EMMET GOWIN (bn. 1941)
Mount St. Helens or Louwala-Clough (2, 549 m - 8, 363 ft)
United States of America (Washington State)
1. Debris flow at the northern base of Mounts Helens, 1980
2. Ash over new snow on the South flank of Mount St Helens, 1982
3. Ashes after Mount St Helens 1980 Plinian eruption, 1982
Mount St. Helens ( 2, 549m- 8,363 ft ) or Louwala-Clough (known as Lawetlat'la to the Cowlitz people, and Loowit to the Klickitat people) is an active stratovolcano located in Skamania County, Washington, in the Pacific Northwest region of the United States. It is 96 miles (154 km) south of Seattle, Washington, and 50 miles (80 km) northeast of Portland, Oregon. Mount St. Helens takes its English name from the British diplomat Lord St Helens, a friend of explorer George Vancouver who made a survey of the area in the late 18th century.The volcano is located in the Cascade Range and is part of the Cascade Volcanic Arc, a segment of the Pacific Ring of Fire that includes over 160 active volcanoes. This volcano is well known for its ash explosions and pyroclastic flows.
Mount St. Helens is most notorious for its major 1980 eruption, the deadliest and most economically destructive volcanic event in the history of the United States. The magma in St. Helens burst forth into a large-scale pyroclastic flow that flattened vegetation and buildings over 230 square miles (600 km2). More than 1.5 million metric tons of sulfur dioxide were released into the atmosphere. On the Volcanic Explosivity Index scale, the eruption was rated a five (a Plinian eruption). Fifty-seven people were killed; 250 homes, 47 bridges, 15 miles (24 km) of railways, and 185 miles (298 km) of highway were destroyed. A massive debris avalanche triggered by an earthquake measuring 5.1 on the Richter scale caused an eruption that reduced the elevation of the mountain's summit from 9,677 ft (2,950 m) to 8,363 ft (2,549 m), leaving a 1 mile (1.6 km) wide horseshoe-shaped crater. The debris avalanche was up to 0.7 cubic miles (2.9 km3) in volume. For more than nine hours, a vigorous plume of ash erupted, eventually reaching 12 to 16 miles (20 to 27 km) above sea level. The plume moved eastward at an average speed of 60 miles per hour (100 km/h) with ash reaching Idaho by noon. Ashes from the eruption were found collecting on top of cars and roofs next morning, as far as the city of Edmonton in Alberta, Canada. The Mount St. Helens National Volcanic Monument was created to preserve the volcano and allow for its aftermath to be scientifically studied.
As with most other volcanoes in the Cascade Range, Mount St. Helens is a large eruptive cone consisting of lava rock interlayered with ash, pumice, and other deposits. The mountain includes layers of basalt and andesite through which several domes of dacite lava have erupted. The largest of the dacite domes formed the previous summit, and off its northern flank sat the smaller Goat Rocks dome. Both were destroyed in the 1980 eruption.
Between 1980 and 1986, activity continued at Mount St. Helens, with a new lava dome forming in the crater. Numerous small explosions and dome-building eruptions occurred. From December 7, 1989, to January 6, 1990, and from November 5, 1990, to February 14, 1991, the mountain erupted with sometimes huge clouds of ash.
Magma reached the surface of the volcano about October 11, 2004, resulting in the building of a new lava dome on the existing dome's south side. This new dome continued to grow throughout 2005 and into 2006. Several transient features were observed, such as a lava spine nicknamed the "whaleback," which comprised long shafts of solidified magma being extruded by the pressure of magma beneath. These features were fragile and broke down soon after they were formed. On July 2, 2005, the tip of the whaleback broke off, causing a rockfall that sent ash and dust several hundred meters into the air.
Mount St. Helens showed significant activity on March 8, 2005, when a 36,000-foot (11,000 m) plume of steam and ash emerged—visible from Seattle. This relatively minor eruption was a release of pressure consistent with ongoing dome building. The release was accompanied by a magnitude 2.5 earthquake. Another feature to emerge from the dome was called the "fin" or "slab." Approximately half the size of a football field, the large, cooled volcanic rock was being forced upward as quickly as 6 ft (2 m) per day.
In mid-June 2006, the slab was crumbling in frequent rockfalls, although it was still being extruded. The height of the dome was 7,550 feet (2,300 m), still below the height reached in July 2005 when the whaleback collapsed. On October 22, 2006, the collapse and avalanche of the lava dome sent an ash plume 2,000 feet (600 m) over the western rim of the crater; the ash plume then rapidly dissipated. On December 19, 2006, a large white plume of condensing steam was observed, leading some media people to assume there had been a small eruption. However, the Cascades Volcano Observatory of the USGS did not mention any significant ash plume. The volcano was in continuous eruption from October 2004, but this eruption consisted in large part of a gradual extrusion of lava forming a dome in the crater.
On January 16, 2008, steam began seeping from a fracture on top of the lava dome. Associated seismic activity was the most noteworthy since 2004. Scientists suspended activities in the crater and the mountain flanks, but the risk of a major eruption was deemed low.] By the end of January, the eruption paused; no more lava was being extruded from the lava dome.
On July 10, 2008, it was determined that the eruption had ended, after more than six months of no volcanic activity.
Source:
- Wikipedia
The photographer
Emmet Gowin (born 1941 in Danville, Virginia) is an American photographer. He first gained attention in the 1970s with his intimate portraits of his wife, Edith, and her family. Later he turned his attention to the landscapes of the American West, taking aerial photographs of places that had been changed by humans or nature, including the Hanford Site, Mount St. Helens(see below), and the Nevada Test Site. Gowin taught at Princeton University for 25 years.
After graduating from high school he attended the Richmond Professional Institute (now Virginia Commonwealth University). During his first year in college he saw a catalog of the Family of Man exhibit and was particularly inspired by the works of Robert Frank and Henri Cartier-Bresson.
In 1970 his work was shown at the George Eastman House and a year later at the Museum of Modern Art. About this same time he was introduced to the photographer Frederick Sommer, who became his lifelong mentor and friend. Gowin received a Guggenheim Fellowship in 1974, which allowed him to travel throughout Europe. He was also awarded a National Endowment for the Arts Fellowship in 1979 and a Pew Fellowship in the Arts in 1994.
In 1980 Gowin received a scholarship from the Seattle Arts Commission which provided funding for him to travel in Washington and the Pacific Northwest. Beginning with a trip to Mount St. Helens soon after it erupted, Gowin began taking aerial photographs (see below). For the next twenty years, Gowin captured strip mining sites, nuclear testing fields, large-scale agricultural fields and other scars in the natural landscape.
In 1982 the Gowins were invited by Queen Noor of Jordan, who had studied with Gowin at Princeton, to photograph historic places in her country. He traveled there over the next three years and took a series of photographs of the archaeological site at Petra. The prints he made of these images were the first time he introduced photographic print toning in his work.
Gowin retired from teaching at Princeton University at the end of 2009 and lives in Pennsylvania with his wife Edith.
Gowin once said that : "The coincidence of the many things that fit together to make a picture is singular. They occur only once. The never occur for you in quite the same way that they occur for someone else, so that in the tiny differences between them you can reemploy a model or strategy that someone else has used and still reproduce an original picture. Those things that do have a distinct life of their own strike me as being things coming to you out of life itself."
In an essay for the catalog for an exhibition of his work at Yale University, writer Terry Tempest Williams said "Emmet Gowin has captured on film the state of our creation and, conversely, the beauty of our losses. And it is full of revelations."
