Noise-induced variability of volcanic extrusions / Alexandrov D. V.,Bashkirtseva I. A.,Ryashko L. B. // EPL. - 2016. - V. 116, l. 4.

ISSN/EISSN:

0295-5075 / 1286-4854

Type:

Article

Abstract:

Motivated by important physical applications, we study a non linear dynamics of volcanic extrusions on the basis of a simple pressure mass flow model. We demonstrate that the deterministic phase portrait represents either the bulbous type curves or closed paths stretched to their left depending on the initial conditions. The period of phase trajectories therewith increases when the pressure drop between the conduit top and bottom compensates the lava column pressure in it. Stochastic forcing changes the system dynamics drastically. We show that a repetitive scenario of volcanic behaviour with intermittency of stochastic oscillations of different extrusion amplitudes and frequencies appears in the presence of noises. As this takes place, the mean values of interspike intervals characterizing the system periodicity have a tendency to grow with increasing the noise intensity. The probability distribution functions confirming this dynamic behaviour are constructed. Copyright (C) EPLA, 2016

Author keywords:

SOUFRIERE-HILLS-VOLCANO; DYNAMICS; SLIP; MONTSERRAT; SYSTEM; MODEL

DOI:

10.1209/0295-5075/116/40006

Web of Science ID:

ISI:000392961200006

Соавторы в МНС:

Другие поля

Поле	Значение
Month	NOV
Publisher	EPL ASSOCIATION, EUROPEAN PHYSICAL SOCIETY
Address	6 RUE DES FRERES LUMIERE, MULHOUSE, 68200, FRANCE
Language	English
Article-Number	40006
EISSN	1286-4854
Keywords-Plus	SOUFRIERE-HILLS-VOLCANO; DYNAMICS; SLIP; MONTSERRAT; SYSTEM; MODEL
Research-Areas	Physics
Web-of-Science-Categories	Physics, Multidisciplinary
ResearcherID-Numbers	Alexandrov, Dmitri/D-2516-2016
ORCID-Numbers	Alexandrov, Dmitri/0000-0002-6628-745X
Funding-Acknowledgement	Russian Science Foundation {[}16-11-10095]
Funding-Text	This work was supported by the Russian Science Foundation (grant No. 16-11-10095).
Number-of-Cited-References	25
Journal-ISO	EPL
Doc-Delivery-Number	EJ1HN