[1] Natl Geophys Res Inst, Hyderabad 500007, Andhra Pradesh, India
[2] Curtin Univ Technol, Dept Appl Geol, Perth, WA, Australia
[3] Cornell Univ, Inst Study Continents, Ithaca, NY 14853 USA
[4] Kochi Univ, Dept Nat Environm Sci, Kochi 7808520, Japan