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 | Horizontal Seismograph Slowed Animation of the vertical seismograph above slowed down to show compressive behavior of the P wave in the direction the wave is traveling and the shearing behavior of the S wave perpendicular to the direction of wave travel. Although the arrow shows gross movement, remember that this happens on a microscopic scale in the Earth. |
 | Earthquakes Scattered Across Globe This animation uses a gridded sphere is to show that: 1) the seismic stations dont need to be lined up longitudinally to create travel-time curves, as they appear in the first animation, and 2) a single station records widely separated earthquakes that plot on the travel-time curves. Remember, a lone seismograph station can only tell how far away the earthquake is, not where it occurred. More info at: www.iris.edu |
 | Earthquake Ground Motion Animation February 21, 2008 Nevada by the 21 February, 2008 Wells, NV earthquake. Each circle represents a seismometer and the colors change to reflect variations in the signal amplitude crossing the array. The ground motion begins near the source and then expands outward like a the waves from a pebble dropped in a pond. The circular wavefornts are distorted by the simple map projection used in the animation. The inital waves travel at about 8km/s, the larger amplitude waves that follow are moving at about 2.5km/s. ... |
 | Earthquake Ground Motion Animation 10-31-2007 Central Cal the vertical ground displacement in the 100-30s period range observed across the western United States by the EarthScope transportable array and generated by the 31 October, 2007 central California earthquake. Each circle represents a seismometer and the colors change to reflect variations in the signal amplitude crossing the array. Near the end of this animation you can see the waves that travel outward from the source roughly east of Monterey Bay). ... seismology earthquakes IRIS US Array ... |
 | Jagger Museum and Hawai'i Volcano Observatory Famed for its fabulous views of Mauna Loa and Kilauea as much as for its interesting exhibits, The Jagger Museum (named for geologist Thomas A. Jagger) is open daily from 8:30a.m. to 5:00p.m. Exhibits include murals by Herb Kawainui Kane, seismograph charts of eruptions and earthquakes, geological displays and display about the natural and human history of the Park. Founded by Dr. Thomas A. Jagger, the Hawaii Volcano Observatory (or, HVO) was the first of its kind in the world. Although ... |
