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

Code: PKR
Latitude: -30.00333
Longitude:   24.74167
Elevation:  1267.0
Depth: 
Name: Le Roux Dam
Region: Orange Free State,South Africa
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.
 

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

Checked against station bulletin
before 196903-198511

Data at the ISC for 16 years between 1968 and 1997.