The initial explosion sent a wave of fire and debris hurtling through the air to two rows of homes nearby.

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Standard seismic exploration typically involves setting off an explosion, then measuring the passage of its shock wave through the ground.

FORBES: Wireless

Mr. MAHTANI: Well, Nigeria is the eighth biggest exporter in the world, and after these wave of attacks last week, which included the hostage taking and an explosion on a pipeline that fed a key export terminal, Nigeria had to shut down about 226, 000 barrels per day, that's about 10% of Nigeria's total production, which are still down.

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