Station AB08

Last observation

Jan 25, 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)	Reference date	Reference year	Reference day of year
North	-5.41	0.23	2022-01-25	23.71	0.50	2009.443532	2009	163
East	4.46	0.24	2022-01-25	-15.95	0.47	2009.443532	2009	163
Up	-0.39	0.52	2022-01-25	0.01	1.57	2009.443532	2009	163

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)
2009-09-30	2009.7447	5.74	0.62	0.35	0.59	-0.32	1.83	antenna
2013-05-30	2013.40794	0.24	0.94	-4.16	0.95	2.93	2.38	antenna
2014-06-23	2014.47365	0.45	0.49	-0.26	0.47	-0.37	1.51	earthquake	7.9	usc000rki5	1223.2
2017-08-18	2017.62697	-1.15	0.57	0.37	0.54	0.76	1.72	antenna
2018-01-23	2018.06023	-0.93	0.5	-0.8	0.47	-1.11	1.56	earthquake	7.9	us2000cmy3	1108.6
2020-07-22	2020.55578	-2.89	0.51	4.12	0.47	2.39	1.61	earthquake	7.8	at00qdux98	750.4
2020-10-19	2020.79945	-1.66	0.5	-0.35	0.47	0.45	1.61	earthquake	7.6	us6000c9hg	752.4
2021-07-29	2021.57221	-6.67	0.5	6.54	0.47	0.05	1.55	earthquake	8.2	ak0219neiszm	749.4

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

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	2009.443532	2009	163	2.55	0.11	0.57	0.11	0.66	0.07	-0.21	0.07					0.05	0.03	-0.07	0.03
East	2009.443532	2009	163	-0.55	0.10	-2.71	0.10	-0.40	0.07	-0.51	0.07					-0.11	0.03	0.03	0.03
Up	2009.443532	2009	163	-1.95	0.33	-1.21	0.34	-0.10	0.24	-0.07	0.24					0.45	0.11	0.03	0.11

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

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)
2009-09-30	2009.7447	6.35	0.62	-0.1	0.59	-1.32	1.83	antenna
2013-05-30	2013.40794	1.2	0.94	-3.98	0.95	1.52	2.38	antenna
2014-06-23	2014.47365	1.03	0.49	-1.07	0.47	0.18	1.51	earthquake	7.9	usc000rki5	1223.2
2017-08-18	2017.62697	-1.58	0.57	0.33	0.54	0.88	1.72	antenna
2018-01-23	2018.06023	-1.12	0.5	-0.17	0.47	-1.62	1.56	earthquake	7.9	us2000cmy3	1108.6
2020-07-22	2020.55578	-3.01	0.51	3.57	0.47	3.46	1.61	earthquake	7.8	at00qdux98	750.4
2020-10-19	2020.79945	-1.97	0.5	-0.08	0.47	-0.98	1.61	earthquake	7.6	us6000c9hg	752.4
2021-07-29	2021.57221	-6.76	0.5	6.57	0.47	2.56	1.55	earthquake	8.2	ak0219neiszm	749.4

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

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	2009.443532	2009	163	2.31	0.11	0.41	0.11	0.69	0.07	-0.36	0.07					0.02	0.03	-0.05	0.03
East	2009.443532	2009	163	-0.57	0.10	-2.35	0.10	-0.36	0.07	-0.28	0.07					-0.09	0.03	0.07	0.03
Up	2009.443532	2009	163	-2.35	0.33	-0.75	0.34	0.12	0.24	-0.11	0.24					0.46	0.11	-0.03	0.11

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.

« Back to Alaska Network