Mount Spurr continued to rumble this week, but scientists at the Alaska Volcano Observatory reported no sign that the 11,070-foot volcano about 80 miles west of Anchorage was about to erupt, according to updates released on Friday.
Seismic listening devices recorded about 90 earthquakes beneath the volcano during the week, all within 18 miles of the summit. Scientists also installed three new seismic stations on the volcano's snowy flanks to help monitor movement of magma deep underground. Three new global positioning system units were also installed to detect whether the volcano's surface starts to swell.
The observatory, which monitors 27 volcanoes along the Aleutian Arc, also reported tremors beneath Mount Veniaminof on the Alaska Peninsula and Shishaldin Volcano on Unimak Island. For more information, and an Alaska volcano atlas, check out