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[1] The earthquake epicenter database includes information from the National Oceanic and Atmospheric Administration (NOAA) National Geophysical Data Center (NGDC) Catalog of Significant Earthquakes (2150 B.C. to present) and Database for Instrumentally Recorded Earthquakes (1962 to present). Detailed information on these and all other Hazard Atlas layers are included under the Atlas Info link from the main page of the Atlas, as well as in associated metadata documents.

[2] Intensity is a measure of the effect of an earthquake on the Earth’s surface. The Modified Mercalli intensity scale has 12 levels, ranging from I (not felt) to XII (total damage), and is widely used in the U.S. by the U.S. Geological Survey, the Federal Emergency Management Agency (FEMA), and other organizations.

Leo A. Wrobel has more than 30 years of experience with a host of firms engaged in banking, manufacturing, telecommunications services, and government. An active author and technical futurist, he has published 10 books and more than 400 trade articles on a wide variety of technical subjects. Leo served 10 years as an elected mayor and city councilman (but says he is better now). A sought-after speaker, he has lectured throughout the United States and overseas and has appeared on several television news programs. Leo is presently CEO of Dallas-based TelLAWCom Labs Inc. and b4Ci, Inc. Contact Leo at 214-888-1300 or email leo@b4ci.com.

Sharon M. (Ford) Wrobel served as corporate secretary and director of personnel for Premiere Network Services Inc. prior to joining b4Ci, Inc. in 2004. During that time, Sharon was instrumental in getting Premiere certified as the first CLEC to be certified in all 50 states, by aiding in filings and attending hearings. She also engaged in extensive research for Premiere, a function she continues with b4Ci as vice president of business development. Sharon was also president of the Ellis County Early Childhood PTA and the Ovilla Lions Club. She attended the University of Maryland and El Centro College in Dallas and received training as a registered nurse before joining Leo in business in the late 1990s. Sharon also served as a public official by accepting appointments to the local Planning and Zoning Commission and the Historical Commission.

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