International Registry of Seismograph Stations




   Station details:
================
      
    
     Code: PRY
Latitude: -26.92830
Longitude:   27.47330
Elevation:  1455.0
Depth: 
Name: Parys
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.
     
     
      Travel time residuals
     
     
      
      
     
     
      Amplitude analysis
     
     
      
     
     
       On the top graph every dot represents the median value for that 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 (if present) shows twice the standard deviation (2 * smad).
The bottom graph shows the number of observations for each month. Any red columns show those observations whose monthly median value is greater than twice the standard deviation (2 * smad) from the overall (running) median (shown in the top graph by red dots).

Red dots indicate a possible calibration error.
     
    
   
 

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

Checked against station bulletin
1973-200106

Data at the ISC for 30 years between 1973 and 2005.

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
================================================================================================================================

PRY    Parys                                                        -26.92830   27.47330    1455.0         25-08-1999 25-08-1999  
       Orange Free State

PRY    Parys                                                        -26.92830   27.47330    1455.0         25-08-1999 15-11-2006  
       Orange Free State,South Africa

PRY    Parys                                                        -26.92530   27.35980    1403.0         15-11-2006 15-11-2006  
       Orange Free State,South Africa

PRY    Parys                                                        -26.92530   27.35980    1403.0         15-11-2006 16-11-2006  
       Orange Free State,South Africa

International Seismological Centre
Pipers Lane, Thatcham, Berkshire
United Kingdom RG19 4NS
voice: +44 (0)1635 861022
fax: +44 (0)1635 872351

web site: http://www.isc.ac.uk/
e-mail: station_reg@isc.ac.uk

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

Amplitude analysis

On the top graph every dot represents the median value for that 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 (if present) shows twice the standard deviation (2 * smad). The bottom graph shows the number of observations for each month. Any red columns show those observations whose monthly median value is greater than twice the standard deviation (2 * smad) from the overall (running) median (shown in the top graph by red dots). Red dots indicate a possible calibration error.