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

Code: NOA
Latitude:  61.03972
Longitude:   11.21475
Elevation:   717.0
Depth: 
Name: NORSAR Array Beam Reference Point
Region: Norway
Status: 

        
NOA is an alternative code for NB2

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:
=================

NORSAR Array Beam Reference Point
Coords corrected 199906

Data at the ISC for 31 years between 1973 and 2025.

Known station history:
======================

First and Last use refers to the time period in which the coordinates were used by the ISC.

Code   Station name/Region                                           Latitude  Longitude Elevation   Depth  First use   Last use
================================================================================================================================

NOA    NORSAR Array                                                  60.82370   10.83240     374.0         25-08-1999 25-08-1999  
       Norway

NOA    NORSAR Array                                                  60.82372   10.83236     374.0         25-08-1999 03-03-2000  
       Norway

NOA    NORSAR Array                                                  61.03972   11.21475     717.0         03-03-2000 21-08-2003  
       Norway