Station TOWG

Last observation

Dec 4, 2019

Closest stations

5 closest stations in all networks

NA-fixed

Plots

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 observation	Intercept (mm)	Intercept standard deviation (mm)	Reference date	Reference year	Reference day of year
North	9.54	0.39	2019-12-04	-29.37	0.50	2015.613279	2015	225
East	-8.71	0.41	2019-12-04	111.47	0.48	2015.613279	2015	225
Up	-2.01	0.82	2019-12-04	-4.18	1.49	2015.613279	2015	225

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)
2019-07-04	2019.50376	19.7	7.78	24.82	7.26	19.17	27.31	earthquake	6.4	ci38443183	26.1
2019-07-06	2019.50924	29.68	4.98	-593.22	4.66	68.69	18.1	earthquake	7.1	ci38457511	15.2

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 noise	Amplitude of BP filtered noise (mm)	n₂ (spectral index of second power law)	Amplitude of second power law (mm/yr^(n₂/4))
North	0.85	1.70	1.00	0.50000	2.00000	1	0.000	2.00	0.50
East	0.84	1.40	1.00	0.50000	2.00000	1	0.000	2.00	0.60
Up	3.20	6.40	1.00	0.50000	2.00000	1	0.000	2.00	0.50

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)
2019-07-03	2019.50376	-12.17	5.3	0.0001	-29.12	4.94	0.0001	-14.15	18.59	0.0001
2019-07-05	2019.50924	12.32	4.38	0.0001	17.37	4.08	0.0001	8.93	15.62	0.0001

Seasonal

	Reference date	Reference year	Reference day of year	Amplitude of cosine (365.25-day period), mm	Standard deviation of cosine amplitude (365.25-day period)	Amplitude of sine (365.25-day period), mm	Standard deviation of sine amplitude (365.25-day period)	Amplitude of cosine (180.625-day period), mm	Standard deviation of cosine amplitude (180.625-day period)	Amplitude of sine (180.625-day period), mm	Standard deviation of sine amplitude (180.625-day period)	Amplitude of cosine (14.76-day period), mm	Standard deviation of cosine amplitude (14.76-day period)	Amplitude of sine (14.76-day period), mm	Standard deviation of sine amplitude (14.76-day period)	Amplitude of cosine (13.63-day period), mm	Standard deviation of cosine amplitude (13.63-day period)	Amplitude of sine (13.63-day period), mm	Standard deviation of sine amplitude (13.63-day period)
North	2015.613279	2015	225	-0.62	0.17	-0.83	0.18	0.30	0.12	-0.36	0.12					-0.02	0.05	-0.06	0.05
East	2015.613279	2015	225	-0.33	0.16	0.32	0.17	-0.57	0.11	0.12	0.11					0.04	0.05	-0.23	0.05
Up	2015.613279	2015	225	0.88	0.54	0.97	0.57	-0.97	0.41	1.55	0.40					-0.99	0.19	-0.35	0.19

ITRF2008

Plots

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 observation	Intercept (mm)	Intercept standard deviation (mm)	Reference date	Reference year	Reference day of year
North	-1.87	0.39	2019-12-04	-4.22	0.50	2015.613279	2015	225
East	-21.31	0.41	2019-12-04	140.64	0.47	2015.613279	2015	225
Up	-2.36	0.82	2019-12-04	-3.57	1.49	2015.613279	2015	225

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)
2019-07-04	2019.50376	18.53	7.78	16.12	7.26	41.34	27.31	earthquake	6.4	ci38443183	26.1
2019-07-06	2019.50924	30.73	4.98	-586.66	4.66	60.33	18.1	earthquake	7.1	ci38457511	15.2

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 noise	Amplitude of BP filtered noise (mm)	n₂ (spectral index of second power law)	Amplitude of second power law (mm/yr^(n₂/4))
North	0.85	1.70	1.00	0.50000	2.00000	1	0.000	2.00	0.50
East	0.84	1.40	1.00	0.50000	2.00000	1	0.000	2.00	0.60
Up	3.20	6.40	1.00	0.50000	2.00000	1	0.000	2.00	0.50

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)
2019-07-03	2019.50376	-9.99	5.3	0.0001	-22.45	4.94	0.0001	-31.57	18.59	0.0001
2019-07-05	2019.50924	10.74	4.38	0.0001	10.77	4.08	0.0001	21.97	15.62	0.0001

Seasonal

	Reference date	Reference year	Reference day of year	Amplitude of cosine (365.25-day period), mm	Standard deviation of cosine amplitude (365.25-day period)	Amplitude of sine (365.25-day period), mm	Standard deviation of sine amplitude (365.25-day period)	Amplitude of cosine (180.625-day period), mm	Standard deviation of cosine amplitude (180.625-day period)	Amplitude of sine (180.625-day period), mm	Standard deviation of sine amplitude (180.625-day period)	Amplitude of cosine (14.76-day period), mm	Standard deviation of cosine amplitude (14.76-day period)	Amplitude of sine (14.76-day period), mm	Standard deviation of sine amplitude (14.76-day period)	Amplitude of cosine (13.63-day period), mm	Standard deviation of cosine amplitude (13.63-day period)	Amplitude of sine (13.63-day period), mm	Standard deviation of sine amplitude (13.63-day period)
North	2015.613279	2015	225	-1.46	0.17	-1.18	0.18	0.06	0.12	-0.29	0.12					0.07	0.05	-0.08	0.05
East	2015.613279	2015	225	-0.07	0.16	0.32	0.17	-0.53	0.11	0.08	0.11					0.18	0.05	-0.27	0.05
Up	2015.613279	2015	225	1.22	0.54	1.96	0.57	-1.29	0.41	1.42	0.40					-0.96	0.19	-0.36	0.19

Filtered

Plots

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 observation	Intercept (mm)	Intercept standard deviation (mm)	Reference date	Reference year	Reference day of year
North	9.74	0.39	2019-12-04	-29.37	0.50	2015.613279	2015	225
East	-8.46	0.41	2019-12-04	110.38	0.47	2015.613279	2015	225
Up	-0.33	0.82	2019-12-04	-9.69	1.49	2015.613279	2015	225

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)
2019-07-04	2019.50376	29.78	7.78	39.3	7.26	95.21	27.31	earthquake	6.4	ci38443183	26.1
2019-07-06	2019.50924	19.37	4.98	-602.23	4.66	27.97	18.1	earthquake	7.1	ci38457511	15.2

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 noise	Amplitude of BP filtered noise (mm)	n₂ (spectral index of second power law)	Amplitude of second power law (mm/yr^(n₂/4))
North	0.85	1.70	1.00	0.50000	2.00000	1	0.000	2.00	0.50
East	0.84	1.40	1.00	0.50000	2.00000	1	0.000	2.00	0.60
Up	3.20	6.40	1.00	0.50000	2.00000	1	0.000	2.00	0.50

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)
2019-07-03	2019.50376	-22.03	5.3	0.0001	-41.36	4.94	0.0001	-67.16	18.59	0.0001
2019-07-05	2019.50924	21.53	4.38	0.0001	28.87	4.08	0.0001	51.12	15.62	0.0001

Seasonal

	Reference date	Reference year	Reference day of year	Amplitude of cosine (365.25-day period), mm	Standard deviation of cosine amplitude (365.25-day period)	Amplitude of sine (365.25-day period), mm	Standard deviation of sine amplitude (365.25-day period)	Amplitude of cosine (180.625-day period), mm	Standard deviation of cosine amplitude (180.625-day period)	Amplitude of sine (180.625-day period), mm	Standard deviation of sine amplitude (180.625-day period)	Amplitude of cosine (14.76-day period), mm	Standard deviation of cosine amplitude (14.76-day period)	Amplitude of sine (14.76-day period), mm	Standard deviation of sine amplitude (14.76-day period)	Amplitude of cosine (13.63-day period), mm	Standard deviation of cosine amplitude (13.63-day period)	Amplitude of sine (13.63-day period), mm	Standard deviation of sine amplitude (13.63-day period)
North	2015.613279	2015	225	-0.36	0.17	-0.28	0.18	-0.13	0.12	-0.12	0.12					-0.04	0.05	-0.05	0.05
East	2015.613279	2015	225	0.25	0.16	0.24	0.17	-0.31	0.11	0.31	0.11					-0.18	0.05	-0.14	0.05
Up	2015.613279	2015	225	-1.84	0.54	0.68	0.57	-0.01	0.41	1.21	0.40					0.03	0.19	0.21	0.19

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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