Current Seismicity -- from University of Washington Geophysics Program

How to read the display --- Quake: Real-time Seismogram Displays || Seismometer Calibration Pulse

How the Data Channels are Named - Each data channel has a three part name such as MSL VHZ NC. The first part identifies the station. The middle part describes the data. The last part identifies the seismic network. The station name and network uniquely identify the location where the data are being recorded. The data descriptor tells a) what is being measured (velocity, displacement, acceleration), b) what sort of instrument is doing the recording (digital, hi-gain analog, etc.), and c) the orientation of the sensor (vertical, horizontal-north-south or horizontal-east-west.) For example, VHZ is a high-gain (sensitive) analog velocity sensor, sensing vertical movement.

• What To Do If a Volcano Erupts: American Red Cross Safety Information - Volcanoes - Information courtesy American Red Cross;
• What To Do If a Volcano Erupts: Federal Emergency Management Agency (FEMA) - Information courtesy Federal Emergency Management Agency (FEMA)
• What To Do If a Volcano Erupts: Volcanic Ashfall - How to be Prepared for an Ashfall - Information courtesy USGS/CVO, and Washington Military Department, Emergency Management Division
• What To Do If a Volcano Erupts: Volcanic Ash and Mudflows - Information via USGS/Earthquake Information Bulletin
• What To Do During Floods: Rivers Draining Volcanoes Can Flood - Information courtesy City of Longview, Washington and Washington Military Department, Emergency Management Division

Cascade Range Volcanoes

Washington is home to five major composite volcanoes or stratovolcanoes (from north to south): Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, and Mount Adams. These volcanoes and Mount Hood to the south in Oregon are part of the Cascade Range, a volcanic arc that stretches from southwestern British Columbia to northern California. All Washington volcanoes except Mount Adams have erupted within the last 250 years. However, the volcanoes do not erupt at regular intervals, thus making it difficult to forecast when a given volcano might come to life again. Although worldwide the risks from volcanoes are significantly lower than risks from earthquakes and landslides, the relatively long recurrence interval for volcanic hazards (decades to several centuries) combined with their great potential for destruction make them particularly insidious. (See Mount Adams, Mount Baker, Glacier Peak, Mount Rainier, and Mount St. Helens below)

Volcanic Hazards Map - (based on activity in the last 15,000 years) Washington State Volcanoes:14

Visit A Volcano - Cascade Range Volcanoes - Use the Interactive Imagemap to take a virtual tour of a volcano in the Cascade Range. Mount St. Helens National Volcanic Monument

Volcanoes and History: Cascade Range Volcano Names - Where did Washington's volcanoes get their names? || Volcanoes and History: Historical Maps and Journals: " A Cascade Range Timeline" - more information about naming the volcanoes and other historical information

America's Volcanic Past: Washington State - Many resources about Washington's volcanoes including: Potentially Active Volcanoes of the Western USA; Washington State: A Brief Geologic History

U.S. Geological Survey Fact Sheets (printed PDF version): What Are Volcano Hazards? || Volcanic Ash Fall-A "Hard Rain" of Abrasive Particles || Living With Volcanic Risk in the Cascades || Mount St. Helens – From the 1980 Eruption to 2000 || Mount Baker--Living With An Active Volcano || Glacier Peak--History and Hazards of a Cascade Volcano || Mount Rainier -- Learning to Live with Volcanic Risk

 

Washington DGER: Volcanoes - Overview of Cascade Range Volcanoes with separate site for each of Washington's volcanoes

 

Mount St. Helens

NOAA Images - The Eruption of Mount Saint Helens - Slideshow of the 1980 eruption

Photo Glossary of Volcano Terms - A picture speaks a thousand words. Learn volcano terms with images and photos.

Eruptions of Mount St. Helens: Past, Present, and Future - Web-book written in 1984. Includes photos and information from USGS

Annenberg/CPB Exhibits Volcanoes -- Can We Predict Volcanic Eruptions - Interactive lesson

Vocabulary - What does it mean??? --- Volcanic Terms - from Volcano World || Photo Glossary of Volcanic Terms - from USGS || Glossary - from USGS Learning Web

Predicting Volcanic Eruptions - Outstanding interactive lessons on how volcanic eruptions are predicted.

 

Volcano Monitoring Overview - Be sure to read: Taking A Volcano's Pulse - explains 5 main tools used to predict: Seismicity, Ground Movements, Geophysical Properties, Gas Geochemistry, and Hydrologic Regime. For additional information: Volcano and Hydrologic Monitoring

 

Parts of a Volcano - Cross-section shows the parts of a volcano.

 

Lava Flows and Pyroclasts - Volcanic Cones and Eruptions -

Volcanic Eruption Scale - How BIG are Volcanic Eruptions? Every year about 60 volcanoes erupt, but most of the activity is pretty weak. How do volcanologists measure how big an eruption is?

 

General Volcanology Information

Smithsonian Institution - Global Volcanism Program -

 

US Geological Survey general volcano pages -

 

Volcanosurfing pages by Hugues Dufumier -

 

Volcanoes -

 

Dante's Peak FAQs - General questions about volcanoes and volcanologists, movie fact or fiction?, questions about eruption precursors, volcano monitoring, and volcano hazards