What are the main hazards from volcanoes?

Several hazards may affect the area around the volcano, such as lava flows, pyroclastic flows, lahars, jökulhlaups and landslides or debris avalanches. Volcanic activity also produces hazards that can affect areas far from the volcano, such as tephra or ash falls, releases of gas and tsunamis.

Where are the most hazardous volcanoes in California?

Mount Shasta
The three California spots that made the top 18 – the section that contains “very high threat” volcanoes – were Mount Shasta, Lassen volcanic center, and Long Valley Caldera. Mount Shasta was ranked as the most dangerous of all California volcanoes, ranking as fifth overall.

What are 3 volcanic hazards?

List of Volcanic Hazards

• Pyroclastic Density Currents (pyroclastic flows and surges)
• Lahars.
• Structural Collapse: Debris flow-Avalanches.
• Dome Collapse and the formation of pyroclastic flows and surges.
• Lava flows.
• Tephra fall and ballistic projectiles.
• Volcanic gas.
• Tsunamis.

What are the 6 volcanic hazards?

What are the hazards from volcanoes?

• Lava. Lava (molten rock) can erupt as fire fountains or lava flows (when it is runny) or as steep-sided domes (when it is viscous).
• Pyroclastic flows.
• Phreatic explosions.
• Lahars.
• Jökulhlaups.
• Landslides.
• Volcanic earthquakes.
• Tsunamis.

What are the risks of living near a volcano?

Those living farther away are likely to avoid complete destruction, but their cities and towns, crops, industrial plants, transportation systems, and electrical grids can still be damaged by tephra, ash, lahars, and flooding.

What volcano erupted in California?

On May 22, 1915, an explosive eruption at Lassen Peak, California, the southernmost active volcano in the Cascade Range, devastated nearby areas and rained volcanic ash as far away as 300 km (about 200 mi) to the east.

What volcano is in California?

At least seven California volcanoes—Medicine Lake Volcano, Mount Shasta, Lassen Volcanic Center, Clear Lake Volcanic Field, Long Valley Volcanic Region, Coso Volcanic Field, and Salton Buttes – have partially molten rock (magma) deep within their roots, and research on past eruptions indicates they will erupt again in …

Can you name five 5 geologic hazards posed by an erupting volcano?

Volcanic Eruptions – Lava Flows, Ash Fall, Lahars. Landslides – Rock Falls or Slides, Debris Flows, Mud Flows. Floods – Inundation, Erosion. Snow Avalanches.

What is the most devastating volcanic eruption hazard?

Historically, lahars have been one of the deadliest volcano hazards. They can occur both during an eruption and when a volcano is quiet.

Why are volcanoes natural hazards?

Volcanic gases that pose the greatest potential hazards are sulfur dioxide, carbon dioxide, and hydrogen fluoride. Locally, sulfur dioxide gas can lead to acid rain and air pollution downwind from a volcano. These gases can come from lava flows as well as a volcano that erupts violently.

What active volcanoes are in California?

Active and Potentially Active Volcanoes in California

• Medicine Lake.
• Mount Shasta.
• Lassen Peak.
• Clear Lake.
• Long Valley (including Inyo, Mono, Mammoth)
• Coso Peak.

What portions of California’s infrastructure passes through volcanic hazard areas?

“Overhead electric transmission lines of three of California’s major utilities pass through volcanic hazard zones, as well as about 178 associated substations,” says the report. The impact would be not only on humans, but crops, livestock and animals, as well.