Tuesday, October 25, 2005

Things that go glow in the night...

The nature of the incandescent glow from the growing lavadome on Mount St Helens appears to be a little more multi-faceted than in the past. On the night of 21/22 October 2005 the glow appeared to flicker between different locations in the crater. A combined image of all of the Volcanocam images from that night shows that the glow now appears to be coming from multiple sites in the crater:


The four distinct bright areas in the shot above appear to match the different mounds of rubble in the current lavadome as shown in a recent image from the USGS taken on October 18:

USGS photograph taken on October 3, 2005, by Stephanie Konfal
and Dan Dzurisin, and October 18, 2005, by Cate Fox-Lent

Last night the glow still appeared to flicker between different locations, but not over so much of the area as on the 21/22 October. Looking at another image combining all of the individual images from the night time shots from the Volcanocam shows that the activity was isolated to only two of the "mounds" on the lavadome...

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