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Overlay represents area within CVO's jurisdiction.
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Cascade Range Weekly Update
Friday, January 12, 2018 1:50 PM US/Pacific
Current Volcano Alert Level: NORMAL
Current Aviation Color Code: GREEN
 
Cascades Volcano Observatory's mission
The U.S. Geological Survey's Cascades Volcano Observatory strives to serve the national interest by helping people to live knowledgeably and safely with volcanoes in WA, OR, and ID.

HOT STUFF   (archive)
Young Volcanoes in WA, OR & ID1

Geologic maps lay the foundation for this virtual tour of western states volcanoes.
January 09, 2018

What do the Three Sisters, Crater Lake, Medicine Lake, Lassen Peak, Mammoth Mountain and Yellowstone have in common?

Each of these volcanoes has been studied extensively in order to produce comprehensive geologic maps. The results of these studies are more than just maps—each is a synthesis showing a volcanic field's eruptive history and the volcano's behavior over its lifetime. These studies form the foundation for future assessments of volcanic or geologic activity and geohazards.

Take a virtual geologic tour in the USGS Geonarrative, Volcanic Landscapes.


Applications accepted for the 2018 GeoGirls field camp at Mount St. Helens.
January 04, 2018

The application process is open for the July 29–August 2, 2018, GeoGirls field camp at Mount St. Helens. The free, week-long science camp targets girls graduating the 7th and 8th grades. GeoGirls, high school mentors, and teacher mentors will spend five days conducting hands-on research and interacting with scientists, learning about volcanoes, natural hazards and modern scientific monitoring technologies. They will camp, hike to field sites, work on research projects and learn how to document and share their scientific findings by building a public webpage.

Applications from middle school girls, high school girls and teacher mentors will be accepted January 3–March 1, with selections announced April 23, 2018. The program will include:

  • 25 girls graduating from 7th and 8th grades from Washington and Oregon;
  • 5 girls graduating from 10th-12th grades from Washington and Oregon;
  • 4 female middle school science teachers from Washington and Oregon.

The goal of the program is for GeoGirls participants to emerge with a stronger understanding and connection to Earth systems and feel confident in choosing careers in science, technology, engineering, math or other STEM-related fields. Find all the information you need on the Mount St. Helens Institute webpage. Applications are also accepted for Adult volunteers.


Tectonic earthquake detected near Mount St. Helens.
January 03, 2018

A Magnitude 3.9 earthquake occurred at 12:36 a.m. on January 3, 2018, about 12 km (7.5 mi) NE of Mount St. Helens at a depth of 10 km (6 mi). The earthquake is a tectonic earthquake aligned with regional stress and faulting in the area. There is no sign that this is connected to volcanic activity.

The M 3.9 was followed by a fairly vigorous earthquake aftershock sequence, with at least 15 events located by the Pacific Northwest Seismic Network. Aftershocks tailed off significantly within several hours.

Follow the link to view Mount St. Helens monitoring data online.


CVO welcomes the public to an Open House on May 12, 2018.
December 14, 2017

The USGS-Cascades Volcano Observatory opens its doors to the public on Saturday, May 12, for a one-day open house. Scientists will be on-hand from 10:00 am to 5:00 pm to share the results of their research and talk about volcano hazards. Hands-on activities and equipment demonstrations will be featured.


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