Station details:
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Code: SAP
Latitude:  43.05830
Longitude:  141.33200
Elevation:    17.0
Depth: 
Name: Sapporo
Region: Ishikari,Japan
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:
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Checked against station bulletin
XC2-JJY
moved 193907
JMA code SAPPOR

Data at the ISC for 75 years between 1920 and 1995.