Physical Sciences and Mathematics Commons^™

The Duration-Amplitude Distribution Of Volcanic Tremor, John P. Benoit, Stephen R. Mcnutt, Vilma Barboza

School of Geosciences Faculty and Staff Publications

The duration-amplitude distribution of volcanic tremor was examined in eight volcanoes and one geothermal area. An exponential model, implying a scale-bound source process, is found to be a better fit to the data than a power law (scale invariant) model. The exponential model well describes tremor associated with magmatic and phreatic eruptions, shallow and deep source regions, and geothermal sources. We tested the exponential model described by: , where d is the duration of tremor greater than or equal to a particular amplitude D_R, d_t is the total duration of tremor, and the inverse of λ is …