Earthquake Dynamics

Seismic noise reveals volcanic plumbing

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Science  04 Jul 2014:
Vol. 345, Issue 6192, pp. 42-44
DOI: 10.1126/science.345.6192.42-o

Monitoring the way in which seismic noise passes through Earth's crust after a large earthquake can clarify how volcanoes erupt. Japan has the highest-density seismic network in the world. Brenguier et al. observed reductions in seismic velocity below volcanic regions of Japan from before, to the weeks and months after the 2011 Tohoku-Oki earthquake (see the Perspective by Prejean and Haney). This indicates that pressurized fluids below volcanoes can weaken in response to dynamic stress perturbations.

Science, this issue p. 80; see also p. 39

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