File:Yellowstone STS068-247-61.jpg

DescriptionYellowstone STS068-247-61.jpg	Yellowstone National Park, the largest national park in the United States, and Yellowstone Lake, the largest high-mountain lake in North America [139 square miles (360 square kilometers)], are featured in this west-southwest-looking, low-oblique photograph. The park lies atop a massive, dish-shaped, volcanic caldera approximately 30 miles (48 kilometers) by 45 miles (72 kilometers) in size. The caldera was partially filled by lava that flowed from the cracks and opening floor after the massive eruption and collapse of the volcano approximately 600 000 years ago—an eruption 1000 times the force of the 1980 eruption of Mount Saint Helens Volcano in Washington. With approximately 10 000 geysers and hot springs, Yellowstone sits on one of the hottest "hot spots" on Earth. Between 1923 and 1985, the caldera rose almost 4 feet (1 meter) in height. Since 1985, the caldera has sunk approximately 6 inches (15 centimeters). Visible are portions of the volcanic Absaroka Range to the east and three smaller lakes near Yellowstone Lake—Shoshone, to the southwest; Lewis, southeast of Shoshone; and Heart Lake, the smallest and most southeastern.
Date	30 September 1994
Source	http://earth.jsc.nasa.gov/sseop/efs/photoinfo.pl?PHOTO=STS068-247-61
Author	NASA

This image or video was catalogued by one of the centers of the United States National Aeronautics and Space Administration (NASA) under Photo ID: STS068-247-61.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.

Other languages:

	This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."