Michael Hodges, Chris Kohlenberger, Nolan Mattox, and Christian Vanderwall

Michael Hodges, Chris Kohlenberger, Nolan Mattox, and Christian Vanderwall

Seismic Hazard Map PluginImprovement of ShakeMap Plugin

Custom Color Maps

USEIT Development Team II

What is a ShakeMap?• Representation of ground

shaking, not magnitude• Data gaps common due to lack

of instruments– Predicted values added in these

areas• Produced by USGS after

earthquakes to assess possible damage and plan response

• Modeling scenario earthquakes such as Shakeout

• Map Types:– Peak Acceleration– Peak Velocity– Spectral Response– Rapid Instrumental Intensity

Source: http://earthquake.usgs.gov/earthquakes/shakemap/sc/shake/Landers/

What is a Seismic Hazard Map?• Probability of exceeding a certain

amount of ground shaking, or ground motion, in 50 years

• Hazard depends on magnitudes and locations of likely earthquakes, how often they occur, and properties of local rocks and sediments

• Applications of Hazard Maps:– Building Codes– Highway bridge design– Insurance rates– Business and land-use planning– Estimations of stability and landslide

potentials of hillsides– Construction standards for waste-disposal

facilities– Retrofit priorities– Allocation planning of assistance funds for

education and preparedness (FEMA)– Concerned general publicSource: http://earthquake.usgs.gov/hazards/products/conterminous/2008/maps/wus/2hzSA.wus2pc50.jpg

Custom Color Maps

Landers ShakeMap (CPT)

Landers ShakeMap (Custom Smooth)

Landers ShakeMap (Custom Discrete)

Landers ShakeMap (Magnitude Threshold)Custom Color Map GUI

Seismic Hazard Map Plugin

Western US Peak Ground Acceleration, 2% in 50 years, 1150m/s

ShakeMap Plugin

User Generated ShakeMap

ShakeMap Interface

Earthquake Statistics Calculator

• Calculates magnitude-frequency distribution of an earthquake catalog

• Compares with Gutenberg-Richter Law– b =

• Graph displays cumulative and incremental distribution

• Useful for testing completeness and validity of a series of earthquakes within a given catalog

Graph of Magnitude Frequency Distribution for Felzer Catalog