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Knowledge discovery in an earthquake text database: correlation between significant earthquakes and the time of day

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3 Author(s)
Goldman, J.A. ; Dept. of Comput. Sci., California Univ., Los Angeles, CA, USA ; Parker, D.S. ; Chu, W.W.

The authors take a real world application from a text database and present a case history. The techniques ultimately led to a discovery contradicting an accepted paradigm in seismology. Using simple, tailored, keyword extraction, they examined a text collection of earthquake data. A discovery was made when an unusual pattern emerged from the text. They then tested a more comprehensive numerical database, treating the the text discovery as a hypothesis. It was verified using a standard χ2 statistic. The hypothesis was significant earthquakes in the longitude regions that include California, occur more often in the morning hours than any other time of day

Published in:

Scientific and Statistical Database Management, 1997. Proceedings., Ninth International Conference on

Date of Conference:

11-13 Aug 1997