Innovative Approaches to Planetary Seismology

March 15-19, 2010
California Institute of Technology - Pasadena, CA 91125

Workshop Overview:

Seismology is the method of choice for understanding planetary structure and has had enormous success for Earth. It is seldom employed for other bodies thus far because of the technical challenges, even when the body has a solid surface. In some case (e.g., detection of normal modes for giant planets) there are serious doubts about feasibility, given likely signal strengths, except for the case of excitation by impacting bodies. The scientific pay-off is potentially so enormous that one should make an effort to assess all possible approaches, even though the challenges are great. The goal of this study is to bring together a group of scientists and engineers and brainstorm the problem.

The mix of people will include those who have thought about the plausible signal strengths and what detection might tell us about the interior of planets. It will also include those who have thought about the technology challenges, e.g., use of balloons or sensitive gravity measurements or Fourier spectrometry (developed primarily in France).

It will be a forum for ongoing work in related areas (e.g Earth atmosphere and ocean excitations that couple to the interior.) It will also be sufficiently broad in scope to include consideration of approaches that are geodetic or tidal or magnetic (related to seismological approaches through the common theme of seeking to detect those changes in the planet that are on relatively short timescales but are probes of interior structure). The outcome of the program will be a critical assessment of whether there are new directions to develop, or existing directions in need of technological impetus.

Workshop Participants:

  • Bruce Banerdt - JPL
  • William Folkner - JPL
  • Patrick Gaulme - IAS
  • Laurent Gizon - Max Planck Institute for Solar System Research
  • Mark Hofstadter - JPL
  • Kenneth Hurst - JPL
  • Jennifer Jackson - Caltech
  • Hiroo Kanamori - Caltech
  • Sharon Kedar - JPL
  • Philippe Lognonné - Institut de Physique du Globe de Paris (IPGP)
  • Giuseppe Mitri - Caltech
  • Neil Murphy - JPL
  • Giovanni Occhipinti - Institut de Physique du Globe de Paris (IPGP)
  • Barbara Romanowicz - UC Berkeley
  • Kunio M. Sayanagi - Caltech
  • Francois-Xavier Schmider - Université de Nice
  • Jerry Schubert - UCLA
  • Christophe Sotin - JPL
  • Dave Stevenson - Caltech
  • Victor Tsai - U.S. Geological Survey
  • Frank Webb - JPL
  • Aaron Wolf - Caltech

Workshop Presentations

Giant Planets Group

Giant Planet Summary

Ken Hurst

Strain Seismometers and Radar
GESS, A 20 Year Plan to Enable Earthquake Prediction

Hiroo Kanamori

Excitation of Internal Gravity Wave (IGW)

Neil Murphy

Helio- & Jovi-seismology Doppler (and for the sun magnetic) imaging

Giovanni Occhipinti
Institut de Physique du Globe de Paris (IPGP)

Earthquakes & Tsunamis flirting with the Ionosphere …take a ride to Venus !!

Barbara Romanowicz
UC Berkeley

Planetary Seismology: Inspirations from Recent Earth Studies

Francois-Xavier Schmider
Université de Nice

Doppler Spectro Imager

Jerry Schubert

Tropospheric & Deep Models

Victor Tsai

Noise Tomography Concerns for Planetary Application