World's Best Scientists 2026 revealed!

D-Index & Metrics

Earth Science

D-Index
50
Citations
5881
World Ranking
3503
National Ranking
1381

R. A. Hoffman publication distribution in Earth Science in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Earth Science in 2026. The highlighted bar marks where R. A. Hoffman sits on this spectrum.

38–42 publications: 1 scientists 43–47 publications: 0 scientists 48–52 publications: 3 scientists 53–57 publications: 8 scientists 58–62 publications: 11 scientists 63–67 publications: 16 scientists 68–72 publications: 24 scientists 73–77 publications: 31 scientists 78–82 publications: 49 scientists 83–87 publications: 77 scientists 88–92 publications: 86 scientists 93–97 publications: 88 scientists 98–102 publications: 92 scientists 103–107 publications: 84 scientists 108–112 publications: 102 scientists 113–117 publications: 108 scientists 118–122 publications: 117 scientists 123–127 publications: 126 scientists 128–132 publications: 146 scientists 133–137 publications: 114 scientists 138–142 publications: 102 scientists 143–147 publications: 127 scientists 148–152 publications: 102 scientists 153–157 publications: 112 scientists 158–162 publications: 102 scientists 163–167 publications: 127 scientists 168–172 publications: 121 scientists 173–177 publications: 112 scientists 178–182 publications: 109 scientists 183–187 publications: 98 scientists 188–192 publications: 92 scientists 193–197 publications: 105 scientists 198–202 publications: 77 scientists 203–207 publications: 80 scientists 208–212 publications: 89 scientists 213–217 publications: 70 scientists 218–222 publications: 74 scientists 223–227 publications: 74 scientists 228–232 publications: 70 scientists 233–237 publications: 67 scientists 238–242 publications: 59 scientists 243–247 publications: 67 scientists 248–252 publications: 51 scientists 253–257 publications: 46 scientists 258–262 publications: 41 scientists 263–267 publications: 39 scientists 268–272 publications: 34 scientists 273–277 publications: 39 scientists 278–282 publications: 35 scientists 283–287 publications: 36 scientists 288–292 publications: 35 scientists 293–297 publications: 29 scientists 298–302 publications: 23 scientists 303–307 publications: 39 scientists 308–312 publications: 34 scientists 313–317 publications: 23 scientists 318–322 publications: 18 scientists 323–327 publications: 18 scientists 328–332 publications: 21 scientists 333–337 publications: 20 scientists 338–342 publications: 15 scientists 343–347 publications: 13 scientists 348–352 publications: 24 scientists 353–357 publications: 25 scientists 358–362 publications: 10 scientists 363–367 publications: 20 scientists 368–372 publications: 17 scientists 373–377 publications: 18 scientists 378–382 publications: 15 scientists 383–387 publications: 7 scientists 388–392 publications: 22 scientists 393–397 publications: 9 scientists 398–402 publications: 11 scientists 403–407 publications: 16 scientists 408–412 publications: 4 scientists 413–417 publications: 5 scientists 418–422 publications: 14 scientists 423–427 publications: 8 scientists 428–432 publications: 7 scientists 433–437 publications: 7 scientists 438–442 publications: 10 scientists 443–447 publications: 10 scientists 448–452 publications: 3 scientists 453–457 publications: 9 scientists 458–462 publications: 11 scientists 463–467 publications: 4 scientists 468–472 publications: 6 scientists 473–477 publications: 11 scientists 478–482 publications: 8 scientists 483–487 publications: 2 scientists 488–492 publications: 3 scientists 493–497 publications: 4 scientists 498–502 publications: 4 scientists 503–507 publications: 4 scientists 508–509 publications: 4 scientists 510+ publications: 100 scientists
38 publications 510+

This scientist: 105 publications — 12th percentile

12% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 510 publications or more.

R. A. Hoffman D-index placement in Earth Science in 2026

The chart shows the D-index (discipline H-index) distribution of Earth Science scientists ranked by Research.com in 2026. The highlighted bar marks where R. A. Hoffman sits on this spectrum.

30 D-Index: 15 scientists 31 D-Index: 42 scientists 32 D-Index: 60 scientists 33 D-Index: 90 scientists 34 D-Index: 103 scientists 35 D-Index: 108 scientists 36 D-Index: 142 scientists 37 D-Index: 147 scientists 38 D-Index: 147 scientists 39 D-Index: 152 scientists 40 D-Index: 143 scientists 41 D-Index: 157 scientists 42 D-Index: 141 scientists 43 D-Index: 151 scientists 44 D-Index: 140 scientists 45 D-Index: 135 scientists 46 D-Index: 121 scientists 47 D-Index: 108 scientists 48 D-Index: 128 scientists 49 D-Index: 111 scientists 50 D-Index: 106 scientists 51 D-Index: 112 scientists 52 D-Index: 102 scientists 53 D-Index: 103 scientists 54 D-Index: 94 scientists 55 D-Index: 61 scientists 56 D-Index: 101 scientists 57 D-Index: 71 scientists 58 D-Index: 65 scientists 59 D-Index: 78 scientists 60 D-Index: 93 scientists 61 D-Index: 56 scientists 62 D-Index: 58 scientists 63 D-Index: 52 scientists 64 D-Index: 63 scientists 65 D-Index: 49 scientists 66 D-Index: 53 scientists 67 D-Index: 57 scientists 68 D-Index: 50 scientists 69 D-Index: 44 scientists 70 D-Index: 44 scientists 71 D-Index: 31 scientists 72 D-Index: 33 scientists 73 D-Index: 33 scientists 74 D-Index: 23 scientists 75 D-Index: 32 scientists 76 D-Index: 24 scientists 77 D-Index: 17 scientists 78 D-Index: 19 scientists 79 D-Index: 9 scientists 80 D-Index: 21 scientists 81 D-Index: 20 scientists 82 D-Index: 17 scientists 83 D-Index: 19 scientists 84 D-Index: 19 scientists 85 D-Index: 14 scientists 86 D-Index: 6 scientists 87 D-Index: 14 scientists 88 D-Index: 17 scientists 89 D-Index: 10 scientists 90 D-Index: 8 scientists 91 D-Index: 8 scientists 92 D-Index: 9 scientists 93 D-Index: 6 scientists 94+ D-Index: 98 scientists
30 D-Index 94+

This scientist: 50 D-Index — 56th percentile

56% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 94 D-Index or more.

Overview

R. A. Hoffman is affiliated with the Goddard Space Flight Center located in the United States. Their research primarily contributes to the fields of Environmental Science and Agricultural and Biological Sciences, with a focus on Ecology and related subfields.

Their recent scholarly output includes publications covering topics in wildlife ecology, conservation, insect science, and animal behavior. Hoffman's work often intersects with specialized areas such as Wildlife Ecology and Conservation, Insect and Pesticide Research, Bee Products Chemical Analysis, Animal Behavior and Welfare Studies, Primate Behavior and Ecology, Plant and Animal Studies, and Isotope Analysis in Ecology.

Notable recent papers authored or coauthored by Hoffman are:

  • Ranging behaviours across ecological and anthropogenic disturbance gradients: a pan-African perspective of giraffe (Giraffa spp.) space use, 2023, Proceedings of the Royal Society B Biological Sciences
  • Effective conservation and management of giraffe require adopting recent advances of their taxonomy, 2025, Biodiversity and Conservation
  • Correction: Effective conservation and management of giraffe require adopting recent advances of their taxonomy, 2025, Biodiversity and Conservation
  • First rangewide density estimate of the endemic and isolated Luangwa giraffe in Zambia, 2025, Scientific Reports

Frequently publishing in prominent scientific venues, Hoffman's high-impact work appears in:

  • Biodiversity and Conservation
  • Proceedings of the Royal Society B Biological Sciences
  • Scientific Reports

Collaboration plays a significant role in Hoffman's research output. Frequent coauthors include:

  • Michael B. Brown
  • Julian Fennessy
  • Stephanie Fennessy
  • Sara Ferguson
  • Arthur Muneza

Hoffman's multidisciplinary approach bridges broad ecological and biological sciences with specific attention to the behavior, conservation, and taxonomy of large mammals such as giraffes. Their engagement in taxonomy-related issues and population density estimation contributes data critical to conservation efforts.

Overall, Hoffman's body of work demonstrates a convergence of ecological research with field and conservation biology, supported by collaborative efforts across diverse experts and institutions.

Best Publications

  • Direct observations in the dusk hours of the characteristics of the storm-time ring current particles during the beginning of magnetic storms

    Paul H. Smith;R. A. Hoffman

  • Energetic particle penetrations into the inner magnetosphere

    M. Ejiri;R.A. Hoffman;Paul H. Smith

  • Field-aligned electron bursts at high latitudes observed by OGO 4.

    R. A. Hoffman;D. S. Evans

  • Characteristics of the inverted-V event

    C. S. Lin;R. A. Hoffman

  • Electrodynamic parameters in the nighttime sector during auroral substorms

    R. Fujii;R. A. Hoffman;P. C. Anderson;J. D. Craven

  • Plasma injection and transport in the mid‐altitude polar cusp

    J. L. Burch;P. H. Reiff;R. A. Heelis;J. D. Winningham

  • Observational evidence for a boundary layer source of dayside region 1 field‐aligned currents

    P. F. Bythrow;R. A. Heelis;W. B. Hanson;R. A. Power

  • The Low Altitude Plasma Instrument /LAPI/

    J. L. Burch;J. D. Winningham;V. A. Blevins;R. A. Hoffman

  • Staircase ion signature in the polar cusp: A case study

    C. P. Escoubet;M. F. Smith;S. F. Fung;P. C. Anderson

  • A Correlation Between Auroral Kilometric Radiation and Inverted-V Electron Precipitation.

    James Lauer Green;Donald A. Gurnett;Robert A. Hoffman

  • Magnetic effects of the quiet-time proton belt.

    R. A. Hoffman;P. A. Bracken

  • Characteristics of auroral electron acceleration regions observed by Atmosphere Explorer C

    J. L. Burch;S. A. Fields;W. B. Hanson;R. A. Heelis

  • Electron precipitation patterns and substorm morphology

    R. A. Hoffman;J. L. Burch

  • Observations of the Van Allen radiation regions during August and September 1959: 1.

    R. L. Arnoldy;R. A. Hoffman;J. R. Winckler

  • Auroral arc electrodynamic parameters measured by AE‐C and the Chatanika Radar

    O. de la Beaujardière;R. Vondrak;R. Heelis;W. Hanson

  • High-Altitude Plasma Instrument for Dynamics Explorer-A

    J. L. Burch;J. D. Winningham;V. A. Blevins;N. Eaker

  • Relationships between field-aligned currents, electric fields and particle precipitation as observed by dynamics Explorer-2

    M. Sugiura;T. Iyemori;R. A. Hoffman;N. C. Maynard

  • X-Rays from Visible Aurorae at Minneapolis

    J. R. Winckler;L. Peterson;R. Arnoldy;R. Hoffman

  • Comparison of very-low-frequency auroral hiss with precipitating low-energy electrons by the use of simultaneous data from two Ogo 4 experiments

    R. A. Hoffman;Thomas Laaspere

  • Inference of the ring current ion composition by means of charge exchange decay

    Paul H. Smith;N. K. Bewtra;R. A. Hoffman

Frequent Co-Authors

Jesper Gjerloev
Jesper Gjerloev Johns Hopkins University Applied Physics Laboratory
James L. Burch
James L. Burch Southwest Research Institute
L. A. Frank
L. A. Frank University of Iowa
Thomas A. Potemra
Thomas A. Potemra Johns Hopkins University Applied Physics Laboratory
W. B. Hanson
W. B. Hanson The University of Texas at Dallas
N. C. Maynard
N. C. Maynard Goddard Space Flight Center
Roderick A. Heelis
Roderick A. Heelis The University of Texas at Dallas
Theodore A. Fritz
Theodore A. Fritz Boston University
James A. Slavin
James A. Slavin University of Michigan–Ann Arbor
J. D. Winningham
J. D. Winningham Southwest Research Institute

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Related Online Degrees & Career Pathways

For those interested in Earth Science, exploring related online degrees can open up diverse career pathways. Many professionals seek flexible learning options, including one year degrees for seniors, which offer accelerated study plans suited for those looking to quickly upskill or pivot careers.

Fields such as library science also connect closely with Earth Science, especially in managing environmental data and research archives. Students often wonder, is library science a good degree? The answer is yes, particularly when paired with specialized knowledge relevant to scientific information management.

If your focus is on organizing and curating scientific resources, consider accredited programs like the ALA MLIS programs, which provide professional credentials for careers in libraries, archives, or information centers involved with Earth Science materials.

Additionally, creative fields such as photography have practical ties to Earth Science through environmental documentation and remote sensing. Pursuing an online degree in photography can enhance your technical skills and complement scientific work with visual storytelling.

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