Inclinometry was done as follows :

    Datasets  El Dirn     HST     mean leg temperatures   Humidity
                          start     start   middle   end       %
  ( 20030101  90  cw      10:06      6.2      7.2    8.0      30 )
    20030125  90  cw      04:55      0.4      0.5    0.6     100
    20030126  90  cw      10:25      3.5      4.5    5.5      50

There was an earthquake at approx 06:45 on the 25th, during the inclinometry run : hence the repeat on the 26th. The temperature channels all showed good data, so temperature corrections are applied. The resulting models are compared with previous models as displayed below:

The impact of the earthquake is seen in both difference plots as spikes of ~2" amplitude. Otherwise the data are in no systematic way different from those of the 01^st. The data of the 26^th are adopted for the new track model. This model can be seen here.

• The differences in (F1,F2,F3) are described by the rms scatters of (0.35", 0.48", 0.48") and (0.34", 0.24", 0.37"), respectively c.f. (0.56", 0.64", 0.53") previously. These are undoubtedly slight overestimates due to the earthquake spike.

• Updates have been made to the plots of symmetry and strain gauge data. All looks OK.

• The model was installed at ~09:00 on 27 Jan 2003. As before it is a 'warm' model.