Abstract
Huge amount of digital data of the Great East Japan Earthquake is provided by the highly-developed digital data delivery system and storage technology. But as of now, the method and/or technique for analysis is not yet satisfactory. This paper proposes a running spectrum technique of text data for the purpose of analyzing changes or trend along the disaster management cycle. For verification of this technique, news reported by the newspaper Fukushima Minpo has been used. The result shows the characteristics of data change in the time domain.
