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

Code: GPD
Latitude:  41.01770
Longitude:  -74.46080
Elevation:   360.0
Depth: 
Name: Greenpond
Region: New Jersey,U.S.A.
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:
=================

opened 197608
USTN 19770124-19850115
19930224-19951207

Data at the ISC for 25 years between 1976 and 2007.