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

Code: QASM
Latitude:  26.09000
Longitude:   43.53600
Elevation:   675.0
Depth: 
Name: Qassim
Region: Saudi Arabia
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:
=================

opened 198801

Data at the ISC for 11 years between 1988 and 1998.

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

QASM   Qassim                                                        26.09000   43.53300     675.0         25-08-1999 25-08-1999  
       Saudi Arabia