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Geologic Hazards Science Center

The Geologic Hazards Science Center (GHSC), on the Colorado School of Mines campus, is home to the National Earthquake Information Center (NEIC), many scientists in the Earthquake Hazards Program and Landslide Hazards Program, as well as the Geomagnetism Program staff.

News

Great Salt Lake sediments record thousands of years of earthquake history

Great Salt Lake sediments record thousands of years of earthquake history

The Loneliest Seismometers on Earth

The Loneliest Seismometers on Earth

What a Solar Superstorm Could Mean for the US

What a Solar Superstorm Could Mean for the US

Publications

An examination of the reasons for, and variability of, the differences between response spectra and pseudo response spectra An examination of the reasons for, and variability of, the differences between response spectra and pseudo response spectra

For many decades, it has been common practice to overlook the differences between response spectra and pseudo response spectra. This practice stems from analyses indicating that the average difference between response spectra and pseudo response spectra is negligible for a viscous damping ratio of 5%, which is near-universally adopted. As others have shown, the differences depend...
Authors
Eric M. Thompson, David M. Boore

Evaluation of seismological evidence for decadal changes in Earth’s lowermost mantle and outer core Evaluation of seismological evidence for decadal changes in Earth’s lowermost mantle and outer core

Recent reports of decadal-scale structural changes in the lowermost mantle and transport of strong heterogeneity in the outer core may offer important insights into core-mantle structure and dynamics. These reports are derived from waveform comparisons of earthquake pairs or repeating earthquakes, particularly using differential travel-time measurements made with cross-correlation...
Authors
Yi Yang, Changhui Li, Adam T. Ringler, Xinyu Jiang, Kaixin Wu, Xiaodong Song
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