Mount St. Helens Volcano - Current Update
CASCADES VOLCANO OBSERVATORY
Friday, March 27, 2015 8:00 AM PDT (Friday, March 27, 2015 15:00 UTC)
CASCADE RANGE VOLCANOES
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN
Activity Update: All volcanoes in the Cascade Range of Oregon and Washington are at normal background levels of seismicity. These include Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams in Washington State; and Mount Hood, Mount Jefferson, Three Sisters, Newberry, and Crater Lake in Oregon. Additionally, GPS data from most of the major volcanoes, and sparse real-time hydrologic and geochemical monitoring, show no anomalous activity.
Recent Observations: Mount Rainier experienced a short-lived earthquake swarm March 23–24, with most events occurring during a ~30-minute burst on March 23. The Pacific Northwest Seismic Network located twenty of these events, centered mainly beneath the upper south flank at 2–3 km depth. Magnitude of the located events ranged from 1.6 down to negative 0.7. Such swarms occur sporadically at Mount Rainier, but this week’s was the most substantial, by number of earthquakes, since a ~1000-event episode September 20–22, 2009. An analysis published in 2013 suggests that earthquakes of the 2009 swarm were initiated by hydrothermal fluid movement along cracks or small faults, as is likely the case for the March 23–24 swarm.
Source: Current Alerts for U.S. Volcanoes
Mount St. Helens VolcanoCam
This is a static image of Mount St. Helens, taken from the Johnston Ridge Observatory.
The Observatory and VolcanoCam are located at an elevation of approximately 4,500 feet,
about five miles from the volcano.
You are looking approximately south-southeast across the North Fork Toutle River Valley.
The VolcanoCam image automatically updates approximately every five minutes.
Information courtesy of ...
U.S. Geological Survey, Vancouver, Washington
University of Washington, Pacific Northwest Seismograph Network, Seattle, Washington
USGS Cascades Volcano Observatory
Cascade Range Current Update
Current Alerts for U.S. Volcanoes
Volcano Observatories: Alaska
Volcano Observatories: Cascades
Volcano Observatories: Hawaii
Volcano Observatories: Long Valley
Volcano Observatories: Mariana Islands
Volcano Observatories: Yellowstone