"The growing lava dome in the explosion crater as it appeared on May 19, 1983, three years after the main eruption. The dome is built from the composite of lava lobes extruded onto the surface during different eruption phases. Material is also added to the dome from within. As the composite dome increases in size, chances increase for collapses of its sides which could trigger pyroclastic flows and rock falls from the crater walls." (U.S. Dept. Of Commerce, 1980, p. 6)

Image of a growing lava dome in the explosion crater as it appeared on May 19, 1983, three years after the main eruption.
The growing lava dome in the explosion crater
Photo: Courtesy of NGDC/NOAA.

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