B024 kuntza024bor2006 Latitude 45.6378 Longitude -123.8558 Elevation 37.7 m Install Date 2006-02-22 Contents Of Tar files for year YYYY File Contents B024.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B024.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B024.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B024.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B024.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B024.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B024.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B024.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B024.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B024.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 = 321.7 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 -10.080 13.916 -0.00045 0.00175 0.000 0.00000 CH1 -12.310 16.117 -0.00028 0.00053 0.000 0.00000 CH2 -14.850 29.195 -0.00060 0.00007 0.000 0.00000 CH3 3.040 0.000 0.00000 -0.00242 0.000 0.00000 Detrend reference date /detrend_ref Barometric Response Gauge Response(ns/millibar) CH0 -4.1 CH1 -4.4 CH2 -9.5 CH3 -6.3 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 70.270 16.081 CH0 O1 -133.299 6.611 CH0 P1 -132.718 2.902 CH0 K1 -128.796 7.673 CH0 N2 67.917 3.546 CH0 S2 86.077 6.879 CH1 M2 14.094 33.886 CH1 O1 -60.543 11.358 CH1 P1 -86.874 4.679 CH1 K1 -88.160 15.345 CH1 N2 55.754 7.098 CH1 S2 -43.568 10.081 CH2 M2 -152.319 42.149 CH2 O1 102.752 14.690 CH2 P1 89.064 6.708 CH2 K1 86.976 20.776 CH2 N2 -126.399 9.605 CH2 S2 -176.430 9.680 CH3 M2 -169.580 30.588 CH3 O1 122.095 10.878 CH3 P1 99.962 4.729 CH3 K1 93.309 14.733 CH3 N2 -125.084 6.257 CH3 S2 132.399 10.252 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 = 321.7 ISOTROPIC 0.29629630 0.51851852 0.29629630 0.22222222 ISOTROPIC 0.03897465 0.35493429 -0.18094836 -0.21296057 ISOTROPIC -0.39002063 0.10581051 0.34769643 -0.06348630 Hodgkinson et al. (2013) Tidal Calibration KH2013 -7.099 -0.699 -7.967 7.008 KH2013 2.407 0.587 2.41 -2.74 KH2013 -0.964 -0.119 -0.7 0.786 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