Station AC63

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
North1.430.292022-09-25179.6917.512004.5284052004194
East0.970.312022-09-25-242.5118.562004.5284052004194
Up7.160.602022-09-25-139.6737.482004.5284052004194

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)
2018-01-23 2018.06023 -3.27 0.49 -2 0.46 -0.99 1.48 earthquake 7.9 us2000cmy3 855.1
2018-11-30 2018.9117 -0.51 0.49 -0.61 0.46 2.3 1.48 earthquake 7 ak20419010 321.4
2020-07-22 2020.55578 -0.76 0.49 0.23 0.46 0.71 1.47 earthquake 7.8 at00qdux98 1182.7
2021-07-29 2021.57221 0.1 0.5 -0.53 0.47 0.16 1.51 earthquake 8.2 ak0219neiszm 1132.1

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

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)
2002-10-23 2002.80767 -13.4 1.48 0.0001 15.68 1.56 0.0001 3.26 3.16 0.0001
2002-11-03 2002.83778 -25.13 2.63 0.0001 31.56 2.79 0.0001 11.69 5.53 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)
North2004.5284052004194-0.830.08-0.010.080.180.06-0.120.06-0.010.02-0.160.02
East2004.5284052004194-0.040.08-0.010.080.030.05-0.070.050.020.020.020.02
Up2004.5284052004194-1.740.254.020.26-0.410.190.020.19-0.210.09-0.140.09

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
North-16.650.292022-09-25347.0317.512004.5284052004194
East-10.230.312022-09-25-146.7518.562004.5284052004194
Up6.870.602022-09-25-141.0337.482004.5284052004194

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)
2018-01-23 2018.06023 -3.6 0.49 -1.96 0.46 -0.2 1.48 earthquake 7.9 us2000cmy3 855.1
2018-11-30 2018.9117 -0.33 0.49 -0.59 0.46 2.61 1.48 earthquake 7 ak20419010 321.4
2020-07-22 2020.55578 -0.79 0.49 -0 0.46 0.69 1.47 earthquake 7.8 at00qdux98 1182.7
2021-07-29 2021.57221 0.01 0.5 -0.49 0.47 1.85 1.51 earthquake 8.2 ak0219neiszm 1132.1

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

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)
2002-10-23 2002.80767 -8.69 1.48 0.0001 19.14 1.56 0.0001 3.59 3.16 0.0001
2002-11-03 2002.83778 -30.43 2.63 0.0001 29.26 2.79 0.0001 12.12 5.53 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)
North2004.5284052004194-0.830.080.280.080.200.06-0.120.06-0.100.02-0.100.02
East2004.52840520041940.090.080.270.080.120.050.000.050.020.020.050.02
Up2004.5284052004194-1.400.254.560.26-0.270.190.170.19-0.260.09-0.090.09

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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