.610046
920.834412
ohms
ZYY.VAR
Total variance of impedance of ZYY
U.S. Geological Survey
7.02299309
370428.688
ohms*ohms
TXR.EXP
Real part of complex tipper component TX
U.S. Geological Survey
-0.444584191
0.235208064
unitless
TXI.EXP
Imaginary part of complex tipper component TX
U.S. Geological Survey
-0.19062525
0.409683824
unitless
TXVAR.EXP
Total variance of complex tipper component TX
U.S. Geological Survey
1.23660502e-05
0.474937081
unitless
TYR.EXP
Real part of complex tipper component TY
U.S. Geological Survey
-0.458581239
0.487815619
unitless
TYI.EXP
Imaginary part of complex tipper component TY
U.S. Geological Survey
-1.00561488
0.346417844
unitless
TYVAR.EXP
Total variance of complex tipper component TY
U.S. Geological Survey
4.86946146e-06
0.611517072
unitless
RHOROT
Data block containing a set of rotation angles in degrees used for apparent resistivities.
U.S. Geological Survey
0.0
0.0
Degrees
RHOXX
Magnitude of apparent resistivity (ohm-m) computed from Zxx
U.S. Geological Survey
0.0986253619
309.303589
ohm-m
RHOXX.ERR
Log10 error bar (in decades) associated with Rhoxx
U.S. Geological Survey
0.0979181528
2.27487421
Log10 ohm-m
RHOXY
Magnitude of apparent resistivity (ohm-m) computed from Zxy
U.S. Geological Survey
6.0236187
380.82486
ohm-m
RHOXY.ERR
Log10 error bar (in decades) associated with Rhoxy
U.S. Geological Survey
0.0111053819
0.382340699
Log10 ohm-m
RHOYX
Magnitude of apparent resistivity (ohm-m) computed from Zyx
U.S. Geological Survey
13.356945
556.838501
ohm-m
RHOYX.ERR
Log10 error bar (in decades) associated with Rhoyx
U.S. Geological Survey
0.00953160878
0.290439427
Log10 ohm-m
RHOYY
Magnitude of apparent resistivity (ohm-m) computed from Zyy
U.S. Geological Survey
0.0155330589
200.780228
ohm-m
RHOYY.ERR
Log10 error bar (in decades) associated with Rhoyy
U.S. Geological Survey
0.0214149654
5.45619631
Log10 ohm-m
PHSXX
Phase angle of apparent resistivity (deg) computed from Zxx
U.S. Geological Survey
-172.222656
172.586792
Degrees
PHSXX.ERR
Error bar (in degrees) associated with Phsxx
U.S. Geological Survey
6.45929289
150.064911
Degrees
PHSXY
Phase angle of apparent resistivity (deg) computed from Zxy
U.S. Geological Survey
25.0990448
77.37957
Degrees
PHSXY.ERR
Error bar (in degrees) associated with Phsxy
U.S. Geological Survey
0.732580364
25.2215805
Degrees
PHSYX
Phase angle of apparent resistivity (deg) computed from Zyx
U.S. Geological Survey
-176.12941
164.158356
Degrees
PHSYX.ERR
Error bar (in degrees) associated with Phsyx
U.S. Geological Survey
0.628764391
19.1591988
Degrees
PHSYY
Phase angle of apparent resistivity (deg) computed from Zyy
U.S. Geological Survey
-177.670242
171.959305
Degrees
PHSYY.ERR
Error bar (in degrees) associated with Phsyy
U.S. Geological Survey
1.41266489
359.924774
Degrees
TIPMAG
Magnitude of total tipper
U.S. Geological Survey
0.126304448
1.25094438
Unitless
TIPMAG.ERR
Error bar associated with TIPMAG
U.S. Geological Survey
1.00000003e+32
1.00000003e+32
Unitless
TIPPHS
Phase angle (deg) of total tipper
U.S. Geological Survey
-106.354179
175.312012
Degrees
TIPPHS.ERR
Error bar (in degrees) associated with TIPPHS
U.S. Geological Survey
1.00000003e+32
1.00000003e+32
Degrees
ZSTRIKE
Impedance strike angle (deg) computed from the impedance tensor Z
U.S. Geological Survey
-21.9776268
47.4436302
Degrees
ZSKEW
Impedance skew computed from the impedance tensor Z
U.S. Geological Survey
0.0213132706
0.495614856
Unitless
TSTRIKE
Tipper strike angle (deg) computed from the tipper tensor T
U.S. Geological Survey
-29.1198444
134.493668
Degrees
COH MEAS1=1011.001 MEAS2=1015.001
Ordinary coherency between any two measurements as a function of freq.
U.S. Geological Survey
0.258135051
0.953962982
Unitless
COH MEAS1=1012.001 MEAS2=1014.001
Ordinary coherency between any two measurements as a function of freq.
U.S. Geological Survey
0.160957932
0.993014693
Unitless
COH MEAS1=1011.001 MEAS2=1014.001
Ordinary coherency between any two measurements as a function of freq.
U.S. Geological Survey
0.0669118837
0.676107883
Unitless
COH MEAS1=1012.001 MEAS2=1015.001
Ordinary coherency between any two measurements as a function of freq.
U.S. Geological Survey
0.0201366134
0.713617623
Unitless
EPREDCOH MEAS1=1011.001 MEAS2=1012.001 EPRED= 1014.001
Multiple coherency relationship between an E measurement, and a predicted E measurement derived from two H measurements and a tensor impedance Z.
U.S. Geological Survey
0.336160362
0.993310332
Unitless
EPREDCOH MEAS1=1011.001 MEAS2=1012.001 EPRED= 1015.001
Multiple coherency relationship between an E measurement, and a predicted E measurement derived from two H measurements and a tensor impedance Z.
U.S. Geological Survey
0.294452608
0.995334864
Unitless
SIGAMP MEAS=1011
Signal amplitude (or power) spectra for a measurement as a function of frequency.
U.S. Geological Survey
0.000238676977
0.00818716642
gammas/SQRT(Hertz)
SIGAMP MEAS=1012
Signal amplitude (or power) spectra for a measurement as a function of frequency.
U.S. Geological Survey
0.000126051978
0.0119939568
gammas/SQRT(Hertz)
SIGAMP MEAS=1013
Signal amplitude (or power) spectra for a measurement as a function of frequency.
U.S. Geological Survey
0.000146703445
0.00429192279
gammas/SQRT(Hertz)
SIGAMP MEAS=1014
Signal amplitude (or power) spectra for a measurement as a function of frequency.
U.S. Geological Survey
0.124533124
4.79139853
mV/Km/SQRT(Hertz)
SIGAMP MEAS=1015
Signal amplitude (or power) spectra for a measurement as a function of frequency.
U.S. Geological Survey
0.194959223
3.19785881
mV/Km/SQRT(Hertz)
SIGNOISE MEAS=1011.001
Signal-to-noise ratio for a measurement as a function of frequency.
U.S. Geological Survey
0.999999881
1.00000012
Unitless
SIGNOISE MEAS=1012.001
Signal-to-noise ratio for a measurement as a function of frequency.
U.S. Geological Survey
0.999999881
1.00000012
Unitless
SIGNOISE MEAS=1013.001
Signal-to-noise ratio for a measurement as a function of frequency.
U.S. Geological Survey
0.0262429602
0.984113157
Unitless
SIGNOISE MEAS=1014.001
Signal-to-noise ratio for a measurement as a function of frequency.
U.S. Geological Survey
0.113003798
0.986665428
Unitless
SIGNOISE MEAS=1015.001
Signal-to-noise ratio for a measurement as a function of frequency.
U.S. Geological Survey
0.0867023543
0.990691543
Unitless
Text File BF6-9621.RSP
System Calibration File
Electromagnetic Instruments (EMI)
Freq
Frequency - Hz
U.S. Geological Survey
0.1
25000.0
Hz
Amp
Amplitude - Volts/Gamma
U.S. Geological Survey
0.0019100000000000002
0.16940999999999998
Volts/Gamma
Phz
Phase - Degrees
U.S. Geological Survey
-19.6
89.3
Degrees
Text File BF6-9624.RSP
System Calibration File
Electromagnetic Instruments (EMI)
Freq
Frequency - Hz
U.S. Geological Survey
0.1
25000.0
Hz
Amp
Amplitude - Volts/Gamma
U.S. Geological Survey
0.00183
0.17196
Volts/Gamma
Phz
Phase - Degrees
U.S. Geological Survey
-20.2
89.3
Degrees
Text File BF6-9625.RSP
System Calibration File
Electromagnetic Instruments (EMI)
Freq
Frequency - Hz
U.S. Geological Survey
0.1
25000.0
Hz
Amp
Amplitude - Volts/Gamma
U.S. Geological Survey
0.00185
0.1749
Volts/Gamma
Phz
Phase - Degrees
U.S. Geological Survey
-22.3
89.3
Degrees
Text File EF-9515X.RSP
System Calibration File
Electromagnetic Instruments (EMI)
Freq
Frequency - Hz
U.S. Geological Survey
0.0001
25000.0
Hz
Amp
Amplitude - Volts
U.S. Geological Survey
0.05
4.0
Volts
Phz
Phase - Degrees
U.S. Geological Survey
-.3
Low F
Degrees
Text File EF-9515Y.RSP
System Calibration File
Electromagnetic Instruments (EMI)
Freq
Frequency - Hz
U.S. Geological Survey
0.0001
25000.0
Hz
Amp
Amplitude - Volts
U.S. Geological Survey
0.05
4.0
Volts
Phz
Phase - Degrees
U.S. Geological Survey
-.3
Low F
Degrees
Text File, USA-Colorado-Silverton_Caldera-2018-AMTMB03-BP_High_01.txt is a header file in ASCII text format for raw cross power files.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File. USA-Colorado-Silverton_Caldera-2018-AMTMB03-FC6_01.txt is a header file in ASCII text format for binary Fourier coefficient files.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File. USA-Colorado-Silverton_Caldera-2018-AMTMB03-FC6_02.txt is a header file in ASCII text format for binary Fourier coefficient files.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File. USA-Colorado-Silverton_Caldera-2018-AMTMB03-FC7_01.txt is a header file in ASCII text format for binary Fourier coefficient files.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File. USA-Colorado-Silverton_Caldera-2018-AMTMB03-FC7_02.txt is a header file in ASCII text format for binary Fourier coefficient files.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File. USA-Colorado-Silverton_Caldera-2018-AMTMB03-FC8_01.txt is a header file in ASCII text format for binary Fourier coefficient files.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File. USA-Colorado-Silverton_Caldera-2018-AMTMB03-FC8_02.txt is a header file in ASCII text format for binary Fourier coefficient files.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File. USA-Colorado-Silverton_Caldera-2018-AMTMB03-FC9_01.txt is a header file in ASCII text format for binary Fourier coefficient files.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File. USA-Colorado-Silverton_Caldera-2018-AMTMB03-FC9_02.txt is a header file in ASCII text format for binary Fourier coefficient files.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File, USA-Colorado-Silverton_Caldera-2018-AMTMB03-SD6_01.txt is a header file in ASCII text format for sychronous detection cross power files.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File, USA-Colorado-Silverton_Caldera-2018-AMTMB03-SD6_02.txt is a header file in ASCII text format for sychronous detection cross power files.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File, USA-Colorado-Silverton_Caldera-2018-AMTMB03-SD7_01.txt is a header file in ASCII text format for sychronous detection cross power files.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File, USA-Colorado-Silverton_Caldera-2018-AMTMB03-SD7_02.txt is a header file in ASCII text format for sychronous detection cross power files.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File, USA-Colorado-Silverton_Caldera-2018-AMTMB03-SD8_01.txt is a header file in ASCII text format for sychronous detection cross power files.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File, USA-Colorado-Silverton_Caldera-2018-AMTMB03-SD8_02.txt is a header file in ASCII text format for sychronous detection cross power files.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File, USA-Colorado-Silverton_Caldera-2018-AMTMB03-SD9_01.txt is a header file in ASCII text format for sychronous detection cross power files.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File, USA-Colorado-Silverton_Caldera-2018-AMTMB03-SD9_02.txt is a header file in ASCII text format for sychronous detection cross power files.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File, USA-Colorado-Silverton_Caldera-2018-AMTMB03-TS_High_01.txt is a header file in ASCII text format for binary time series files.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File, readme.txt, is a Read Me file describing the naming format of the EDI files and that they may need to be renamed to be imported into certain software packages.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Binary File, MB03A1.FC6 is a raw Fourier Coefficient Binary Data File. The header information for this file contains field notes including survey identifier, personnel, date/time, weather, indication of a remote MT site, additional comments and sensor configuration for the electric and magnetic field channels.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Binary File, MB03A1.FC7 is a raw Fourier Coefficient Binary Data File. The header information for this file contains field notes including survey identifier, personnel, date/time, weather, indication of a remote MT site, additional comments and sensor configuration for the electric and magnetic field channels.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Binary File, MB03A1.FC8 is a raw Fourier Coefficient Binary Data File. The header information for this file contains field notes including survey identifier, personnel, date/time, weather, indication of a remote MT site, additional comments and sensor configuration for the electric and magnetic field channels.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Binary File, MB03A1.FC9 is a raw Fourier Coefficient Binary Data File. The header information for this file contains field notes including survey identifier, personnel, date/time, weather, indication of a remote MT site, additional comments and sensor configuration for the electric and magnetic field channels.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Binary File, MB03A2.FC6 is a raw Fourier Coefficient Binary Data File. The header information for this file contains field notes including survey identifier, personnel, date/time, weather, indication of a remote MT site, additional comments and sensor configuration for the electric and magnetic field channels.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Binary File, MB03A2.FC7 is a raw Fourier Coefficient Binary Data File. The header information for this file contains field notes including survey identifier, personnel, date/time, weather, indication of a remote MT site, additional comments and sensor configuration for the electric and magnetic field channels.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Binary File, MB03A2.FC8 is a raw Fourier Coefficient Binary Data File. The header information for this file contains field notes including survey identifier, personnel, date/time, weather, indication of a remote MT site, additional comments and sensor configuration for the electric and magnetic field channels.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Binary File, MB03A2.FC9 is a raw Fourier Coefficient Binary Data File. The header information for this file contains field notes including survey identifier, personnel, date/time, weather, indication of a remote MT site, additional comments and sensor configuration for the electric and magnetic field channels.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Binary File, MB03A1.TS1 is a raw Time Series Binary Data File. The header information for this file contains field notes including survey identifier, personnel, date/time, weather, indication of a remote MT site, additional comments and sensor configuration for the electric and magnetic field channels.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File, MB03A1.BP1 is a raw Cross Power Data File. The header information for this file contains field notes including survey identifier, personnel, date/time, weather, indication of a remote MT site, additional comments and sensor configuration for the electric and magnetic field channels.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File, MB03A1.SD6 is a raw Cross Power Data File. The header information for this file contains field notes including survey identifier, personnel, date/time, weather, indication of a remote MT site, additional comments and sensor configuration for the electric and magnetic field channels.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File, MB03A1.SD7 is a raw Cross Power Data File. The header information for this file contains field notes including survey identifier, personnel, date/time, weather, indication of a remote MT site, additional comments and sensor configuration for the electric and magnetic field channels.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File, MB03A1.SD8 is a raw Cross Power Data File. The header information for this file contains field notes including survey identifier, personnel, date/time, weather, indication of a remote MT site, additional comments and sensor configuration for the electric and magnetic field channels.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File, MB03A1.SD9 is a raw Cross Power Data File. The header information for this file contains field notes including survey identifier, personnel, date/time, weather, indication of a remote MT site, additional comments and sensor configuration for the electric and magnetic field channels.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File, MB03A2.SD6 is a raw Cross Power Data File. The header information for this file contains field notes including survey identifier, personnel, date/time, weather, indication of a remote MT site, additional comments and sensor configuration for the electric and magnetic field channels.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File, MB03A2.SD7 is a raw Cross Power Data File. The header information for this file contains field notes including survey identifier, personnel, date/time, weather, indication of a remote MT site, additional comments and sensor configuration for the electric and magnetic field channels.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File, MB03A2.SD8 is a raw Cross Power Data File. The header information for this file contains field notes including survey identifier, personnel, date/time, weather, indication of a remote MT site, additional comments and sensor configuration for the electric and magnetic field channels.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
Text File, MB03A2.SD9 is a raw Cross Power Data File. The header information for this file contains field notes including survey identifier, personnel, date/time, weather, indication of a remote MT site, additional comments and sensor configuration for the electric and magnetic field channels.
https://www.sciencebase.gov/catalog/item/5ce42d46e4b0654fe0bce49b
MT/EMAP Data Interchange Standard, Revision 1.0, Dec 1987, David E. Wight. This standard was never published in Geophysics.
For more information on the EDI data format: Wight, D.E., 1988, MT/EMAP Data Interchange Standard, Technical standards committee report, Society of Exploration Geophysicists, isbn=9780931830617, http://www.seg.org/documents/10161/77915/seg_mt_emap_1987.pdf
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