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Table 3 Details of the geoelectric voltage observations at Memambetsu from 1948 to the present

From: The characteristics of geoelectric fields at Kakioka, Kanoya, and Memambetsu inferred from voltage measurements during 2000 to 2011

  Start date Coordinate Length (m) Electrode
     Type Size (m × m) Number/site Depth (m)
N-S line 1 January 1950 G 195 C 0.5 × 0.05 4 2.5
1 January 1956 G 900 C 0.5 × 0.05 1 to 2 ~3
1 July 1961 G 400 C 0.3 × 0.03 2 ~3
1 January 1970 G 130 C 0.3 × 0.03 2 ~3
1 December 2001 G 300 Cu 0.6 × 0.36 1 ~3
E-W line 1 January 1950 G 160 C 0.5 × 0.05 4 2.5
1 January 1956 G 700 C 0.5 × 0.05 1 to 2 ~3
1 July 1961 G 350 C 0.3 × 0.03 2 ~3
1 January 1970 G 150 C 0.3 × 0.03 2 ~3
1 December 2001 G 300 Cu 0.6 × 0.36 1 ~3
  1. Abbreviations and symbols are the same as in Table 1.
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