BUILDING RISK KNOWLEDGE
WHY THE FOUNDATION WAS BORN? >
WHY THE FOUNDATION WAS BORN? >
DISASTERS ARE NOT NATURAL, they are socially built, due to lack of preparation, prevention, mitigation work, education and monitoring. They are natural risks or hazards that impact vulnerable societies. Knowledge help reducing social and structural vulnerability in order to have more resilient societies!
Volcanoes erupt in different ways, pose multiple types of hazards, and the initiation and duration of eruptions are relatively uncertain. Therefore, authorities and populations at risk must be knowledgeable about regional volcano hazards so that they can be both prepared and flexible in their response. Location-specific volcano hazards information can be found on a volcano-by-volcano basis.
Use this map to select the volcano or volcanoes nearest you to read about the hazards present.
The USGS has published several volcano-specific hazard maps, which illustrate the potential for ground-based volcanic impacts—lava flows, hot rocks, volcanic gases, and more far-reaching hazards such as ashfall and lahars that flow in valleys that drain the volcano.
In the event of an eruption, scientists will evaluate current events and develop “scenario” based hazards maps that depict possible scenarios for the progress of the volcanic activity.
Typical volcano hazard zones during an eruption are:
Lava-flow hazard zones map, Island of Hawai‘i. See Full Map for complete legend.
Depending on the type of volcano, downslope communities may need to prepare for lava flows or lahars. Lava flows that impact people occur from basaltic volcanoes, like those in Hawaii. Lahars impact river valleys and typically occur from snow- and ice-clad volcanoes like those in the Cascade Range.
Downwind communities may need to prepare for tephra and ashfall. When ash-producing eruptions are imminent or in process, the USGS and its partners will analyze wind conditions and develop maps that indicate areas most likely to receive ashfall.
Volcano Evacuation Route sign along a roadway in Washington State.
VOLCANO ACTIVE FOUNDATION RESPONSABILITY
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