This essay examines the geology of an earthquake and the physical and psychological effects the Northridge, California, earthquake had on that area. (MDH)

Hot spots are isolated areas of geologic activity where volcanic eruptions, earthquakes, and upwelling currents occur far from plate boundaries. These mantle plumes are relatively stable and crustal plates drift over them. The nature and location of hot spots (with particular attention to the Hawaiian Islands and Iceland) are discussed. (DH)

Explores introductory geology students' (n=186) understanding of earthquakes. Results indicate that the mass media seem to provide students greater details about the cause and impact than the actual experience itself, students lack a broad understanding about the theory of plate tectonics, and introductory geology students have extensive…

Discusses the way in which physics can be used to determine the structure of the Earth and observe the processes indicative of the structures dynamic nature. (MDH)

Describes how seismic tomography is used to analyze the waves produced by earthquakes. The information obtained from the procedure can then be used to map the earth's mantle in three dimensions. The resulting maps are then studied to determine such information as the convective flow that propels the crustal plates. (JN)

Contains the second of three columns reviewing films on earthquakes. The films are about earthquakes in general, though California earthquakes play a dominant role in many of these films, which are rated on a scale of one to five stars. The list includes the year made, length of time in minutes, distribution source, and price. One of the top-rated…

Described are concepts involved with the formation and actions of the Mid-Ocean Ridge. Sea-floor spreading, the magma supply model, discontinuities, off-axis structures, overlaps and deviation, and aquatic life are discussed. (CW)

Presents fault activity with an emphasis on earthquakes and changes in continent shapes. Identifies three types of fault movement: normal, reverse, and strike faults. Discusses the seismic gap theory, plate tectonics, and the principle of superposition. Vignettes portray fault movement, and the locations of the San Andreas fault and epicenters of…

Reviews various topics and research studies on the geology of volcanoes. Areas examined include volcanoes and weather, plate margins, origins of magma, magma evolution, United States Geological Survey (USGS) volcano hazards program, USGS volcano observatories, volcanic gases, potassium-argon dating activities, and volcano monitoring strategies.…

Points out that large earthquakes can take place not only on faults that cut the earth's surface but also on blind faults under folded terrain. Describes four examples of fold earthquakes. Discusses the fold earthquakes using several diagrams and pictures. (YP)

Presents an outline of two sets of curricular materials that address the internal rock cycle and the internal energy of the earth in relation to plate tectonic theory. (Contains 31 references.) (DDR)

Uses earthquakes to teach about the importance of collecting enough data and simplifying and visualizing them appropriately. Leads students relatively easily into a sophisticated yet enjoyable examination of large databases and creating hypotheses to explain the patterns that they unearth. (Author/NB)

Describes and attempts to explain the sporadic devastating effects of the Northridge (California) Earthquake of January 17, 1994, as being the result of constructive interference from P and S earthquake waves. (MVL)

This activity is designed to teach how tectonic plates move, what some consequences of this motion are, and how magnetic anomalies document the motion at spreading centers do. The activity provides learning objectives, a list of needed materials, key vocabulary words, background information, day-to-day procedures, internet connections, career…

Outlines the vulnerability of the West Indies to various natural hazards, especially hurricanes, earthquakes, and volcanic eruptions. Reviews the geologic and meteorologic causes and consequences of the hazards. Suggests methods of incorporating hazards information in geography classes. Includes maps and a hurricane tracking chart. (DK)