Volumetric characteristics of lava flows from interferometric radar and multispectral satellite data: the 1995 Fernandina and 1998 Cerro Azul eruptions in the western Galapagos

S K Rowland, A J L Harris, M J Wooster, F Amelung, H Garbeil, L Wilson, P J Mouginis-Mark

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73 Citations (Scopus)

Abstract

We have used a suite of remotely sensed data, numerical lava flow modeling, and field observations to determine quantitative characteristics of the 1995 Fernandina and 1998 Cerro Azul eruptions in the western Galdpagos Islands. Flank lava flow areas, volumes, instantaneous effusion rates, and average effusion rates were all determined for these two eruptions, for which only limited syn-eruptive field observations are available. Using data from SPOT, TOPSAR, ERS-1, and ERS-2, we determined that the 1995 Fernandina flow covers a subaerial area of 6.5x 10(6) m(2) and has a subaerial dense rock equivalent (DRE) volume of 42x 10(6) m(3). Field observations, ATSR satellite data, and the FLOWGO numerical model allow us to determine that the effusion rate declined exponentially from a high of similar to60-200 m(3) s(-1) during the first few hours to
Original languageEnglish
Pages (from-to)311 - 330
Number of pages20
JournalBULLETIN OF VOLCANOLOGY
Volume65
Issue number5
DOIs
Publication statusPublished - Jul 2003

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