Station AC27

Last observation

Dec 18, 2024(2 days ago)

Closest stations

5 closest stations in all networks

This station is not in any other networks.

NA2014

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	-8.07	0.17	2024-12-18	84.36	0.47	2004.711841	2004	261
East	2.93	0.19	2024-12-18	-29.01	0.45	2004.711841	2004	261
Up	3.19	0.34	2024-12-18	-35.54	1.37	2004.711841	2004	261

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)
2009-09-13	2009.69815	0.09	0.49	-0.33	0.46	1.2	1.47	antenna
2015-05-29	2015.4052	-0.11	0.49	0.85	0.46	-0.17	1.48	earthquake	6.7	ak11610140	325.1
2016-01-24	2016.06297	-5.18	1.56	0.6	1.34	7.35	4.52	earthquake	7.1	us10004gqp	60.6
2018-01-23	2018.06023	-2.34	1.43	-5.15	1.35	-11.85	4.69	earthquake	7.9	us2000cmy3	468.7
2018-11-30	2018.9117	0.64	0.5	-0.67	0.47	3.21	1.58	earthquake	7	ak20419010	328.8
2020-07-22	2020.55578	-1.73	0.5	-0.29	0.47	1.66	1.58	earthquake	7.8	at00qdux98	538.8
2020-10-19	2020.79945	-1.85	0.5	-3.04	0.47	2.42	1.59	earthquake	7.6	us6000c9hg	615.2
2021-07-29	2021.57221	-6.19	1.39	2.61	1.33	1.82	4.39	earthquake	8.2	ak0219neiszm	490.1

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)
2016-01-24	2016.06297	2.5	0.53	0.0001	0.08	0.47	0.0001	-1.31	1.41	0.0001
2018-01-23	2018.06023	2.94	0.49	0.0001	-1.31	0.47	0.0001	2.72	1.49	0.0001
2021-07-28	2021.57221	-0.69	0.47	0.0001	-1.62	0.46	0.0001	-0.3	1.34	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	2004.711841	2004	261	-1.11	0.08	1.04	0.08	-0.50	0.05	-0.05	0.05	-0.15	0.02	-0.09	0.02	0.04	0.02	-0.13	0.02
East	2004.711841	2004	261	0.03	0.07	0.11	0.08	-0.11	0.05	0.33	0.05	-0.01	0.02	-0.05	0.02	-0.05	0.02	0.13	0.02
Up	2004.711841	2004	261	3.76	0.25	2.92	0.25	-0.83	0.18	-0.68	0.18	-0.16	0.09	-0.09	0.09	0.04	0.09	-0.05	0.09

ITRF2014