World's Best Scientists 2026 revealed!

D-Index & Metrics

Earth Science

D-Index
51
Citations
9082
World Ranking
3239
National Ranking
1295

Frank J. Spera 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 Frank J. Spera sits on this spectrum.

38–47 publications: 5 scientists 48–57 publications: 33 scientists 58–67 publications: 94 scientists 68–77 publications: 161 scientists 78–87 publications: 278 scientists 88–97 publications: 376 scientists 98–107 publications: 404 scientists 108–117 publications: 484 scientists 118–127 publications: 540 scientists 128–137 publications: 557 scientists 138–147 publications: 491 scientists 148–157 publications: 495 scientists 158–167 publications: 458 scientists 168–177 publications: 490 scientists 178–187 publications: 414 scientists 188–197 publications: 401 scientists 198–207 publications: 333 scientists 208–217 publications: 292 scientists 218–227 publications: 290 scientists 228–237 publications: 262 scientists 238–247 publications: 243 scientists 248–257 publications: 208 scientists 258–267 publications: 185 scientists 268–277 publications: 147 scientists 278–287 publications: 128 scientists 288–297 publications: 119 scientists 298–307 publications: 120 scientists 308–317 publications: 107 scientists 318–327 publications: 93 scientists 328–337 publications: 87 scientists 338–347 publications: 64 scientists 348–357 publications: 87 scientists 358–367 publications: 60 scientists 368–377 publications: 60 scientists 378–387 publications: 34 scientists 388–397 publications: 50 scientists 398–407 publications: 44 scientists 408–417 publications: 31 scientists 418–427 publications: 39 scientists 428–437 publications: 27 scientists 438–447 publications: 36 scientists 448–457 publications: 27 scientists 458–467 publications: 29 scientists 468–477 publications: 30 scientists 478–487 publications: 19 scientists 488–497 publications: 15 scientists 498–507 publications: 18 scientists 508–517 publications: 19 scientists 518–527 publications: 16 scientists 528–537 publications: 10 scientists 538–547 publications: 11 scientists 548–557 publications: 14 scientists 558–567 publications: 11 scientists 568–577 publications: 7 scientists 578–587 publications: 14 scientists 588–597 publications: 5 scientists 598–602 publications: 4 scientists 603+ publications: 100 scientists
38 publications 603+

This scientist: 190 publications — 59th percentile

59% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 603 publications or more.

Frank J. Spera 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 Frank J. Spera sits on this spectrum.

30 D-Index: 144 scientists 31 D-Index: 215 scientists 32 D-Index: 278 scientists 33 D-Index: 379 scientists 34 D-Index: 366 scientists 35 D-Index: 372 scientists 36 D-Index: 389 scientists 37 D-Index: 366 scientists 38 D-Index: 344 scientists 39 D-Index: 349 scientists 40 D-Index: 296 scientists 41 D-Index: 289 scientists 42 D-Index: 277 scientists 43 D-Index: 279 scientists 44 D-Index: 248 scientists 45 D-Index: 257 scientists 46 D-Index: 212 scientists 47 D-Index: 202 scientists 48 D-Index: 207 scientists 49 D-Index: 204 scientists 50 D-Index: 183 scientists 51 D-Index: 178 scientists 52 D-Index: 182 scientists 53 D-Index: 178 scientists 54 D-Index: 163 scientists 55 D-Index: 117 scientists 56 D-Index: 163 scientists 57 D-Index: 120 scientists 58 D-Index: 113 scientists 59 D-Index: 136 scientists 60 D-Index: 135 scientists 61 D-Index: 96 scientists 62 D-Index: 103 scientists 63 D-Index: 83 scientists 64 D-Index: 103 scientists 65 D-Index: 83 scientists 66 D-Index: 89 scientists 67 D-Index: 92 scientists 68 D-Index: 89 scientists 69 D-Index: 78 scientists 70 D-Index: 75 scientists 71 D-Index: 53 scientists 72 D-Index: 62 scientists 73 D-Index: 54 scientists 74 D-Index: 35 scientists 75 D-Index: 52 scientists 76 D-Index: 50 scientists 77 D-Index: 32 scientists 78 D-Index: 37 scientists 79 D-Index: 20 scientists 80 D-Index: 33 scientists 81 D-Index: 36 scientists 82 D-Index: 34 scientists 83 D-Index: 34 scientists 84 D-Index: 24 scientists 85 D-Index: 19 scientists 86 D-Index: 18 scientists 87 D-Index: 26 scientists 88 D-Index: 30 scientists 89 D-Index: 17 scientists 90 D-Index: 21 scientists 91 D-Index: 19 scientists 92 D-Index: 15 scientists 93 D-Index: 14 scientists 94 D-Index: 20 scientists 95 D-Index: 9 scientists 96 D-Index: 10 scientists 97 D-Index: 15 scientists 98 D-Index: 13 scientists 99 D-Index: 3 scientists 100 D-Index: 13 scientists 101 D-Index: 3 scientists 102 D-Index: 9 scientists 103 D-Index: 4 scientists 104 D-Index: 6 scientists 105 D-Index: 6 scientists 106+ D-Index: 98 scientists
30 D-Index 106+

This scientist: 51 D-Index — 66th percentile

66% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 106 D-Index or more.

Overview

Frank J. Spera is affiliated with the University of California, Santa Barbara in the United States. Their research primarily falls within the field of Earth and Planetary Sciences, with a significant focus on Geophysics. Additional areas of study include Artificial Intelligence, Atmospheric Science, Astronomy and Astrophysics, and Molecular Biology.

The scientist's work encompasses a range of main topics including:

  • Geological and Geochemical Analysis
  • Earthquake and tectonic studies
  • High-pressure geophysics and materials
  • Geochemistry and Geologic Mapping
  • Geology and Paleoclimatology Research
  • Seismic Waves and Analysis
  • Earthquake Detection and Analysis

Notable recent publications by Frank J. Spera include:

  • Under the surface: Pressure-induced planetary-scale waves, volcanic lightning, and gaseous clouds caused by the submarine eruption of Hunga Tonga-Hunga Ha'apai volcano (2022) in Earthquake Research Advances
  • Diagnosing open-system magmatic processes using the Magma Chamber Simulator (MCS): part I-major elements and phase equilibria (2020) in Contributions to Mineralogy and Petrology
  • Diagnosing open-system magmatic processes using the Magma Chamber Simulator (MCS): part II-trace elements and isotopes (2020) in Contributions to Mineralogy and Petrology
  • Interpretation of Recent Unrest Events (Bradyseism) at Campi Flegrei, Napoli (Italy): Comparison of Models Based on Cyclical Hydrothermal Events versus Shallow Magmatic Intrusive Events (2021) in Geofluids
  • Thermodynamic limits for assimilation of silicate crust in primitive magmas (2021) in Geology

Frequent coauthors include:

  • Wendy A. Bohrson
  • Jussi S. Heinonen
  • Melissa Scruggs
  • Jenna V. Adams
  • Stephen R. McNutt

The scientist's research has been published predominantly in venues such as:

  • Abstracts with Programs - Geological Society of America
  • Contributions to Mineralogy and Petrology
  • American Mineralogist
  • Journal of Petrology
  • Earthquake Research Advances

Best Publications

  • New constraints on the pyroclastic eruptive history of the Campanian volcanic Plain (Italy)

    B. De Vivo;G. Rolandi;P. B. Gans;A. Calvert

  • Energy-constrained open-system magmatic processes I : General model and energy-constrained assimilation and fractional crystallization (EC-AFC) formulation

    F. J. Spera

  • Long-term volumetric eruption rates and magma budgets

    Scott M. White;Joy A. Crisp;Frank J. Spera

  • Energy-Constrained Open-System Magmatic Processes II: Application of Energy-Constrained Assimilation–Fractional Crystallization (EC-AFC) Model to Magmatic Systems

    Wendy A. Bohrson;Frank J. Spera

  • Carbon dioxide in petrogenesis III: role of volatiles in the ascent of alkaline magma with special reference to xenolith-bearing mafic lavas

    Frank J. Spera

  • Under the Surface: Pressure-Induced Planetary-Scale Waves, Volcanic Lightning, and Gaseous Clouds Caused by the Submarine Eruption of Hunga Tonga-Hunga Ha’apai Volcano Provide an Excellent Research Opportunity

    Unknown

  • Case studies on the origin of basalt: II. The transition from tholeiitic to alkalic volcanism on Kohala volcano, Hawaii

    Mark D. Feigenson;Albrecht W. Hofmann;Frank J. Spera

  • High-temperature properties of silicate liquids: applications to the equilibration and ascent of basic magma

    Ian Stuart Edward Carmichael;J. Nicholls;F. J. Spera;Bernard John Wood

  • Co-mingling of acid and basic magma with implications for the origin of mafic I-type xenoliths: Field and petrochemical relations of an unusual dike complex at eagle lake, Sequoia National Park, California, U.S.A.

    Tanya Furman;Frank J. Spera

  • Thermodynamic and Transport Properties of Silicate Melts and Magma

    Charles E. Lesher;Charles E. Lesher;Frank J. Spera

  • Rheology and microstructure of magmatic emulsions : theory and experiments

    Daniel J. Stein;Frank J. Spera

  • Dynamic mixing in magma bodies - Theory, simulations, and implications

    Curtis M. Oldenburg;Frank J. Spera;David A. Yuen;Granville Sewell

  • Thermodynamic Model for Energy-Constrained Open-System Evolution of Crustal Magma Bodies Undergoing Simultaneous Recharge, Assimilation and Crystallization: the Magma Chamber Simulator

    Wendy A. Bohrson;Frank J. Spera;Mark S. Ghiorso;Guy A. Brown

  • Thermal evolution of plutons: a parameterized approach.

    Frank Spera

  • Eruption volume, periodicity, and caldera area: Relationships and inferences on development of compositional zonation in silicic magma chambers

    Frank J. Spera;Joy A. Crisp

  • Lunar magma transport phenomena

    Frank J. Spera

  • Rheology of melts and magmatic suspensions: 1. Design and calibration of concentric cylinder viscometer with application to rhyolitic magma

    Frank J. Spera;Andrea Borgia;James Strimple;Mark Feigenson

  • Open-System Magma Chamber Evolution: an Energy-constrained Geochemical Model Incorporating the Effects of Concurrent Eruption, Recharge, Variable Assimilation and Fractional Crystallization (EC-E'RA FC)

    Frank J. Spera;Wendy A. Bohrson

  • Molecular dynamics of liquid SiO2 under high pressure

    James R. Rustad;David A. Yuen;Frank J. Spera

  • Some Numerical Experiments on the Withdrawal of Magma from Crustal Reservoirs

    Frank J. Spera

  • Thermal boundary layer convection in silicic magma chambers: Effects of temperature‐dependent rheology and implications for thermogravitational chemical fractionation

    Frank J. Spera;David A. Yuen;Stephen J. Kirschvink

  • Carbon Dioxide in igneous petrogenesis: I

    Frank J. Spera;Steven C. Bergman

Frequent Co-Authors

David A. Yuen
David A. Yuen Columbia University
Mark S. Ghiorso
Mark S. Ghiorso Vanderbilt University
Maosheng Miao
Maosheng Miao California State University, Northridge
Curtis M. Oldenburg
Curtis M. Oldenburg Lawrence Berkeley National Laboratory
Matthew G. Jackson
Matthew G. Jackson University of California, Santa Barbara
Matthew D. Jackson
Matthew D. Jackson Imperial College London
Harvey E. Belkin
Harvey E. Belkin United States Geological Survey
David W. Graham
David W. Graham Oregon State University
Mark D. Feigenson
Mark D. Feigenson Rutgers, The State University of New Jersey
John E. Lupton
John E. Lupton Pacific Marine Environmental Laboratory

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