Magnetosphere Seminars

Below is a schedule of the informal LASP Friends of the Magnetosphere (FOM) Seminars for the Spring 2018 semester. 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 any interested persons are welcome to attend. For more information or if you have questions, please contact David.Malaspina at lasp.colorado.edu.

View the Address and Directions page for detailed directions to any of the LASP locations.

Current Schedule:

Current Schedule (expanded):

May
May
8

Jupiter’s Magnetosphere is *now* seen by Juno JADE

Speaker:  Rob Wilson [LASP]
Date & Time:  Tuesday, May 08, 2018 ,  3:30 pm
Location:  LASP Space Science Building, room N100 (1st floor)
Abstract:

The at-launch mission plan of Juno barely allowed for exploration of the Jovian middle/outer magnetosphere, with only a narrow sliver of local time coverage to ~40Rj. However that plan has since changed, resulting in wide coverage over the proposed mission of 33 science orbits. Juno has completed a dozen perijove passes so far, with superb… Read more »

May
May
1

An Update on NOAA Space Weather Prediction Capabilities and Challenges

Speaker:  Howard Singer [NOAA]
Date & Time:  Tuesday, May 01, 2018 ,  3:30 pm
Location:  LASP Space Science Building, room N100 (1st floor)
Abstract:

NOAA’s Space Weather Prediction Center (SWPC) is the nation’s official civilian source of space weather watches, warnings and alerts with a mission to “deliver space weather products and services that meet the evolving needs of the nation.” The scope of SWPC activities ranges from understanding the needs of those affected by space weather to the… Read more »

April
Apr
24

Whistler Mode Wave Propagation in the Magnetosphere and Effects of Plasma Density Structures

Speaker:  Mark Golkowski [CU/Denver]
Date & Time:  Tuesday, Apr 24, 2018 ,  3:30 pm
Location:  LASP Space Science Building, room N100 (1st floor)
Abstract:

Whistler mode waves are known to play an important role in radiation belt dynamics. Global models of radiation belt particle lifetimes based on quasilinear diffusion are effective tools if the location and occurrence of waves and distribution of energetic particles are known. Unfortunately, many aspects of whistler mode wave propagation are still not settled and… Read more »

April
Apr
17

The Magnetospheric Cusps: Signatures of Magnetic Reconnection

Speaker:  Karlheinz Trattner [LASP]
Date & Time:  Tuesday, Apr 17, 2018 ,  3:30 pm
Location:  LASP Space Science Building, room N100 (1st floor)
Abstract:

Reconnection at the Earth’s magnetopause is the mechanism by which magnetic fields in different regions change topology to create open magnetic field lines that allow energy and momentum to flow into the magnetosphere.  Processes that occur at the magnetopause will leave signatures in the precipitating ions observed in the cusp by polar orbiting satellites. Understanding… Read more »

April
Apr
10

Polar Cap Potential Saturation ­ Recent Progress and New Perspectives

Speaker:  Rick Wilder [LASP]
Date & Time:  Tuesday, Apr 10, 2018 ,  3:30 pm
Location:  LASP Space Science Building, room N100 (1st floor)
Abstract:

The electric field across Earth’s ionospheric polar cap, as well as the electrostatic potential drop, has been shown to have a non-linear response to increasingly southward interplanetary magnetic field (IMF). Several hypotheses have been put forth to explain the phenomenon of cross-polar cap potential (CPCP) saturation, typically involving a reduction of the reconnection rate at… Read more »

April
Apr
3

Physical simulations of the radiation belts

Speaker:  Scot Elkington [LASP]
Date & Time:  Tuesday, Apr 03, 2018 ,  3:30 pm
Location:  LASP Space Science Building, room N100 (1st floor)
Abstract:

Models of the radiation belts can be broadly categorized as physically-based, relying on understanding of the underlying interactions of energetic particles with the fields and waves guiding their dynamics; and empirical models, centered around long-term observations of the configuration and evolution of the belts. Of physical models, common approaches include test particle methods, whereby insight… Read more »

March
Mar
27

** CU spring break ** No seminar

Speaker:  n/a
Date & Time:  Tuesday, Mar 27, 2018 ,  n/a
Location:  n/a
Abstract:
March
Mar
20

A 4D Model of the Io Plasma Torus

Speaker:  Parker Hinton [LASP]
Date & Time:  Tuesday, Mar 20, 2018 ,  3:30 pm
Location:  LASP Space Science Building, room N100 (1st floor)
Abstract:

Jupiter’s moon Io volcanically outgasses roughly 1000kg/s of neutral atoms that, through various ionization mechanisms, end up as plasma in Jupiter’s magnetosphere. This plasma then becomes distributed along magnetic field lines and assumes an overall toroidal structure. We use a diffusive equilibrium model to quantify the structure of the Io plasma torus (IPT). The different… Read more »

March
Mar
13

Geomagnetic Field Models for Research and Operational Users

Speaker:  Arnaud Chulliat [NOAA]
Date & Time:  Tuesday, Mar 13, 2018 ,  3:30 pm
Location:  LASP Space Science Building, room N100 (1st floor)
Abstract:

The Geomagnetism Group at CIRES and NOAA National Centers for Environmental Information develops models of the various sources of the Earth’s magnetic field, from fluid flows in the outer core to electric currents in the magnetosphere. The main emphasis of this research is on empirical models that can be used in navigation and positioning applications… Read more »

March
Mar
6

Beam-plasma interactions and Langmuir turbulence in the earth ionosphere

Speaker:  Hassan Akbari [LASP]
Date & Time:  Tuesday, Mar 06, 2018 ,  3:30 pm
Location:  LASP Space Science Building, room N100 (1st floor)
Abstract:

Langmuir turbulence, arguably one of the most discussed regimes of nonlinear plasma turbulence, is known to occur in a vast range of plasmas; from laboratory to a variety of space and astrophysical plasmas including pulsar magnetospheres, the solar wind, and planetary foreshocks and ionospheres. In the recent years Langmuir turbulence has been detected in the… Read more »

February
Feb
27

Precipitation Loss of Radiation Belt Electrons Observed by LEO Satellites and Balloons

Speaker:  Kun Zhang [LASP]
Date & Time:  Tuesday, Feb 27, 2018 ,  3:30 pm
Location:  LASP Space Science Building, room N100 (1st floor)
Abstract:

An important radiation belt electron loss process is precipitation into the Earth’s atmosphere. The precipitation processes can be further categorized into individual fast precipitation events (bounce loss cone) and relatively slow and steady precipitation loss (drift loss cone). Analysis and quantification of both types of precipitation are essential to understanding the role that precipitation loss… Read more »

February
Feb
20

Atmospheric Signatures and Diagnostics of Radiation Belt Electron Precipitation

Speaker:  Bob Marshall [CU/Aerospace]
Date & Time:  Tuesday, Feb 20, 2018 ,  3:30 pm
Location:  LASP Space Science Building, room N100 (1st floor)
Abstract:

Precipitation of Radiation Belt particles in the upper atmosphere is one of the key loss mechanisms for radiation belt fluxes. Currently, uncertainties in the theoretical precipitation loss rates lead to large discrepancy in electron lifetimes used in radiation belt models; loss rates or lifetimes used in current research vary by an order of magnitude. Observation… Read more »

February
Feb
13

MAVEN observations of solar wind driven magnetosonic waves heating the Martian dayside ionosphere

Speaker:  Chris Fowler [LASP]
Date & Time:  Tuesday, Feb 13, 2018 ,  3:30 pm
Location:  LASP Space Science Building, room N100 (1st floor)
Abstract:

The nature of the solar wind interaction with unmagnetized bodies can be very different to that at magnetized planets such as Earth. At unmagnetized bodies, the lack of a significant, global dipole magnetic field typically leads to an induced magnetosphere forming at the body. The solar wind stand-off distance is subsequently usually located much closer… Read more »

February
Feb
6

Vlasiator simulations of near-Earth space

Speaker:  Sanni Hoilijoki [New to LASP]
Date & Time:  Tuesday, Feb 06, 2018 ,  3:30 pm
Location:  LASP Space Science Building, room N100 (1st floor)
Abstract:

Vlasiator is a global hybrid-Vlasov simulation code developed for modeling the terrestrial magnetosphere. In Vlasiator, ions are described as velocity distribution functions, whereas electrons are treated as charge-neutralizing massless fluid. Vlasiator is able to solve the local ion physics in a global context. However, this makes the simulations computationally heavy. Therefore, the global simulations are… Read more »

January
Jan
30

SWx TREC: Space Weather at Low Earth Orbit, What a Drag

Speaker:  Jeff Thayer [CU/Aerospace]
Date & Time:  Tuesday, Jan 30, 2018 ,  3:30 pm
Location:  LASP Space Science Building, room W205 (glass room)
Abstract:

A new CU Grand Challenge initiative has been approved in the field of space weather called the Space Weather Technology, Research, and Education Center (SWx TREC). This seminar will briefly describe this new CU initiative while focusing on the first SWx TREC research thrust addressing space weather at low earth orbit. The increasing congestion of… Read more »

January
Jan
23

An adolescent Hot Flow Anomaly under the MMS microscope

Speaker:  Steve Schwartz [New to LASP]
Date & Time:  Tuesday, Jan 23, 2018 ,  3:30 pm
Location:  LASP Space Science Building, room N100 (1st floor)
Abstract:

Hot Flow Anomalies (HFAs) are transient explosive events observed near the Earth’s bow shock. They are associated with the passage of thin interplanetary current sheets that track sufficiently slowly across the bow shock surface to interrupt the cocktail of kinetic processes that mediate the shock physics under collisionless conditions. Under steady conditions, the bow shock… Read more »

January
Jan
16

Generation and Micro-scale Effects of Electrostatic Waves in an Oblique Shock Crossing

Speaker:  Katy Goodrich [LASP]
Date & Time:  Tuesday, Jan 16, 2018 ,  3:30 pm
Location:  LASP Space Science Building, room N100 (1st floor)
Abstract:

We present an analysis of large amplitude (>100 mV/m) electrostatic waves observed by MMS during an oblique bow shock crossing. The observed waves primarily consist of electrostatic solitary waves (ESWs), ion acoustic waves (IAWs), and electron Bernstein waves (EBWs). ESWs typically include nonlinear structures such as double layers, ion phase-space holes, electron phase-space holes. All… Read more »