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Impact Factor & Key Scientometrics

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Impact Factor


H Index


Impact Factor


I. Basic Journal Info


United States
Journal ISSN: 10525173
Publisher: Geological Society of America
History: 1991-2021
Journal Hompage: Link
How to Get Published:

Research Categories


GSAs science and news magazine for members and the earthscience community world wide. Features a hottopic science article most months.

II. Science Citation Report (SCR)

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SCR Impact Factor

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SCR Journal Ranking

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SCImago SJR Rank

SCImago Journal Rank (SJR indicator) is a measure of scientific influence of scholarly journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from.

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Scopus 2-Year Impact Factor Trend

Note: impact factor data for reference only

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Scopus 3-Year Impact Factor Trend

Note: impact factor data for reference only

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Scopus 4-Year Impact Factor Trend

Note: impact factor data for reference only

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Impact Factor History

2-year 3-year 4-year
  • 2022 Impact Factor
    2.81 2.846 2.838
  • 2021 Impact Factor
    2.216 2.226 2.823
  • 2020 Impact Factor
    3.038 3.423 3.687
  • 2019 Impact Factor
    3.381 3.561 3.039
  • 2018 Impact Factor
    3.488 2.836 2.663
  • 2017 Impact Factor
    2.2 2.015 2.034
  • 2016 Impact Factor
    2.196 2.324 2.901
  • 2015 Impact Factor
    1.685 2.662 2.989
  • 2014 Impact Factor
    2.975 NA NA
  • 2013 Impact Factor
    3.41 NA NA
  • 2012 Impact Factor
    2.878 NA NA
  • 2011 Impact Factor
    2.137 NA NA
  • 2010 Impact Factor
    3.93 NA NA
  • 2009 Impact Factor
    2.2 NA NA
  • 2008 Impact Factor
    1.887 NA NA
  • 2007 Impact Factor
    3 NA NA
  • 2006 Impact Factor
    3.395 NA NA
  • 2005 Impact Factor
    3.839 NA NA
  • 2004 Impact Factor
    6 NA NA
  • 2003 Impact Factor
    4.96 NA NA
  • 2002 Impact Factor
    5 NA NA
  • 2001 Impact Factor
    3.103 NA NA
  • 2000 Impact Factor
    3.258 NA NA
Note: impact factor data for reference only




Impact Factor

Impact factor (IF) is a scientometric factor based on the yearly average number of citations on articles published by a particular journal in the last two years. A journal impact factor is frequently used as a proxy for the relative importance of a journal within its field. Find out more: What is a good impact factor?

III. Other Science Influence Indicators

Any impact factor or scientometric indicator alone will not give you the full picture of a science journal. There are also other factors such as H-Index, Self-Citation Ratio, SJR, SNIP, etc. Researchers may also consider the practical aspect of a journal such as publication fees, acceptance rate, review speed. (Learn More)

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The h-index is an author-level metric that attempts to measure both the productivity and citation impact of the publications of a scientist or scholar. The index is based on the set of the scientist's most cited papers and the number of citations that they have received in other publications


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H-Index History