Space Physics Seminar - spring-2017
Magnetosonic waves
April 7, 2017
3:30 p.m. - 5 p.m.
Geology 6704
Presented By:
- Jinxing Li - UCLA
Subscribe to Calendar
Magnetosonic waves: fascinating spectral structures and importance to radiation belt electron dynamics
The fast magnetosonic waves are fascinating because they exhibit many kinds of structures in spectrum. Despite the harmonic structures and the rising-tone structures, we report a new form of “zipper-like” magnetosonic waves consisting of two bands of interleaved periodic rising-tone spectra observed by multiple missions. The two discrete bands are distinct in frequency and intensity, however, they maintain the same periodicity which varies in space and time, suggesting a nonlinear excitation or modulation mechanism which still remains to be fully understood. Strong magnetosonic waves were observed in the same region and at the same time periods as the radiation belt electron butterfly distributions, and as the magnetosonic waves expand in space, the butterfly distributions extend to the same region. Our simulations successfully reproduced the formation of electron butterfly distributions, which result from parallel acceleration caused by Landau resonant interaction. Multi-case studies show that magnetosonic waves can create electron butterfly distributions at energies from ~100 keV to multi-MeV, in a wide spatial range (L=1.2-4.8) of the radiation belts.
Space weather as a complex system
April 14, 2017
3:30 p.m. - 5 p.m.
Geology 6704
Presented By:
- Ryan McGranaghan - CPAESS
Subscribe to Calendar
Space weather as a complex system
Improving understanding of magnetosphere-ionosphere coupling in the age of assimilation and data science
Flux Transfer Events: Force Balance and Dynamics
April 21, 2017
3:30 p.m. - 4:30 p.m.
Geology 6704
Presented By:
- Cong Zhao - EPSS/UCLA
Subscribe to Calendar
Seminar Description coming soon.
The Solar Wind Interaction with Ceres
April 28, 2017
3:30 p.m. - 5 p.m.
Geology 6704
Presented By:
- Michaela Villarreal - UCLA
Subscribe to Calendar
The Solar Wind Interaction with Ceres
The Low Beta Magnetopause // History of Venus Lightning
May 5, 2017
3:30 p.m. - 5 p.m.
Geology 6704
Presented By:
- Yi Qi - UCLA
- Ricky Hart - UCLA
Subscribe to Calendar
The Low Beta Magnetopause - Yi Qi
History of Venus Lightning - Ricky Hart
Which Ohm’s Law to use for Magnetic Structures in Space Plasmas
May 12, 2017
3:30 p.m. - 5 p.m.
Geology 6704
Presented By:
- Richard Sydora - University of Alberta, Canada
Subscribe to Calendar
Which Ohm’s Law to use for Magnetic Structures in Space Plasmas
Space Physics Seminar
May 19, 2017
3:30 p.m. - 5 p.m.
Geology 6704
Presented By:
- Terry Z. Liu - UCLA
- Xu Zhang - UCLA
Subscribe to Calendar
- Terry Z. Liu: Particle acceleration by Foreshock Transients
- Xu Zhang: Off-equatorial current-driven instabilities ahead of approaching dipolarization fronts
3D Global Hybrid Simulations of Magnetotail Current Sheet and its Dawn-Dusk Asymmetry
May 26, 2017
3:30 p.m. - 5 p.m.
Geology 6704
Presented By:
- San Lu - UCLA
Subscribe to Calendar
3D Global Hybrid Simulations of Magnetotail Current Sheet and its Dawn-Dusk Asymmetry
The May 1967 Great Storm and Radio Disruption Event: A 50 year Retrospective
June 2, 2017
3:30 p.m. - 5 p.m.
Geology 6704
Presented By:
See Event on Google.Subscribe to Calendar
The May 1967 Great Storm and Radio Disruption Event: A 50 year Retrospective
Loss of Relativistic and Ultra Relativistic Electrons
June 9, 2017
3:30 p.m. - 5 p.m.
Geology 6704
Presented By:
- Yuri Shprits - UCLA
Subscribe to Calendar