Illustration of Sun-Earth connection. When CME's blast through the Sun's outer atmosphere and plow toward Earth at speeds of thousands of miles per second, the resulting effects can be harmful to communication satellites and astronauts outside the Earth's magnetosphere. On the ground, the magnetic storm wrought by these solar particles can knock out electric power. (Courtesy Steele Hill/NASA)
Below is a schedule of the informal LASP Magnetospheres Seminars for the Fall 2009 Semester. Except where noted, seminars will be held on Tuesday afternoons in room LSTB-206 at 3:30 pm.
LASP holds a series of informal seminars focused on space physics and plasma research relating to the magnetospheres of Earth and other planets. The intended audience is space and planetary physics researchers in the Boulder area, although in most instances any interested persons are welcome to attend.
For more information or if you have questions, please contact:
- Stefan Eriksson at (email:
firstname.lastname@lasp.colorado.edu)
Fall Semester 2009 Schedule:
| August 25, 2010 |
A fast regime of reconnection in high Lundquist number plasmas |
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| Speaker: | Giovanni Lapenta KU Leuven, Belgium | |
| Time: | 4:00-5:00 p.m., refreshments served at 3:45 p.m. | |
| Location: | LSTB-206 | |
| Abstract: | ||
| September 8, 2009 |
Observations of double layers in Earth’s plasma sheet |
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| Speaker: | Bob Ergun (LASP) | |
| Time: | 4:00-5:00 p.m., refreshments served at 3:45 p.m. | |
| Location: | LSTB-206 | |
| Abstract: |
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| September 15, 2009 |
Movie-maps of low-latitude storm-time magnetic disturbance |
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| Speaker: | Jeffrey Love (USGS) | |
| Time: | 4:00-5:00 p.m., refreshments served at 3:45 p.m. | |
| Location: | LSTB-206 | |
| Abstract: |
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| September 22, 2009 |
A one-sided aspect of Alfvenic fluctuations in the solar wind |
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| Speaker: | Jack Gosling (LASP) | |
| Time: | 4:00-5:00 p.m., refreshments served at 3:45 p.m. | |
| Location: | LSTB-206 | |
| Abstract: |
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| September 29, 2009 |
Assimilative modeling of large-scale equatorial plasma trenches observed by the Communication/Navigation Forecasting System (C/NOFS) |
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| Speaker: | Yi-Jiun Su (AFRL) | |
| Time: | 4:00-5:00 p.m., refreshments served at 3:45 p.m. | |
| Location: | LSTB-206 | |
| Abstract: |
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| October 6, 2009 |
THEMIS observation of ULF waves in the inner magnetosphere |
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| Speaker: | Wenlong Liu (LASP) | |
| Time: | 4:00-5:00 p.m., refreshments served at 3:45 p.m. | |
| Location: | LSTB-206 | |
| Abstract: |
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| October 8, 2009 |
Diffuse, monoenergetic, broadband (wave) and ion aurora:
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| Speaker: | Patrick Newell (JHU/APL) | |
| Time: | 4:00-5:00 p.m., refreshments served at 3:45 p.m. | |
| Location: | LSTB-206 | |
| Abstract: |
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| October 13, 2009 |
Measurement of high frequency density turbulence in the solar wind |
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| Speaker: | David Malaspina (LASP) | |
| Time: | 4:00-5:00 p.m., refreshments served at 3:45 p.m. | |
| Location: | LSTB-206 | |
| Abstract: |
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| October 20, 2009 |
Quantification of the precipitation loss of radiation belt electrons observed by SAMPEX |
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| Speaker: | Weichao Tu (LASP) | |
| Time: | 4:00-5:00 p.m., refreshments served at 3:45 p.m. | |
| Location: | LSTB-206 | |
| Abstract: | Based on SAMPEX/PET observations, the rates and the spatial and temporal variations of electron loss to the atmosphere in the Earth’s radiation belt were quantified using a Drift-Diffusion model that includes the effects of azimuthal drifts and pitch angle diffusion. The measured electrons by SAMPEX can be distinguished as trapped, quasi-trapped (in the drift loss cone), and precipitating (in the bounce loss cone). The Drift-Diffusion model simulates the low-altitude electron distribution from SAMPEX. After fitting the model results to the data, the magnitudes and variations of the electron lifetime can be quantitatively determined based on the optimum model parameter values. Three magnetic storms of different magnitudes were selected to estimate the various loss rates of ~0.5 to 3 MeV electrons during different phases of the storm and at L shells ranging from L=3.5 to L=6.5 (L represents the radial distance in the equatorial plane under a dipole field approximation). They are a small storm and a moderate storm in the current solar minimum and an intense storm right after the previous solar maximum. Model results for the three individual events showed that fast precipitation losses of relativistic electrons, as short as hours, persistently occurred in the storm main phases and with more efficient loss at higher energies, over wide range of L regions and over all the SAMPEX covered local times. In addition to this newly discovered common feature of the main phase electron loss for all the storm events and at all L locations, some other properties of the electron loss rates that vary with time or locations, were also estimated and discussed. This method combining model with the low-altitude observations provides direct quantification of the electron loss rate, a prerequisite for any comprehensive modeling of the radiation belt electron dynamics. | |
| October 27, 2009 |
From satellite-magnetosphere interaction to auroral emissions:
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| Speaker: | Sebastien Hess (LASP) | |
| Time: | 4:00-5:00 p.m., refreshments served at 3:45 p.m. | |
| Location: | LSTB-206 | |
| Abstract: |
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| November 3, 2009 |
Ground-based observations of Jupiter’s H3+ infrared aurora |
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| Speaker: | Makenzie Lystrup (LASP) | |
| Time: | 4:00-5:00 p.m., refreshments served at 3:45 p.m. | |
| Location: | LSTB-206 | |
| Abstract: |
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| November 10, 2009 |
THEMIS observation of reconnection-associated Hall field at the magnetopause: First results from Hall MHD-based reconstruction |
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| Speaker: | Wai-Leong Teh (LASP) | |
| Time: | 4:00-5:00 p.m., refreshments served at 3:45 p.m. | |
| Location: | LSTB-206 | |
| Abstract: |
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| November 17, 2009 |
Flickering aurora studies using high speed cameras |
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| Speaker: | Matthew McHarg (USAF Academy) | |
| Time: | 4:00-5:00 p.m., refreshments served at 3:45 p.m. | |
| Location: | LSTB-206 | |
| Abstract: |
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| November 24, 2009 |
NO SEMINAR |
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| Speaker: | N/A | |
| Time: | 4:00-5:00 p.m., refreshments served at 3:45 p.m. | |
| Location: | LSTB-206 | |
| Abstract: |
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| December 1, 2009 |
First reconnecting flux tubes |
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| Speaker: | Laila Andersson (LASP) | |
| Time: | 4:00-5:00 p.m., refreshments served at 3:45 p.m. | |
| Location: | LSTB-206 | |
| Abstract: |
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| December 8, 2009 |
Fall AGU practice |
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| Speaker: | N/A | |
| Time: | 4:00-5:00 p.m., refreshments served at 3:45 p.m. | |
| Location: | LSTB-206 | |
| Abstract: |
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| December 15, 2009 |
Fall AGU meeting |
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| Speaker: | N/A | |
| Time: | 4:00-5:00 p.m., refreshments served at 3:45 p.m. | |
| Location: | LSTB-206 | |
| Abstract: |
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