Station details:
================

Code: GCA
Latitude:  36.97361
Longitude: -111.59306
Elevation:  1339.0
Depth: 
Name: Glen Canyon
Region: Arizona,U.S.A.
Status: 

        
Arrival picks statistics
Travel Time Analysis
On the top graph every dot represents the median residual for one month of data. The green line is the overall median; the orange line shows the standard deviation (smad) based on the median absolute deviation (mad), whilst the red line shows twice the standard deviation (2 * smad).
The bottom graph shows the number of residuals for each month. The red columns show the number of residuals whose median (for that month) is outside two standard deviations from the overall median (2 * smad).
Red dots indicate a possible clock error.
Travel time residuals
 

Station comments:
=================

XMR4-WWV
196008-198502
USTN before 197710-198502

Data at the ISC for 28 years between 1960 and 1987.

Known station history:
======================

First and Last use refers to the time period in which the coordinates were used by the ISC.

Code   Station name/Region                                           Latitude  Longitude Elevation   Depth  First use   Last use
================================================================================================================================

GCA    Glen Canyon                                                   36.97360 -111.59300    1339.0         25-08-1999 25-08-1999  
       Arizona