Exhibit 99.1


                            Explanation of Responses


(1)  Third Point Management Company L.L.C. ("Third Point") may be deemed to have
     beneficial ownership over 5,926,003 shares (the "Shares") of Common Stock
     of Seitel, Inc. (the "Common Stock"), and over warrants to purchase Common
     Stock ("Warrants"), by virtue of the authority granted to Third Point by
     certain managed funds and accounts (collectively, the "Funds") to vote and
     to dispose of the Shares and to dispose of such Warrants. Mr. Daniel S.
     Loeb ("Mr. Loeb") serves as managing member of Third Point and by virtue of
     such position may be deemed to have beneficial ownership over the Shares
     and the foregoing Warrants. Mr. Loeb also serves as a director of Third
     Point Offshore Fund, Ltd. (the "Offshore Fund" and, together with Third
     Point and Mr. Loeb, the "Reporting Persons"), one of the Funds. This filing
     reports the beneficial ownership of the Reporting Persons in the event such
     filing was or is required. The Reporting Persons hereby disclaim any
     beneficial ownership of the securities reported herein for purposes of
     Section 16 of the Securities Exchange Act of 1934 (the "Act") except to the
     extent of their pecuniary interest therein as determined in accordance with
     the Act and the rules adopted thereunder. This report includes all Shares
     held as of the date upon which the Reporting Persons first became subject
     to the reporting requirements of Section 16 of the Act with respect to the
     Shares. All subsequent transactions in the Shares by the Reporting Persons
     shall be reported on Form 4.