Service International des Indices Géomagnétiques
International Service of Geomagnetic Indices
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ASY/SYM
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aσ
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ISGI monthly bulletins
The ISGI monthly bulletins may be uploaded, from 1994 onwards, as pdf files.
1994
:
Special Issue
1996
:
January
February
March
April
May
June
July
August
September
October
November
December
1997
:
January
February
March
April
May
June
July
August
September
October
November
December
1998
:
January
February
March
April
May
June
July
August
September
October
November
December
1999
:
January
February
March
April
May
June
July
August
September
October
November
December
2000
:
January
February
March
April
May
June
July
August
September
October
November
December
2001
:
January
February
March
April
May
June
July
August
September
October
November
December
2002
:
January
February
March
April
May
June
July
August
September
October
November
December
2003
:
January
February
March
April
May
June
July
August
September
October
November
December
2004
:
January
February
March
April
May
June
July
August
September
October
November
December
2005
:
January
February
March
April
May
June
July
August
September
October
November
December
2006
:
January
February
March
April
May
June
July
August
September
October
November
December
2007
:
January
February
March
April
May
June
July
August
September
October
November
December
2008
:
January
February
March
April
May
June
July
August
September
October
November
December
2009
:
January
February
March
April
May
June
July
August
September
October
November
December
2010
:
January
February
March
April
May
June
July
August
September
October
November
December
2011
:
January
February
March
April
May
June
July
August
September
October
November
December
2012
:
January
February
March
April
May
June
July
August
September
October
November
December
2013
:
January
February
March
April
May
June
July
August
September
October
November
December
2014
:
January
February
March
April
May
June
July
August
September
October
November
December
2015
:
January
February
March
April
May
June
July
August
September
October
November
December
2016
:
January
February
March
April
May
June
July
August
September
October
November
December
2017
:
January
February
March
April
May
June
July
August
September
October
November
December
2018
:
January
February
March
April
May
June
July
August
September
October
November
December
2019
:
January
February
March
April
May
June
July
August
September
October
November
December
2020
:
January
February
March
April
May
June
July
August
September
October
November
December
2021
:
January
February
March
April
May
June
July
August
September
October
November
December
2022
:
January
February
March
April
May
June
July
August
September
October
November
December
2023
:
January
February
March
April
May
June
July
August
September
October
November
December
2024
:
January
February
March
April
May
June
July
August
September
October
November
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