CUED Publications database

Decadal persistence of cycles in lava lake motion at Erebus volcano, Antarctica

Peters, N and Oppenheimer, C and Kyle, P and Kingsbury, N (2014) Decadal persistence of cycles in lava lake motion at Erebus volcano, Antarctica. Earth and Planetary Science Letters, 395. pp. 1-12. ISSN 0012-821X

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Abstract

Studies of Erebus volcano's active lava lake have shown that many of its observable properties (gas composition, surface motion and radiant heat output) exhibit cyclic behaviour with a period of ~10 min. We investigate the multi-year progression of the cycles in surface motion of the lake using an extended (but intermittent) dataset of thermal infrared images collected by the Mount Erebus Volcano Observatory between 2004 and 2011. Cycles with a period of ~5-18 min are found to be a persistent feature of the lake's behaviour and no obvious long-term change is observed despite variations in lake level and surface area. The times at which gas bubbles arrive at the lake's surface are found to be random with respect to the phase of the motion cycles, suggesting that the remarkable behaviour of the lake is governed by magma exchange rather than an intermittent flux of gases from the underlying magma reservoir. © 2014 The Authors.

Item Type: Article
Uncontrolled Keywords: Bidirectional flow Conduit Convection Erebus volcano Lava lake Thermal imaging
Subjects: UNSPECIFIED
Divisions: Div F > Signal Processing and Communications
Depositing User: Cron Job
Date Deposited: 01 Jul 2014 10:45
Last Modified: 08 Dec 2014 08:45
DOI: 10.1016/j.epsl.2014.03.032