Magma production and growth of the lava dome of the Soufriere Hills Volcano, Montserrat, West Indies: November 1995 to November 1997

Sparks, R. S. J., Young, S. R., Barclay, J., Calder, E. S., Cole, P., Darroux, B., Druitt, T. H., Harford, C., Herd, R. A., Hoblitt, R., James, M. R., LeJeune, A. M., Robertson, R., Stasiuk, M. V., Stevens, N. F., Toothill, J. and Wadge, G. (1998) Magma production and growth of the lava dome of the Soufriere Hills Volcano, Montserrat, West Indies: November 1995 to November 1997. Geophysical Research Letters, 25 (18). pp. 3421-3424. ISSN 1944-8007

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Abstract

From November 1995 to December 1997 a total volume of 246 × 106 (DRE) m³ of andesite magma erupted, partitioned into 93 × 106 m³ of the dome, 125 × 106 m³ of pyroclastic flow deposits and 28 × 106 m³ of explosive ejecta. In the first 11 weeks magma discharge rate was low (0.5 m³/s). From February 1996 to May 1997 discharge rates have averaged 2.1 m³/s, but have fluctuated significantly and have increased with time. Three pulses lasting a few months can be recognised with discharge rates reaching 3 to 8 m³/s. Short term pulsations in growth lasting a few days reach discharge rates of over 10 m³/s and there are periods of days to a few weeks when dome growth is < 0.5 m³/s. Discharge rate increased from May 1997 with an average rate of 7.5 m³/s to December 1997. The observations indicate an open magmatic system.

Item Type: Article
Faculty \ School: Faculty of Science > School of Environmental Sciences
UEA Research Groups: Faculty of Science > Research Groups > Geosciences
Faculty of Science > Research Groups > Volcanoes@UEA (former - to 2018)
Faculty of Science > Research Groups > Geosciences and Natural Hazards (former - to 2017)
Depositing User: Rachel Snow
Date Deposited: 28 Mar 2011 13:07
Last Modified: 30 Jan 2025 07:32
URI: https://ueaeprints.uea.ac.uk/id/eprint/27310
DOI:

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