August 2005
Night of 30/31 August - The clouds
departed and gave us a good view of the crater last night. There was a small
rock fall from the lavadome at 21:40 and then a much larger rockfall and bright
outburst at 23:50, which coincided with a
M2.9 tremor. Below are two animations combining the images
from last night - the first shows the glow at the approximate brightness
as recorded on the Volcanocam images, the second was further enhanced to
emphasise the brightness of the glow.
Flash movie - showing just the glow (size
203 kB)
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 203 kB)
Night of 27/28 August - There
were three bright outbursts of activity last night around 23:45, 00:25 and
03:40, which coincided in time with tremors of magnitudes
M2.8,
M2.4, and
M2.8. Below are two animations combining the images
from last night - the first shows the glow at the approximate brightness
as recorded on the Volcanocam images, the second was further enhanced to
emphasise the brightness of the glow.
Flash movie - showing just the glow (size
204 kB)
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 223 kB)
Night of 26/27 August - There
were no large outbursts and the activity level of the glow was fairly constant
throughout the night. Below are two animations combining the images
from last night - the first shows the glow at the approximate brightness
as recorded on the Volcanocam images, the second was further enhanced to
emphasise the brightness of the glow.
Flash movie - showing just the glow (size
200 kB)
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 215 kB)
Night of 25/26 August - Another
clear night with a good view of the crater. The glow from the lavadome was
intermittently visible from sunset until a large outburst occurred at 01:00 this
morning, it then slowly decayed but remained reasonably bright for the rest of
the night. Below are two animations combining the images
from last night - the first shows the glow at the approximate brightness
as recorded on the Volcanocam images, the second was further enhanced to
emphasise the brightness of the glow.
Flash movie - showing just the glow (size
237 kB)
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 223 kB)
Night of 24/25 August - The weather
was clear and the glow was visible for the entire night. There was a large and
bright outburst at 21:26, after which the glow flickered away for the rest of
the night. Below are two animations combining the images
from last night - the first shows the glow at the approximate brightness
as recorded on the Volcanocam images, the second was further enhanced to
emphasise the brightness of the glow.
Flash movie - showing just the glow (size
271 kB)
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 214 kB)
Night of 23/24 August - The weather
was clear and the glow was visible for the entire night. There were no major
outbursts, but smaller events occurred at 23:21, 00:36 and 03:06. The events
coincided with small tremors as shown on the
webicorder trace from SHW. Below are two animations combining the images
from last night - the first shows the glow at the approximate brightness
as recorded on the Volcanocam images, the second was further enhanced to
emphasise the brightness of the glow.
Flash movie - showing just the glow (size
242 kB)
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 231 kB)
Night of 22/23 August - There
was only one small outburst at 00:11 this morning, otherwise the level of
activity was quite subdued. The clouds rolled in just after 03:00 this morning
and blocked the view of the crater, just before a M3.0
tremor occurred. Unfortunately, there's no way of telling if this small quake
triggered a bright outburst from the lavadome. Below are two animations combining the images
from last night - the first shows the glow at the approximate brightness
as recorded on the Volcanocam images, the second was further enhanced to
emphasise the brightness of the glow.
Flash movie - showing just the glow (size
331 kB)
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 188 kB)
Night of 21/22 August - The
brightest outburst occurred last night at 20:56, just after the sun set. Clouds
obscured the view of the crater intermittently during the night, but the glow
was fairly constant and visible for most of the night. Below are two animations combining the images
from last night - the first shows the glow at the approximate brightness
as recorded on the Volcanocam images, the second was further enhanced to
emphasise the brightness of the glow.
Flash movie - showing just the glow (size
484 kB)
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 336 kB)
Night of 20/21 August - There
were numerous small bursts of activity last night and a couple of larger
outbursts around 21:30 and 02:00. Below are two animations combining the images
from last night - the first shows the glow at the approximate brightness
as recorded on the Volcanocam images, the second was further enhanced to
emphasise the brightness of the glow.
Flash movie - showing just the glow (size
346 kB)
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 317 kB)
Night of 19/20 August - While there
weren't as many large bright outbursts as last night, it was still a good show.
There was a significant outburst just after 23:40, which also appeared to generate a large plume
of material. Below are two animations combining the images
from last night - the first shows the glow at the approximate brightness
as recorded on the Volcanocam images, the second was further enhanced to
emphasise the brightness of the glow.
Flash movie - showing just the glow (size
329 kB)
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 303 kB)
Night of 18/19 August - What a
night! Numerous bright outbursts illuminated the crater and several plumes of
dust/steam were released as well. The brightest outbursts occurred around 21.20,
22:51 and
01:20 and all coincided with larger tremors clearly visible on the
webicorder traces. Below are two animations combining the images
from last night - the first shows the glow at the approximate brightness
as recorded on the Volcanocam images, the second was further enhanced to
emphasise the brightness of the glow.
Flash movie - showing just the glow (size
419 kB)
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 360 kB)
Night of 16/17 August - The view
of the crater was obscured by clouds for most of the night, apart from a brief
window that appeared between approximately midnight and 02:00. There was a
stronger tremor at
03:00
this morning, but unfortunately the clouds blocked the view. The animation below
shows the glow at the approximate brightness as recorded on the Volcanocam
images (and only for the 2 hours the glow was visible).
Flash movie - showing just the glow (size
301 kB)
16 August - On the 12th August USGS
photographer Elliot Endo captured a sequence of
images of the lavadome following the sunset from the Johnston Ridge
Observatory. Just for fun I have combined these images into a short animation -
hopefully to give a sense of watching the incandescent glow appear as the night
falls. After all, its interesting to see the details of that make up the diffuse
brightness we see on the Volcanocam images each night (at least when the weather
is clear).
Flash movie of the glow appearing (size 452
kB)
Night of 15/16 August - There were a couple of
small outbursts last night, most
notably at 21:36, 00:41 and 03:31. Below
are two animations combining the images from last night - the first shows the
glow at the approximate brightness as recorded on the Volcanocam images with the
noise removed, the second shows the same images superimposed on a background
image of the mountain.
Flash movie - showing just the glow (size
301 kB)
Flash movie - showing images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 215 kB)
Night of 14/15 August - The
Volcanocam came back on line yesterday morning at around 10:30 and has been
working fine since. Last night there were a couple of bright outbursts, most
notably at 00:21 and 03:51 this morning. There was also a larger tremor at 03:50
which is easily distinguished on the
St
Helens - West webicorder trace. Below
are two animations combining the images from last night - the first shows the
glow at the approximate brightness as recorded on the Volcanocam images with the
noise removed, the second shows the same images superimposed on a background
image of the mountain.
Flash movie - showing just the glow (size
254 kB)
Flash movie - showing images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 216 kB)
Night of 11/12 August - There
were no major outbursts of activity last night. In fact, the glow was hardly
visible after removing the noise from the images, and was only revealed with
further image enhancement. Below
is just one animation from last nights images, it was processed to remove noise
then further enhanced to maximise the brightness of the glow.
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 476 kB)
Night of 10/11 August - There were a number of small outbursts in activity last
night at 21:25, 00:35 & 04:40. Below are two animations combining the images
from last night - the first shows the glow at the approximate brightness
as recorded on the Volcanocam images, the second was enhanced further to
maximise the brightness of the glow.
Flash movie - showing just the glow (size
242 kB)
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 221 kB)
Night of 09/10 August - There were a number of small outbursts in activity last
night at 22:35, 01:40 & 04:05. Below are two animations combining the images
from last night - the first shows the glow at the approximate brightness
as recorded on the Volcanocam images, the second was enhanced further to
maximise the brightness of the glow.
Flash movie - showing just the glow (size
230 kB)
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 233 kB)
Night of 08/09 August - There
were a number of outbursts in activity last night at 22:10, 00:30, 02:34
& 03:25.
There were no earthquakes
detected
by the automatic reporting system (as at 06:50am) but some of the outbursts
correspond with tremors shown in the
webicorder traces - most notably the bright outburst at 03:25 this morning. Below
are two animations combining the images from last night - the first shows the
glow at the approximate brightness as recorded on the Volcanocam images with the
noise removed, the second shows the same images superimposed on a background
image of the mountain.
Flash movie - showing just the glow (size
248 kB)
Flash movie - showing images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 217 kB)
Night of 07/08 August - There
were a number of outbursts in activity last night at 00:30 (small), 02:35 (large)
& 03:05 (small).
There were no earthquakes
detected
by the automatic reporting system (as at 07:00am). Below
are two animations combining the images from last night - the first shows the
glow at the approximate brightness as recorded on the Volcanocam images with the
noise removed, the second shows the same images superimposed on a background
image of the mountain.
Flash movie - showing just the glow (size
248 kB)
Flash movie - showing images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 224 kB)
Night of 06/07 August - There
were two further outbursts in activity last night at 00:30 (small) and 02:10 (large).
There were no earthquakes
detected
by the automatic reporting system (as at 11:30am), but the
webicorder trace
from JUN station clearly shows a quake corresponding to the 02:10 event. Below
are two animations combining the images from last night - the first shows the
glow at the approximate brightness as recorded on the Volcanocam images with the
noise removed, the second shows the same images superimposed on a background
image of the mountain.
Flash movie - showing just the glow (size
262 kB)
Flash movie - showing images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 226 kB)
Night of 05/06 August - There
were two outbursts in activity last night at 22:35 (small) and 23:50 (larger).
There were no earthquakes
detected
by the automatic reporting system (as at 11:00am), but the
webicorder traces
clearly show a couple of small quakes corresponding to these times. However,
they were not large tremors and there were many others during the night that
didn't correspond with any brightening of the glow. Below are two animations of
last nights images - the first shows the glow at
the approximate brightness as recorded on the Volcanocam images, the second was
enhanced further to maximise the brightness of the glow.
Flash movie - showing just the glow (size
255 kB)
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 227 kB)
Night of 04/05 August - There
were no outbursts during the night and the glow was faint, but relatively
constant throughout the night. Below are two animations - the first shows the glow at
the approximate brightness as recorded on the Volcanocam images, the second was
enhanced further to maximise the brightness of the glow.
Flash movie - showing just the glows (size
287 kB)
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 225 kB)
Night of 03/04 August - There weather
was clear, but the incandescent glow from the lavadome was very faint and there
were no outbursts during the night. Below are two animations - the first shows the glow at
the approximate brightness as recorded on the Volcanocam images, the second was
enhanced further to maximise the brightness of the glow.
Flash movie - showing just the glow (size
241 kB)
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 218 kB)
Night of 02/03 August - It was a
clear night and the glow from the lavadome was visible and fairly constant
throughout the night. There were no larger tremors last night and no major
outbursts of activity. Below are two animations
combining the images from last night - the first shows the glow at
the approximate brightness as recorded on the Volcanocam images with the noise
removed, the second
shows the same images superimposed on a background image of the mountain.
Flash movie - showing just the glow (size
276 kB)
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 237 kB)
Night of 01/02 August - The night
started with a few clouds obscuring the view of the crater, but the weather
later cleared to reveal the glow from the lavadome. There was one small outburst
of activity around 02:15 this morning. Below are two animations
combining the images from last night - the first shows the glow at
the approximate brightness as recorded on the Volcanocam images with the noise
removed, the second
shows the same images superimposed on a background image of the mountain.
Flash movie - showing just the glow (size
223 kB)
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 203 kB)
Night of 31/01 August - The mountain
was partially obscured by clouds in the early part of the evening and then early
this morning before sunrise. However, there have been two M3.0 tremors in the
last 24 hours, and the one that occurred at
00:15 was
associated with a bright outburst from the lavadome. Below are two animations
combining the images from last night - the first shows the glow at
the approximate brightness as recorded on the Volcanocam images with the noise
removed, the second
shows the same images superimposed on a background image of the mountain.
Flash movie - showing just the glow (size
195 kB)
Flash movie - showing enhanced images of the
glow superimposed on a background image of the mountain for reference
(only the area around the crater animated)
(size 185 kB)