MOUNT BAKER AND GLACIER PEAK | ACTIVE VOLCANOES ERUPTION CLOUD While an eruption or lahar HOT ROCKS might not happen in our lifetime, ASH FALL being prepared is our PYROCLASTIC LANDSLIDE FLOW LAVA FLOW best defense. Are You Ready for An Eruption? LAHAR (VOLCANIC MUDFLOW) ICE-COVERED VOLCANOES North ARE HAZARDOUS DURING ERUPTIONS Mount Baker dominates the skyline of northwestern Washington and southwestern British Columbia. Glacier Peak is mostly hidden from view. Both volcanoes have erupted in PUGET SOUND MOUNT BAKER GLACIER PEAK recent centuries and will erupt again, disrupting the landscape HAZARD ZONES The most recent eruption occurred A massive eruption 13,000 years ago and the lives of people downstream and LOWER HIGHER in 1843. A reheating in 1975 reminded was ten-times larger than the 1980 RISK RISK local people of the volcano’s potential to eruption of Mount St. Helens. Ash from downwind. erupt again. On cold clear days that follow this eruption has been found in peat Lahars (volcanic mudflows) damp weather, condensation of water bogs of Ireland. travel down valleys from vapor causes a steam plume. the volcano and can reach Go! closest populated areas within one hour. Set, WHEN A LAHAR Ready, STAY INFORMED: WARNING IS Flanks of volcano are LISTEN TO OFFICIAL ISSUED, MOVE OFF subject to all hazards. LIVE SAFELY SOURCES VALLEY FLOORS 0 10 Miles Get to know THAT COULD BE the eruption hazards: AT RISK 0 10 Km Lahars (volcanic mudflows), caused by melting of snow • Look at the map. Assess • Emergency Alerts/ and ice, can flow for tens of miles down valleys. the hazards where you live, Broadcasts. work, and commute. • All Hazards • Evacuate by vehicle Ash fall, even during small eruptions, can disrupt air and • Make a plan. Identify NOAA Weather Radio. or on foot to high ground ground transportation and dust our forests, farms, and towns 50 feet or more above evacuation routes and shelter • U.S. Geological Survey valley floors. with gritty rock fragments. above valley floors. (USGS) Volcano MOUNT BAKER PHOTO BY DAVE TUCKER; GLACIER PEAK PHOTO BY JOHN SCURLOCK DURING AN ERUPTION, EXPECT: • Assemble emergency Notification Service. • If you are safe supplies and a plan from lahars and Mount Baker u Lahars and some ash fall. ash is falling, to reunite. q For lahars, quickly go Glacier Peak u Lahars and the possibility of substantial ash fall. seek shelter in • Share your plans with to high ground above a building or USGS monitoring networks can provide warning. Future eruptions family, neighbors, and the valley floor. vehicle. will be preceded by days or more of increased earthquakes and, friends. possibly, by measurable swelling of the volcano and increased emission of volcanic gases. Get More Information There are 5 active volcanoes in Washington State. Be prepared. Get more information and learn about volcano hazards that might affect your family. snohomishcountywa.gov/2894/Volcano-Preparedness mil.wa.gov WASHINGTON MOUNT BAKER AND GLACIER PEAK MILITARY skagitcounty.net/Volcano volcanoes.usgs.gov DEPARTMENT COMBINED HAZARD MAP. SIMPLIFIED FROM EMERGENCY USGS OPEN-FILE REPORT 95-499 (GLACIER PEAK); MANAGEMENT AND USGS OPEN-FILE REPORT 95-498 whatcomcounty.us/2030/Volcano dnr.wa.gov DIVISION U.S. GEOLOGICAL SURVEY (MOUNT BAKER).