Use of a portable topographic mapping millimetre wave radar at an active lava flow

D G Macfarlane, G Wadge, D A Robertson, M R James, H Pinkerton

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

A ground-based millimetre wave radar, AVTIS (All-weather Volcano Topography Imaging Sensor), has been developed for topographic monitoring. The instrument is portable and capable of measurements over ranges up to similar to 7 km through cloud and at night. In April and May 2005, AVTIS was deployed at Arenal Volcano, Costa Rica, in order to determine topographic changes associated with the advance of a lava flow. This is the first reported application of mm-wave radar technology to the measurement of lava flux rates. Three topographic data sets of the flow were acquired from observation distances of similar to 3 km over an eight day period, during which the flow front was detected to have advanced similar to 200 m. Topographic differences between the data sets indicated a flow thickness of similar to 10 m, and a dense rock equivalent lava flux of similar to 0.20 +/- 0.08 m(3) s(-1).

Original languageEnglish
Number of pages4
JournalGeophysical Research Letters
Volume33
DOIs
Publication statusPublished - 1 Feb 2006

Keywords

  • COSTA-RICA
  • VOLCANO
  • ERUPTION

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