N. A. Simmons

3.3k total citations · 1 hit paper
43 papers, 2.6k citations indexed

About

N. A. Simmons is a scholar working on Geophysics, Artificial Intelligence and Atmospheric Science. According to data from OpenAlex, N. A. Simmons has authored 43 papers receiving a total of 2.6k indexed citations (citations by other indexed papers that have themselves been cited), including 40 papers in Geophysics, 3 papers in Artificial Intelligence and 3 papers in Atmospheric Science. Recurrent topics in N. A. Simmons's work include High-pressure geophysics and materials (35 papers), earthquake and tectonic studies (31 papers) and Geological and Geochemical Analysis (22 papers). N. A. Simmons is often cited by papers focused on High-pressure geophysics and materials (35 papers), earthquake and tectonic studies (31 papers) and Geological and Geochemical Analysis (22 papers). N. A. Simmons collaborates with scholars based in United States, Canada and Switzerland. N. A. Simmons's co-authors include S. P. Grand, A. M. Forte, R. Moucha, J. X. Mitrovica, Stephen C. Myers, David B. Rowley, G. Jóhannesson, Lapo Boschi, E. Matzel and S. Quéré and has published in prestigious journals such as Nature, Science and Journal of Geophysical Research Atmospheres.

In The Last Decade

N. A. Simmons

40 papers receiving 2.5k citations

Hit Papers

align trajectories

What are hit papers?

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.

GyPSuM: A joint tomographic model of mantle density and seismic wave speeds

2010 428 citations N. A. Simmons, A. M. Forte et al. Journal of Geophysical Research Atmospheres profile →

Peers

N. A. Simmons

GEOPH

GEOLO

OCEAN

Márcia Maia France

Daniel S. Scheirer United States

Mark Hoggard United Kingdom

Magdala Tesauro Netherlands

Gail Christeson United States

Garrett Ito United States

B. de Voogd France

John S. Oldow United States

A. M. Goodliffe United States

C. Peirce United Kingdom

Márcia Maia France

N. A. Simmons

1.6k ×0.7

GEOPH

333 ×0.8

144 ×0.6

275 ×1.7

GEOLO

117 ×0.9

OCEAN

Citations per year, relative to N. A. Simmons N. A. Simmons (= 1×) peers Márcia Maia

Countries citing papers authored by N. A. Simmons

Since Specialization

Citations

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

Fields of papers citing papers by N. A. Simmons

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by N. A. Simmons. 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 N. A. Simmons. The network helps show where N. A. Simmons may publish in the future.

Co-authorship network of co-authors of N. A. Simmons

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

All Works

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20 of 20 papers shown

Ford, S. R., et al.. (2025). Bayesian Inference for the Seismic Moment Tensor Using Regional Waveforms and Teleseismic-P Polarities with a Data-Derived Distribution of Velocity Models and Source Locations. Bulletin of the Seismological Society of America. 115(4). 1466–1478. 3 indexed citations

Rodgers, Arthur, et al.. (2024). Improved Earthquake Source Parameters with 3D Wavespeed Models in California and Nevada. Seismological Research Letters. 96(1). 499–509. 4 indexed citations

Rodgers, Arthur, et al.. (2024). Adjoint Waveform Tomography for Crustal and Upper Mantle Structure of the Middle East and Southwest Asia for Improved Waveform Simulations Using Openly Available Broadband Data. Bulletin of the Seismological Society of America. 114(3). 1365–1391. 5 indexed citations

Rodgers, Arthur, et al.. (2023). CANVAS: An Adjoint Waveform Tomography Model of California and Nevada. Journal of Geophysical Research Solid Earth. 128(12). 7 indexed citations

Anderson, Gemma J., Stephen C. Myers, & N. A. Simmons. (2023). Emulation of seismic-phase traveltimes with machine learning. Geophysical Journal International. 235(3). 2862–2869. 1 indexed citations

Rodgers, Arthur, et al.. (2022). WUS256: An Adjoint Waveform Tomography Model of the Crust and Upper Mantle of the Western United States for Improved Waveform Simulations. Journal of Geophysical Research Solid Earth. 127(7). 18 indexed citations

Simmons, N. A., et al.. (2021). SPiRaL: a multiresolution global tomography model of seismic wave speeds and radial anisotropy variations in the crust and mantle. Geophysical Journal International. 227(2). 1366–1391. 46 indexed citations

Simmons, N. A., et al.. (2021). Multi-Resolution Seismic Tomography Based on Recursive Tessellation Hierarchy. OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information).

Forte, A. M., et al.. (2014). Retrodicting the Cenozoic evolution of the mantle: Implications for dynamic surface topography. EGU General Assembly Conference Abstracts. 6546. 1 indexed citations

10.

Moucha, R., David B. Rowley, Vadim Levin, N. A. Simmons, & A. M. Forte. (2012). Convective Removal of the Northeastern Portion of the North-American Tectospheric Root and the Late Cenozoic Uplift of the Appalachians. AGUFM. 2012. 1 indexed citations

11.

Flanagan, Megan P., Stephen C. Myers, & N. A. Simmons. (2012). Model-based corrections to observed back azimuth and slowness observations from a dipping Mohorovicic discontinuity. University of North Texas Digital Library (University of North Texas). 2012. 2 indexed citations

12.

Myers, Stephen C., Gardar Johannesson, Douglas A. Dodge, & N. A. Simmons. (2011). Combining Analyst and Waveform-Correlation-Based Arrival Time Measurements in the Bayesloc Multiple-Event Location Algorithm. AGU Fall Meeting Abstracts. 2011. 1 indexed citations

13.

Simmons, N. A., Stephen C. Myers, & G. Jóhannesson. (2011). Global-scalePwave tomography optimized for prediction of teleseismic and regional travel times for Middle East events: 2. Tomographic inversion. Journal of Geophysical Research Atmospheres. 116(B4). 62 indexed citations

14.

Myers, Stephen C., Gardar Johannesson, & N. A. Simmons. (2010). Bayesloc Multiple-Event Location Applied to a Global Data Set. EGU General Assembly Conference Abstracts. 5611. 1 indexed citations

15.

Simmons, N. A., A. M. Forte, Lapo Boschi, & S. P. Grand. (2010). GyPSuM: A Detailed Tomographic Model of Mantle Density and Seismic Wave Speeds. University of North Texas Digital Library (University of North Texas). 2 indexed citations

16.

Simmons, N. A., A. M. Forte, Lapo Boschi, & S. P. Grand. (2010). GyPSuM: A joint tomographic model of mantle density and seismic wave speeds. Journal of Geophysical Research Atmospheres. 115(B12). 428 indexed citations breakdown →

17.

Moucha, R., A. M. Forte, David B. Rowley, et al.. (2009). Reconstructing African topography over the past 30 Myrs with high-resolution tomography-based convection modelling. AGU Fall Meeting Abstracts. 2009. 2 indexed citations

18.

Forte, A. M., R. Moucha, N. A. Simmons, S. P. Grand, & J. X. Mitrovica. (2009). Deep-mantle contributions to the surface dynamics of the North American continent. Tectonophysics. 481(1-4). 3–15. 64 indexed citations

19.

Moucha, R., A. M. Forte, David B. Rowley, et al.. (2008). Late Cenozoic Temporal Evolution of North American Dynamic Topography. AGU Fall Meeting Abstracts. 2008. 1 indexed citations

20.

Simmons, N. A.. (1974). Rockets for Earth Environment Monitoring. JBIS. 27. 1.

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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