1. Infrasound in the Geosciences Henry E. Bass, Carrick Talmadge, and Kenneth Gilbert, National Center For Physical Acoustics, University of Mississippi Michael Hedlin, Gerald D’Spain, and Jon Berger, Scripps Institution of Oceanography, University of California San Diego Milton Garces and Claus Hetzer, ISLA, University of Hawaii John V. Olson, Charles Wilson, Curt Szuberla and Daniel Osborne, University of Alaska at Fairbanks Paul Golden and Gene Herrin, Southern Methodist University Richard Kromer and Pres Herrington, Sandia National Laboratory Rod Whitaker and Doug Revelle, Los Alamos National Laboratory Keith McLaughlin, Joydeep Bhattacharyya, Bob Woodward and Bob North, SMDC Monitoring Research, Arlington, VA David Norris and Rob Gibson, BBN Technologies, Arlington, VA

2. What does the infrasound community bring GEOSS? Existing Arrays of Sensors Growing Library of Signatures Improved Understanding of Propagation/Met Ability to Confirm/Broaden Understanding of Events.

3. Available Infrasound Stations

4. IMS Sites

5. Library of Signatures - Littoral Processes

6. Severe Weather Microbaroms allow storm tracking with infrasound

7. Electromagnetic Activity Sprites, Aurora source at 90 km height Liszka, 2001: Sprites in Sweden May 26/27, 1995

8. Bolides April 23, 2001 ~10kt

9. Turbulence and Atmospheric Waves Clear air turbulence monitoring Lower, middle and upper atmosphere dynamics

10. Improved Understanding of Infrasonic Wave Propagation Progress in integration of required environmental information for modeling – further work required to resolve outstanding issues such as: observed errors in azimuth phase identification scattering and diffraction Final goal of an operational full modeling capability (waveforms, travel times, phase velocities, amplitudes) Use of infrasound for tomography

11. Example - Volcanic Signals

12. Acoustic Surveillance for Hazardous Eruptions (ASHE) In Cooperation with the Geological Survey of Canada and Instituto Geofisico, Quito Small arrays to be installed north of Quito and near Tundarahua. Data forwarded to Ottawa and Washington Area VAAC. Results ready in 2007.

13. Example - Tsunami Source Location

14. Example: Columbia Tragedy Altitude (km) Trajectory in white Arrays in red CPA’s in yellow

15. How do we build and maintain the core Deploy infrasound arrays with seismometers where value is to be added – arrays add value. Maintain portable infrasound equipment available for deployment. Contribute to a common data base. Document major events detected by multiple sensors – WSMR Experiments

16. Geophysical Events Ground Truth Event Database is growing: SMDC Data Center Some sources are poorly characterized Subset of CMR GT Database

17. The End