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Figure 4. Scanning electron micrograph of descaling area delimited by box in Figure 3 showing epidermal disruption (arrows), empty scale pockets and restoration of epidermal integrity (asterisk). An exposed scale with visible concentric ridges is visible at the lower center. Scale bar = 500 µm.
Figure 4. Scanning electron micrograph of descaling area delimited by box in Figure 3 showing epidermal disruption (arrows), empty scale pockets and restoration of epidermal integrity (asterisk). An exposed scale with visible concentric ridges is visible at the lower center. Scale bar = 500 µm.
Monitoring station VALT was installed on the crater floor of Mount St. Helens in 2006. It was called VALT because a vault-like structure about the size of a large doghouse was built into the rocky deposits to protect the state-of-the-art (at that time) broadband seismometer from environmental variables such as temperature and humidity.
Monitoring station VALT was installed on the crater floor of Mount St. Helens in 2006. It was called VALT because a vault-like structure about the size of a large doghouse was built into the rocky deposits to protect the state-of-the-art (at that time) broadband seismometer from environmental variables such as temperature and humidity.
Seismic station at Yellow Rock (YEL) with the toe of the west arm of Crater Glacier in the background. This station site was eventually covered by the glacier.
Seismic station at Yellow Rock (YEL) with the toe of the west arm of Crater Glacier in the background. This station site was eventually covered by the glacier.
Researcher weighing sturgeon. Columbia River, bottom trawl for young-of-year (YOY) indexing.
Researcher weighing sturgeon. Columbia River, bottom trawl for young-of-year (YOY) indexing.
Researcher measuring sturgeon length. Bottom trawl for young-of-year (YOY) indexing. Columbia River.
Researcher measuring sturgeon length. Bottom trawl for young-of-year (YOY) indexing. Columbia River.
Typical clinical signs of disease, pop eye, dermal hemorrhages, abdominal distension, and hemorrhages at the base of fins, displayed in koi infected with spring viremia of carp virus (SVCV).
Typical clinical signs of disease, pop eye, dermal hemorrhages, abdominal distension, and hemorrhages at the base of fins, displayed in koi infected with spring viremia of carp virus (SVCV).
Panoramic photograph from the southern rim of Mount St. Helens' crater rim looking north with accompanying annotation.
Panoramic photograph from the southern rim of Mount St. Helens' crater rim looking north with accompanying annotation.
View the annotated version of this photograph.
View the annotated version of this photograph.
View northward from Mount St. Helens' crater rim, July 2006.
View northward from Mount St. Helens' crater rim, July 2006.
View the annotated image.
Helicopter flying toward lava spine at Mount St. Helens to collect rocks—note the "Jaws" collector hanging underneath. April 28, 2007
Helicopter flying toward lava spine at Mount St. Helens to collect rocks—note the "Jaws" collector hanging underneath. April 28, 2007
Due to the cataclysmic eruption of May 18, 1980, many of the locations annotated on this map are now either covered or no longer visible.
Due to the cataclysmic eruption of May 18, 1980, many of the locations annotated on this map are now either covered or no longer visible.
Mount Adams, Washington as seen from Mount St. Helens (west). Trees are covered in frost in the foreground.
Mount Adams, Washington as seen from Mount St. Helens (west). Trees are covered in frost in the foreground.
Loowit Falls flows north out of Mount St. Helens crater. White building in upper right corner is the Loowit gage house, which contains an Acoustic Flow Monitor.
Loowit Falls flows north out of Mount St. Helens crater. White building in upper right corner is the Loowit gage house, which contains an Acoustic Flow Monitor.
South-facing aerial view of Mount St. Helens with Mount Hood (left) and Mount Jefferson (right) on the horizon. June 8, 2005.
South-facing aerial view of Mount St. Helens with Mount Hood (left) and Mount Jefferson (right) on the horizon. June 8, 2005.
Juvenile herring with classic signs of VHS including focal hemorrhaging around the eyes, mouth, and fin bases.
Juvenile herring with classic signs of VHS including focal hemorrhaging around the eyes, mouth, and fin bases.
Researcher, works at the microscope, Marrowstone Marine Field Station, Nordland, WA.
Researcher, works at the microscope, Marrowstone Marine Field Station, Nordland, WA.
Ash collection from east Crater Glacier on Mount St. Helens with a dredge attached to a helicopter cable. Ash is analyzed to help scientists understand eruption characteristics.
Ash collection from east Crater Glacier on Mount St. Helens with a dredge attached to a helicopter cable. Ash is analyzed to help scientists understand eruption characteristics.
The May 18, 1980 eruption of Mount St. Helens began with an enormous landslide that slammed into Spirit Lake, blocking its natural outlet and raising the lake level by 197 feet.
The May 18, 1980 eruption of Mount St. Helens began with an enormous landslide that slammed into Spirit Lake, blocking its natural outlet and raising the lake level by 197 feet.
Weighing a juvenile white sturgeon. Columbia River, bottom trawl for yoy indexing.
Weighing a juvenile white sturgeon. Columbia River, bottom trawl for yoy indexing.
Juvenile white sturgeon held by human hand. Columbia River, bottom trawl for yoy indexing.
Juvenile white sturgeon held by human hand. Columbia River, bottom trawl for yoy indexing.