Station CMBB

NA-fixed

Plots

Plot showing NA-fixed 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
North8.360.152019-09-17-128.760.68199419941
East-9.560.282019-09-17134.580.79199419941
Up1.701.452019-09-17-588.093.11199419941

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)
1997-08-21 1997.63518 1.64 0.73 -0.93 0.85 -12.81 3.37 antenna
1999-10-16 1999.7885 -0.3 0.76 -0.16 0.84 0.06 3.22 earthquake 7.1 ci9108652 530.7
2000-01-07 2000.01643 12.59 0.83 2.45 0.94 712.37 3.66 antenna
2003-12-23 2003.97467 0.19 0.71 -0.03 0.82 2.61 3.21 earthquake 6.6 nc21323712 266.7
2005-06-15 2005.45175 -0.51 0.71 0.22 0.82 -2.08 3.21 earthquake 7.2 usp000dt25 598.8
2018-05-27 2018.39973 -0.29 0.68 -0.24 0.79 0.47 3.06 Reference Frame Change: IGb08 to IGS14
2019-07-06 2019.50924 -0.72 2.37 1.35 2.58 0.04 9.32 earthquake 7.1 ci38457511 353.2

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))
North0.613.271.000.500002.0000020.2152.000.48
East0.981.911.000.500002.0000010.1992.001.28
Up2.6110.721.000.500002.0000010.0002.006.60

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)
2019-07-06 2019.50924 0.35 0.95 0.0001 -0.74 1.02 0.0001 -1.45 3.83 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 (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)
North1994199410.240.140.850.14-0.130.100.130.100.040.020.020.02
East1994199410.560.130.330.130.120.10-0.170.100.120.030.080.03
Up1994199410.470.55-4.760.55-0.710.34-1.030.340.110.10-0.200.10

ITRF2008

Plots

Plot showing ITRF2008 data (All data)

These plots depict the X, Y, and Z 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
North-2.920.092019-09-1730.930.61199419941
East-22.330.162019-09-17318.090.78199419941
Up1.041.312019-09-17-576.673.18199419941

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)
1997-08-21 1997.63518 1.09 0.68 -0.57 0.84 -12.31 3.46 antenna
1999-10-16 1999.7885 -0.33 0.78 -0.74 0.88 0.15 3.32 earthquake 7.1 ci9108652 530.7
2000-01-07 2000.01643 12.76 0.83 2.95 0.96 713.66 3.76 antenna
2003-12-23 2003.97467 0.61 0.67 -0.38 0.82 2.56 3.3 earthquake 6.6 nc21323712 266.7
2005-06-15 2005.45175 -1.02 0.68 0.12 0.82 -2.75 3.29 earthquake 7.2 usp000dt25 598.8
2018-05-27 2018.39973 -4.08 0.66 -0.92 0.79 0.77 3.14 Reference Frame Change: IGb08 to IGS14
2019-07-06 2019.50924 1.24 2.52 2.36 2.79 -1.36 9.66 earthquake 7.1 ci38457511 353.2

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))
North0.543.911.000.500002.0000020.2192.000.06
East0.743.881.000.500002.0000020.1912.000.50
Up2.3712.401.000.500002.0000010.0002.005.75

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)
2019-07-06 2019.50924 -0.24 0.99 0.0001 -1.56 1.1 0.0001 -0.14 3.94 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 (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)
North1994199410.510.141.050.14-0.110.110.040.11-0.010.030.020.03
East1994199410.600.150.220.150.210.11-0.180.110.130.030.090.03
Up1994199410.320.55-5.110.56-0.790.35-1.070.350.120.10-0.190.10

Filtered

Plots

Plot showing Filtered 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
North8.310.172019-09-17-110.190.411998.7583851998278
East-9.530.182019-09-17110.760.461998.7583851998278
Up1.311.032019-09-17-710.792.111998.7583851998278

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)
1999-10-16 1999.7885 -0.04 0.32 -0.13 0.36 1.34 1.61 earthquake 7.1 ci9108652 530.7
2000-01-07 2000.01643 11.45 0.35 2.08 0.39 709.51 1.77 antenna
2003-12-23 2003.97467 0.29 0.32 0.21 0.36 2.53 1.61 earthquake 6.6 nc21323712 266.7
2005-06-15 2005.45175 -0.18 0.32 0.11 0.36 -0.9 1.6 earthquake 7.2 usp000dt25 598.8
2018-05-27 2018.39973 -0.02 0.31 0.01 0.35 1.47 1.57 Reference Frame Change: IGb08 to IGS14
2019-07-06 2019.50924 0.52 1.09 0.74 1.18 -2.72 5.04 earthquake 7.1 ci38457511 353.2

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))
North0.810.051.000.500002.0000010.0602.000.75
East0.730.671.000.500002.0000010.0002.000.75
Up3.430.021.000.500002.0000010.2902.004.62

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)
2019-07-06 2019.50924 -0.1 0.42 0.0001 -0.21 0.45 0.0001 0.98 2 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 (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)
North1998.7583851998278-0.030.050.000.05-0.030.04-0.140.040.000.010.000.01
East1998.75838519982780.160.06-0.070.06-0.050.040.050.04-0.030.02-0.030.02
Up1998.7583851998278-0.010.270.510.260.230.180.170.180.050.060.010.06

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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