Archives July 2006
Night of 30/31 July - Clouds obscured the view of the mountain from
sunset until approximately 03:00 this morning - roughly 30 minutes after a
M3.6 tremor was recorded in the crater. There were two hotspots visible, one
at the top of the lavadome and another to the lower right. Another small
rockfall and associated bright outburst occurred at 04:12.
The first animation below shows the full frame processed images of the mountain
which have been enhanced to maximise the brightness of the glow and the second
shows those images superimposed over a daytime image of the crater for
reference. The animation speed is set at 2 fps (equivalent of 10 minutes in
real time per second)
only the images between 02:27 and sunrise are included.
Flash
movie - enhanced images of the glow (size 167kB)
Flash movie - enhanced images of the glow, superimposed on a background image of
the mountain - only the area around the crater is animated (size 110kB)
Night of 29/30 July - Despite the thick cloud cover that shrouded the
crater from view for most of the night, there was a very large outburst from the
crater at 00:15 last night - which briefly filled the entire crater with light,
reflected from the low clouds overhead. There was no corresponding seismic
activity (see e.g.
Yellow Rock webicorder trace). A very faint brightening of the crater also
occurred at 22:50, but was mainly obscured by clouds and is difficult to see in
the animations below. The final event occurred at 01:25 which illuminated the
area around the base of the lavadome. No other visible activity was observed for
the rest of the night.
The first animation below shows the full frame processed images of the mountain
which have been enhanced to maximise the brightness of the glow and the second
shows those images superimposed over a daytime image of the crater for
reference. The animation speed is set at 2 fps (equivalent of 10 minutes in
real time per second)
only the images between 22:40 and 01:25 are included.
Flash
movie - enhanced images of the glow (size 125kB)
Flash movie - enhanced images of the glow, superimposed on a background image of
the mountain - only the area around the crater is animated (size 103kB)
Night of 27/28 July - There were two tremors greater than M3 yesterday
afternoon at
16:41 &
18:58 that were associated with brief small ash clouds. There were a number
of smaller tremors last night (see e.g.
Yellow
Rock webicorder). Unfortunately, all this activity didn't translate into
much visible activity in the crater last night. Faint hotspots were visible
21:46-22:00, 00:51 and a much brighter outburst at 03:36.
The animation below shows the processed images of the mountain
which have been enhanced to maximise the brightness of the glow and superimposed over a daytime image of the crater for
reference. The animation speed is set at 6 fps (equivalent of half an hour in
real time per second).
Flash movie - enhanced images of the glow, superimposed on a background image of
the mountain - only the area around the crater is animated (size 179kB)
Night of 23/24 July - It was quite an active night on Mount St Helens
last night. There was a small outburst in activity at 21:57, another at 22:48,
then a much larger event at 00:33. For the rest of the night the glow flickered
away until just before sunrise. Similarly to the event on the night of 21/22
July (see below) the outburst occurred just prior to a tremor as recorded on the
PNSN webicorders (see e.g.
Yellow
Rock webicorder). The time difference may be real, or it may be due to the
clock on the server processing the images being slightly off.
The first animation below shows the full frame processed images of the mountain
which have been enhanced to maximise the brightness of the glow and the second
shows those images superimposed over a daytime image of the crater for
reference. The animation speed is set at 6 fps (equivalent of half an hour in
real time per second).
Flash
movie - enhanced images of the glow (size 316kB)
Flash movie - enhanced images of the glow, superimposed on a background image of
the mountain - only the area around the crater is animated (size 168kB)
Night of 22/23 July - The glow from the lavadome was visible and fairly
constant in intensity throughout the night. There was one small outburst at
00:30, which did not correspond with any obvious seismic activity (see e.g.
Yellow
Rock webicorder).
The animation below shows the processed images of the mountain
which have been enhanced to maximise the brightness of the glow and superimposed over a daytime image of the crater for
reference. The animation speed is set at 6 fps (equivalent of half an hour in
real time per second).
Flash movie - enhanced images of the glow, superimposed on a background image of
the mountain - only the area around the crater is animated (size 195kB)
Night of 21/22 July - Just after sunset there was a large bright outburst
from the lavadome, which occurred just before a
M2.9 tremor recorded on the various seismic monitors (see e.g.
Yellow
Rock station trace). As on the previous few nights. there were several
hotspots visible on last nights images. A
stacked image combining all
of the images showing the glow shows the extent of the activity last night.
The first animation below shows the full frame processed images of the mountain
which have been enhanced to maximise the brightness of the glow and the second
shows those images superimposed over a daytime image of the crater for
reference. The animation speed is set at 6 fps (equivalent of half an hour in
real time per second).
Flash
movie - enhanced images of the glow (size 314kB)
Flash movie - enhanced images of the glow, superimposed on a background image of
the mountain - only the area around the crater is animated (size 119kB)
Night of 20/21 July - The glow from the lavadome was visible throughout
the night and there were multiple small outbursts from at least two different
locations (e.g. see
stacked
version of last night's images).
The first animation below shows the full frame processed images of the mountain
which have been enhanced to maximise the brightness of the glow and the second
shows those images superimposed over a daytime image of the crater for
reference. The animation speed is set at 6 fps (equivalent of half an hour in
real time per second).
Flash
movie - enhanced images of the glow (size 298kB)
Flash movie - enhanced images of the glow, superimposed on a background image of
the mountain - only the area around the crater is animated (size 174kB)
Night of 19/20 July - There were several distinct hotspots visible on the
lavadome during last night and several small tremors associated with the
activity (see e.g.
Yellow
Rock webicorder). Following the tremor around 01:31 four distinct glows were
seen emanating from the lavadome (see this
stacked version of last night's
images).
The first animation below shows the full frame processed images of the mountain
which have been enhanced to maximise the brightness of the glow and the second
shows those images superimposed over a daytime image of the crater for
reference. The animation speed is set at 6 fps (equivalent of half an hour in
real time per second).
Flash
movie - enhanced images of the glow (size 319kB)
Flash movie - enhanced images of the glow, superimposed on a background image of
the mountain - only the area around the crater is animated (size 161kB)
Night of 18/19 July - Yesterday morning at 09:55am (local time) one of the
largest tremors to shake the mountain since the current eruption began two years
ago - the quake registered
M3.6 (see also the
webicorder traces,
e.g
Yellow Rock station). Last night there was a much smaller tremor at 22:48 (e.g
YELL
webicorder) which triggered a brief, but bright display from the lavadome.
There was no additional visible activity between midnight and sunrise this
morning.
The first animation below shows the processed images at the approximate
brightness as seen in the Volcanocam images and the second shows enhanced images
superimposed over a daytime image of the crater for reference. The animation
speed is set at 6 fps (equivalent of half an hour in real time per second) and
only the images between sunset and midnight are included.
Flash movie - images of the glow (size
137kB)
Flash movie - enhanced images of the glow, superimposed on a background image of
the mountain - only the area around the crater is animated (size 110kB)
Night of 15/16 July - It was a clear night and the glow from the lavadome
was visible for most of the night. Interestingly, there was activity to the
lower left of the "spine" as well as the top of the spine and to the lower right
of it as well. By stacking the frames from last night into
one image, we can
see where the outbursts occurred in relation to one another.
The first animation below shows the full frame processed images of the mountain
which have been enhanced to maximise the brightness of the glow and the second
shows those images superimposed over a daytime image of the crater for
reference. The animation speed is set at 6 fps (equivalent of half an hour in
real time per second).
Flash
movie - enhanced images of the glow (size 314 kB)
Flash movie - enhanced images of the glow, superimposed on a background image of
the mountain - only the area around the crater is animated (size 160 kB)
Night of 13/14 July - There was quite a bit of activity in the crater
last night, despite a few lingering clouds. Just after 22:00 there was a bright
outburst located in the mid region of the lavadome, followed by some further
activity near the tip of the "spine" around 02:00.
The first animation below shows the full frame processed images of the mountain
which have been enhanced to maximise the brightness of the glow and the second
shows those images superimposed over a daytime image of the crater for
reference. The animation speed is set at 6 fps (equivalent of half an hour in
real time per second).
Flash
movie - enhanced images of the glow (size 372 kB)
Flash movie - enhanced images of the glow, superimposed on a background image of
the mountain - only the area around the crater is animated (size 204 kB)
Night of 11/12 July - There was a larger tremor (M3.3)
at 20:24pm last night, and a small cloud of ash was seen rising from the crater.
The incandescent glow from the lavadome was quite active from sunset until
clouds obscured the view around 23:00 - so only a short animation was possible.
The first animation below shows the processed images at the approximate
brightness as seen in the Volcanocam images and the second shows enhanced images
superimposed over a daytime image of the crater for reference. The animation
speed is set at 6 fps (equivalent of half an hour in real time per second) and
only the images where the glow was visible are included.
Flash movie - images of the glow (size
119 kB)
Flash movie - enhanced images of the glow, superimposed on a background image of
the mountain - only the area around the crater is animated (size 92 kB)
Night of 10/11 July - The moon illuminated the mountain for most of the
night and there were several bright outbursts from different locations on the
lavadome. All in all, it made for a dramatic and fascinating show.
The first animation below shows the processed images at the approximate
brightness as seen in the Volcanocam images and the second shows enhanced images
superimposed over a daytime image of the crater for reference. The animation
speed is set at 6 fps (equivalent of half an hour in real time per second).
Flash movie - images of the glow (size 552 kB)
Flash movie - enhanced images of the glow, superimposed on a background image of
the mountain - only the area around the crater is animated (size 279 kB)
Night of 08/09 July - The Volcanocam server is back up and the view of
the crater was generally clear, with some clouds and the full moon passing just
over the rim of the crater. There were no bright outbursts, but the glow from
the lavadome made a few faint appearances during the night.
The first animation below shows the full frame processed images of the mountain
which have been enhanced to maximise the brightness of the glow and the second
shows those images superimposed over a daytime image of the crater for
reference. The animation speed is set at 6 fps (equivalent of half an hour in
real time per second).
Flash
movie - enhanced images of the glow (size 459 kB)
Flash movie - enhanced images of the glow, superimposed on a background image of
the mountain - only the area around the crater is animated (size 223 kB)
Night of 03/04 July - The glow was visible intermittently from just
before 02:00 until sunrise. A number of smaller tremors were also observed
overnight (e.g.
YELL
webicorder).
The first animation below shows the full frame processed images of the mountain
which have been enhanced to maximise the brightness of the glow and the second
shows those images superimposed over a daytime image of the crater for
reference. The animation speed is set at 6 fps (equivalent of half an hour in
real time per second).
Flash
movie - enhanced images of the glow (size 308 kB)
Flash movie - enhanced images of the glow, superimposed on a background image of
the mountain - only the area around the crater is animated (size 164 kB)
Night of 02/03 July - There was a bright outburst from the top of the
lavadome at 02:53 this morning, which corresponded with a small tremor as
recorded on the USGS/CVO webicorders (e.g. see
YELL
station trace). There were no visible signs of activity prior to that time.
The first animation below shows the full frame processed images of the mountain
which have been enhanced to maximise the brightness of the glow and the second
shows those images superimposed over a daytime image of the crater for
reference. The animation speed is set at 6 fps (equivalent of half an hour in
real time per second) and
only the images where the glow was visible are included.
Flash
movie - enhanced images of the glow (size 171 kB)
Flash movie - enhanced images of the glow, superimposed on a background image of
the mountain - only the area around the crater is animated (size 110 kB)
