Geologic Hazards Science Center

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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.

Earthquake Hazards Program

Earthquake Hazards Program

The Earthquake Hazards Program provides research and information products for earthquake loss reduction, including hazard and risk assessments, comprehensive real-time earthquake monitoring, and public outreach.

Earthquake Hazards

Landslide Hazards Program

Landslide Hazards Program

The National Landslide Hazards Program strives to reduce long-term losses from landslide hazards by improving our understanding of the causes of ground failure and suggesting mitigation strategies.

Landslide Hazards

Geomagnetism
Program

Geomagnetism  <br />Program

The Geomagnetism Program provides continuous records of magnetic field variations; disseminates magnetic data; and conducts research into the nature of geomagnetic variations for purposes of scientific understanding and hazard mitigation.

Geomagnetism

News

2014 South Napa Earthquake in California
May 15, 2017

Early on the morning of August 24, 2014, Loren Turner was awoken by clattering window blinds, a moving bed, and the sound of water splashing out of his backyard pool. He experienced what is now named the “South Napa Earthquake.” 

USGS logo
February 17, 2017

Small variations in the density of the earth’s crust—undetectable to humans without sensitive instruments—influence where earthquakes may occur in the central United States. These new findings from the U.S. Geological Survey, published today in Nature Communications, may allow scientists to map where future seismicity in the center of the country is most likely.

K2 Seismic Station
February 2, 2017

The U. S. Geological Survey is seeking volunteers to host temporary seismic stations in the Walnut Creek/Pleasant Hill/Concord California area. Volunteers will be assisting with a new ground motion study that will begin in March 2017.

Publications

Year Published: 2017

PhasePApy: A robust pure Python package for automatic identification of seismic phases

We developed a Python phase identification package: the PhasePApy for earthquake data processing and near‐real‐time monitoring. The package takes advantage of the growing number of Python libraries including Obspy. All the data formats supported by Obspy can be supported within the PhasePApy. The PhasePApy has two subpackages: the PhasePicker and...

Chen, Chen; Holland, Austin

Year Published: 2017

Influence of lithostatic stress on earthquake stress drops in North America

We estimate stress drops for earthquakes in and near the continental United States using the method of spectral ratios. The ratio of acceleration spectra between collocated earthquakes recorded at a given station removes the effects of path and recording site and yields source parameters including corner frequency for, and the ratio of seismic...

Boyd, Oliver; McNamara, Daniel E.; Hartzell, Stephen; Choy, George
Boyd, O. S., D. E. McNamara, S. Hartzell, and G. Choy (2017), Influence of Lithostatic Stress on Earthquake Stress Drops in North America, Bulletin of the Seismological Society of America, 107(2), doi:10.1785/0120160219.

Year Published: 2017

The finite, kinematic rupture properties of great-sized earthquakes since 1990

Here, I present a database of >160 finite fault models for all earthquakes of M 7.5 and above since 1990, created using a consistent modeling approach. The use of a common approach facilitates easier comparisons between models, and reduces uncertainties that arise when comparing models generated by different authors, data sets and modeling...

Hayes, Gavin
Hayes G.P. The finite, kinematic rupture properties of great-sized earthquakes since 1990 Earth and Planetary Science Letters, Volume 468, p. 94-100.