Imperial College London

Dr Jonathan P. Eastwood

Faculty of Natural SciencesDepartment of Physics

Senior Lecturer
 
 
 
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Contact

 

+44 (0)20 7594 8101jonathan.eastwood Website

 
 
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Location

 

6M63Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Publication Type
Year
to

157 results found

Archer MO, Horbury TS, Eastwood JP, 2012, Magnetosheath pressure pulses: Generation downstream of the bow shock from solar wind discontinuities, Journal of Geophyical Research, Vol: 117, ISSN: 0148-0227

We present multipoint Time History of Events and Macroscale Interactions duringSubstorms (THEMIS) observations of transient dynamic pressure pulses in themagnetosheath 3–10 times the background in amplitude, due to enhancements in both theion density and velocity. Their spatial dimensions are of the order of 1 RE parallel tothe flow and 0.2–0.5 RE perpendicular to it, inferred from the difference in theamplitudes observed by the different spacecraft. For the first time, simultaneousobservations of the solar wind and foreshock are also shown, proving no similar dynamicpressure enhancements exist upstream of the bow shock and that the majority of pulsesare downstream of the quasi-parallel shock. By considering previously suggestedmechanisms for their generation, we show that the pressure pulses cannot be caused byreconnection, hot flow anomalies, or short, large-amplitude magnetic structures andthat at least some of the pressure pulses appear to be consistent with previoussimulations of solar wind discontinuities interacting with the bow shock. Thesesimulations predict large-amplitude pulses when the local geometry of the shock changesfrom quasi-perpendicular to quasi-parallel, while the opposite case should also producenotable pulses but typically of lower amplitude. Therefore, in a given region of themagnetosheath, some of the discontinuities in the solar wind should generate pressurepulses, whereas others are expected not to. There is also evidence that the pulses canimpinge upon the magnetopause, causing its motion.

Journal article

Harrison RA, Davies JA, Moestl C, Liu Y, Temmer M, Bisi MM, Eastwood JP, de Koning CA, Nitta N, Rollett T, Farrugia CJ, Forsyth RJ, Jackson BV, Jensen EA, Kilpua EKJ, Odstrcil D, Webb DFet al., 2012, AN ANALYSIS OF THE ORIGIN AND PROPAGATION OF THE MULTIPLE CORONAL MASS EJECTIONS OF 2010 AUGUST 1, ASTROPHYSICAL JOURNAL, Vol: 750, ISSN: 0004-637X

Journal article

Masters A, Eastwood JP, Swisdak M, Thomsen MF, Russell CT, Sergis N, Crary FJ, Dougherty MK, Coates AJ, Krimigis SMet al., 2012, The importance of plasma beta conditions for magnetic reconnection at Saturn's magnetopause, GEOPHYSICAL RESEARCH LETTERS, Vol: 39, ISSN: 0094-8276

Journal article

Temmer M, Vrsnak B, Rollett T, Bein B, de Koning CA, Liu Y, Bosman E, Davies JA, Moestl C, Zic T, Veronig AM, Bothmer V, Harrison R, Nitta N, Bisi M, Flor O, Eastwood J, Odstrcil D, Forsyth Ret al., 2012, CHARACTERISTICS OF KINEMATICS OF A CORONAL MASS EJECTION DURING THE 2010 AUGUST 1 CME-CME INTERACTION EVENT, ASTROPHYSICAL JOURNAL, Vol: 749, ISSN: 0004-637X

Journal article

Branduardi-Raymont G, Sembay SF, Eastwood JP, Sibeck DG, Abbey TA, Brown P, Carter JA, Carr CM, Forsyth C, Kataria D, Kemble S, Milan SE, Owen CJ, Peacocke L, Read AM, Coates AJ, Collier MR, Cowley SWH, Fazakerley AN, Fraser GW, Jones GH, Lallement R, Lester M, Porter FS, Yeoman TKet al., 2012, AXIOM: advanced X-ray imaging of the magnetosphere, EXPERIMENTAL ASTRONOMY, Vol: 33, Pages: 403-443, ISSN: 0922-6435

Journal article

Owen CJ, Amm O, Bruno R, De Keyser J, Dunlop MW, Eastwood JP, Fazakerley AN, Fontaine D, Forsyth C, Hasegawa H, Hellinger P, Hercik D, Jacquey C, Milan S, Raeder J, Sibeck DG, Stverak S, Travnicek P, Walsh AP, Wild JAet al., 2012, IMPALAS: Investigation of MagnetoPause Activity using Longitudinally-Aligned Satellites-a mission concept proposed for the ESA M3 2020/2022 launch, EXPERIMENTAL ASTRONOMY, Vol: 33, Pages: 365-401, ISSN: 0922-6435

Journal article

Sembay S, Branduardi-Raymont G, Eastwood JP, Sibeck DG, Abbey A, Brown P, Carter JA, Carr CM, Forsyth C, Kataria D, Kemble S, Milan S, Owen CJ, Read AM, Peacocke L, Arridge CS, Coates AJ, Collier MR, Cowley SWH, Fazakerley AN, Fraser G, Jones GH, Lallement R, Lester M, Porter FS, Yeoman Tet al., 2012, AXIOM: Advanced X-ray imaging of the magnetosheath, ASTRONOMISCHE NACHRICHTEN, Vol: 333, Pages: 388-392, ISSN: 0004-6337

Journal article

Eastwood JP, Videira JJH, Brain DA, Halekas JSet al., 2012, A chain of magnetic flux ropes in the magnetotail of Mars, GEOPHYSICAL RESEARCH LETTERS, Vol: 39, ISSN: 0094-8276

Journal article

Borg AL, Taylor MGGT, Eastwood JP, 2012, Electron pitch angle distribution during magnetic reconnection diffusion region observations in the Earth's magnetotail, ANNALES GEOPHYSICAE, Vol: 30, Pages: 109-117, ISSN: 0992-7689

Journal article

Taylor MGGT, Hasegawa H, Lavraud B, Phan T, Escoubet CP, Dunlop MW, Bogdanova YV, Borg AL, Volwerk M, Berchem J, Constantinescu OD, Eastwood JP, Masson A, Laakso H, Soucek J, Fazakerley AN, Frey HU, Panov EV, Shen C, Shi JK, Sibeck DG, Pu ZY, Wang J, Wild JAet al., 2012, Spatial distribution of rolled up Kelvin-Helmholtz vortices at Earth's dayside and flank magnetopause, ANNALES GEOPHYSICAE, Vol: 30, Pages: 1025-1035, ISSN: 0992-7689

Journal article

Borg AL, Taylor MGGT, Eastwood JP, 2012, Observations of magnetic flux ropes during magnetic reconnection in the Earth's magnetotail, ANNALES GEOPHYSICAE, Vol: 30, Pages: 761-773, ISSN: 0992-7689

Journal article

Sibeck DG, Angelopoulos V, Brain DA, Delory GT, Eastwood JP, Farrell WM, Grimm RE, Halekas JS, Hasegawa H, Hellinger P, Khurana KK, Lillis RJ, Oieroset M, Phan T-D, Raeder J, Russell CT, Schriver D, Slavin JA, Travnicek PM, Weygand JMet al., 2011, ARTEMIS Science Objectives, SPACE SCIENCE REVIEWS, Vol: 165, Pages: 59-91, ISSN: 0038-6308

Journal article

Teh W-L, Nakamura R, Sonnerup BUO, Eastwood JP, Volwerk M, Fazakerley AN, Baumjohann Wet al., 2011, Evidence of the origin of the Hall magnetic field for reconnection: Hall MHD reconstruction results from Cluster observations, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 116, ISSN: 0148-0227

Journal article

Oka M, Phan T-D, Eastwood JP, Angelopoulos V, Murphy NA, Oieroset M, Miyashita Y, Fujimoto M, McFadden J, Larson Det al., 2011, Magnetic reconnection X-line retreat associated with dipolarization of the Earth's magnetosphere, GEOPHYSICAL RESEARCH LETTERS, Vol: 38, ISSN: 0094-8276

Journal article

Oieroset M, Phan TD, Eastwood JP, Fujimoto M, Daughton W, Shay MA, Angelopoulos V, Mozer FS, McFadden JP, Larson DE, Glassmeier K-Het al., 2011, Direct Evidence for a Three-Dimensional Magnetic Flux Rope Flanked by Two Active Magnetic Reconnection X Lines at Earth's Magnetopause, PHYSICAL REVIEW LETTERS, Vol: 107, ISSN: 0031-9007

Journal article

Briggs JA, Brain DA, Cartwright ML, Eastwood JP, Halekas JSet al., 2011, A statistical study of flux ropes in the Martian magnetosphere, PLANETARY AND SPACE SCIENCE, Vol: 59, Pages: 1498-1505, ISSN: 0032-0633

Journal article

Phan TD, Love TE, Gosling JT, Paschmann G, Eastwood JP, Oieroset M, Angelopoulos V, McFadden JP, Larson D, Auster Uet al., 2011, Triggering of magnetic reconnection in a magnetosheath current sheet due to compression against the magnetopause, GEOPHYSICAL RESEARCH LETTERS, Vol: 38, ISSN: 0094-8276

Journal article

Eastwood JP, Schwartz SJ, Horbury TS, Carr CM, Glassmeier K-H, Richter I, Koenders C, Plaschke F, Wild JAet al., 2011, Transient Pc3 wave activity generated by a hot flow anomaly: Cluster, Rosetta, and ground-based observations, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 116, ISSN: 2169-9380

Journal article

Shay MA, Drake JF, Eastwood JP, Phan TDet al., 2011, Super-Alfvelnic Propagation of Substorm Reconnection Signatures and Poynting Flux, PHYSICAL REVIEW LETTERS, Vol: 107, ISSN: 0031-9007

Journal article

Lavraud B, Foullon C, Farrugia CJ, Eastwood JPet al., 2011, The Magnetopause, Its Boundary Layers and Pathways to the Magnetotail, The Dynamic Magnetosphere, Editors: Liu, Fujimoto, Publisher: Springer Verlag, Pages: 3-28, ISBN: 9789400705005

Book chapter

Halekas JS, Brain DA, Eastwood JP, 2011, Large-amplitude compressive "sawtooth" magnetic field oscillations in the Martian magnetosphere, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 116, ISSN: 0148-0227

Journal article

Dunlop MW, Zhang Q-H, Bogdanova YV, Lockwood M, Pu Z, Hasegawa H, Wang J, Taylor MGGT, Berchem J, Lavraud B, Eastwood J, Volwerk M, Shen C, Shi J-K, Constantinescu D, Frey H, Fazakerley AN, Sibeck D, Escoubet P, Wild JA, Liu Z-Xet al., 2011, Extended Magnetic Reconnection across the Dayside Magnetopause, PHYSICAL REVIEW LETTERS, Vol: 107, ISSN: 0031-9007

Journal article

Volwerk M, Berchem J, Bogdanova YV, Constantinescu OD, Dunlop MW, Eastwood JP, Escoubet P, Fazakerley AN, Frey H, Hasegawa H, Lavraud B, Panov EV, Shen C, Shi JK, Taylor MGGT, Wang J, Wild JA, Zhang QH, Amm O, Weygand JMet al., 2011, Interplanetary magnetic field rotations followed from L1 to the ground: the response of the Earth's magnetosphere as seen by multi-spacecraft and ground-based observations, ANNALES GEOPHYSICAE, Vol: 29, Pages: 1549-1569, ISSN: 0992-7689

Journal article

Fillingim MO, Eastwood JP, Parks GK, Angelopoulos V, Mann IR, Mende SB, Weatherwax ATet al., 2011, Polar UVI and THEMIS GMAG observations of the ionospheric response to a hot flow anomaly, JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, Vol: 73, Pages: 137-145, ISSN: 1364-6826

Journal article

Dunlop MW, Zhang Q-H, Bogdanova YV, Trattner KJ, Pu Z, Hasegawa H, Berchem J, Taylor MGGT, Volwerk M, Eastwood JP, Lavraud B, Shen C, Shi J-K, Wang J, Constantinescu D, Fazakerley AN, Frey H, Sibeck D, Escoubet P, Wild JA, Liu ZX, Carr Cet al., 2011, Magnetopause reconnection across wide local time, ANNALES GEOPHYSICAE, Vol: 29, Pages: 1683-1697, ISSN: 0992-7689

Journal article

Eastwood JP, Phan TD, Oieroset M, Shay MAet al., 2010, Average properties of the magnetic reconnection ion diffusion region in the Earth's magnetotail: The 2001-2005 Cluster observations and comparison with simulations, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 115, ISSN: 0148-0227

Journal article

Brain DA, Baker AH, Briggs J, Eastwood JP, Halekas JS, Phan T-Det al., 2010, Episodic detachment of Martian crustal magnetic fields leading to bulk atmospheric plasma escape, GEOPHYSICAL RESEARCH LETTERS, Vol: 37, ISSN: 0094-8276

Journal article

Omidi N, Eastwood JP, Sibeck DG, 2010, Foreshock bubbles and their global magnetospheric impacts, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 115, ISSN: 2169-9380

Journal article

Egedal J, Le A, Zhu Y, Daughton W, Oieroset M, Phan T, Lin RP, Eastwood JPet al., 2010, Cause of super-thermal electron heating during magnetotail reconnection, GEOPHYSICAL RESEARCH LETTERS, Vol: 37, ISSN: 0094-8276

Journal article

Eastwood JP, Shay MA, Phan TD, Oieroset Met al., 2010, Asymmetry of the Ion Diffusion Region Hall Electric and Magnetic Fields during Guide Field Reconnection: Observations and Comparison with Simulations, PHYSICAL REVIEW LETTERS, Vol: 104, ISSN: 0031-9007

Journal article

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