SNIP measures contextual citation impact by weighting citations based on the total number of citations in a subject field.
SJR is a prestige metric based on the idea that not all citations are the same. SJR uses a similar algorithm as the Google page rank; it provides a quantitative and a qualitative measure of the journal’s impact.
The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years.
© Thomson Reuters Journal Citation Reports 2015
To calculate the five year Impact Factor, citations are counted in 2014 to the previous five years and divided by the source items published in the previous five years.
© Journal Citation Reports 2015, Published by Thomson Reuters
The Journal of South American Earth Sciences provides an international medium for the publication of scientific work concerned with all aspects of the earth sciences in the South American continent and the surrounding oceans. Work is also accepted from the adjacent regions of the Caribbean, Central America, Mexico, and Antarctic Peninsula.
Papers must have a regional appeal and should present work of more than local significance. Research papers dealing with the regional geology of South American cratons and mobile belts; economic geology particularly metallogenesis and hydrocarbon genesis; stratigraphy, structure and basin evolution; geophysics and geochemistry; volcanology; tectonics and Quaternary geology are featured.
New developments in already established regional projects and new initiatives dealing with the geology of the continent will be summarized and presented on a regular basis. Short notes, discussions, book reviews and conference and workshop reports will also be included when relevant. See http://www.elsevier.com/locate/sames-edit for the editorial.
The Journal of South American Earth Sciences is also available as part of the Geoscience Package which comprises Journal of African Earth Sciences, Journal of Asian Earth Sciences and Journal of South American Earth Sciences. See Geoscience Package for details.