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Filters: Tags: MSH-Hoblitt, R.P. Collection (X)

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Slide description and index card: Aerial view of Mount St. Helens southwest flank: "Two-Fingers" lava flow left of center, "Mitten" lava flow right of center. Skamania County, Washington. September 28, 1979. (Part of plane visible in upper left corner).
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Slide description and index card: Aerial view northeasterly across northwest flank of Mount St. Helens and canyon of South Fork Toutle River. Skamania County, Washington. September 28, 1979. (Part of plane wing visible at left).
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Slide description: Nearer aerial view of summit of Mount St. Helens, looking toward the northeastward of the two craters; septum still exists between the two. Skamania County, Washington. April 2, 1980. No index card available.
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Slide description and index card: Aerial view of Mount St. Helens, looking south over "Floating Island" lava flow. Skamania County, Washington. September 28, 1979.
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Slide description: Oblique aerial view of Mount St. Helens summit: phreatic eruption - ash fall and as cloud at right, relatively clean snow in foreground. Skamania County, Washington. April 10, 1980. No index card available.
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Album caption: Oblique aerial view of Mount St. Helens amphitheater as viewed from the north on July 22, 1980, sequence (9A-G) (photos nos. 17-23), showing the formation of a pyroclastic density flow during the early part of the third eruptive pulse. A, 1900:59; B, 1901:03 PDT, timed photographs by the author; C, 1901:08 PDT, photo by Harry X. Glicken, time from comparison with a timed photograph that is not shown; D,E,F,G, untimed sequence taken within 30 seconds after C, by Harry X. Glicken. Skamania County. Washington. (See also MSH-July 22, 1980 nos. 69ct-75ct) Published as figure 9-D in U.S. Geological Survey. Professional paper 1335. 1986. Index card unavailable.
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Slide description and index card: Young tephra sequence 8 km southeast of the former summit. Pale dacite tephras (sets Y and P) are overlain by tephras of Castle Creek and younger periods that include dark andesite tephras of layers Bh and Bo, pale dacite pumice of layer Bi that is about 1,000 yr old, dark basalt tephras of layer Bu, and white dacite pumice of set W. Skamania County, Washington. n.d. (Photo by R.P. Hoblitt). Published as Figure 5 in U.S. Geological Survey. Professional Paper 1250. 1981.
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Slide description: Near oblique aerial view of craters and ash-rich eruption plumes. Skamania County, Washington. April 2, 1980. (Part of plane visible at center and lower right). No index card available.
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Slide description and index card (70ct, 81ct): Mount St. Helens in eruption. Oblique aerial view of Mount St. Helens from the west. Photos are within seconds of each other. 16:33 hrs. Skamania County, WAshington. May 18, 1980. (Tip of plane wing at left).
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Slide description: Oblique aerial view across summit crater. Helicopter in view at right. 1509 hrs. Skamania County, Washington. April 10, 1980. No index card available.
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Slide description: Oblique aerial view of southwest flank of Mount St. Helens. Ash being deflated from flank by strong winds. Skamania County, Washington. April 2, 1980. (Plane wing visible at left).
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Slide description: Similar oblique aerial view of southeast side of Mount St. Helens - ash being deflated from southwest flank. Skamania County, Washington. April 2, 1980. (Part of plane wing visible at right).
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Album caption: Oblique aerial view of Mount St. Helens amphitheater as viewed from the north on July 22, 1980, sequence (9A-G) (photos nos. 17-23), showing the formation of a pyroclastic density flow during the early part of the third eruptive pulse. A, 1900:59; B, 1901:03 PDT, timed photographs by the author; C, 1901:08 PDT, photo by Harry X. Glicken, time from comparison with a timed pgotograph that is not shown; D,E,F,G untimed sequence taken within 30 seconds after C, Harry X. Glicken. Skamania County, Washington. (See also MSH-July 22, 1980 nos. 69ct-75ct) Published as figure 9-B in U.S. Geological Survey. Professional paper 1335. 1986. Index card unavailable.
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Album caption: Oblique aerial view of Mount St. Helens as viewed from the north sequence (4A-J) showing about the first 30 seconds of the second eruptive pulse of July 22, 1980. Photographer 4A-J (photos nos. 3-12) taken at about 3-second intervals beginning at 1825:20±5 PDT; photograph 4J taken about 6 seconds after 4I. Arrow (4H) indicates projection from pyroclastic fountain. Dashed line (4H) indicates front of pyroclastic density flow. Skamania County, Washington. (Photos by J.W. Vallance; graphics on published photos only; see also MSH-July 22, 1980 nos. 5ct-15ct in USGS Photo Library) Published as figure 4-B in U.S. Geological Survey. Professional paper 1335. 1986. Index card unavailable.
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Album caption: Oblique aerial view of Mount St. Helens as viewed from the north, sequence (4A-J) showing about the first 30 seconds of the second eruptive pulse of July 22, 1980. Photographs 4A-J (photos nos. 3-12) taken at about 3-second intervals beginning at 1825:20±5 PDT; photograph 4J taken about 6 second after 4I. Arrow (4H) indicates projection from pyroclastic fountain. Dashed line (4H) indicates front of pyroclastic density flow. Skamania County, Washington. (Photos by J.W. Vallance; graphic on published photos only; see also MSH-July 22, 1980 nos. 5ct-15ct in USGS Photo Library) Published as figure 4-C in U.S. Geological Survey. Professional paper 1335. 1986. Index card unavailable.
map background search result map search result map Young tephra sequence 8 km southeast of the former Mount St. Helens summit. Skamania County, Washington. n.d. Aerial view northeast across northwest flank of Mount St. Helens and canyon of South Fork Toutle River. Skamania County, Washington. 1979. Aerial view of Mount St. Helens summit region. Goat Rocks dome near center. Skamania County, Washington. 1979. Oblique aerial view of Mount St. Helens in eruption, viewed from the west. Skamania County, Washington. 1980. Oblique aerial view of southwest flank of Mount St. Helens. Skamania County, Washington. 1980. Oblique aerial view of southeast side of Mount St. Helens. Skamania County, Washington. 1980. Near oblique aerial view of Mount St. Helens craters and ash-rich eruption plumes. Skamania County, Washington. 1980. Oblique aerial view showing both craters at Mount St. Helens summit and septum separating them. Skamania County, Washington. 1980. Oblique aerial view of Mount St. Helens summit phreatic eruption. Skamania County, Washington. 1980. Oblique aerial view looking easterly at Mount St. Helens summit and phreatic eruption. Skamania County, Washington. 1980. Oblique aerial view looking easterly at Mount St. Helens summit and phreatic eruption. Skamania County, Washington. 1980. Oblique aerial view looking southeast, Mount St. Helens phreatic eruption plume continuing to build. Skamania County, Washington. 1980. Oblique aerial view across Mount St. Helens summit crater. Skamania County, Washington. 1980. Near aerial view of summit of Mount St. Helens. Skamania County, Washington. 1980. Young tephra sequence 8 km southeast of the former Mount St. Helens summit. Skamania County, Washington. n.d. Aerial view northeast across northwest flank of Mount St. Helens and canyon of South Fork Toutle River. Skamania County, Washington. 1979. Aerial view of Mount St. Helens summit region. Goat Rocks dome near center. Skamania County, Washington. 1979. Oblique aerial view of Mount St. Helens in eruption, viewed from the west. Skamania County, Washington. 1980. Oblique aerial view of southwest flank of Mount St. Helens. Skamania County, Washington. 1980. Oblique aerial view of southeast side of Mount St. Helens. Skamania County, Washington. 1980. Near oblique aerial view of Mount St. Helens craters and ash-rich eruption plumes. Skamania County, Washington. 1980. Oblique aerial view showing both craters at Mount St. Helens summit and septum separating them. Skamania County, Washington. 1980. Oblique aerial view of Mount St. Helens summit phreatic eruption. Skamania County, Washington. 1980. Oblique aerial view looking easterly at Mount St. Helens summit and phreatic eruption. Skamania County, Washington. 1980. Oblique aerial view looking easterly at Mount St. Helens summit and phreatic eruption. Skamania County, Washington. 1980. Oblique aerial view looking southeast, Mount St. Helens phreatic eruption plume continuing to build. Skamania County, Washington. 1980. Oblique aerial view across Mount St. Helens summit crater. Skamania County, Washington. 1980. Near aerial view of summit of Mount St. Helens. Skamania County, Washington. 1980.