Analysis of stochastic model for nonlinear volcanic dynamics / Alexandrov D. V.,Bashkirtseva I. A.,Ryashko L. B. // NONLINEAR PROCESSES IN GEOPHYSICS. - 2015. - V. 22, l. 2. - P. 197-204.

ISSN/EISSN:

1023-5809 / нет данных

Type:

Article

Abstract:

Motivated by important geophysical applications we consider a dynamic model of the magma-plug system previously derived by Iverson et al. (2006) under the influence of stochastic forcing. Due to strong nonlinearity of the friction force for a solid plug along its margins, the initial deterministic system exhibits impulsive oscillations. Two types of dynamic behavior of the system under the influence of the parametric stochastic forcing have been found: random trajectories are scattered on both sides of the deterministic cycle or grouped on its internal side only. It is shown that dispersions are highly inhomogeneous along cycles in the presence of noises. The effects of noise-induced shifts, pressure stabilization and localization of random trajectories have been revealed by increasing the noise intensity. The plug velocity, pressure and displacement are highly dependent of noise intensity as well. These new stochastic phenomena are related to the nonlinear peculiarities of the deterministic phase portrait. It is demonstrated that the repetitive stick-slip motions of the magma-plug system in the case of stochastic forcing can be connected with drumbeat earthquakes.

Author keywords:

LAVA DOME ERUPTIONS; SILICIC VOLCANOS; EXTRUSION; BEHAVIOR; NOISE

DOI:

10.5194/npg-22-197-2015

Web of Science ID:

ISI:000352485800008

Соавторы в МНС:

Другие поля

Поле	Значение
Publisher	COPERNICUS GESELLSCHAFT MBH
Address	BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
Language	English
Keywords-Plus	LAVA DOME ERUPTIONS; SILICIC VOLCANOS; EXTRUSION; BEHAVIOR; NOISE
Research-Areas	Geochemistry \& Geophysics; Meteorology \& Atmospheric Sciences
Web-of-Science-Categories	Geochemistry \& Geophysics; Meteorology \& Atmospheric Sciences
Author-Email	lev.ryashko@urfu.ru
ResearcherID-Numbers	Alexandrov, Dmitri/D-2516-2016
ORCID-Numbers	Alexandrov, Dmitri/0000-0002-6628-745X
Funding-Acknowledgement	Ministry of Education and Science of the Russian Federation {[}315]
Funding-Text	This work was supported by the Ministry of Education and Science of the Russian Federation under the project no. 315.
Number-of-Cited-References	25
Usage-Count-Since-2013	5
Journal-ISO	Nonlinear Process Geophys.
Doc-Delivery-Number	CF3YU