H
Harlan E. Spence
Researcher at University of New Hampshire
Publications - 500
Citations - 21614
Harlan E. Spence is an academic researcher from University of New Hampshire. The author has contributed to research in topics: Van Allen radiation belt & Van Allen Probes. The author has an hindex of 65, co-authored 480 publications receiving 17000 citations. Previous affiliations of Harlan E. Spence include Goddard Space Flight Center & The Aerospace Corporation.
Papers
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Transitional behavior of different energy protons based on Van Allen Probes observations
Chao Yue,Jacob Bortnik,Lunjin Chen,Qianli Ma,Richard M. Thorne,Geoffrey D. Reeves,Harlan E. Spence +6 more
TL;DR: In this article, the authors used Van Allen Probes observations to investigate the H+ dynamics under the regulation of large-scale electric and magnetic fields, the outflow and recombination rates.
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Prediction of MeV electron fluxes throughout the outer radiation belt using multivariate autoregressive models
TL;DR: In this article, 16 prediction models of the electron log-flux variation throughout the equatorial outer radiation belt as a function of the McIlwain L parameter were developed using the multivariate autoregressive model and Kalman filter.
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Evolution of chorus emissions into plasmaspheric hiss observed by Van Allen Probes
Qinghua Zhou,Fuliang Xiao,Chang Yang,Si Liu,Yihua He,John R. Wygant,Daniel N. Baker,Harlan E. Spence,Geoffrey D. Reeves,Herbert O. Funsten +9 more
TL;DR: In this article, the authors reported simultaneous observations form Van Allen Probes that chorus and hiss emissions occurred in the same range ∼300-1500 Hz with the peak wave power density about 10−5 nT2/Hz during a weak storm on 3 July 2014.
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Rapid flattening of butterfly pitch‐angle distributions of radiation belt electrons by whistler‐mode chorus
Chang Yang,Chang Yang,Zhenpeng Su,Fuliang Xiao,Huinan Zheng,Yuming Wang,Shui Wang,Harlan E. Spence,Geoffrey D. Reeves,Daniel N. Baker,J. B. Blake,H. O. Funsten +11 more
TL;DR: In this article, a storm-time radiation belt event where energetic electron PADs changed from butterfly distributions to normal or flattop distributions within several hours was reported, and it was shown that the flattening of butterfly PAD were closely related to the occurrence of whistler-mode chorus waves.
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A multispacecraft event study of Pc5 ultralow-frequency waves in the magnetosphere and their external drivers
Chih‐Ping Wang,Richard M. Thorne,Terry Z. Liu,Michael Hartinger,Tsugunobu Nagai,Vassilis Angelopoulos,John R. Wygant,Aaron Breneman,Craig Kletzing,Geoffrey D. Reeves,Seth G. Claudepierre,Harlan E. Spence +11 more
TL;DR: In this article, the authors investigate a quiet time event of magnetospheric Pc5 ultralow-frequency (ULF) waves and their likely external drivers using multiple spacecraft observations.