How a small noise generates large-amplitude oscillations of volcanic plug and provides high seismicity / Alexandrov Dmitri V.,Bashkirtseva Irina A.,Ryashko Lev B. // EUROPEAN PHYSICAL JOURNAL B. - 2015. - V. 88, l. 4.

ISSN/EISSN:

1434-6028 / 1434-6036

Type:

Article

Abstract:

A non-linear behavior of dynamic model of the magma-plug system under the action of N-shaped friction force and stochastic disturbances is studied. It is shown that the deterministic dynamics essentially depends on the mutual arrangement of an equilibrium point and the friction force branches. Variations of this arrangement imply bifurcations, birth and disappearance of stable limit cycles, changes of the stability of equilibria, system transformations between mono-and bistable regimes. A slope of the right increasing branch of the friction function is responsible for the formation of such regimes. In a bistable zone, the noise generates transitions between small and large amplitude stochastic oscillations. In a monostable zone with single stable equilibrium, a new dynamic phenomenon of noise-induced generation of large amplitude stochastic oscillations in the plug rate and pressure is revealed. A beat-type dynamics of the plug displacement under the influence of stochastic forcing is studied as well.

Author keywords:

LAVA DOME ERUPTIONS; MOUNT ST-HELENS; SILICIC VOLCANOS; DYNAMICS; EXTRUSION; MODEL; BEHAVIOR

DOI:

10.1140/epjb/e2015-60130-6

Web of Science ID:

ISI:000353065100003

Соавторы в МНС:

Другие поля

Поле	Значение
Month	APR 20
Publisher	SPRINGER
Address	233 SPRING ST, NEW YORK, NY 10013 USA
Language	English
Article-Number	106
EISSN	1434-6036
Keywords-Plus	LAVA DOME ERUPTIONS; MOUNT ST-HELENS; SILICIC VOLCANOS; DYNAMICS; EXTRUSION; MODEL; BEHAVIOR
Research-Areas	Physics
Web-of-Science-Categories	Physics, Condensed Matter
Author-Email	Dmitri.Alexandrov@usu.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	35
Usage-Count-Since-2013	4
Journal-ISO	Eur. Phys. J. B
Doc-Delivery-Number	CG1WC