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

Code: GDH
Latitude:  69.25000
Longitude:  -53.53330
Elevation:    23.0
Depth: 
Name: Godhavn
Region: Greenland
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
Amplitude analysis
 On the top graph every dot represents the median value for that 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 (if present) shows twice the standard deviation (2 * smad).
The bottom graph shows the number of observations for each month. Any red columns show those observations whose monthly median value is greater than twice the standard deviation (2 * smad) from the overall (running) median (shown in the top graph by red dots).

Red dots indicate a possible calibration error.
 

Station comments:
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Checked against station bulletin
XC1-DIZ-JJY-RID-RIM-RKM-RTA-RWM-WWV
WWSS-1982, DWSS 1982-
19621102-before 199805
WWSS 19621102-19820826?
DWSS 19820826-before 199805
Closed from 2000-05-26 but reopened 2019-07-01

Data at the ISC for 39 years between 1962 and 2022.