Station BBDM

NA2014

Plots

Plot showing NA2014 data (All data)

These plots depict the North, East and Up components of the station as a function of time. More detailed explanation »

Dashed vertical lines show offsets (when present) due to:

  • Green – antenna changes from site logs
  • Red – earthquakes
  • Blue – manually entered

Downloads

Velocities

Velocity (mm/yr)Velocity standard deviation (mm/yr)Last observationIntercept (mm)Intercept standard deviation (mm)Reference dateReference yearReference day of year
North31.600.202024-10-03-392.280.622000.725532000266
East-29.700.432024-10-03370.350.702000.725532000266
Up0.190.252024-10-03-2.591.402000.725532000266

Offsets

Decimal date N offset (mm) N uncertainty (mm) E offset (mm) E uncertainty (mm) U offset (mm) U uncertainty (mm) Type Earthquake magnitude Earthquake information Distance from epicenter (km)
2003-12-23 2003.97467 0.01 0.66 -0.79 0.78 -0.7 1.57 earthquake 6.6 nc21323712 160.7
2004-09-28 2004.74196 1.19 0.65 0.2 0.73 -5.07 1.65 earthquake 6 nc30228270 141.5
2005-01-16 2005.04107 3.24 0.72 -5.8 0.84 3.12 1.72 other
2008-02-05 2008.09582 1.2 0.62 -0.6 0.69 1.6 1.48 other
2010-04-04 2010.25462 0.04 0.64 -1.51 0.73 -0.18 1.52 earthquake 7.2 ci14607652 504.6
2019-07-06 2019.50924 -1.36 1.7 -0.15 1.92 -5.35 4.3 earthquake 7.1 ci38457511 253.2

Noise

White noise (mm)Amplitude of first power law (mm/yr^(n1/4))n1 (spectral index of first power law)Lower frequency limit for band-pass (BP) filtered noise (cycle/year)Upper frequency limit for band-pass (BP) filtered noise (cycle/year) Number of poles for BP filtered noiseAmplitude of BP filtered noise (mm)n2 (spectral index of second power law)Amplitude of second power law (mm/yr^(n2/4))
North0.762.281.000.500002.0000020.1052.000.77
East0.612.061.000.500002.0000010.0002.001.90
Up2.078.231.000.500002.0000010.0002.000.25

Post-seismic

Decimal date N log amplitude (mm) N log amplitude standard deviation (mm) N time constant (years) E log amplitude (mm) E log amplitude standard deviation (mm) E time constant (years) U log amplitude (mm) U log amplitude standard deviation (mm) U time constant (years)
2019-07-05 2019.50924 0.28 0.61 0.0001 -1.22 0.79 0.0001 1.92 1.32 0.0001

Seasonal

Reference dateReference yearReference day of yearAmplitude of cosine (365.25-day period), mmStandard deviation of cosine amplitude (365.25-day period)Amplitude of sine (365.25-day period), mmStandard deviation of sine amplitude (365.25-day period)Amplitude of cosine (180.625-day period), mmStandard deviation of cosine amplitude (180.625-day period)Amplitude of sine (180.625-day period), mmStandard deviation of sine amplitude (180.625-day period)Amplitude of cosine (14.76-day period), mmStandard deviation of cosine amplitude (14.76-day period)Amplitude of sine (14.76-day period), mmStandard deviation of sine amplitude (14.76-day period)Amplitude of cosine (13.63-day period), mmStandard deviation of cosine amplitude (13.63-day period)Amplitude of sine (13.63-day period), mmStandard deviation of sine amplitude (13.63-day period)
North2000.725532000266-1.790.110.530.110.010.080.300.080.070.020.050.020.020.020.000.02
East2000.725532000266-0.270.141.800.14-0.370.080.090.08-0.020.020.170.020.060.02-0.040.02
Up2000.725532000266-0.160.25-0.180.250.290.181.600.180.030.07-0.030.07-0.300.07-0.100.07

ITRF2014

Plots

Plot showing ITRF2014 data (All data)

These plots depict the North, East and Up components of the station as a function of time. More detailed explanation »

Dashed vertical lines show offsets (when present) due to:

  • Green – antenna changes from site logs
  • Red – earthquakes
  • Blue – manually entered

Downloads

Velocities

Velocity (mm/yr)Velocity standard deviation (mm/yr)Last observationIntercept (mm)Intercept standard deviation (mm)Reference dateReference yearReference day of year
North20.130.152024-10-03-252.090.652000.725532000266
East-41.300.402024-10-03516.280.792000.725532000266
Up0.070.242024-10-03-1.881.432000.725532000266

Offsets

Decimal date N offset (mm) N uncertainty (mm) E offset (mm) E uncertainty (mm) U offset (mm) U uncertainty (mm) Type Earthquake magnitude Earthquake information Distance from epicenter (km)
2003-12-23 2003.97467 0.54 0.71 -0.64 0.87 -0.91 1.66 earthquake 6.6 nc21323712 160.7
2004-09-28 2004.74196 1.09 0.71 0.24 0.82 -5.18 1.77 earthquake 6 nc30228270 141.5
2005-01-16 2005.04107 2.93 0.77 -6.14 0.94 3.6 1.83 other
2008-02-05 2008.09582 1.2 0.67 -1.25 0.78 2.09 1.56 other
2010-04-04 2010.25462 -0.14 0.69 -1.93 0.82 -0.29 1.6 earthquake 7.2 ci14607652 504.6
2019-07-06 2019.50924 -0.33 1.86 1.65 2.14 -7.75 4.52 earthquake 7.1 ci38457511 253.2

Noise

White noise (mm)Amplitude of first power law (mm/yr^(n1/4))n1 (spectral index of first power law)Lower frequency limit for band-pass (BP) filtered noise (cycle/year)Upper frequency limit for band-pass (BP) filtered noise (cycle/year) Number of poles for BP filtered noiseAmplitude of BP filtered noise (mm)n2 (spectral index of second power law)Amplitude of second power law (mm/yr^(n2/4))
North0.693.381.000.500002.0000010.0002.000.40
East0.622.771.000.500002.0000010.0002.001.70
Up2.039.291.000.500002.0000010.0002.000.01

Post-seismic

Decimal date N log amplitude (mm) N log amplitude standard deviation (mm) N time constant (years) E log amplitude (mm) E log amplitude standard deviation (mm) E time constant (years) U log amplitude (mm) U log amplitude standard deviation (mm) U time constant (years)
2019-07-05 2019.50924 0.43 0.62 0.0001 -2.17 0.85 0.0001 2.83 1.37 0.0001

Seasonal

Reference dateReference yearReference day of yearAmplitude of cosine (365.25-day period), mmStandard deviation of cosine amplitude (365.25-day period)Amplitude of sine (365.25-day period), mmStandard deviation of sine amplitude (365.25-day period)Amplitude of cosine (180.625-day period), mmStandard deviation of cosine amplitude (180.625-day period)Amplitude of sine (180.625-day period), mmStandard deviation of sine amplitude (180.625-day period)Amplitude of cosine (14.76-day period), mmStandard deviation of cosine amplitude (14.76-day period)Amplitude of sine (14.76-day period), mmStandard deviation of sine amplitude (14.76-day period)Amplitude of cosine (13.63-day period), mmStandard deviation of cosine amplitude (13.63-day period)Amplitude of sine (13.63-day period), mmStandard deviation of sine amplitude (13.63-day period)
North2000.725532000266-1.690.110.770.11-0.060.080.320.080.100.030.020.03-0.040.030.090.03
East2000.725532000266-0.050.151.910.15-0.410.090.020.09-0.020.030.210.030.080.02-0.010.02
Up2000.7255320002660.570.27-0.420.270.390.201.430.200.040.08-0.020.08-0.290.08-0.080.07

These results are preliminary. The station positions are unchecked and should not be used for any engineering applications. There may be errors in the antenna heights. The velocities are very dependent on the length of the span of observations. The presence of outliers (errant observations) sometimes contaminates the velocities.

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