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Science, 2006•science.org
References and Notes 1. D. Patanè, G. Barberi, O. Cocina, P. De Gori, C. Chiarabba,
Science 313, 821 (2006). 2. The compressional and shear waves are the fastest and second-
fastest waves to be radiated from an earthquake source, so they arrive first and second on
seismograms. Their ratio provides information about pressure and about the presence of
gas and liquid in the study volume. Thus, changes in their ratio can tell us about changes in
pressure and gas/liquid, which are thought to accompany the buildup and occurrence of a …
Science 313, 821 (2006). 2. The compressional and shear waves are the fastest and second-
fastest waves to be radiated from an earthquake source, so they arrive first and second on
seismograms. Their ratio provides information about pressure and about the presence of
gas and liquid in the study volume. Thus, changes in their ratio can tell us about changes in
pressure and gas/liquid, which are thought to accompany the buildup and occurrence of a …
References and Notes 1. D. Patanè, G. Barberi, O. Cocina, P. De Gori, C. Chiarabba, Science 313, 821 (2006). 2. The compressional and shear waves are the fastest and second-fastest waves to be radiated from an earthquake source, so they arrive first and second on seismograms. Their ratio provides information about pressure and about the presence of gas and liquid in the study volume. Thus, changes in their ratio can tell us about changes in pressure and gas/liquid, which are thought to accompany the buildup and occurrence of a volcanic eruption. 3. GR Foulger, CC Grant, A. Ross, BR Julian, Geophys. Res. Lett. 24, 135 (1997).
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