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Station details:
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Code: E16A
Latitude:  46.53360
Longitude: -111.67640
Elevation:  1398.0
Depth: 
Name: East Helena
Region: Montana,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.
Travel time residuals
 

Station comments:
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Part of the USArray Transportable Array Network

Data at the ISC for 3 years between 2007 and 2009.