Alfred J. Bedard, Jr.
Natl. Oceanic and Atmospheric Admin., Wave Propagation Lab., 325 Broadway, Boulder, CO 80303
Recent measurements of naturally occurring atmospheric sound waves near 1 Hz indicate potential uses for monitoring and studying a variety of geophysical processes including avalanches, atmospheric turbulence, severe weather, and earthquakes. A review presents typical signal characteristics including spectral content, showing clear differences between signals from various sources. Possible generation mechanisms are discussed in the context of these data and possible potential practical uses indicated.