You can use this page to browse through all of the individual visualizations that have been cataloged in our digital library. You can also browse them as
Listening to the 2004 Indian Ocean tsunami quake
This resource is an abstract. This study tracks the movement of the rupture that caused the December 26, 2004 Indian Ocean tsunami by comparing recordings of sound waves from five sensors located around the Indian Ocean. The data were used to triangulate the location of sound wave source. Results indicated that the rupture first moved northwest at 2.4 kilometers per second along the Sunda trench then slowed to 1.5 kilometers per second around 600 kilometers from the earthquake's epicenter. The author indicates that the slower speed of the rupture was unusual for an earthquake caused by a rupture close to the surface.
Tsunami "shadows" may allow remote detection of tidal waves
This resource provides an abstract. This study investigates tsunami shadows, extended dark strips on the ocean surface before a tsunami. Such shadows are found to result from an air-sea interaction induced by tsunami-related atmospheric disturbances. Results suggest that remote surface water observations can be used to detect deep ocean tsunamis via their shadows and thus provide significantly more reliable and earlier warning before the large waves strike vulnerable shores.
How volcanic eruptions cause tsunamis
This study investigates the effect of pyroclastic flows on tsunami generation. The authors analyzed several possible mechanisms that occur when the particle rich flows encounter water and conclude that the volume and density of the basal flow has a close correlation with the wave's amplitude and wavelength, which can be used to model the water movement in lakes, bays and oceans.
Magma shakes up earthquake locations
Numerical models were employed to examine the relationships between the orientation of volcanotectonic faults and magma movement. It was found that the direction of movement on strike-slip faults should be opposite to that predicted on the basis of regional stresses. The results do not explain the location of some volcanotectonic earthquakes and that the locations of preexisting faults may be more important in influencing the location of these earthquakes.
Using GPS for earthquake imaging
This resource provides an abstract. The authors used a dense array of Global Positioning System (GPS) stations to model how the Earth slipped during the 2003 8.0-magnitude Tokachi-Oki earthquake near Japan. Results indicate that displacements of more than one meter occurred in approximately 20 seconds on Hokkaido. It was found that while satellite data are less precise than traditional seismic data, GPS has the advantage in measuring displacement since seismometers cannot distinguish between the ground's acceleration and rotation.
Simplified modeling method to estimate lava flow
This resource provides an abstract. A numerical model that produces early predictions for the projected path of a lava flow was created. The two dimensional model is based on a generalized set of equations to describe lava flow propagation. Using real data from the 1991 1993 Mount Etna eruption in Italy, the model effectively reproduced the actual lava flow. This preliminary result indicates the usefulness of this method for forecasting lava flow paths for risk mitigation and predicting the damage from future eruptions.
Background on the 1900 Galveston Hurricane
A report on the 1900 hurricane that devastated Galveston, Texas is available on the AGU Web site. It is a chapter from the book, Hurricane!: Coping with Disaster (AGU, 2003), covering the event itself and lessons learned from it.
Discover Our Earth
Discover Our Earth contains a wide range of information related to Earth science using graphs, maps, and movies. The focal topics are earthquakes, volcanoes, topography, plate tectonics, and sea level change. There are three main areas to access the data: Educators, Students, and Web Tools. The Educators section is designed to provide teachers with basic background information about selected Earth science topics and suggest several student activities and exercises that can be employed in classroom settings. Educators are encouraged to adopt, adapt, and modify exercises to suit their needs or situation. The Students section provides critical background information and primarily prepares students to start using the web tool QUEST (Quick Use Earth Science Study Tool). Using QUEST, students are able to experiment and test their own ideas and hypotheses related to any topics provided in these pages. With the tools and information provided, students are able to actively engage in an earth science knowledge discovery, critically evaluate the data and results, and reach their own conclusions about the earth system processes. Two Java-based, interactive data analyses and mapping tools allow customized access to a large variety of earth science data sets that are used by research scientists. The first Java applet, QUEST, has been designed and developed to be used by beginning and intermediate level earth science students. It has an easy-to-use interface that allows access to key earth science data sets. The second Java applet, GEOID (Geoscience Interactive Data tool), is more appropriate for advanced users, and provides a dynamic mapping interface and can be used to access all of the underlying earth science data sets.
Climate Monitoring and Diagnostic Laboratory: Carbon Cycle Greenhouse Gases
The National Oceanic and Atmospheric Administration Climate Monitoring and Diagnostic Laboratory Carbon Cycle Greenhouse Gases group makes ongoing discrete measurements from land and sea surface sites and aircraft, and continuous measurements from baseline observatories and tall towers. These measurements document the spatial and temporal distributions of carbon-cycle gases and provide essential constraints to our understanding of the global carbon cycle. This website is an interactive atmospheric data visualization tool. This tool enables users to view data, obtain details about sampling locations, manipulate and compare data sets and create custom graphs. Data includes information on a variety of gases, and can be viewed as seasonal patterns, time series, or latitudinal distribution.
Sediment Transport Movies
This site features a collection of 25 freely downloadable brief movies that demonstrate different types of sediment transfer processes in a variety of environments. Videos present both live and laboratory-created conditions and events such as turbidity currents, debris flows, tidal fluctuations, and the formation of dunes and ripples. For example, two live videos by Canadian sedimentologist Gerard Middleton show the effects of tidal processes at the Bay of Fundy, Nova Scotia. There are also four videos which capture the growth of mineral crystals. Text to accompany the videos can be downloaded as a PDF file by clicking the appropriate link.