Cascade Range Current Updates
November 2008

Cascade Range Volcanoes
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN

Activity Update: All volcanoes in the Cascade Range are at normal levels of background seismicity. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in Washington State; Mount Hood, Mount Jefferson, Three Sisters, Newberry Volcano, and Crater Lake, in Oregon; and Medicine Lake volcano, Mount Shasta, and Lassen Peak in northern California. Mount St. Helens has been at Volcano Alert Level NORMAL (Aviation Color Code GREEN) since July 10, 2008, a change assigned 5-6 months after the late January cessation of its 2004-2008 eruption.

Recent Observations: Volcano seismicity at Mount St. Helens and elsewhere along the Cascades has remained at low levels over the past week.

Cascade Range Volcanoes
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN

Activity Update: All volcanoes in the Cascade Range are at normal levels of background seismicity. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in Washington State; Mount Hood, Mount Jefferson, Three Sisters, Newberry Volcano, and Crater Lake, in Oregon; and Medicine Lake volcano, Mount Shasta, and Lassen Peak in northern California. Mount St. Helens has been at Volcano Alert Level NORMAL (Aviation Color Code GREEN) since July 10, 2008, a change assigned 5-6 months after the late January cessation of its 2004-2008 eruption.

Recent Observations: Volcano seismicity at Mount St. Helens and elsewhere along the Cascades has remained at low levels over the past week. On November 17, a small swarm of earthquakes was initiated by a M1.8 shock beneath the summit of Mount Hood. A new data link was established between CVO and the Pierce County Emergency Operations Center in Tacoma to access real-time data streams from two new seismic/deformation monitoring stations located on the west flank of Mount Rainier.

Cascade Range Volcanoes
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN

Activity Update: All volcanoes in the Cascade Range are at normal levels of background seismicity. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in Washington State; Mount Hood, Mount Jefferson, Three Sisters, Newberry Volcano, and Crater Lake, in Oregon; and Medicine Lake volcano, Mount Shasta, and Lassen Peak in northern California. Mount St. Helens has been at Volcano Alert Level NORMAL (Aviation Color Code GREEN) since July 10, 2008, a change assigned 5-6 months after the late January cessation of its 2004-2008 eruption.

Volcano seismicity at Mount St. Helens and elsewhere along the Cascades has remained relatively quiet over the past week. November 13 at 17:48 PST a M5.2 earthquake originated offshore of Oregon and was recorded at seismographs along the Cascades. Inclement and tempestuous weather for much of the week and snow at higher elevations has led to a quiet week for fieldwork in the Cascades.

Cascade Range Volcanoes
Volcano Alert Level: NORMAL
Aviation Color Code: GREEN

Activity Update: All volcanoes in the Cascade Range are at normal levels of background seismicity. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in Washington State; Mount Hood, Mount Jefferson, Three Sisters, Newberry Volcano, and Crater Lake, in Oregon; and Medicine Lake volcano, Mount Shasta, and Lassen Peak in northern California. Mount St. Helens has been at Volcano Alert Level NORMAL (Aviation Color Code GREEN) since July 10, 2008, a change assigned 5-6 months after the late January cessation of its 2004-2008 eruption.

Volcano seismicity in the Cascades has remained quiet over the past week. Given the onset of wet weather, and snow at higher elevations, this has also been a quiet week for field work in the Cascades.