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

Code: ECHA
Latitude:  36.15000
Longitude:    1.36667
Elevation:     0.0
Depth: 
Name: Ech Chlef
Region: Algeria
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:
=================

ALG code ECH
Moved to ECHF

Data at the ISC for 21 years between 2004 and 2024.