B203 quarry203bwa2007 Latitude 46.169 Longitude -122.333667 Elevation 814.4 m Install Date 2007-07-18 Contents Of Tar files for year YYYY File Contents B203.YYYY.xml.gauge0.txt.gz Processed data from gauge 0 (CH0) B203.YYYY.xml.gauge1.txt.gz Processed data from gauge 1 (CH1) B203.YYYY.xml.gauge2.txt.gz Processed data from gauge 2 (CH2) B203.YYYY.xml.gauge3.txt.gz Processed data from gauge 3 (CH3) B203.YYYY.xml.Eee+Enn.txt.gz Processed areal strain, manufacturer's calibration B203.YYYY.xml.Eee-Enn.txt.gz Processed differential strain, manufacturer's calibration B203.YYYY.xml.2Ene.txt.gz Processed engineering shear strain, manufacturer's calibration some tars may contain the additional files B203.YYYY.xml.Eee+Enn.ER2010.txt.gz Processed areal strain, Roeloffs [2010], calibration B203.YYYY.xml.Eee-Enn.ER2010.txt.gz Processed differential strain, Roeloffs [2010], calibration B203.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: 0.05 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 = 290.7 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 -96.730 0.000 0.00000 -0.02161 76.916 -0.00101 CH1 -193.547 0.000 0.00000 -0.00485 168.990 -0.00042 CH2 -73.590 0.000 0.00000 0.00185 71.714 -0.00187 CH3 -33.420 -0.589 0.00108 0.05565 0.000 0.00000 Detrend reference date 2007-07-18T00:00:00 Barometric Response Gauge Response(ns/millibar) CH0 -4.5 CH1 -4.6 CH2 -4.1 CH3 -3.8 Tidal Constituents Gauge Tide Phase Amp(ns) CH0 M2 27.246 15.639 CH0 O1 -52.876 8.444 CH0 P1 -57.506 4.001 CH0 K1 -57.585 11.186 CH0 N2 57.817 4.055 CH0 S2 -25.498 2.151 CH1 M2 -58.724 5.263 CH1 O1 35.414 3.845 CH1 P1 30.561 1.772 CH1 K1 34.318 5.556 CH1 N2 -70.735 0.818 CH1 S2 -58.309 3.083 CH2 M2 164.152 3.065 CH2 O1 89.211 1.710 CH2 P1 73.562 1.111 CH2 K1 65.264 4.885 CH2 N2 -89.862 1.267 CH2 S2 62.915 4.385 CH3 M2 43.423 9.566 CH3 O1 -49.322 4.852 CH3 P1 -53.812 2.086 CH3 K1 -48.788 7.025 CH3 N2 44.444 2.085 CH3 S2 48.480 3.878 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 = 290.7 ISOTROPIC 0.29629674 0.51851819 0.29629615 0.22222225 ISOTROPIC 0.36266651 0.07320398 -0.39194733 -0.04392315 ISOTROPIC -0.14868879 0.36306402 0.00346338 -0.21783860 Hodgkinson et al. (2013) Tidal Calibration KH2013 0.585 1.872 0.877 0.732 KH2013 0.519 -0.049 -0.655 -0.134 KH2013 -0.106 0.729 -0.061 -0.266 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