Three component detector and housing for same

A seismic detector comprising a frame having a support portion and three geophones affixed to said frame so that the principal axis of sensitivity of each geophone forms an angle of about A with a first plane crossing through a portion of said frame and the projection of the principal axis of sensitivity of any one geophone on said first plane intersects with the projections of the principal axis of sensitivity of the other two geophones, the support portion of said frame extending in a direction generally normal to said first plane.

A method for constructing a geophone housing comprising:

• placing three boreholes in a body, each borehole being inclined at about an angle A from a plane passing through said body with none of said boreholes being parallel and fastening a support member to said body, said support member extending from said body in a direction generally normally to said plane.

A method for constructing a seismic detector comprising affixing three geophones to a frame having a support portion extending in a direction generally normal to a first plane crossing through a portion of said frame, said geophones being affixed to said frame so that the principal axis of sensitivity of each geophone forms an angle of about A with said first plane and the projection of the principal axis of sensitivity of any one geophone on said first plane intersects with the projections of the principal axes of sensitivity of the other two geophones.

A method of orienting three geophones with respect to the earth to detect particle motion waves comprising affixing to the earth a support member having three geophones attached thereto and orienting the support member so that each geophone has its principal axis of sensitivity oriented at about an angle A of between 5.degree. and 85.degree. with respect to the horizon.