Volcano Hazards Program

Scientists of the USGS volcanic disaster program are active in five US volcanic observatory stations. One of the main objectives of the Observatory is to become an authoritative source of inspiration for our country's volcanoes.

The Hawaiian Volcanic Observatory (HVO) is the oldest of the five with a long history and has written regular articles on volcanic activity and scientific research on Hawaii Volcano. HVO's weekly magazine "Volcano Watch" was published in the 27 th year of November 2017. You can access the entire article directory and search on those websites. Post a new article every Thursday afternoon

Beginning with HVO, the Yellowstone Volcano Observatory (YVO) is the latest of the five observatories, an article published every week on the first day of 2018. This new column - "History of Yellowstone Crater" - will be posted on the homepage every Monday. Like YVO's website HVO's Volcano Watch series, the YVO Chronicles have been reviewed and edited before publication.

Please contact us if you would like to know about specific topics related to Yellowstone and Hawaiian volcanic activities. We absolutely will reply, you may see a long answer in a future volcano watch or an article in the Yellowstone caldera chronicle.

The Alaska Volcano Observatory website (AVO) contains complete information about Alaska Volcano

Cleveland Hills is in the middle of the Aleutian Islands and continues volcanic eruptions since June 17, 2015. Explosive volcanic eruption can send ash to dangerous aviation height

Great Sitkin, located in the middle of the Aleutian Islands, has been erupting volcanoes since July 1, 2018. Explosive volcanic eruption can send ash to a high degree harmful to aviation

The mountain of Veniaminof in the Alaska Peninsula was on the volcanic eruption since 3rd September, 2018. Seismic activity exceeds the background level and low level ash release is observed

Semisopochnoi is located in the western part of the Aleutian Islands and continues volcanic eruptions since September 16, 2018. High seismic activity involves ash emissions that can threaten aircraft

Since 1983, the Kilauea volcano of Hawaii is continuously erupting from Eastern Rift Valley. A small amount of lava remains in the crack of the east lift zone of Kilauea.

Are you interested in which volcano poses a hazard to the United States? The US Geological Survey started a volcanic disaster plan to create volcanic risk maps for the United States and Canada. Investigation of risk map: Is there a volcanic risk near the United States? Please click the non-green volcano icon on the map - where is the volcano? What makes them risk to people in these areas? Do volcanoes change over time? how is it? Use USGS information on one of the dangerous volcanoes to send an e-mail to a fictitious friend near the volcano, asking if you should pay attention, evacuate it or avoid it (dangerous lava or ash) indicate. Outdoor? )

Many volcanoes around the world are subject to disaster research and some of the most notorious volcanoes have been designated as volcanoes for 10 years for intensive hazard studies. Popocatepetl should be registered in the volcano list for 10 years within the amazing range of 30 million people around it, including Mexico City. Volcanic Debris Density Flow is driven by gravity, rock debris and hot gas movement fast, ground-enclosing mixture. This mixture forms a dense fluid moving along the ground and the density drops as the particles fall to the ground. The behavior of the fluid depends on the solids concentration (ie solid gas ratio) versus the amount of hot gas. Dense flow of density is called "volcanic debris flow" and it is practically non-turbulent and confined to valleys. Low density flow is called "volcanic debris" and may spread to hills and valleys like a hurricane.

The environment, volcanoes can compromise all these things through many hazards caused by volcanoes. Volcanic mudflow, floods, landslides, volcanic debris flows, ash clouds and so on. Several factors influence the severity of danger, can cause a difference in danger, can be categorized into various categories such as important, economic, political, society. One physical factor contributing to the difference in volcanic disasters is the steepness of volcanoes. Volcano