CVO Photo Archives - Mount St. Helens - 2005
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MSH05_MOVIE_dome_from_sugarbowl_06-16_to_08-16-05.avi
"MOVIE"
New dome as seen from the remote camera on Sugar Bowl, from June 16, 2005 through August 15, 2005, with 45 images grouped together to create a "movie".
This time-lapse movie of the growing lava dome at Mount St. Helens is based on daily photographs taken by an automated digital camera system on Sugar Bowl Dome, located at the crater mouth about 2.3 km (1.4 miles) north-northeast of the vent. The movie covers the time period from June 16 to August 16, 2005, and shows dramatic changes in the new dome during that two-month interval. A smooth-sided, light gray whaleback feature grew upward and southward in June and early July, then largely collapsed in a series of rockfalls in mid-July. A new, nearly vertical lava spine emerged to the west (to the right in this view) of the older whaleback in early August, allowing the remnants of the older whaleback to sag and slide down slope, back toward the vent. The volume of the new dome that has grown since October 2004 was about 54 million cubic meters (71 million cubic yards) in mid-June, and about 57 million cubic meters (75 million cubic yards) in mid-July. The lava dome that grew in the crater from 1980 to 1986 is visible in the lower right portion of the frame.
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more from http://vulcan.wr.usgs.gov/Volcanoes/Cascades/CurrentActivity/current_updates.html
U.S. Geological Survey, Vancouver, Washington
University of Washington, Pacific Northwest Seismograph Network, Seattle, Washington
Wednesday, August 17, 2005 10:10 a.m. PDT (1710 UTC)
MOUNT ST. HELENS UPDATE
Current status is Volcano Advisory (Alert Level 2); aviation color code ORANGE: Growth of the new lava dome inside the crater of Mount St. Helens continues, accompanied by low rates of seismicity, low emissions of steam and volcanic gases, and minor production of ash. During such eruptions, changes in the level of activity can occur over days to months. The eruption could intensify suddenly or with little warning and produce explosions that cause hazardous conditions within several miles of the crater and farther downwind. Small lahars could suddenly descend the Toutle River if triggered by heavy rain or by interaction of hot rocks with snow and ice. These lahars pose a negligible hazard below the Sediment Retention Structure (SRS) but could pose a hazard along the river channel upstream.
Potential ash hazards: Wind forecasts from the National Oceanic and Atmospheric Administration (NOAA), coupled with eruption models, show that any ash clouds rising above the crater rim today would drift eastward early in the day and southeastward later.
Potential ash hazards to aviation: Under current eruptive conditions, small, short-lived explosions may produce ash clouds that exceed 30,000 feet in altitude. Ash from such events can travel 100 miles or more downwind.
Recent observations: Two more relatively large earthquakes have occurred- a M2.8 at 3am and a M2.7 at about 9am. The mountain is shrouded in clouds this morning, but recent images from the camera at the mouth of the crater show that as the new lava spine grows, the area of the formerly active spine is sagging and collapsing. The earthquakes are likely associated chiefly with that collapse. Except for these occasional larger quakes, seismicity and deformation remain largely the same as in the past several days. Later this week, weather permitting, field crews will get out to make visual observations. A time-lapse movie showing recent growth and collapse of the lava dome is posted on the USGS website below.
U.S. Geological Survey and the University of Washington continue to monitor the situation closely and will issue additional updates and changes in alert level as warranted.
For additional information, background, images, and other graphics
For seismic information
For a definition of alert levels
For a webcam view of the volcano
Telephone recordings with the latest update on Mount St. Helens and phone contacts for additional information can be heard by calling:
Media (360) 891-5180
General public (360) 891-5202
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