Here we see Socompa volcano in NE Chile (the peak at the right of this image with the bright blue (snow). The image is a combination of digital topographic data dereived from radar interferometry (using ERS-2 data) and a Landsat 5 Thematic Mapper image. The key landform is the orange and grey landslide in the lower part of the image. This is a catastrophic landslide deposit that formed about 5,700 years ago. The computer display allows us to visualize the flow path of the landslide, which is similar to several deposits that we will be studying in Java and the Lesser Sunda Islands using SRTM data.
Shuttle To Explore Volcanoes
 Washington - February 14, 2000 - The current shuttle mission will gather information key to the University of Hawai'i's research on the aftermath of volcanic eruptions. In November 1999, Professor Peter Mouginis-Mark, Hawaii Institute of Geophysics and Planetology, led a team of researchers in collecting information on the effects of the devastating 1991 Mount Pinatubo eruption in the Philippines.

NASA's Shuttle Radar Topography Mission (SRTM) will provide more extensive topographic data on that specific area as well as most of the rest of the Earth.

SRTM will employ an advanced measurement technique called "radar interferometry" to obtain topographic maps of the Earth's surface for use by scientists, emergency relief planners, commercial companies and many other investigators, according to NASA.

One of the two radar antennae that will form this "interferometer" will be located on a 197-foot mast that will be the largest fixed structure ever flown in space.

"It's providing a first look at the Earth's topography at this scale," Mouginis-Mark said. "Whether you're studying volcanoes, glaciers or mountains, the whole experience will be a tremendous one for all Earth scientists, which is why it's so exciting. And it's great that UH is once again involved in a space shuttle experiment."

Mouginis-Mark has worked with NASA on volcano research for more than 16 years, including three other space shuttle experiments. UH presently uses related data from active NASA satellite Landsat 7, launched in April 1999, and expects to obtain information from the satellite Terra, which was launched last month. The scheduled launch for the 11-day SRTM aboard space shuttle Endeavour is Jan. 31, 7:47 a.m. HST.

SRTM data collected for Pinatubo and other volcanoes will supplement UH's research into using satellites to monitor active volcanoes and the hazards they present. Mouginis-Mark said one aspect of this research is concerned with the way the topography of parts of the volcano is changing over time due to erosion of the 1991 ash by heavy rainfall.

"We're trying to understand what the hazards are to people living around the volcano," he said. "The ash deposits that erode away are eventually re-deposited on the lower slopes in the form of dangerous mud flows, otherwise called 'lahars,' after it rains."

Mouginis-Mark said the purpose of this research is hazard mitigation, which minimizes the dangers and devastation these lahars can cause. The project is significant to the state of Hawai'i, which is home to Kilauea, the Big Island's active volcano. The SRTM will use Kilauea as a calibration target, and the volume of its recent lava flows will be calculated using SRTM data.

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