As you may know a spreadsheet is a program for organization and analysis of information in tabular way. Spreadsheets developed as computerized simulations of paper accounting worksheets. The program operates on data expressed as cells of an array, organized in rows and columns. Each cell of the array is a model–view–controller element that can contain either numeric or text data, or the results of formulas that automatically calculate and display a value based on the contents of other cells.
Epicentral is a network-based application that displays a global map of earthquake epicenters for events that occurred during the last week. The information can be browsed graphically and in tabular format. The data are served by the U.S. Geological Survey. List updates are possible each time the application is launched and take a few 10's of seconds (on the Edge, G3, or wireless networks). For each event, links are provided to connect to the event-specific USGS earthquake information page,