Station I40A

Last observation

Dec 25, 2024(1 day ago)

Closest stations

5 closest stations in all 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	1.68	0.12	2024-12-25	15.43	7.28	2000.952772	2000	349
East	-2.80	0.11	2024-12-25	41.49	6.71	2000.952772	2000	349
Up	-0.39	0.36	2024-12-25	-53.42	22.55	2000.952772	2000	349

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)
2010-04-04	2010.25462	-5.98	0.44	-0.07	0.45	2.21	1.45	earthquake	7.2	ci14607652	276.8
2019-07-04	2019.50376	2.57	1.13	2.08	1.16	-2.79	3.7	earthquake	6.4	ci38443183	181.2
2019-07-06	2019.50924	-2.73	1.13	1.51	1.16	0.6	3.7	earthquake	7.1	ci38457511	192.5
2021-02-26	2021.15332	5.28	0.53	1.87	0.53	1.01	1.73	antenna

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	0.60	2.22	1.00	0.50000	2.00000	2	0.157	2.00	0.10
East	0.58	2.46	1.00	0.50000	2.00000	2	0.178	2.00	0.01
Up	1.70	8.48	1.00	0.50000	2.00000	1	0.000	2.00	0.06

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	-6.75	1.73	0.0001	-0.97	1.58	0.0001	11.19	5.34	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	2000.952772	2000	349	0.24	0.10	1.07	0.10	0.12	0.08	-0.12	0.08	-0.09	0.02	0.00	0.02	0.01	0.02	-0.02	0.02
East	2000.952772	2000	349	0.59	0.11	0.38	0.11	0.22	0.08	0.07	0.08	-0.12	0.02	-0.13	0.02	0.04	0.02	-0.08	0.02
Up	2000.952772	2000	349	-1.22	0.26	0.26	0.26	0.41	0.19	-0.62	0.19	0.01	0.07	0.07	0.07	-0.37	0.07	0.05	0.07

ITRF2014