To find data on recent earthquake activity I went to the U.S. governments data portal Data.gov, which is a clearinghouse for thousands of maps and datasets. I found data on earthquakes for the past 7 days.The link to this data is here. When you go to the webpage you will see that you can download the data in .csv or in .kml both of which are readable in Cartographica. I downloaded the file as a .csv. Note: when you download the data you may have to save it as a .txt file and then open it in a spreadsheet application. The spreadsheet application should be able to read the file as a .csv. You can then save the .txt file as a .csv.