Karl J. Ellefsen

1.2k total citations
78 papers, 853 citations indexed

About

Karl J. Ellefsen is a scholar working on Ocean Engineering, Geophysics and Artificial Intelligence. According to data from OpenAlex, Karl J. Ellefsen has authored 78 papers receiving a total of 853 indexed citations (citations by other indexed papers that have themselves been cited), including 46 papers in Ocean Engineering, 41 papers in Geophysics and 21 papers in Artificial Intelligence. Recurrent topics in Karl J. Ellefsen's work include Geophysical Methods and Applications (40 papers), Seismic Waves and Analysis (28 papers) and Seismic Imaging and Inversion Techniques (26 papers). Karl J. Ellefsen is often cited by papers focused on Geophysical Methods and Applications (40 papers), Seismic Waves and Analysis (28 papers) and Seismic Imaging and Inversion Techniques (26 papers). Karl J. Ellefsen collaborates with scholars based in United States, Ireland and Ghana. Karl J. Ellefsen's co-authors include David B. Smith, Federico Solano, Laurel G. Woodruff, William F. Cannon, Jean M. Morrison, Martin B. Goldhaber, Christopher T. Mills, C. H. Cheng, Jeffrey E. Lucius and M. Nafi Toksöz and has published in prestigious journals such as Journal of Geophysical Research Atmospheres, The Journal of the Acoustical Society of America and Geophysics.

In The Last Decade

Karl J. Ellefsen

65 papers receiving 734 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Karl J. Ellefsen United States 16 399 346 170 166 128 78 853
J. Rey Spain 19 521 1.3× 347 1.0× 138 0.8× 190 1.1× 38 0.3× 60 1.0k
Julián Martínez Spain 17 326 0.8× 302 0.9× 131 0.8× 195 1.2× 41 0.3× 45 679
G. Vargemezis Greece 17 690 1.7× 497 1.4× 61 0.4× 75 0.5× 84 0.7× 79 1.1k
Ryan Noble Australia 18 214 0.5× 103 0.3× 479 2.8× 200 1.2× 72 0.6× 63 1.1k
Liliana Lefticariu United States 20 146 0.4× 120 0.3× 43 0.3× 113 0.7× 106 0.8× 36 953
Norbert G. Swoboda-Colberg United States 8 128 0.3× 57 0.2× 57 0.3× 127 0.8× 185 1.4× 9 684
Gary Wealthall United Kingdom 12 265 0.7× 257 0.7× 28 0.2× 83 0.5× 66 0.5× 22 747
Lawrence D. Lemke United States 17 96 0.2× 210 0.6× 47 0.3× 100 0.6× 248 1.9× 37 968
James W. Castle United States 19 79 0.2× 226 0.7× 32 0.2× 107 0.6× 71 0.6× 57 986

Countries citing papers authored by Karl J. Ellefsen

Since Specialization
Citations

This map shows the geographic impact of Karl J. Ellefsen'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 Karl J. Ellefsen with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Karl J. Ellefsen more than expected).

Fields of papers citing papers by Karl J. Ellefsen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Karl J. Ellefsen. 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 Karl J. Ellefsen. The network helps show where Karl J. Ellefsen may publish in the future.

Co-authorship network of co-authors of Karl J. Ellefsen

This figure shows the co-authorship network connecting the top 25 collaborators of Karl J. Ellefsen. A scholar is included among the top collaborators of Karl J. Ellefsen 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 Karl J. Ellefsen. Karl J. Ellefsen is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Gosen, Bradley S. Van, et al.. (2016). Coastal deposits of heavy mineral sands; Global significance and US resources. Mining Engineering. 68(10). 36–43. 3 indexed citations
2.
Ellefsen, Karl J., Bradley S. Van Gosen, D.L. Fey, et al.. (2015). First steps of integrated spatial modeling of titanium, zirconium, and rare earth element resources within the Coastal Plain sediments of the southeastern United States. Antarctica A Keystone in a Changing World. 6 indexed citations
3.
Mills, Christopher T., Martin B. Goldhaber, Craig A. Stricker, et al.. (2011). Using stable isotopes to understand hydrochemical processes in and around a Prairie Pothole wetland in the Northern Great Plains, USA. Applied Geochemistry. 26. S97–S100. 17 indexed citations
4.
Arbogast, B.F., et al.. (2011). Development of industrial minerals in Colorado. U.S. Geological Survey circular. 1 indexed citations
5.
Haines, Seth S. & Karl J. Ellefsen. (2010). Shear-wave seismic reflection studies of unconsolidated sediments in the near surface. Geophysics. 75(2). B59–B66. 12 indexed citations
6.
Smith, Bruce D., Karl J. Ellefsen, & J.E. Kilburn. (2010). Geochemical data for Colorado soils: Results from the 2006 state-scale geochemical survey. Data series. 7 indexed citations
7.
Ellefsen, Karl J., et al.. (2009). Frequency-domain Green's functions for radar waves in heterogeneous 2.5D media. Geophysics. 74(3). J13–J22. 8 indexed citations
8.
Ellefsen, Karl J.. (2009). A comparison of phase inversion and traveltime tomography for processing near-surface refraction traveltimes. Geophysics. 74(6). WCB11–WCB24. 23 indexed citations
9.
Lucius, Jeffrey E., William H. Langer, & Karl J. Ellefsen. (2007). An Introduction to Using Surface Geophysics to Characterize Sand and Gravel Deposits. U.S. Geological Survey circular. 11 indexed citations
10.
Ellefsen, Karl J. & David L. Wright. (2005). Radiation pattern of a borehole radar antenna. Geophysics. 70(1). K1–K11. 23 indexed citations
11.
Ellefsen, Karl J., et al.. (2004). Numerical study of electromagnetic waves generated by a prototype dielectric logging tool. Geophysics. 69(1). 64–77. 7 indexed citations
12.
Ellefsen, Karl J., et al.. (2001). An Investigation Of Alluvial Sediments Using S-Wave Refraction: A Case Study. 1 indexed citations
13.
Ellefsen, Karl J.. (1999). Effects of layered sediments on the guided wave in crosswell radar data. Geophysics. 64(6). 1698–1707. 25 indexed citations
14.
15.
Ellefsen, Karl J., Daniel R. Burns, & C. H. Cheng. (1993). Homomorphic processing of the tube wave generated during acoustic logging. Geophysics. 58(10). 1400–1407. 7 indexed citations
16.
Ellefsen, Karl J., et al.. (1992). Estimating a shear modulus of a transversely isotropic formation. Geophysics. 57(11). 1428–1434. 8 indexed citations
17.
Ellefsen, Karl J., C. H. Cheng, & M. Nafi Toksöz. (1991). Applications of perturbation theory to acoustic logging. Journal of Geophysical Research Atmospheres. 96(B1). 537–549. 23 indexed citations
18.
Ellefsen, Karl J., et al.. (1990). Elastic wave propagation along a borehole in an anisotropic medium. 14–17. 29 indexed citations
19.
Ellefsen, Karl J., et al.. (1989). Estimating phase velocity and attenuation of guided waves in acoustic logging data. Geophysics. 54(8). 1054–1059. 21 indexed citations
20.
Ellefsen, Karl J., et al.. (1987). Forward-modeling computer program for the inductive electromagnetic ground-conductivity method; EM34.FOR. Antarctica A Keystone in a Changing World. 3 indexed citations

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.

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2026