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

Code: LCH
Latitude:  37.23300
Longitude: -117.64500
Elevation:  1414.0
Depth: 
Name: Last Change Range
Region: California,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:
=================

Last Change Range
USGS 19790713-19921001
REN opened 19921001
MNLO code LCHD
Coords corrected slightly 20021207

Data at the ISC for 18 years between 1981 and 2020.