International Registry of Seismograph Stations




   Station details:
================
      
    
     Code: PYA
Latitude:  44.03333
Longitude:   43.05833
Elevation:   544.0
Depth: 
Name: Pyatigorsk
Region: Stavropol'skiy Kray,Russia
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
XC2R4-RAT-RCH-RID-RIM-RKM-RTA-RWM
opened 1909

Data at the ISC for 73 years between 1925 and 2013.

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

PYA    Pyatigorsk                                                    44.03330   43.05830     497.0         25-08-1999 25-08-1999  
       Stravropol'skiy

PYA    Pyatigorsk                                                    44.03333   43.05833     544.0         25-08-1999 31-03-2011  
       Stavropol'skiy Kray,Russia

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.