Where is magma

What are hydrothermal vents, and why do we find them along mid-ocean ridges? Seismology What is a seismic wave? What is the difference between body waves and surface waves, and between P-waves and S-waves? Why can't S-waves travel through liquids? How far can seismic waves reach? Why do P-waves travel faster than S-waves? Why is the interior of the Earth hot? What is the magnetic field of the Earth? Earthquakes and Faults Why do tectonic plates move?

Brief history of the plate tectonics theory Before colliding with Asia, where was India? What is an earthquake? What is the highest magnitude an earthquake can reach? What are the biggest historical earthquakes? Why do earthquakes happen in clusters? Where are earthquakes expected in the world, especially in Asia? What is a supercontinent? Are all the faults on Earth active? How can human activities cause climate change? It ranges in temperature from about o C to o C o F to o F.

Andesitic magma has moderate amounts of these minerals, with a temperature range from about o C to o C o F to o F. Rhyolitic magma is high in potassium and sodium but low in iron, magnesium, and calcium.

It occurs in the temperature range of about o C to o C o F to o F. Both the temperature and mineral content of magma affect how easily it flows.

The viscosity thickness of the magma that erupts from a volcano affects the shape of the volcano. Volcanoes with steep slopes tend to form from very viscous magma, while flatter volcanoes form from magma that flows easily. The audio, illustrations, photos, and videos are credited beneath the media asset, except for promotional images, which generally link to another page that contains the media credit. The Rights Holder for media is the person or group credited. Tyson Brown, National Geographic Society.

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There are a few historic examples of simultaneous eruptions from volcanoes or volcanic vents located within about 10 kilometers 6 miles of each other, but it's difficult to Filter Total Items: 4. Babb, Janet L. View Citation. Babb, J. Year Published: U. Geological Survey Volcano Hazards Program—Assess, forecast, prepare, engage At least volcanoes in 12 States and 2 territories have erupted in the past 12, years and have the potential to erupt again.

Stovall, Wendy K. Stovall, W. Geological Survey Fact Sheet —, 4 p. Year Published: Eruptions of Hawaiian volcanoes - Past, present, and future Viewing an erupting volcano is a memorable experience, one that has inspired fear, superstition, worship, curiosity, and fascination since before the dawn of civilization.

Tilling, Robert I. Year Published: Geologic hazards at volcanoes Most volcano hazards are associated with eruptions. Myers, Bobbie; Driedger, Carolyn L. Filter Total Items: 2. Date published: July 31, Date published: May 11, Filter Total Items: List Grid.

December 31, March 6, Attribution: Natural Hazards. July 22, Attribution: Hawaiian Volcano Observatory. November 15, Attribution: Volcano Hazards Program Office.

June 23, Listen to hear the answer. November 30, November 27, June 15, March 25,