Semisopochnoi Island - Wikipedia
Semisopochnoi Island or Unyak Island (obsolete Russian: Семисопочной, modern Russian: Семисопочный Semisopochny – "having seven hills"; Aleut: Unyax̂ [1]) is part of the Rat Islands group in the western Aleutian Islands of Alaska. The island is uninhabited and provides an important nesting area for maritime birds.
The Easternmost Point in North America Is Actually West of Alaska
2012年7月30日 · Semisopochnoi is the island’s Russian name, meaning “having seven hills”—the Aleut natives called it “Unyax.” Its namesake seven hills are actually volcanic peaks, since the whole island is...
Alaska Volcano Observatory | Semisopochnoi
2023年8月4日 · From Wood and Kienle (1990): "Semisopochnoi is the largest young volcanic island in the western Aleutians and is composed of a variety of volcanic landforms. Basaltic pyroclastic material built a shield of ~20 km wide (at sea level) which culminated in a post-glacial pumice and ash eruption of dacite and andesite, producing an 8-km-wide caldera.
Semisopochnoi Island, Alaska - NASA Earth Observatory
2010年12月29日 · Situated on the far end of the Aleutians, Semisopochnoi Island is simultaneously the most easterly and westerly point of the United States of America. Roughly 1,275 miles (2,050 kilometers) west-southwest of Anchorage, Alaska, Semisopochnoi lies near the 180-degree line of longitude, in the Rat Islands group in the western Aleutian Islands.
Semisopochnoi Island - Alaska Guide Co
Semisopochnoi Island in Detail. About. island, 13 mi. across, northeasternmost of Rat Islands., Aleutian Islands. History. Descriptive name derived from the Russian words "sem" meaning "seven," and "sopochka," meaning "extinct volcano"--seven volcanoes or seven peaks.
Semisopochnoi - Global Volcanism Program
The volcanic Semisopochnoi Island in the western Aleutian Islands contains a group of cones within a caldera complex (figure 5). The active Cerberus center has three summit craters, with the current activity originating from North Cerberus.
Semisopochnoi Island - volcanoes - Alaska Handbook
2021年6月28日 · Semisopochnoi, the largest subaerial volcano of the western Aleutians, is 20 km wide at sea level and contains a caldera 8 km wide that formed as a result of the collapse of a low-angle, dominantly basaltic volcano following the eruption of a large volume of dacitic pumice.
Alert Level Raised For Aleutian Islands Semisopochnoi Volcano - Forbes
2021年4月17日 · High-resolution satellite images show that Semisopochnoi - a volcano in Alaska's Aleutian Islands - erupted on Thursday, prompting officials to raise the alert level.
Postglacial eruptive history and geochemistry of Semisopochnoi …
Semisopochnoi Island, located in the Rat Islands group of the western Aleutian Islands and Aleutian volcanic arc, is a roughly circular island composed of scattered volcanic vents, the prominent caldera of Semisopochnoi volcano, and older, ancestral volcanic rocks.
Digital geologic map data for Semisopochnoi Island, Alaska
Semisopochnoi Island, located in the Rat Islands group of the western Aleutian Islands and Aleutian volcanic arc, is a roughly circular island composed of scattered volcanic vents, the prominent caldera of Semisopochnoi volcano, and older, ancestral volcanic rocks.
Semisopochnoi Island, the largest of the young volcanic islands of the western Aleutians, is the easternmost of the Rat Island group, and is near the southern extremity of the great Aleutian arc.
The Easternmost Point in North America Is Actually West of …
2021年2月17日 · The islands stretch across the longitude 180° and thus consist of the US's westernmost region by longitude (Amatignak Island) and the easternmost region by longitude (Semisopochnoi Island). The islands lie on the northernmost region of the Pacific Ring of Fire.
Semisopochnoi, Aleutian Islands, Alaska - Volcano World
Semisopochnoi, Aleutian Islands, Alaska Location: 51.9N, 179.6E Elevation: 4,005 feet (1,221 m) Semisopochnoi, the youngest volcanic island in the western Aleutians, made of a shield volcano, a caldera, and several younger stratovolcanoes.. Known eruptions occurred in 1873 and 1987. Four unconfirmed eruptions occurred between 1772 and 1830.
Semisopochnoi Island in Alaska: The Farthest East Point in the …
2024年1月4日 · Semisopochnoi Island is part of the Rat Islands group in the western Aleutian Islands of Alaska. The island is uninhabited and provides an important nesting area for maritime birds. It’s of volcanic origin, containing several volcanoes including Mount Young.
Postglacial eruptive history and geochemistry of Semisopochnoi …
2018年2月14日 · Semisopochnoi Island, located in the Rat Islands group of the western Aleutian Islands and Aleutian volcanic arc, is a roughly circular island composed of scattered volcanic vents, the prominent caldera of Semisopochnoi volcano, and older, ancestral volcanic rocks.
Semisopochnoi - World Islands
2024年1月6日 · Welcome to Semisopochnoi, a Polar island in the Bering Sea, part of the majestic Pacific Ocean. This guide offers a comprehensive overview of what makes Semisopochnoi unique – from its geography and climate to its population, infrastructure, and beyond.
Aleutian Adventure - Adak to Attu - Arctic Wild
2024年7月27日 · Glacier cloaked volcanoes including the currently smoking Semisopochnoi Island dot the horizon as we steam west and still further west. Other islands produce fumaroles, bubbling springs, and all manner of geothermal wonders not far from the beach.
Semisopochnoi Island Map - Aleutians West, Alaska - Mapcarta
Semisopochnoi Island Semisopochnoi Island or Unyak Island is part of the Rat Islands group in the western Aleutian Islands of Alaska. The island is uninhabited and provides an important nesting area for maritime birds.
Semisopochnoi Island Essential Tips and Information - Trek Zone
Semisopochnoi Island or Unyak Island is part of the Rat Islands group in the western Aleutian Islands of Alaska. The island is uninhabited and provides an important nesting area for maritime birds. The island is of volcanic origin, containing several volcanoes including Mount Cerberus.
Semisopochnoi Island - Detailed Pedia
Semisopochnoi Island or Unyak Island (obsolete Russian: Семисопочной, modern Russian: Семисопочный Semisopochny – "having seven hills"; Aleut: Unyax̂) is part of the Rat Islands group in the western Aleutian Islands of Alaska. The island is uninhabited and provides an important nesting area for maritime birds.
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