2001 EARTH SCIENCE VIDEOTAPES |
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Tape Title | Record ID | Date Produced | TRT: |
Synopsis |
| SATELLITE VIEWS OF SEATTLE REGION | G01-018 | 03/01/01 | 00:07:27 | These satellite images provide a unique perspective on the Seattle region that was rocked by a powerful earthquake on Wednesday, February 28, 2001. According to seismologists at the U.S. Geological Survey, the 6.8 magnitude quake was centered along the coast of Puget Sound between Olympia and Seattle and was centered about 30 miles underground. The Seattle quake is believed to have been the result of tectonic plate subduction in which one slab of the Earth's crust slides under another slab.
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TAPE CONTENTS: |
| ITEM (1): Landsat Satellite Views of Seattle - This view of Seattle was taken by the Landsat-5 satellite. The data for this sequence was acquired on June 22, 1991. The images were draped over a digital elevation map which was amplified by a factor of two. The images were rendered by the Scientific Visualization Studio at the Goddard Space Flight Center. Courtesy: NASA/USGS
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| ITEM (2): Landsat Satellite View of Pacific Northwest - The data for this sequence was collected by the Landsat-5 satellite on May 6, 1992. The images were draped over a digital elevation map which was amplified by a factor of two. The images were rendered by the Scientific Visualization Studio at the Goddard Space Flight Center. Courtesy: NASA/USGS
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| ITEM (3): SeaWiFS' Zoom to Seattle
- NASA's SeaWiFS (Sea-viewing Wide Field-of-View Sensor) instrument recorded these view of the Seattle/Vancouver region on May 28, 1998, and August 9, 1998. The SeaWiFS sensor is carried aboard the OrbView-2 satellite. Courtesy: NASA/ORBIMAGE
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| ITEM (4): Earth's Tectonic Plates
- The Earth is formed of several layers that have very different physical and chemical properties. The outer layer, which averages about 30 miles in thickness, consists of about a dozen large, irregularly shaped plates that slide over, under and past each other on top of the partly molten inner layer. Most earthquakes occur at the boundaries where the plates meet. In fact, the locations of earthquakes and the kinds of ruptures they produce help scientists define the plate boundaries. Earthquakes that occur along the plates are shown in yellow, the plate boundaries are shown in blue, and volcanos are shown in red.
Courtesy: NASA/USGS
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Earth Science Gallery