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What is a seismic wave? Which of the four types is most destructive? Discover the science behind earthquakes with this animated video.
(Source: DCMP)
Through descriptions of actual volcanic and earthquake occurrences, students will discover how these dynamic forces affect the world. This video discusses the nature and causes of earthquakes and volcanoes. Other topics covered include molten rock, magma, lava, cinder cone, shield volcano, composite volcano, caldera, Ring of Fire, seismic waves, seismograph, and Richter scale.
Photographers and scientists try to explain their fascination with volcanoes and earthquakes. Focuses not on the geological causes, but on how and why these phenomena are photographed and studied. Uses actual footage and closeups for impact. James Earl Jones narrates.
In this segment, William D. Barnhart, assistant professor at The University of Iowa, discusses megathrust earthquakes. Part of the "Ask a Scientist" series.
Understanding what happens at the epicenter of an earthquake, as the tectonic plates beneath the earth shift and the earth shakes, could help better predict when and where the next big one will hit. For the past six years scientists from a number of institutions have joined in a project called San Andreas Fault Observatory at Depth, or SAFOD. They have drilled to the core of the San Andreas Fault, near Parkfield California, down to a specific area along the fault known to experience a number of small earthquakes every year. By retrieving and studying core rock samples from that site, geologists Chris Marone and Brett Carpenter and hydrogeologist Demian Saffer are getting a better understanding of the types of rocks involved in major quakes, versus the rocks present at more forgiving ones.
Structural engineers at the University of California, Los Angeles are hoping to design earthquake-resistance buildings and communities. They are using data and computer modeling to design structures able to withstand major earthquake events. These models are meant to guide safety inspections following earthquakes and help engineers locate “hotspots” more quickly. Part of the “Science Nation” series.
Researchers at the state-of-the-art Structural Engineering and Materials Laboratory at the Georgia Institute of Technology are using a full-scale model building to test new ways to protect structures from earthquakes and potentially save lives. The three-story concrete building is based on designs common through much of the 20th century. It has been subjected to round after round of simulated temblors to test if materials such as carbon fiber or new shape-memory alloys can be used to reinforce the structure so it would remain standing in moderate to strong earthquakes. With support from the National Science Foundation, structural engineer Reginald DesRoches and his team have developed a series of retrofits of varying cost and intrusiveness to give building owners in quake-prone areas a range of choices for hardening their property.
Volcanoes and earthquakes! Geysers and boiling mud! Natural forces like these have been working for millions of years, changing the surface of the earth. Examines the layers of earth, a history of continental drift, plate tectonics, and other phenomena at work on our planet.
Part of a series that features a wide variety of video footage, photographs, diagrams, graphics, and labels. For this particular video, students will focus on earthquakes and the roll tectonic forces play in their occurrences along fault lines. Part of the Science Video Vocab series.
Part of a series that features a wide variety of video footage, photographs, diagrams and colorful, animated graphics and labels. For this particular video, students will receive tips for being prepared in the event that an earthquake occurs. Part of the Science Video Vocab Series.
Part of a series that features a wide variety of video footage, photographs, diagrams and colorful, animated graphics and labels. Begins with a simple definition of the term and concludes with a critical thinking question. For this particular video, students will focus on the term wave. Part of the Science Video Vocab Series.
When she was young, Danielle Sumy rode a roller coaster that simulated an earthquake. Her experience on the roller coaster launched her quest to understand how earthquakes happen. She describes how this encounter and her early love of science motivated her to become a geophysicist. Part of the “EarthScope Chronicles” series.
University of California, Berkeley seismologist Peggy Hellweg discusses the difference between a tremor and an earthquake. She also explains how TremorScope stations record deep tremors along the San Andreas Fault in central California. These stations reveal complex faulting behavior in the deep crust that is surprisingly different from earthquakes in the upper crust.
Plate tectonics describes the large-scale motion of large and small plates of the earth's lithosphere. As the plates slide past one another, they create friction and heat. The tension caused by the friction of heat is released either through earthquakes or volcanoes. Part of the "Earth Science" series.
This program from the acclaimed PBS Nature series, "Forces of the Wild," shows how man risks everything by building on earthquake fault lines, farming the slopes of volcanoes, polluting the air and warming the Earth. Like children playing with matches, we have no idea of the consequences of what we are doing. Narrated by James Earl Jones.
Cornell geophysicist Katie Keranen traveled to Oklahoma to study the increased occurrences of earthquakes. During her research, she discovered the increase in seismic activity is linked to the disposal of wastewater from fracking.
Students will explore how the discoveries of specific fossils, the geographic fit of the continents, ocean floor magnetic fields, young ocean rocks, and seafloor spreading provide evidence to support the theory of plate tectonics. Footage from Iceland helps illustrate the power of tectonic movement. Other topics covered include continental drift, Pangaea, tectonic plates, plate boundaries, mountain building, folding, faulting, and landforms.
The geologic processes of mountain building, seafloor spreading and volcanoes are a few examples of the power of plate tectonics. Footage filmed on-location in Iceland, the Canadian Rockies, and Crater Lake help viewers understand the theory of plate tectonics. Colorful animations illustrate the movement of tectonic plates and the role this plays in the development of geologic features. Other terminology includes: theory of continental drift, mid-ocean ridge, plate boundaries, subduction, convergent boundary, and divergent boundary.
With support from the National Science Foundation (NSF), Forrest Masters and a team at the University of Florida are developing new technologies to help engineers and scientists better understand the strong, high-wind storms that batter communities along U.S. coastlines. The National Home Education Research Institute (NHERI) has the broad goal of supporting research that will improve the resilience and sustainability of civil infrastructure against the natural hazards of earthquakes and windstorms. Part of the "Science Nation" series.
