File:Lassen Peak, Lassen Volcanic National Park, California.jpg
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[edit]DescriptionLassen Peak, Lassen Volcanic National Park, California.jpg |
English: Lassen Peak, also known as Mount Lassen, is the southernmost active volcano in the Cascade Range. It is part of the Cascade Volcanic Arc which is an arc that stretches from southwestern British Columbia to northern California. Located in the Shasta Cascade region of Northern California, Lassen rises 2,000 ft (600 m) above the surrounding terrain and has a volume of 0.5 cu mi (2 km3), making it one of the largest lava domes on Earth. It was created on the destroyed northeastern flank of now gone Mount Tehama, a stratovolcano that was at least 1,000 ft (300 m) higher than Lassen Peak.
On May 22, 1915, a powerful explosive eruption at Lassen Peak devastated nearby areas, and spread volcanic ash as far as 200 mi (300 km) to the east. This explosion was the most powerful in a series of eruptions from 1914 through 1917. Lassen Peak and Mount St. Helens are the only two volcanoes in the contiguous United States to erupt during the 20th century. Lassen Volcanic National Park was created in Shasta County, Calif., to preserve the devastated areas as they were, for future observation and study, and to preserve the nearby volcanic features. Unlike most lava domes, Lassen Peak is topped by craters. A set of these craters exists around the summit of Lassen Peak, although two of them have been covered up by solidified lava and sulfur deposits. Lassen Peak is the largest of a group of more than 30 volcanoes that have erupted over the past 300,000 years in the Lassen Peak volcanic area. en.wikipedia.org/wiki/Lassen_Peak en.wikipedia.org/wiki/Wikipedia:Text_of_Creative_Commons_... |
Date | Taken on 12 June 2004, 13:54:40 |
Source | https://www.flickr.com/photos/kenlund/93377289/ |
Author | Ken Lund |
Camera location | 40° 28′ 03.18″ N, 121° 30′ 43.53″ W | View this and other nearby images on: OpenStreetMap | 40.467551; -121.512093 |
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This image was originally posted to Flickr by Ken Lund at https://flickr.com/photos/75683070@N00/93377289. It was reviewed on 25 July 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-sa-2.0. |
25 July 2022
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current | 09:23, 25 July 2022 | 1,280 × 960 (195 KB) | Safeguarding (talk | contribs) | Uploaded a work by Ken Lund from https://www.flickr.com/photos/kenlund/93377289/ with UploadWizard |
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Metadata
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot A70 |
Exposure time | 1/1,000 sec (0.001) |
F-number | f/6.3 |
Date and time of data generation | 13:54, 12 June 2004 |
Lens focal length | 7.84375 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
File change date and time | 13:54, 12 June 2004 |
Y and C positioning | Centered |
Exif version | 2.2 |
Date and time of digitizing | 13:54, 12 June 2004 |
Meaning of each component |
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Image compression mode | 5 |
APEX shutter speed | 9.96875 |
APEX aperture | 5.3125 |
APEX exposure bias | 0 |
Maximum land aperture | 3.34375 APEX (f/3.19) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 9,846.1538461538 |
Focal plane Y resolution | 9,846.1538461538 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Landscape |