(19)

(11)

EP 2 409 179 A1

(12)

(43) Date of publication: 25.01.2012 Bulletin 2012/04 (21) Application number: 09841996.3 (22) Date of filing: 16.03.2009

(51) International Patent Classification (IPC):  G01V 1/40(2006.01) (86) International application number: PCT/US2009/037218 (87) International publication number: WO 2010/107421 (23.09.2010 Gazette 2010/38)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR (71) Applicant: Microseismic, Inc. Houston, TX 77042 (US)	(72) Inventors: DUNCAN, Peter, M. Houston TX 77077 (US) LAKINGS, James, D. Houston TX 77007 (US) (74) Representative: Boura, Olivier et al Cabinet Beau de Loménie 158, rue de l'Université 75340 Paris Cedex 07 75340 Paris Cedex 07 (FR)