Global Terrorism Database

The Global Terrorism Database (GTD) is a database of incidents of terrorism from 1970 onward (as of February 2017, the list extended through 2015, but excluded the year 1993 due to data issues with that year. 2016 results will be released in Summer 2017). The database is maintained by the National Consortium for the Study of Terrorism and Responses to Terrorism (START) at the University of Maryland, College Park in the United States. It is also the basis for other terrorism-related measures, such as the Global Terrorism Index (GTI) published by the Institute for Economics and Peace.

The GTD describe itself as the "most comprehensive unclassified data base on terrorist events in the world" and includes over 140,000 terrorist attacks. The entire database (about 50 MB) is available for download via the website. The manner of encoding of the data is described in a codebook, also available as PDF download from the website.

In 2001, the University of Maryland, College Park obtained a large database of terrorist attacks from 1970 to 1997 collated by Pinkerton Global Intelligence Services (data from 1993 was missing because it got lost in an office move by Pinkerton, however, some summary data from 1993 is still available). With funding from the National Institute of Justice, the University of Maryland finished digitizing the data in December 2005. In April 2006, the National Consortium for the Study of Terrorism and Responses to Terrorism (START), working with the Center for Terrorism and Intelligence Studies (CETIS), received additional funding from the Human Factors Division of the Department of Homeland Security (DHS) to extend the GTD beyond 1997. The data generated for 1997 to 2007 was then harmonized with the Pinkerton data from 1970 to 1997 to create a unified database of terrorist events from 1970 to 2007 (excluding 1993). New years were periodically added, and as of August 2014, the data goes up to 2014.

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