The first sample of data was downloaded through the ROV serial connection on 22 April 2002. This was 10 days after the sensor was completely installed (JD 101). The first few days, the temperature within the sensor housing rose several degrees, but then stabilized. The sensor began to settle and the mass weights slowly shifted over time. From the horizontal component mass position drift behavior, it appears that the pressure vessel is settling and tilting in an apparent southwesterly direction.The sensor was recentered before the ROV departed on April 22 so that new data should be improved. The data will again be sampled when we visit the site on 14 May 2002.
Figure 1: Vertical component mass position
Figure 2: North component mass position
Figure 3: East component mass position
Figure 4: Local earthquake data
Figure 5: Earthquake data off the coast of Mexico
Figure 6: The broadband velocity background noise amplitude spectra