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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>SEISMIC_SHAKING_PREDICTED_RESPONSE_RP35_IN is a polygon shapefile that shows the distribution and classification of National Earthquake Hazards Reduction Program (NEHRP) soil types. This shapefile represents the first attempt to assign reasonable NEHRP soil classifications to the geologic materials throughout Indiana. The NEHRP soil classifications are based on geologic and engineering response to earthquake-induced ground shaking. NEHRP links the physical properties of soils, such as shear strength and effect on shear-wave velocity propagation, to ensure a uniform classification for nonlithified materials in the context of their performance when subjected to seismically induced ground shaking. Ranked A through F, the correct NEHRP soil class is best determined from the average shear-wave velocity of the soil column. Attributes include the following NEHRP soil classes (Hill and Foshee, 2008, Table 1, p. 5): A - Hard rock; average shear-wave velocity greater than 1,500 meters per second; amplification factor equal to 0.08. Note that Class A is not present in Indiana. B - Rock; average shear-wave velocity 760 to 1,500 meters per second; amplification factor equal to 1.0. C - Hard and (or) stiff to very stiff soils, including most gravel; average shear-wave velocity 360 to 760 meters per second; amplification factor equal to 1.1 to 1.2. D - Sands, silts, and (or) stiff to very stiff clays, and some gravel; average shear-wave velocity 180 to 360 meters per second; amplification factor equal to 1.2 to 1.6. E - Small to moderate thickness (10 to 50 feet), soft to medium-stiff clay, plasticity index greater than 20, moisture greater than 40 percent; average shear-wave velocity is less than 180 meters per second; amplification factor equal to 1.2 to 2.5. F - Soils vulnerable to potential failure or collapse under seismic loading, including liquifiable soils, quick and sensitive clays, and collapsible, weakly cemented soils; average shear-wave velocity is not applicable; amplification factor is not applicable. The following is excerpted from Indiana Geological Survey Report of Progress 35: "The distribution and classification of soil types are essential to understanding the response of geologic materials to ground shaking induced by earthquakes. Thirty-seven shear-wave velocities were measured in soft sediments at various localities throughout Indiana, twenty-eight sites of which were measured using downhole methods in freshly augered and cased wells. Purdue University provided eight additional shear-wave profiles from eight sites in their Agricultural Centers; also included is a profile from one other site in Vanderburgh County. These data, coupled with the thickness of the unconsolidated materials, were used to determine the potential amplification of earthquake-induced ground shaking. This report begins the process of defining the response of geologic materials to ground shaking induced by an earthquake having an epicenter within Indiana or nearby states. It is intended to be a tool to enhance the performance of the computer program HAZUS, developed by the U.S. Federal Emergency Management Agency to model the effects of earthquakes and to assess damage scenarios. "Plate 1 of this report, a map of Indiana at a scale of 1:500,000 showing the predicted response of geologic materials to seismically induced ground shaking, is intended only for regional planning purposes and is not a substitute for on-site shear-wave measurements and geotechnical data. Continued field work is anticipated, the results of which will enhance the accuracy and value of the map."</SPAN></P></DIV></DIV></DIV> |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>DATA DISCLAIMER This data set was compiled by Indiana University, Indiana Geological Survey, using data believed to be accurate; however, a degree of error is inherent in all data. This product is distributed "AS-IS" without warranties of any kind, either expressed or implied, including but not limited to warranties of suitability of a particular purpose or use. No attempt has been made in either the designed format or production of these data to define the limits or jurisdiction of any federal, state, or local government. These data are intended for use only at the published scale or smaller and are for reference purposes only. They are not to be construed as a legal document or survey instrument. A detailed on-the-ground survey and historical analysis of a single site may differ from this data. It is requested that the Indiana Geological Survey be cited in any products generated from this data. The following source citation should be included: [SEISMIC_SHAKING_PREDICTED_RESPONSE_RP35_IN: Predicted Responses of Geologic Materials to Seismically Induced Ground Shaking (Indiana Geological Survey, 1:500,000, Polygon Shapefile)] WARRANTY Indiana University, Indiana Geological Survey warrants that the media on which this product is stored will be free from defect in materials and workmanship for ninety (90) days from the date of acquisition. If such a defect is found, return the media to Publication Sales, Indiana Geological Survey, 1001 E 10th St, Bloomington, Indiana 47405-1405, and it will be replaced free of charge. LIMITATION OF WARRANTIES AND LIABILITY Except for the expressed warranty above, the product is provided "AS IS", without any other warranties or conditions, expressed or implied, including, but not limited to, warranties for product quality, or suitability to a particular purpose or use. The risk or liability resulting from the use of this product is assumed by the user. Indiana University, Indiana Geological Survey shares no liability with product users indirect, incidental, special, or consequential damages whatsoever, including, but not limited to, loss of revenue or profit, lost or damaged data or other commercial or economic loss. Indiana University, Indiana Geological Survey is not responsible for claims by a third party. The maximum aggregate liability to the original purchaser shall not exceed the amount paid by you for the product.</SPAN></P></DIV></DIV></DIV> |
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["geoscientificInformation","Indiana Geological Survey (IGS)","Geology","Surficial Geology","Quaternary","Stratigraphy","Earthquake","Ground shaking","Seismic","Soil classification","Shear-wave velocity","National Earthquake Hazard Reductions Program (NEHRP)","Federal Emergency Management Agency (FEMA)","Indiana Department of Homeland Security (IDHS)","Indiana","Adams County","Allen County","Bartholomew County","Benton County","Blackford County","Boone County","Brown County","Carroll County","Cass County","Clark County","Clay County","Clinton County","Crawford County","Daviess County","Dearborn County","Decatur County","Dekalb County","Delaware County","Dubois County","Elkhart County","Fayette County","Floyd County","Fountain County","Franklin County","Fulton County","Gibson County","Grant County","Greene County","Hamilton County","Hancock County","Harrison County","Hendricks County","Henry County","Howard County","Huntington County","Jackson County","Jasper County","Jay County","Jefferson County","Jennings County","Johnson County","Knox County","Kosciusko County","Lagrange County","Lake County","LaPorte County","Lawrence County","Madison County","Marion County","Marshall County","Martin County","Miami County","Monroe County","Montgomery County","Morgan County","Newton County","Noble County","Ohio County","Orange County","Owen County","Parke County","Perry County","Pike County","Porter County","Posey County","Pulaski County","Putnam County","Randolph County","Ripley County","Rush County","Scott County","Shelby County","Spencer County","Starke County","Steuben County","St Joseph County","Sullivan County","Switzerland County","Tippecanoe County","Tipton County","Union County","Vanderburgh County","Vermillion County","Vigo County","Wabash County","Warren County","Warrick County","Washington County","Wayne County","Wells County","White County","Whitley County"] |