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

Code: OBN
Latitude:  55.11380
Longitude:   36.56870
Elevation: 
Depth: 
Name: Obninsk
Region: Kaluzhskaya Oblast',Russia
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:
=================

Checked against station bulletin
Central observatory near Moscow
XC2R4-RAT-RCH-RID-RIM-RKM-RTA-RWM
opened 1967
IRIS-IDA opened 19880914

Data at the ISC for 57 years between 1969 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
================================================================================================================================

OBN    Obninsk                                                       55.16670   36.60000                   21-01-2003             
       Kaluzhskaya

OBN    Obninsk                                                       55.11670   36.60000                                          
       Kaluzhskaya