|
Alaska Volcano Observatory
The Alaska Volcano Observatory (AVO) is a joint program of the United States Geological Survey, the Geophysical Institute of the University of Alaska Fairbanks, and the State of Alaska Division of Geological and Geophysical Surveys (ADGGS). AVO was formed in 1988, and uses federal, state, and university resources to monitor and study Alaska's volcanology, hazardous volcanoes, to predict and record eruptive activity, and to mitigate volcanic hazards to life and property. The Observatory website allows users to monitor active volcanoes, with seismographs and webcameras that update regularly. AVO now monitors more than 20 volcanoes in Cook Inlet, which is close to Alaskan population centers, and the Aleutian Arc due to the hazard that plumes of ash pose to aviation. AVO operates out of two locations. One is at the U.S. Geological Survey office on the campus of Alaska Pacific University in Anchorage. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anchorage, Alaska
Anchorage () is the largest city in the U.S. state of Alaska by population. With a population of 291,247 in 2020, it contains nearly 40% of the state's population. The Anchorage metropolitan area, which includes Anchorage and the neighboring Matanuska-Susitna Borough, had a population of 398,328 in 2020, accounting for more than half the state's population. At of land area, the city is the fourth-largest by area in the United States and larger than the smallest state, Rhode Island, which has . Anchorage is in Southcentral Alaska, at the terminus of the Cook Inlet, on a peninsula formed by the Knik Arm to the north and the Turnagain Arm to the south. In September 1975, the City of Anchorage merged with the Greater Anchorage Area Borough, creating the Municipality of Anchorage. The municipal city limits span , encompassing the urban core, a joint military base, several outlying communities, and almost all of Chugach State Park. Because of this, less than 10% of the Mun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fox Islands (Alaska)
The Fox Islands (russian: Лисьи острова) are a group of islands in the eastern Aleutian Islands of the U.S. state of Alaska. The Fox Islands are the closest to mainland North America in the Aleutian chain, and just east of Samalga Pass and the Islands of Four Mountains group. Inhabited by the Aleut for centuries, the islands, along with the rest of the Aleutians, were first visited by Europeans in 1741, when a Danish navigator employed by the Imperial Russian Navy, Vitus Bering, was searching for new sources of fur for Russian fur trappers. Foggy almost all year round, the islands are difficult to navigate due to constantly adverse weather and numerous reefs. The Fox Islands Passes are the waterways surrounding the islands. As with the other Aleutian islands, the Fox Islands are prone to frequent earthquakes year-round. The larger Fox Islands are, from west to east, Umnak, Unalaska, Amaknak, Akutan, Akun, Unimak and Sanak. Islands lying west of Akutan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Clark National Park And Preserve
Lake Clark National Park and Preserve is an American national park in southwest Alaska, about southwest of Anchorage. The park was first proclaimed a national monument in 1978, then established as a national park and preserve in 1980 by the Alaska National Interest Lands Conservation Act. The park includes many streams and lakes vital to the Bristol Bay salmon fishery, including its namesake Lake Clark. A wide variety of recreational activities may be pursued in the park and preserve year-round. The park protects rainforests along the coastline of Cook Inlet, alpine tundra, glaciers, glacial lakes, major salmon-bearing rivers, and two volcanoes, Mount Redoubt and Mount Iliamna. Mount Redoubt is active, erupting in 1989 and 2009. The wide variety of ecosystems in the park mean that virtually all major Alaskan animals, terrestrial and marine, may be seen in and around the park. Salmon, particularly sockeye salmon, play a major role in the ecosystem and the local economy. Large pop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chigmit Mountains
The Chigmit Mountains are a subrange of the Aleutian Range in the Kenai Peninsula and Lake and Peninsula Boroughs of the U.S. state of Alaska. Location They are located at the northeastern end of the Aleutian range, on the west side of Cook Inlet, roughly 120 miles (200 km) southwest of Anchorage. The closest major towns to the range are Kenai and Homer, across Cook Inlet on the west side of the Kenai Peninsula. To the north, the Chigmits are bordered by the Tordrillo Mountains, and on the northwest, by the Neacola Mountains. Cook Inlet marks the eastern boundary of the range, while on the west, the mountains fade out into the hills and lowlands of Lake Clark National Park and Preserve. On the south and southwest, the Chigmits abut the continuation of the Aleutian Range into the Alaska Peninsula. Geological composition The Chigmits, along with most of the Aleutian Range, are volcanic, and include two prominent stratovolcanoes, Redoubt Volcano (10,197 feet/3,108 m), th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Iliamna Volcano
Iliamna Volcano, or Mount Iliamna ( Dena'ina: ''Ch’naqał’in''; Sugpiaq: ''Puyulek''), is a glacier-covered stratovolcano in the largely volcanic Aleutian Range in southwest Alaska. Located in the Chigmit Mountain subrange in Lake Clark National Park and Preserve, the volcano lies approximately southwest of Anchorage on the west side of lower Cook Inlet. It is the 25th most prominent peak in the United States.Alaska Volcano Observatory, Volcano Information - Iliamna Retrieved Dec. 16, 2022. 
The volcano's glaciers have extensively altered its profile, ...
[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Great Sitkin Island
Great Sitkin Island ( ale, Sitх̑naх̑; russian: Большой Ситкин) is a volcanic island in the Andreanof Islands of the Aleutian Islands of Alaska. The island covers a total area of and lies slightly north of a group of islands which are located between Adak Island and Atka Island. The northern portion of the island is dominated by the complex Great Sitkin Volcano which rises to a height of . The island is long and wide. History Great Sitkin was the site of a fuel depot during World War II, Sand Bay Naval Station, construction finished on May 15, 1943, and included accommodations for up to 680 men and consisted of 26 fuel oil tanks, three 6,000 barrel tanks, 22 10,000 barrel tanks and one 15,000 barrel tank and were surrounded by berms in case of attack or spills. The Naval Station had only around 10 people supporting it by 1949, but was in operation until 1963 and the remains of the oil tanks are still on the island and are an environmental hazard. Starting in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unimak Island
Unimak Island ( ale, Unimax, russian: Унимак) is the largest island in the Aleutian Islands chain of the U.S. state of Alaska. Geography It is the easternmost island in the Aleutians and, with an area of , the ninth largest island in the United States and the 134th largest island in the world. It is home to Mount Shishaldin, one of the ten most active volcanoes in the world. According to the United States Census Bureau, there were 64 people living on Unimak as of the 2000 census, all of them in the city of False Pass at the eastern end of the island. Cape Lutke is a headland on the island. Cape Pankof is located at the extreme southwest of the island. The Fisher Caldera is a volcanic crater in the west-central part of Unimak. Some characteristics include many volcanic cones and undrained lakes. It is named for Bernard Fisher, a U.S. Geological Survey geologist who was killed in Umnak Pass. Mount Westdahl, in elevation, is a stratovolcano of the Aleutian Range on t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fisher Caldera
Fisher Caldera, also known as Mount Fisher and Fisher Volcano, is a large volcanic caldera, measuring about by , located on Unimak Island in the Aleutian Islands of Alaska. Formed by the destructive eruption of an andesitic stratovolcano about 9,100 years ago, it contains three crater lakes, one wide and two others about wide. Small peaks rising and are also present in the caldera. Fisher Caldera is located just from the Mount Westdahl volcano. The largest volcanic eruption on Earth during the Holocene Epoch In chronology and periodization, an epoch or reference epoch is an instant in time chosen as the origin of a particular calendar era. The "epoch" serves as a reference point from which time is measured. The moment of epoch is usually decided by ... (the last 11,700 years) occurred at Fisher Caldera in 8700 BCE. References External links * See also * List of volcanic craters in Alaska * List of volcanoes in the United States Volcanoes of Alaska Unimak I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Augustine Volcano
Augustine Volcano ( Sugpiaq: ''Utakineq'';https://uafanlc.alaska.edu/Online/G977K1985a/G977K1985a_02.PDF Dena'ina: ''Chu Nula'') is a lava dome volcano in Alaska consisting of a central complex of summit lava domes and flows surrounded by an apron of pyroclastic, lahar, avalanche, and ash deposits. The volcano is frequently active, with major eruptions recorded in 1883, 1935, 1963–64, 1976, 1986, and 2006. Minor eruptive events were reported in 1812, 1885, 1908, 1944, and 1971. The large eruptions are characterized by an explosive onset followed by the quieter effusion of lava. It forms Augustine Island in southwestern Cook Inlet in the Kenai Peninsula Borough of southcentral coastal Alaska, southwest of Anchorage. Augustine Island has a land area of , while West Island, just off Augustine's western shores, has . The irregular coastline of Augustine Island is due to the repeated catastrophic collapse of the summit dome, forming debris avalanches down the flanks and into Cook ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andreanof Islands
The Andreanof Islands ( ale, Niiĝuĝim tanangis, russian: Андреяновские острова) are a group of islands in the Aleutian Islands in southwestern Alaska. They are located at about 52° North and 172°57' to 179°09' West. Geography The Andreanof Islands are located between Amchitka Pass and the Rat Islands group to the west, and Amukta Pass and the Islands of Four Mountains group to the east. The islands extend about 275 miles (440 km). The total land area of all islands (including the Delarof Islands) is 1,515.349 sq mi (3,924.737 km2). The total population was 412 persons as of the 2000 census, the vast majority in the city of Adak on Adak Island. Islands The Delarof Islands are a subgroup of the Andreanof Islands group as well as the westernmost islands in the group. The largest islands in the group are, from west to east, Gareloi Island, Tanaga Island, Kanaga, Adak Island, Kagalaska Island, Great Sitkin Island, Atka Island, Amlia, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atka Island
Atka Island ( ale, Atx̂ax̂, russian: Атка остров) is the largest island in the Andreanof Islands of the Aleutian Islands of Alaska. The island is east of Adak Island. It is long and wide with a land area of , making it the 22nd largest island in the United States. The northeast of Atka Island contains the Korovin volcano which reaches a peak of . Oglodak Island is located off Cape Kigun, Atka's westernmost point. The city of Atka, Alaska is on the east side of the island. The 2000 census population of the island was 95 persons, almost all in the city of Atka.Atka Island: Blocks 1085 thru 1100 and Block 1103, Census Tract 1, Aleutians West Census Area, Alaska United States Census Bureau On December 5, 2008, [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Korovin Volcano
Korovin Volcano is one of four volcanic centers of the Atka Volcanic Complex, located near the town of Atka on the northeast part of Atka Island in the Aleutian Islands chain, Alaska, United States.Alaska Volcano Observatory, Volcano Information – Korovin Retrieved Dec. 17, 2022. At , Korovin is the highest point on the island.Smithsonian Institution, Global Volcanism Program – Atka Volcanic Complex Retrieved Dec. 17, 2022. Other cones of the Atka Volcanic Complex include Mount Kliuchef at , Konia Volcano at and Sarichef Volcano at along with the Atka ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
