Station P811

Last observation

Jan 29, 2022

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)
North	14.23	1.24	2022-01-28	-3.52	1.23
East	-7.45	1.22	2022-01-28	0.91	1.14
Up	1.43	3.45	2022-01-28	4.61	4.22

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)
2020-06-04	2020.42437	-0.54	0.53	-0.06	0.5	0.82	1.76	earthquake	5.5	ci39462536	74.1

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 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)
1999-10-15	1999.7885	-8.65	1.91	0.0001	2.06	1.83	0.0001	4.37	5.81	0.0001
2019-07-03	2019.50376	151.99	74.58	0.0001	-40.85	70.18	0.0001	-287.86	243.39	0.0001
2019-07-05	2019.50924	-144.01	71.65	0.0001	40.12	67.37	0.0001	280.52	234.47	0.0001

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	3.47	2.32	2022-01-29	121.32	457.72	2013.197125	2013	73
East	-21.48	2.38	2022-01-29	-7.89	469.98	2013.197125	2013	73
Up	-3.50	5.72	2022-01-29	-555.93	1113.91	2013.197125	2013	73

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	-4.85	6.91	-10.75	6.54	-1.67	23.38	earthquake	6.4	ci38443183	76.9
2019-07-06	2019.50924	17.87	4.72	9.49	4.44	4.87	16.85	earthquake	7.1	ci38457511	77.7
2020-06-04	2020.42437	0.69	0.52	0.28	0.49	3.34	1.71	earthquake	5.5	ci39462536	74.1

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 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)
1999-10-15	1999.7885	-27.48	89.25	0.0001	18.87	91.64	0.0001	108.57	217.14	0.0001
2019-07-03	2019.50376	6.89	4.71	0.0001	8.76	4.46	0.0001	-1.68	15.93	0.0001
2019-07-05	2019.50924	-3.03	4	0.0001	-8.32	3.77	0.0001	1.98	13.87	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	2013.197125	2013	73	0.73	0.12	0.45	0.12	-0.17	0.08	-0.02	0.08					0.07	0.03	-0.05	0.03
East	2013.197125	2013	73	0.42	0.11	-0.49	0.11	-0.35	0.07	0.05	0.08					-0.20	0.03	-0.09	0.03
Up	2013.197125	2013	73	0.32	0.37	0.12	0.37	-0.11	0.27	1.22	0.27					-0.44	0.13	0.41	0.13

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	13.18	2.32	2022-01-29	-193.75	457.98	2013.197125	2013	73
East	-8.77	2.38	2022-01-29	17.79	470.24	2013.197125	2013	73
Up	7.99	5.72	2022-01-29	1631.53	1113.97	2013.197125	2013	73

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	-10.39	6.91	1.4	6.54	30.89	23.38	earthquake	6.4	ci38443183	76.9
2019-07-06	2019.50924	18.65	4.72	2.17	4.44	-10.11	16.85	earthquake	7.1	ci38457511	77.7
2020-06-04	2020.42437	0.42	0.53	0.66	0.5	0.33	1.71	earthquake	5.5	ci39462536	74.1

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 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)
1999-10-15	1999.7885	24.64	89.3	0.0001	3.53	91.69	0.0001	-317.58	217.15	0.0001
2019-07-03	2019.50376	8.61	4.71	0.0001	-0.87	4.46	0.0001	-19.74	15.93	0.0001
2019-07-05	2019.50924	-4.28	4	0.0001	0.78	3.77	0.0001	14.09	13.87	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	2013.197125	2013	73	-0.40	0.12	0.35	0.12	0.08	0.08	0.23	0.08					0.03	0.03	0.06	0.03
East	2013.197125	2013	73	-0.09	0.11	-0.17	0.11	-0.08	0.07	0.02	0.08					-0.08	0.03	-0.02	0.03
Up	2013.197125	2013	73	2.54	0.37	0.34	0.37	-0.08	0.27	0.32	0.27					-0.18	0.13	0.00	0.13

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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