Researchers from the University of Utah have recently published two new articles in the journal
In addition to a full description of the characteristics of a pool of aftershocks in the article described as the largest and deepest of the earthquake, which had an unusual volumetric (explosive) behavior, consistent with the movement of the fluid from the depths to the surface hydrothermal systems (depth of less than 6.5 km and 5 km).
In addition, a careful analysis of the overlapping sequences
A similar behavior was inherent in the very large pool of tremors in Yellowstone in 1985 in the western part of the Yellowstone Plateau, and may be even more similar than is commonly believed.
The authors suggest the possibility that this style of behavior is the key to understanding the hydrothermal explosions, large earthquakes and even volcanic eruptions.
The second article is written by Wu-Lung Chang (Wu-Lung Chang), associate professor of the Central National Taiwan University and Research Associate at the University of Utah and colleagues from the University of Utah. It discusses the temporal properties of the accelerated uplift of the caldera in 2004-2010, and drew attention to the period
As in their previous work, the authors simulated the rising and have come to the conclusion that it was caused by the horizontal extension of the volcanic bed near the top of the subsurface (7-10 km) Magma pocket.
In the new paper, the authors conclude that, since 2006, the nature of soil deformation revealed a time delay rises, decreasing from south-east to north-west through the caldera.
Such a move could be due to smaller volumes of magma deep podpitok and the fluid pressure or release of Yellowstone Lake, relating to 2008 and the recent tremors pools (2010) on the plateau of Madison.
List of references:
· Chang, W., RB Smith, C. Wicks, C. Puskas, and J. Farrell, 2007, Accelerated uplift and source models of the Yellowstone caldera, 2004-2006, From GPS and InSAR observations, Science 9 November 2007: Vol. 318. no. 5852, pp. 952 — 956 DOI: 10.1126/science.1146842.
· Chang, W. -L., Smith, RB, Farrell, J., and Puskas, CM, 2010, An extraordinary episode of Yellowstone caldera uplift, 2004-2010, from GPS and InSAR observations: Geophysical Research Letters, v. 37, L23302, doi: 10.1029/2010GL045451.
· Farrell, J., Smith, RB, Taira, T., Chang, W. -L., And Puskas, CM, 2010, Dynamics and rapid migration of the energetic 2008-2009 Yellowstone Lake earthquake swarm: Geophys. Res. Lett., 37, L19305, doi: 10.1029/2010GL044605.
· Waite, GR and Smith, RB, 2002, Seismic evidence for fluid migration accompanying subsidence of the Yellowstone Caldera: Journal of Geophysical Research, v. 107, no. B9, p. 2177, 10.1029/2001JB000586.