<P> Tseax Cone, a young cinder cone at the southernmost end of the Northern Cordilleran Volcanic Province, was the source for a major basalt lava flow eruption around the years 1750 and 1775 that travelled into the Tseax River, damming it and forming Lava Lake . The lava flow subsequently travelled 11 kilometres (7 mi) north to the Nass River, where it filled the flat valley floor for an additional 10 kilometres (6 mi), making the entire lava flow 22.5 kilometres (14.0 mi) long . Native legends from Nisga'a people in the area tell of a prolonged period of disruption by the volcano, including the destruction of two Nisga'a villages known as Lax Ksiluux and Wii Lax K'abit . Nisga'a people dug pits for shelter but at least 2,000 Nisga'a people were killed due to volcanic gases and poisonous smoke (most likely carbon dioxide). This is Canada's worst known geophysical disaster . It is the only eruption in Canada for which legends of First Nations people have been proven true . As of 1993, the Tseax Cone quietly rests in Nisga'a Memorial Lava Beds Provincial Park . </P> <P> An eruption was reported by placer miners on November 8, 1898 in the Atlin Volcanic Field of the Northern Cordilleran Volcanic Province adjacent to Ruby Mountain volcano 80 kilometres (50 mi) south of Gladys Lake when volcanic ash was said to be falling for many days . During the eruption the adjacent placer miners were able to work at nights due to incandescent glow from the eruption . A news report published on December 1, 1898 by the American newspaper publisher The New York Times stated: Kinslee and T.P. James, Denver mining men who with Col. Hughes of Rossland have just returned from Alaska, report that a volcano is in active eruption about fifty miles from Atlin City . No name has yet been given to the volcano, but the officials of Atlin are preparing for a trip of inspection and will christen it . It is said to be the second in a string of four mountains lying fifty miles due south of Lake Gladys, all of which are more than 1,400 feet high . In 1898 the Atlin area was in dispute with the Alaska - British Columbia boundary, leading American news broadcasters stating the Atlin area was in Alaska rather than in northwestern British Columbia . This Alaska - British Columbia boundary dispute was eventually resolved by arbitration in 1903 and no evidence for the 1898 eruption has been found, leading researchers to speculate about the eruption and report it as uncertain . </P> <P> The Volcano at the southern end of the Northern Cordilleran Volcanic Province just north of the Alaska - British Columbia boundary is probably the youngest in Canada . It is a poorly built cinder cone made of loose volcanic ash, lapilli - sized tephra and volcanic bombs . Lying above a remote mountain ridge in the Boundary Ranges of the Coast Mountains, it is responsible for lava flow eruptions in 1904 and older that traveled south 5 kilometres (3 mi) through river valleys where they crossed the border into the U.S. state of Alaska and dammed the Blue River, a short tributary of the Unuk River . In doing so it formed several small lakes . This eruption had a massive effect on fish, plant and animal inhabitants of the valley, but there is no record of its impact on people, most likely because people were not in the remote area . The entire length of the lava flows are at least 22 kilometres (14 mi) and still contain the original lava features from when they were erupted, including pressure ridges and lava channels . However, sections of the lava flows have collapsed into underlying lava tubes to form cavities . Tephra and scoria from The Volcano covers adjacent mountain ridges and even through it is very young, it has been reduced by erosion from alpine glacial ice found in the heavily glaciated Coast Mountains . The estimated volume of lava and ash from The Volcano is 2.2 km (1 cu mi). </P> <P> A series of earthquakes of less than magnitude 3.0 were recorded by seismographs in the Baezaeko River region 20 kilometres (12 mi) west of Nazko Cone in the Anahim Volcanic Belt on October 9, 2007 . The cause of these earthquakes was magma intruding into rock 25 kilometres (16 mi) below the surface . Since then more than 1,000 small earthquakes have been recorded . Because of the small size of the earthquake swarms, Natural Resources Canada has added more seismographs in the region for better location and depth accuracy . However, the size and number of the 2007 earthquake swarms indicate there is currently no threat of an eruption . Before magma could erupt in the area adjacent to Nazko Cone, it is expected the size and number of the earthquakes would rise considerably, presaging an eruption . </P>

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