B004 HokoFalls Latitude 48.201925 Longitude -124.427006 Elevation 30 m Install Date 2005-06-15 Contents Of Tar files for year YYYY File Contents B004.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B004.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B004.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B004.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B004.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B004.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B004.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B004.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B004.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B004.YYYY.xml.2Ene.ER2010.txt.gz Processed engineering shear strain, Roeloffs [2010], calibration Description of Level 2 Borehole Strainmeter ASCII files. Column 1 Description of data, gauge0, gauge1 etc Column 2 Date, YYYY-MM-DDTHH:mm:ss Column 3 Day of year Column 4 Modified Julian Date Column 5 Strain (microstrain). No offsets, trends, tides or barometric corrections have been applied. Column 6 Running sum of offsets Column 7 Strain data quality flag (g=good, b=bad, m=missing) Column 8 Tidal correction (microstrain) Column 9 Borehole trend correction (microstrain) Column 10 Barometric pressure correction (microstrain) Column 11 Barometric pressure data quality flag (g=good, b=bad, m=missing, i=interpolated) Column 12 Level, quality (2a= rapid processing, 2b=post processed) Column 13 Version, data generation date Column 14 Barometeric pressure (millibars) To produce strain data with offsets, tides, trends, tides and barometric pressure effect removed use Final_Strain=Column5+Column6-Column8-Column9-Column10 Processing Information Manufacturer: GTSM Technologies Manufacturer Gauge Scale Factor: 0.1 nanostrain per digital count Manufacturer Areal Scale Factor: 1.5 Manufacturer Shear Scale Factor: 3.0 Manufacturer Gauge Weightings: CH0=1, CH1=1, CH2=1, CH3=1 CH0 Orientation recorded in field = 168.2 degrees east of north Borehole Trend Models, calculated in days, y=F+A1*exp(T1*t)+M*t+A2*exp(T2*t) Gauge F A1 T1 M A2 T2 CH0 -65.070 4.116 0.00045 -0.02085 47.362 -0.00211 CH1 -27.190 13.308 0.00012 -0.00366 7.977 -0.00199 CH2 53.830 -39.791 -0.00090 0.00566 -14.400 -0.00546 CH3 -2.230 -3.721 -0.00091 -0.00051 7.517 -0.01812 Detrend reference date 2005-06-16T00:00:00 Barometric Response Gauge Response(ns/millibar) CH0 -4.2 CH1 -3.6 CH2 -4.6 CH3 -4.1 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 114.965 9.590 CH0 O1 51.489 7.710 CH0 P1 43.463 4.187 CH0 K1 42.692 12.906 CH0 N2 178.388 0.920 CH0 S2 70.206 6.813 CH1 M2 31.859 10.946 CH1 O1 -14.699 9.428 CH1 P1 -15.690 4.363 CH1 K1 -17.453 12.281 CH1 N2 47.634 2.924 CH1 S2 28.375 2.173 CH2 M2 -65.473 11.923 CH2 O1 -154.994 8.118 CH2 P1 -165.729 4.963 CH2 K1 -162.291 14.725 CH2 N2 -55.174 1.548 CH2 S2 -84.378 6.220 CH3 M2 -152.129 5.307 CH3 O1 152.245 5.482 CH3 P1 148.332 2.995 CH3 K1 150.065 7.447 CH3 N2 -127.800 1.704 CH3 S2 78.244 0.243 Strain Matrices To Compute Areal and Shear Strain from Gauge Strain Manufacturer's Isotropic Strain Matrix, C=1.5, D=3.0, Gauge Weights=1, Orientation = 168.2 ISOTROPIC 0.29670000 0.51850000 0.29580000 0.22220000 ISOTROPIC -0.28870000 0.29830000 0.16880000 -0.17840000 ISOTROPIC -0.26600000 -0.21960000 0.35310000 0.13250000 Roeloffs 2010 Tidal Calibration Calculated CH0 orientation = 162.8 degrees east of north ER2010 1.65662916 2.37718929 2.36230912 0.39952254 ER2010 -0.04469343 0.51274012 0.50047667 -0.09672701 ER2010 0.39438025 1.05488877 1.64758286 0.22625875 Reference: Roeloffs, E. (2010), Tidal calibration of Plate Boundary Observatory borehole strainmeters: Roles of vertical and shear coupling, J. Geophys. Res., 115, B06405, doi:10.1029/2009JB006407. Hodgkinson et al. (2013) Tidal Calibration KH2013 1.248 2.219 2.022 0.068 KH2013 -0.236 0.452 0.36 -0.209 KH2013 0.04 0.912 1.421 0.015 Reference: Table 2. Hodgkinson, K., J. Langbein, B. Henderson, D. Mencin, and A. Borsa (2013), Tidal calibration of plate boundary observatory borehole strainmeters, J. Geophys. Res. Solid Earth, 118, 447–458, doi:10.1029/2012JB009651. Wed Dec 27 11:27:32 UTC-06:00 2023