Idaho on the 9th inst, sending forth fire and smoke hundreds of feet in hight, and throwing rocks into the air which lit several miles from the scene of eruption. Volcanic Rumblings In The Cascades? ... Real-time rumblings. By far the greatest danger to people and property from Cascades volcanoes are lahars — volcanic mudflows triggered when eruptions collapse slopes and melt glaciers. --Lewiston, I.T., Aug. 16. New biometric database can identify people through scars, tattoos and even their voice Cattle Are Being Mutilated And Killed In Eastern Oregon Insider Interview on Skinwalker Ranch History VOLCANO IN IDAHO. The Cascades Volcano Observatory's name suggests an entirely Northwest focus. Seismic data for Mount Rainier and other Cascade Range volcanoes are available from the Pacific Northwest Seismic Network and Activity Updates for volcanoes in the Cascade Volcano Observatory's area of responsibility are posted weekly. On May 22, 1915, a large explosive eruption at the summit of Lassen Peak, California, the southernmost active volcano in the Cascade Range, devastated nearby areas and rained volcanic ash as far away as 280 miles to the east. The file cabinets in John Ewert's office suggest otherwise. The USGS ranks Glacier Peak among the country’s highest-threat volcanoes. Such swarms are thought to occur due to minor changes in the hydrothermal system of the volcano. But the only monitoring is done by a single seismometer southwest of the summit — far less instrumentation than on any other Cascade volcano. Because the population of the Pacific Northwest is rapidly increasing, the Cascade volcanoes are some of the most dangerous, due to their eruptive history and potential for future eruptions, and because they are underlain by weak, hydrothermally altered volcanic rocks that are susceptible to failure. -- A volcanic eruption occurred in the mountains about twenty miles east of Mt. Glacier Peak volcano under monitored.