Global Volcanism Program | Image GVP-07085
A small explosion 8 February 1999 produced a plume of gas and minor ash that is seen here from the SE about 5 seconds after the explosion began. Rapid lava extrusion began on 20 November 1998 and produced a lava dome in the 1994 crater that soon flowed over the crater rim, producing lava flows that descended the SW flank in several lobes. Block-and-ash flows from collapse of the flow fronts traveled down SW flank drainages. Periodic larger explosions occurred later during this eruption.
Photo by Jim Luhr, 1999 (Smithsonian Institution).
This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.