SO503 Honors Research Methods
Time Series Analysis Lab
Cinna Lomnitz and Sara Nilsen-Hofseth (EOS, 15 Feb 2005) discussed the record of the 2005 megathrust and earthquake in terms of the tide records at several stations, including Adak, AK and Crescent City, CA. They showed periodicity at frequencies of 0.3 to 0.5 milliHertz (0.0003 to 0.00005 Hertz), or periods of about 1 hour. The great earthquake took place on Sunday, December 26, 2004 at 00:58:53 (UTC).
You will get the tide data for Crescent City CA, and Point Reyes CA (to the south, 4 students). Get 6 days before the earthquake and 8 days afterwards. There is a dBase file with the tides for these stations. It has the predicted tide, the observed tide, and the difference between the two.
Update MICRODEM. See the help file on Time Series Analysis, in the Contents Tab, in the "Step by step directions", on how to do time series analysis.
Update the help file for MICRODEM.
Get a dBase file with the tides for Crescent City, CA