Friday, February 18, 2005

Mount St Helens - update and promise of nighttime activity?

Last night the glow from the lavadome was almost non-existent, although it was visible after considerable image enhancement.

The USGS/CVO are reporting that the "[r]esults of Wednesday’s thermal-imaging flight suggest that a longitudinal crack is developing along the top of the new lava dome. Similar to what happened in mid-December, the long smooth whaleback-shaped dome may be starting to crack apart. During such a process, the probability of rock avalanches increases and with that an increased chance of more ash clouds rising above the crater rim than we’ve witnessed in recent weeks."

This will almost certainly mean that further outbursts of activity are likely in the coming days/weeks and if they occur at night, bright displays during the night. Stay tuned...

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