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

Code: IIM
Latitude:  19.32597
Longitude:  -99.18200
Elevation:  2275.0
Depth: 
Name: Instituto de Ingenieria, UNAM
Region: Mexico D.F.,Mexico
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:
=================

Instituto de Ingenieria, UNAM. Small correction to position Nov 1997
Also sent to NEIS by UNM

Data at the ISC for 12 years between 1978 and 1993.