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Volcano Hazards Program

Volcano Hazards Program

Volcano Live, John Seach LISS - Live Internet Seismic Server These data update automatically every 30 minutes. Last update: April 13, 2014 07:09:31 UTC Seismograms may take several moments to load. Click on a plot to see larger image. CU/ANWB Willy Bob, Antigua and Barbuda CU/BBGH Gun Hill, Barbados CU/BCIP Isla Barro Colorado, Panama CU/GRGR Grenville, Grenada CU/GRTK Grand Turk, Turks and Caicos Islands CU/GTBY Guantanamo Bay, Cuba CU/MTDJ Mount Denham, Jamaica CU/SDDR Presa de Sabenta, Dominican Republic CU/TGUH Tegucigalpa, Honduras GT/BOSA Boshof, South Africa GT/CPUP Villa Florida, Paraguay GT/DBIC Dimbokro, Cote dIvoire GT/LBTB Lobatse, Botswana, Africa GT/LPAZ La Paz , Bolivia GT/PLCA Paso Flores, Argentina GT/VNDA Wright Valley (Bull Pass) Antarctica IC/BJT Baijiatuan, Beijing, China IC/ENH Enshi, Hubei Province, China IC/HIA Hailar, Neimenggu Autonomous Region, China IC/KMI Kunming, Yunnan Province, China IC/LSA Tibet, China IC/MDJ Mudanjiang, Heilongjiang Province, China IC/QIZ Qiongzhong, Hainan Province, China IC/SSE Shanghai, China IC/XAN Xian, China

Terrestrial Volcanoes Terrestrial Volcanoes By turns hot embers from her entrails fly, And flakes of mountain flame that arch the sky.-Virgil's Aeneid Volcanoes destroy and volcanoes create. Ironically, these volcanic soils and inviting terranes have attracted, and continue to attract, people to live on the flanks of volcanoes. On August 24, A.D. 79, Vesuvius Volcano suddenly exploded and destroyed the Roman cities of Pompeii and Herculaneum. In the United States on March 27, 1980, Mount St. The word volcano comes from the little island of Vulcano in the Mediterranean Sea off Sicily. The following video clips are take from "Understanding Volcanic Hazards", © 1995, International Association of Volcanology and Chemistry of Earth's Interior (IAVCEI). Views of Terrestrial Volcanoes Llullaillaco Volcano The summit of South America's Llullaillaco Volcano has an elevation of 22,110 feet above sea level, making it the highest historically active volcano in the world. Carr M.

National Geographic: Eye in the Sky--Volcanoes Volcanoes are awesome manifestations of the fiery power contained deep within the Earth. These formations are essentially vents on the Earth's surface where molten rock, debris, and gases from the planet's interior are emitted. When thick magma and large amounts of gas build up under the surface, eruptions can be explosive, expelling lava, rocks and ash into the air. Less gas and more viscous magma usually mean a less dramatic eruption, often causing streams of lava to ooze from the vent. The mountain-like mounds that we associate with volcanoes are what remain after the material spewed during eruptions has collected and hardened around the vent. A large eruption can be extremely dangerous for people living near a volcano. Volcanoes tend to exist along the edges between tectonic plates, massive rock slabs that make up Earth's surface. About 1,900 volcanoes on Earth are considered active, meaning they show some level of activity and are likely to explode again.

SAVAGE EARTH Online Please note: SAVAGE EARTH ONLINE looks best when viewed using Netscape 3.0 or above, or Internet Explorer 3.0 or above, on Macintosh, Windows 95 or Windows 3.1. If you have an earlier version, or another browser, all pages may not be presented exactly as designed. To view the animations in SAVAGE EARTH ONLINE, you will need the free Flash plug-in. Premiere: July 19, 1998, at 8 pm (ET) on PBS. (Watch for repeat showings on your local PBS station.) From the legendary fury of Mt. About the Series Program descriptions, TV schedule, videotape ordering information, and clips from the series. Hell's Crust: Our Everchanging PlanetArticle: The Earth at WorkSidebar: Probing the DepthsSidebar: "Black Smokers"Sidebar: The Ring of Fire The Restless Planet: EarthquakesArticle: Earth -- All Stressed OutSidebar: Learning from EarthquakesSidebar: Quake PredictionSidebar: Build Smart, Not Hard Waves of Destruction: TsunamisArticle: Surf's Up! Animations Menu Main Animations:The Hot ZonesEarthquake!

Mount St Helens Feature Pictured is the ash-and-gas plume produced during the plinian phase of the climactic eruption of Mount St. Helens that began shortly after 8:32 a.m. Pacific Daylight Time on May 18, 1980. Photograph taken by Robert M. Twenty years ago in late March, southwestern Washington’s Mount St. This eruption caused the worst volcanic disaster in the recorded history of the United States, resulting in 57 deaths, scores of injuries and economic loss exceeding $1 billion. Modern volcanologic studies began early in the 20th century, in large part reflecting the scientific and societal need to better understand “how volcanoes work” in the wake of three 1902 eruptions that claimed more than 36,000 lives: Mont Pelée, Martinique; Soufrière, St. The reawakening of Mount St. The 1980 and subsequent eruptions of Mount St. Analysis of a precisely timed series of photographs, coupled with eyewitness accounts, indicated that the north flank of Mount St. Anticipating the eruption Ruiz and Pinatubo

Mount St. Helens - May 18, 1980 Seismogram from station CPW, 112 km (70 mi) northwest of Mount St. Helens, May 18, 1980 Summary of Events Magma began intruding into the Mount St. Helens edifice in the late winter and early spring of 1980. Precursory Activity On March 16, 1980, the first sign of activity at Mount St. Steam-blast (phreatic) eruption from the summit crater of Mount St. Within a week the crater had grown to about 400 m (1,300 ft) in diameter and two giant crack systems crossed the entire summit area. Bulge on the north side of Mount St. Bulge (right) and small crater, Mount St. Debris Avalanche Debris avalanche deposit from the May 18, 1980 eruption of Mount St. With no immediate precursors, a magnitude 5.1 earthquake occurred at 8:32 a.m. on May 18, 1980 and was accompanied by a rapid series of events. Lateral Blast The landslide removed Mount St. Blowdown of trees from the May 18, 1980 eruption of Mount St. Plinian eruption column from May 18, 1980 Mount St. Plinian Eruption Ash cloud from Mount St. Lahars

Mount St. Helens National Volcanic Monument Fireweed, growing in Mount St. Helens' devastated area; view from the north. Summer 1984. The Mount St. Helens National Volcanic Monument is within the Gifford Pinchot National Forest and managed by the USDA Forest Service. The Monument offers many seasonal activities such as hiking, camping, fishing, snow sport, and ranger led educational programs. David Johnston at Coldwater II, 1900 hours, May 17, 1980. Plume from Johnston Ridge Observatory, Mount St. Johnston Ridge Observatory The Johnston Ridge Observatory is open seasonally and is located on Johnston Ridge in the center of the 1980 blast zone approximately 8 km (5 mi) north of the Mount St. Ape Cave Lava Tube Ape Cave is one of numerous lava tubes formed in the Cave Basalt about 1,895 years ago.

Cascades Volcano Observatory (CVO) Researchers use geophysics to locate aquifers at Mount St. Helens.July 06, 2016 Every year, Mount St. Using a geophysical method called Controlled-Source Audio-Magnetotellurics, researchers located two aquifers at Mount St. Knowing more about groundwater at Mount St. Read more at Where is the Hot Rock, and Where is the Groundwater—Using CSAMT to Map Beneath and Around Mount St. Recent Mount Hood earthquake swarm typical for this Oregon volcano.May 16, 2016 At Mount Hood, a swarm of small earthquakes was detected May 15-16, 2016. The earthquakes in this swarm are located 2-3 miles south of the summit of Mount Hood at depths of 2-3 miles below sea level. Swarms are not uncommon in the Mount Hood area, which typically experiences one or two swarms per year that last for several days to weeks. For more information, see Mount Hood Monitoring and the Cascade Volcano Observatory Weekly Update. Small magnitude earthquake swarm continues at Mount St.

Volcano's Deadly Warning | Anatomy of a Volcano | PB By Lexi Krock Posted 11.12.02 NOVA What's the difference between lava and magma? What are volcanic vents, dikes, and fissures? To learn more about the various numbered parts of this volcano diagram, read on. There are many different kinds of volcanoes, ranging from the Hawaiian type, which produces gentle, effusive eruptions that tourists can observe from mere steps away, to the andesitic variety, which can produce violent, life-threatening eruptions with little warning. Many volcanoes famous for their destructive power, including Mt. Mt. 1. Volcanic ash consists of rock, mineral, and volcanic glass fragments smaller than a tenth of an inch in diameter—or slightly larger than a pinhead. Volcanic ash is created during explosive eruptions by the shattering of solid rocks and the violent separation of magma into tiny pieces. Ash from the 1993 eruption of Unzen volcano in Kyushu, Japan rises halfway up the walls of a house. 2. lava flow 3. lava dome 4. lava A fast-moving lava flow from Mt. 9.

The 3 basic rock types Ask GeoMan... What are the 3 basic types of rocks? Just as any person can be put into one of two main categories of human being, all rocks can be put into one of three fundamentally different types of rocks. They are as follows: Igneous Rocks Igneous rocks are crystalline solids which form directly from the cooling of magma. Sedimentary Rocks In most places on the surface, the igneous rocks which make up the majority of the crust are covered by a thin veneer of loose sediment, and the rock which is made as layers of this debris get compacted and cemented together. Clastic: your basic sedimentary rock. Click here for more on sedimentary processes and rocks (RCC). Metamorphic Rocks The metamorphics get their name from "meta" (change) and "morph" (form). Click here to ask GeoMan a question Return to Ask GeoMan's Index of Questions Return to GeoMan's Home Page You are GeoManiac number since April 1, 1997