Number | Name | Date | Kind |
---|---|---|---|
4066992 | Buller et al. | Jan 1978 | |
4612506 | Varotsos et al. | Sep 1986 | |
4884030 | Naville et al. | Nov 1989 | |
4904943 | Takahashi | Feb 1990 | |
5521508 | Merzer | May 1996 |
Entry |
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Fujinawa et al, "ULF Underground Electric Field VAriations as Imminent Precursors of Earthquakes," Earthquake Journal, vol. 43, pp. 287-290, Jun. 1990. |
Takahashi et al, "Locating source regions of pre-cursory seismo-electric fields and the mechanism generating electric field variations," Phy. Earth Planet. Inter. (Neatherlands) vol. 77, No. 1-2, pp. 33-38, Apr. 1993. |