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  Image: Geographic Location Direction Photo #: STS064-51-25 Date: Sep. 1994
Geographic Region: USA-WASHINGTON
Feature: MT. ST. HELENS

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  STS064-51-25 Mount Saint Helens National Volcanic Monument, Washington State, U.S.A. September 1994
This spectacular, near-vertical photograph taken in September 1994 shows the 8360-foot (2548-meter) Mount Saint Helens volcano with its developing lava dome and expansive pumice plain. The grayish-colored area of the blast zone from the 1980 eruption extends outward to the northwest, north, and northeast of the volcano. North of the volcano lie three major lakes from east to west--Spirit Lake (the largest), the elongated Coldwater Lake, and Castle Lake. South of Mount Saint Helens are clear-cut patterns (lumbering) interspersed throughout the darker green forested region of the Gifford Pinchot National Forest. Mount Saint Helens erupted on May 18, 1980, at 8:32 a.m. Pacific time. A series of moderate-to-severe earthquakes preceded the eruption, sending the north side of the mountain cascading downward toward Spirit Lake. This avalanche, the largest ever observed in the Western Hemisphere, weakened the magma chambers within the volcano, causing a northward lateral and vertical explosion that destroyed over 270 square miles (700 square kilometers) of forest in 5 seconds, and sent a billowing cloud of ash and smoke 70 000 feet (21 000 meters) into the atmosphere. Visible on the photograph and situated between the caldera of the volcano and Spirit Lake is a large, grayish pumice plain. This plain is made up of volcanic mud, ash, and debris that buried the original Toutle River Valley to a depth of 1000 feet (300 meters). This avalanche of debris and ash raised the level of Spirit Lake 200 feet (61 meters) over its pre-eruption level, blocked the flow of Coldwater Creek, and formed the now elongated 300-foot-deep (91-meter-deep) Coldwater Lake. This lake is located approximately 7 miles (11 kilometers) from the volcano. The lava dome, which is visible in the center of the volcano crater, has attained a height of 1700 feet (518 meters) since it began to form in the early 1980s. Though not clearly visible on the photograph, vegetation has returned and is flourishing in most areas of the blast zone, with the exception of the pumice plain area.
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Images: All Available Images Low-Resolution 100k
Mission: STS064  
Roll - Frame: 51 - 25
Geographical Name: USA-WASHINGTON  
Features: MT. ST. HELENS  
Center Lat x Lon: 46.0N x 122W
Film Exposure:   N=Normal exposure, U=Under exposed, O=Over exposed, F=out of Focus
Percentage of Cloud Cover-CLDP: 0
Camera Tilt: NV   LO=Low Oblique, HO=High Oblique, NV=Near Vertical
Camera Focal Length:  
Nadir to Photo Center Direction:   The direction from the nadir to the center point, N=North, S=South, E=East, W=West
Stereo?:   Y=Yes there is an adjacent picture of the same area, N=No there isn't
Orbit Number:  
Date: 199409__   YYYYMMDD
Nadir Lat: N  
Latitude of suborbital point of spacecraft
Nadir Lon: E  
Longitude of suborbital point of spacecraft
Sun Azimuth:   Clockwise angle in degrees from north to the sun measured at the nadir point
Space Craft Altitude:   nautical miles
Sun Elevation:   Angle in degrees between the horizon and the sun, measured at the nadir point
Atmosphere Views:  
City Views:  
Photo is not associated with any sequences

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