Citation Rankings (Highly Cited Researchers) and the list of the most cited and influential researchers cover a wide range of scientific fields, spanning 197 main and sub-disciplines, as well as the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings, offering a unique service. Additionally, the list without CERN, Statistical Data, etc., provided exclusively by “AD Scientific Index”, is part of our effort to balance the situation created by CERN and researchers with statistical data, who have an advantage over others, especially those in the social and humanities fields. There should be new regulations for multi-author and CERN papers. Citation lists also reveal many rule violations and unethical practices. See also for more specific citation analyses: Scientists Last 6 years Citation Index, Universities Total Citations Rankings 2025 and Universities Last 6 Years Citations Rankings 2025
* Total Citation Counts Rankings
Ranking Based On Selection :1
Igneous petrology
physical volcanology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,443
1,098
0.761
* Total Citation Counts Rankings
Ranking Based On Selection :2
Geochemistry
MIneralogy
Petrology
Geothermal
Environmental
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
741
242
0.327
Geoff Kilgour
GNS Science
Lower Hutt, New Zealand
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,443
1,098
0.761
Igneous petrology
physical volcanology
Debra Chappell
GNS Science
Lower Hutt, New Zealand
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
741
242
0.327
Geochemistry
MIneralogy
Petrology
Geothermal
Environmental