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Астронет: Астрономическая картинка дня Растущая каменная плита в вулкане Св.Елены http://variable-stars.ru/db/msg/1214024/eng |
Credit & Copyright: Dan Dzurisin,
Cascades Volcano Observatory,
USGS
Explanation:
A new rock slab is growing at more than one meter a day on the
Mt. St. Helens volcano in
Washington,
USA.
The rock slab, growing since last November, now extends about 100 meters out from
one of the volcano's craters.
A recently made time lapse movie shows the
rock slab growing.
Pictured
above, a
helicopter examines
the
steaming hot rock slab late last month.
Mt. St. Helens underwent
a
spectacular eruption in 1980 but has been undergoing a
comparatively serene eruption since 2004 September.
A new volcanic dome has been building which is now about 100 meters above the
1980s dome.
The rock slab is visible from the Johnson Ridge Observatory on the
erupting volcano.
Authors & editors:
Robert Nemiroff
(MTU) &
Jerry Bonnell
(USRA)
NASA Web Site Statements, Warnings,
and Disclaimers
NASA Official: Jay Norris.
Specific
rights apply.
A service of:
LHEA at
NASA /
GSFC
& Michigan Tech. U.