Station AC62

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
North5.650.162020-11-21-47.640.472004.5338812004196
East-14.180.182020-11-21134.190.452004.5338812004196
Up4.930.282020-11-21-40.411.362004.5338812004196

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)
2016-01-24 2016.06297 -0.82 0.49 0.79 0.47 0.69 1.45 earthquake 7.1 us10004gqp 539.3
2018-01-23 2018.06023 -4.86 0.49 -0.6 0.47 -1.96 1.53 earthquake 7.9 us2000cmy3 804.4
2018-05-27 2018.39973 -0.29 0.49 0.54 0.46 -2.37 1.55 Reference Frame Change: IGb08 to IGS14
2018-11-30 2018.9117 -0.38 0.49 1.74 0.46 2.89 1.49 earthquake 7 ak20419010 271.6
2020-07-22 2020.55578 -0.6 0.5 1.38 0.47 0.98 1.55 earthquake 7.8 at00qdux98 1133

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))
North0.851.701.000.500002.0000010.0002.000.50
East0.841.401.000.500002.0000010.0002.000.60
Up3.206.401.000.500002.0000010.0002.000.50

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)
North2004.5338812004196-0.410.090.360.090.230.06-0.280.06-0.110.03-0.070.03
East2004.5338812004196-0.720.08-0.310.090.160.06-0.450.060.020.020.040.02
Up2004.5338812004196-1.900.274.970.280.220.200.250.20-0.170.100.230.10

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-11.920.162020-11-2198.650.472004.5338812004196
East-24.860.182020-11-21222.230.452004.5338812004196
Up4.620.282020-11-21-37.571.362004.5338812004196

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)
2016-01-24 2016.06297 -0.4 0.49 0.69 0.47 0.92 1.45 earthquake 7.1 us10004gqp 539.3
2018-01-23 2018.06023 -4.49 0.49 -0.07 0.47 -2.11 1.53 earthquake 7.9 us2000cmy3 804.4
2018-05-27 2018.39973 -5.53 0.49 1.44 0.46 -3.09 1.55 Reference Frame Change: IGb08 to IGS14
2018-11-30 2018.9117 -0.19 0.49 1.5 0.46 2.8 1.49 earthquake 7 ak20419010 271.6
2020-07-22 2020.55578 -0.63 0.5 0.99 0.47 1.98 1.55 earthquake 7.8 at00qdux98 1133

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))
North0.851.701.000.500002.0000010.0002.000.50
East0.841.401.000.500002.0000010.0002.000.60
Up3.206.401.000.500002.0000010.0002.000.50

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)
North2004.5338812004196-0.720.090.260.090.220.06-0.350.06-0.100.03-0.010.03
East2004.5338812004196-0.580.08-0.020.090.270.06-0.450.060.050.020.050.02
Up2004.5338812004196-1.820.275.430.280.190.200.180.20-0.180.100.310.10

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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