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Penn State Earthquake Seismology
In concert with the department's geodynamics, earthquake mechanics, volcanology,
and active-source seismology groups, the Penn State earthquake seismology group performs research on earth ...
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Seimic Waves and Earths Interior
Introduction
When you look at a seismogram the wiggles you see are an indication that the ground is being, or was, vibrated by seismic waves. Seismic waves are propagating vibrations that carry ene...
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Earthquake Location Activity
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Charles J. Ammon, Penn State
This is a simple, interactive earthquake location activity developed for use
in introductory earthquake seismology classes. The traditional triangulation
exercises a...
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Search the USGS Earthquake Catalog
Search the USGS Earthquake Catalog
For moderate-size earthquakes, perhaps the best place to look for information information on a moderate-size (say, M ≥ 5) earthquake that occurred since 1973 is the ...
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EAS111 - C4 - Types of Sediment
gravity
strata
Clastic Sediments
Clastic sediments are composed of fragments or grains (or clasts) of other rocks and minerals. We classify clastic sediments based on their grain size:
[Study Figure 4...
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Waves, Seismometers, and Seismograms
The fundamental observations used in seismology (the study of earthquakes) are
seismograms which are a record of the ground motion at a specific location. Seismograms come in many forms, on "smoked" ...