Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
This map shows the geographic impact of Achim Kopf's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Achim Kopf with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Achim Kopf more than expected).
This network shows the impact of papers produced by Achim Kopf. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Achim Kopf. The network helps show where Achim Kopf may publish in the future.
Co-authorship network of co-authors of Achim Kopf
This figure shows the co-authorship network connecting the top 25 collaborators of Achim Kopf.
A scholar is included among the top collaborators of Achim Kopf based on the total number of
citations received by their joint publications. Widths of edges
represent the number of papers authors have co-authored together.
Node borders
signify the number of papers an author published with Achim Kopf. Achim Kopf is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Araki, Eiichiro, D. M. Saffer, Achim Kopf, et al.. (2017). Recurring and triggered slow-slip events near the trench at the Nankai Trough subduction megathrust. Science. 356(6343). 1157–1160.222 indexed citations breakdown →
15.
Toczko, S., et al.. (2011). Lessons Learned during Iodp Expedition 332 Ltbms Deployment. AGU Fall Meeting Abstracts. 2011.1 indexed citations
16.
Kopf, Achim, et al.. (2009). Long-term in situ monitoring at Dashgil mud volcano, Azerbaijan: A link between seismicity, pore pressure transients and methane emission. AGU Fall Meeting Abstracts. 2009.2 indexed citations
17.
Kopf, Achim. (2006). Report and preliminary results of POSEIDON Cruise P336 (POS336): CRESTS - Cretan Sea Tectonics and Sedimentation, Heraklion-Heraklion, 28.04.-17.05.2006.1 indexed citations
18.
Kopf, Achim, Paterno R. Castillo, & Annette Deyhle. (2002). Water-Rock Interaction in the Upper Seismogenic Zone in the Nankai Trough Subduction Factory. AGU Fall Meeting Abstracts. 2002.3 indexed citations
19.
Brown, Kevin M., et al.. (2001). Frictional Coefficients of Multi-Component Sediments: Implications for the Aseismic to Seismic Transition Zone, W. Nankai. AGUFM. 2001.1 indexed citations
20.
Kopf, Achim, Michael B. Clennell, & Rachel Flecker. (1998). Relationship between the variation of undrained shear strength, organic carbon content, and the origin and frequencey of enigmatic normal faults in fine-grained sediments from advanced piston cores from the Eastern Mediterranean. Bristol Research (University of Bristol). 160. 645–661.
Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive
bibliographic database. While OpenAlex provides broad and valuable coverage of the global
research landscape, it—like all bibliographic datasets—has inherent limitations. These include
incomplete records, variations in author disambiguation, differences in journal indexing, and
delays in data updates. As a result, some metrics and network relationships displayed in
Rankless may not fully capture the entirety of a scholar's output or impact.