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ION Geophysical Corporation -- Moody's withdraws ratings for ION Geophysical

Moody's Investors Service ("Moody's") has withdrawn all assigned ratings for ION Geophysical Corporation (ION), including the Caa2 Corporate Family Rating (CFR), following the repayment of its rated debt. Please refer to the Moody's Investors Service's Policy for Withdrawal of Credit Ratings, available on its website at www.moodys.com.