Scimago Journal & Country Rank

American Journal of Science

Country United States  - SIR icon SIR Ranking of United States
94
H Index
Subject Area and CategoryEarth and Planetary Sciences
Earth and Planetary Sciences (miscellaneous)
PublisherAmerican Journal of Science
Publication typeJournals
ISSN00029599
Coverage1947-1948, 1969, 1973, 1975-ongoing
Scope The American Journal of Science (AJS), founded in 1818 by Benjamin Silliman, is the oldest scientific journal in the United States that has been published continuously. The Journal is devoted to geology and related sciences and publishes articles from around the world presenting results of major research from all earth sciences. Readers are primarily earth scientists in academia and government institutions. AJS had an impact factor of 3.607 for 2003, ranking first for all peer-reviewed earth sciences journals publishing new content (ranking does not include journals that focus on review articles). Articles in AJS tend to be cited for many years, resulting in a citation half-life that exceeds 10 years (all statistics from Thomson ISI).
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Quartiles

The set of journals have been ranked according to their SJR and divided into four equal groups, four quartiles. Q1 (green) comprises the quarter of the journals with the highest values, Q2 (yellow) the second highest values, Q3 (orange) the third highest values and Q4 (red) the lowest values.

CategoryYearQuartile
Earth and Planetary Sciences (miscellaneous)1999Q1
Earth and Planetary Sciences (miscellaneous)2000Q1
Earth and Planetary Sciences (miscellaneous)2001Q1
Earth and Planetary Sciences (miscellaneous)2002Q1
Earth and Planetary Sciences (miscellaneous)2003Q1
Earth and Planetary Sciences (miscellaneous)2004Q1
Earth and Planetary Sciences (miscellaneous)2005Q1
Earth and Planetary Sciences (miscellaneous)2006Q1
Earth and Planetary Sciences (miscellaneous)2007Q1
Earth and Planetary Sciences (miscellaneous)2008Q1
Earth and Planetary Sciences (miscellaneous)2009Q1
Earth and Planetary Sciences (miscellaneous)2010Q1
Earth and Planetary Sciences (miscellaneous)2011Q1
Earth and Planetary Sciences (miscellaneous)2012Q1
Earth and Planetary Sciences (miscellaneous)2013Q1
Earth and Planetary Sciences (miscellaneous)2014Q1
Earth and Planetary Sciences (miscellaneous)2015Q1
Earth and Planetary Sciences (miscellaneous)2016Q1
Earth and Planetary Sciences (miscellaneous)2017Q1
SJR

The SJR is a size-independent prestige indicator that ranks journals by their 'average prestige per article'. It is based on the idea that 'all citations are not created equal'. SJR is a measure of scientific influence of 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 It measures the scientific influence of the average article in a journal, it expresses how central to the global scientific discussion an average article of the journal is.

YearSJR
19991.862
20001.951
20013.265
20022.907
20033.787
20042.885
20052.628
20061.964
20072.342
20082.093
20092.056
20102.271
20112.385
20122.221
20132.411
20142.189
20152.056
20162.502
20172.403
Citations per document

This indicator counts the number of citations received by documents from a journal and divides them by the total number of documents published in that journal. The chart shows the evolution of the average number of times documents published in a journal in the past two, three and four years have been cited in the current year. The two years line is equivalent to journal impact factor ™ (Thomson Reuters) metric.

Cites per documentYearValue
Cites / Doc. (4 years)19991.884
Cites / Doc. (4 years)20002.387
Cites / Doc. (4 years)20013.309
Cites / Doc. (4 years)20023.518
Cites / Doc. (4 years)20034.789
Cites / Doc. (4 years)20044.019
Cites / Doc. (4 years)20054.207
Cites / Doc. (4 years)20063.409
Cites / Doc. (4 years)20073.547
Cites / Doc. (4 years)20083.480
Cites / Doc. (4 years)20093.312
Cites / Doc. (4 years)20103.512
Cites / Doc. (4 years)20113.723
Cites / Doc. (4 years)20125.274
Cites / Doc. (4 years)20135.153
Cites / Doc. (4 years)20144.804
Cites / Doc. (4 years)20153.779
Cites / Doc. (4 years)20164.150
Cites / Doc. (4 years)20174.396
Cites / Doc. (3 years)19991.884
Cites / Doc. (3 years)20002.261
Cites / Doc. (3 years)20013.641
Cites / Doc. (3 years)20023.447
Cites / Doc. (3 years)20034.813
Cites / Doc. (3 years)20043.412
Cites / Doc. (3 years)20053.052
Cites / Doc. (3 years)20063.000
Cites / Doc. (3 years)20073.467
Cites / Doc. (3 years)20082.802
Cites / Doc. (3 years)20092.980
Cites / Doc. (3 years)20103.680
Cites / Doc. (3 years)20113.695
Cites / Doc. (3 years)20124.266
Cites / Doc. (3 years)20134.833
Cites / Doc. (3 years)20144.105
Cites / Doc. (3 years)20153.233
Cites / Doc. (3 years)20164.343
Cites / Doc. (3 years)20174.221
Cites / Doc. (2 years)19991.881
Cites / Doc. (2 years)20002.304
Cites / Doc. (2 years)20013.412
Cites / Doc. (2 years)20023.375
Cites / Doc. (2 years)20034.362
Cites / Doc. (2 years)20042.333
Cites / Doc. (2 years)20052.509
Cites / Doc. (2 years)20062.875
Cites / Doc. (2 years)20072.625
Cites / Doc. (2 years)20082.238
Cites / Doc. (2 years)20092.541
Cites / Doc. (2 years)20103.364
Cites / Doc. (2 years)20112.963
Cites / Doc. (2 years)20123.775
Cites / Doc. (2 years)20134.179
Cites / Doc. (2 years)20143.138
Cites / Doc. (2 years)20153.267
Cites / Doc. (2 years)20164.093
Cites / Doc. (2 years)20173.814
Total Cites 
Self-Cites

Evolution of the total number of citations and journal's self-citations received by a journal's published documents during the three previous years.
Journal Self-citation is defined as the number of citation from a journal citing article to articles published by the same journal.

CitesYearValue
Self Cites199913
Self Cites20005
Self Cites200115
Self Cites200211
Self Cites200316
Self Cites200420
Self Cites200510
Self Cites200612
Self Cites20079
Self Cites20086
Self Cites200912
Self Cites201024
Self Cites201112
Self Cites20128
Self Cites201312
Self Cites201413
Self Cites201511
Self Cites20167
Self Cites201710
Total Cites1999179
Total Cites2000199
Total Cites2001284
Total Cites2002293
Total Cites2003385
Total Cites2004290
Total Cites2005235
Total Cites2006273
Total Cites2007312
Total Cites2008283
Total Cites2009298
Total Cites2010379
Total Cites2011436
Total Cites2012465
Total Cites2013522
Total Cites2014353
Total Cites2015333
Total Cites2016456
Total Cites2017439
External Cites per Doc 
Cites per Doc

Evolution of the number of total citation per document and external citation per document (i.e. journal self-citations removed) received by a journal's published documents during the three previous years. External citations are calculated by subtracting the number of self-citations from the total number of citations received by the journal’s documents.

CitesYearValue
External Cites per document19991.747
External Cites per document20002.205
External Cites per document20013.449
External Cites per document20023.318
External Cites per document20034.613
External Cites per document20043.176
External Cites per document20052.922
External Cites per document20062.868
External Cites per document20073.367
External Cites per document20082.743
External Cites per document20092.860
External Cites per document20103.447
External Cites per document20113.593
External Cites per document20124.193
External Cites per document20134.722
External Cites per document20143.953
External Cites per document20153.126
External Cites per document20164.276
External Cites per document20174.125
Cites per document19991.884
Cites per document20002.261
Cites per document20013.641
Cites per document20023.447
Cites per document20034.813
Cites per document20043.412
Cites per document20053.052
Cites per document20063.000
Cites per document20073.467
Cites per document20082.802
Cites per document20092.980
Cites per document20103.680
Cites per document20113.695
Cites per document20124.266
Cites per document20134.833
Cites per document20144.105
Cites per document20153.233
Cites per document20164.343
Cites per document20174.221
% International Collaboration

International Collaboration accounts for the articles that have been produced by researchers from several countries. The chart shows the ratio of a journal's documents signed by researchers from more than one country; that is including more than one country address.

YearInternational Collaboration
199931.03
200040.91
200129.41
200220.83
200322.22
200422.22
200523.08
200637.93
200738.64
200852.38
200956.25
201052.63
201151.72
201239.29
201348.39
201460.00
201556.67
201648.28
201733.33
Citable documents 
Non-citable documents

Not every article in a journal is considered primary research and therefore "citable", this chart shows the ratio of a journal's articles including substantial research (research articles, conference papers and reviews) in three year windows vs. those documents other than research articles, reviews and conference papers.

DocumentsYearValue
Non-citable documents19990
Non-citable documents20000
Non-citable documents20010
Non-citable documents20020
Non-citable documents20030
Non-citable documents20040
Non-citable documents20051
Non-citable documents20062
Non-citable documents20075
Non-citable documents200811
Non-citable documents200915
Non-citable documents201015
Non-citable documents201113
Non-citable documents20129
Non-citable documents20136
Non-citable documents20142
Non-citable documents20156
Non-citable documents20166
Non-citable documents20175
Citable documents199995
Citable documents200088
Citable documents200178
Citable documents200285
Citable documents200380
Citable documents200485
Citable documents200577
Citable documents200691
Citable documents200790
Citable documents2008101
Citable documents2009100
Citable documents2010103
Citable documents2011118
Citable documents2012109
Citable documents2013108
Citable documents201486
Citable documents2015103
Citable documents2016105
Citable documents2017104
Cited documents 
Uncited documents

Ratio of a journal's items, grouped in three years windows, that have been cited at least once vs. those not cited during the following year.

DocumentsYearValue
Uncited documents199931
Uncited documents200022
Uncited documents200114
Uncited documents200216
Uncited documents200311
Uncited documents200419
Uncited documents200520
Uncited documents200622
Uncited documents200726
Uncited documents200832
Uncited documents200925
Uncited documents201024
Uncited documents201137
Uncited documents201219
Uncited documents201328
Uncited documents201418
Uncited documents201529
Uncited documents201618
Uncited documents201720
Cited documents199964
Cited documents200066
Cited documents200164
Cited documents200269
Cited documents200369
Cited documents200466
Cited documents200558
Cited documents200671
Cited documents200769
Cited documents200880
Cited documents200990
Cited documents201094
Cited documents201194
Cited documents201299
Cited documents201386
Cited documents201470
Cited documents201580
Cited documents201693
Cited documents201789
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