(19)

(11)

EP 0 813 725 A1

(12)

(43) Date of publication: 29.12.1997 Bulletin 1997/52 (21) Application number: 95935230.0 (22) Date of filing: 27.09.1995

(51) International Patent Classification (IPC):  G01V 1/ 00( . ) (86) International application number: PCT/US1995/012531 (87) International publication number: WO 1996/027865 (12.09.1996 Gazette 1996/41)

(84) Designated Contracting States: ES GR IT PT Designated Extension States: SI (30) Priority: 03.03.1995 US 19950397789 (71) Applicant: E.R. Earthquake Ltd. 52520 Ramat Gan (IL)	(72) Inventor: ZIVON, Alon 46640 Herzliya (IL) (74) Representative: Cross, Rupert Edward Blount, et al  BOULT WADE TENNANT, 27 Furnival Street London EC4A 1PQ London EC4A 1PQ (GB)