Map Information: The map is titled, "Forecasted Frequency of Earthquake Shaking Capable of Causing Damage Within the United States". It depicts a map of the continental United States, Puerto Rico, Alaska, and Hawaii and illustrates state and county boundaries. The intensity of forecasted shaking (corresponding to level VI on the Modified Mercalli Intensity scale) is capable of the following: cracking windows; knocking dishes, glassware, knickknacks, and books off shelves and pictures off walls; moving or overturning furniture; and cracking weak plaster, adobe buildings, and some poorly built masonry buildings. Data source is the USGS National Seismic Hazard Mapping Project, updated in the following years: contiguous US-2014, Alaska-2007, Hawaii-1998, Puerto Rico and the US Virgin Islands-2003; forecasted frequency of a horizontal ground acceleration on firm rock of at least 7.2% g, which is an average acceleration corresponding to an MMI of VI. In the map, all frequencies are over a 10,000 year span: very high frequency is defined as more than 50 occurrences, high is between 20 and 50 occurrences, medium is between 4 and 20, and low is fewer than 4.A FEMA logo is in the lower right corner of the map indicating that the map was prepared by ORR Mapping and analysis Center, Washington, DC on 8/7/14 and the Sources are ESRI, HSIP, and USGS.Map description: The map key indicates that the frequency of earthquake shaking is represented by four color coded categories. The first category (using the color code of dark red) represents those areas where the forecasted frequency is very high. The areas of the United States in this category include all of Puerto Rico, most of California and Hawaii, and parts of South Carolina, Tennessee, Kentucky, Illinois, Missouri, Arkansas, Montana, Wyoming, Idaho, Utah, Washington state, Oregon, Nevada, Arizona, and Alaska.The second category (using the color code of dark orange) represents those areas where the forecasted frequency is high. The areas of the United States in this category include the rest of Hawaii, and parts of Maine, New York, New Hampshire, Vermont, Georgia, North and South Carolina, Arkansas, Mississippi, Tennessee, Kentucky, Indiana, Illinois, Missouri, Oklahoma, Montana, Wyoming, Colorado, New Mexico, Idaho, Utah, Arizona, Washington state, Oregon, California, Nevada, and Alaska.The third category (using the color code of light orange) represents those areas where the forecasted frequency is medium. The areas of the United States in this category include the rest of Maine, New Hampshire, Washington state, Oregon, California, and Nevada; all of Massachusetts, Connecticut, and Rhode Island; most of New Jersey, Vermont, Virginia, Kentucky, Oklahoma, Wyoming, Colorado, Idaho, Arizona, New Mexico; and parts of Pennsylvania, Delaware, New York, West Virginia, Ohio, North and South Carolina, Georgia, Alabama, Mississippi, Tennessee, Indiana, Illinois, Missouri, Arkansas, South Dakota, Nebraska, Texas, Montana, Utah, and Alaska.The fourth category (using the color code of pale yellow) represents those areas where the forecasted frequency is low. This category covers a large area of the United States, from central New York south to Florida, west to western Texas, and north to central Montana and the Canadian border. This area also includes the remaining portions of Delaware, New Jersey, Idaho, Arizona, and Alaska, but excludes the previously mentioned areas.
