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  <TITLE>Prepared by R.R. Donnelley Financial -- Form 8-K</TITLE>
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   <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <HR SIZE="4" NOSHADE COLOR="#000000" ALIGN="left"><DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV><FONT
  SIZE="1">&nbsp;</FONT></DIV> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="5" COLOR="#000000"><B>SECURITIES AND EXCHANGE COMMISSION </B></FONT></DIV> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="3" COLOR="#000000"><B>Washington,
  D.C. 20549 </B></FONT></DIV> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <HR NOSHADE WIDTH="17%" COLOR="#000000"><DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="5" COLOR="#000000"><B>FORM 8-K
  </B></FONT></DIV> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="3" COLOR="#000000"><B>Current Report Pursuant </B></FONT></DIV> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="3"
  COLOR="#000000"><B>to Section 13 or 15(d) of the </B></FONT></DIV> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="3" COLOR="#000000"><B>Securities Exchange Act of 1934 </B></FONT></DIV> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV
  ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"><B>Date of report (Date of earliest event reported)&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <U>September 27, 2002 </U> </B></FONT></DIV> <DIV><FONT
  SIZE="1">&nbsp;</FONT></DIV> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="5" COLOR="#000000"><B>UNOCAL CORPORATION </B></FONT></DIV> <HR NOSHADE COLOR="#000000" ALIGN="left"><DIV ALIGN="center"><FONT
  FACE="Times New Roman" SIZE="1" COLOR="#000000"><B>(Exact name of registrant as specified in its charter) </B></FONT></DIV> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"><B>Delaware
  </B></FONT></DIV> <HR NOSHADE COLOR="#000000" ALIGN="left"><DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="1" COLOR="#000000"><B>(State or Other Jurisdiction of Incorporation) </B></FONT></DIV> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV
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  <TD VALIGN="bottom" WIDTH="48%" ALIGN="center"> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"><B>1-8483</B></FONT></DIV> </TD>
  <TD VALIGN="bottom" WIDTH="3%"><FONT FACE="Times New Roman" SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
  <TD VALIGN="bottom" WIDTH="48%" ALIGN="center"> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"><B>95-3825062</B></FONT></DIV> </TD> </TR>
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  <TD VALIGN="bottom" WIDTH="48%" ALIGN="center"> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="1" COLOR="#000000"><B>(Commission File Number)</B></FONT></DIV> </TD>
  <TD VALIGN="bottom" WIDTH="3%"><FONT FACE="Times New Roman" SIZE="1">&nbsp;&nbsp;&nbsp;&nbsp;</FONT></TD>
  <TD VALIGN="bottom" WIDTH="48%" ALIGN="center"> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="1" COLOR="#000000"><B>(I.R.S. Employer Identification No.)</B></FONT></DIV> </TD> </TR>
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  <TD VALIGN="bottom" WIDTH="48%" ALIGN="center"> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"><B>2141 Rosecrans Avenue, Suite 4000, El Segundo, California</B></FONT></DIV> </TD>
  <TD VALIGN="bottom" WIDTH="3%"><FONT FACE="Times New Roman" SIZE="1">&nbsp;&nbsp;</FONT></TD>
  <TD VALIGN="bottom" WIDTH="48%" ALIGN="center"> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"><B>90245</B></FONT></DIV> </TD> </TR>
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  <TD VALIGN="bottom" WIDTH="48%" ALIGN="center"> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="1" COLOR="#000000"><B>(Address of Principal Executive Offices)</B></FONT></DIV> </TD>
  <TD VALIGN="bottom" WIDTH="3%"><FONT FACE="Times New Roman" SIZE="1">&nbsp;&nbsp;</FONT></TD>
  <TD VALIGN="bottom" WIDTH="48%" ALIGN="center"> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="1" COLOR="#000000"><B>(Zip Code)</B></FONT></DIV> </TD> </TR>
   </TABLE> </DIV> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"><B>(310) 726-7600 </B></FONT></DIV> <HR NOSHADE COLOR="#000000"
  ALIGN="left"><DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="1" COLOR="#000000"><B>(Registrant&#146;s Telephone Number, Including Area Code) </B></FONT></DIV> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV>
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   <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"><B>Item 5.&nbsp;&nbsp;&nbsp;&nbsp;Other Events. </B></FONT></DIV> <DIV><FONT
  SIZE="1">&nbsp;</FONT></DIV> <DIV><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000"><B><U>Provision for Environmental Remediation</U> </B></FONT></DIV> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV><FONT
  FACE="Times New Roman" SIZE="2" COLOR="#000000">Unocal Corporation (the &#147;Company&#148;) anticipates that its third quarter 2002 reported net earnings will include a provision of approximately $35 million pretax ($22 million after tax), or 9
  cents per share (diluted), for additional reserves for environmental remediation. Substantially all of the anticipated provision, which results from the Company&#146;s regular quarterly review of remediation obligations, relates to closed Company
  facilities and sites previously sold with retained responsibilities. Most of the $35 million was included in the Company&#146;s reported June 30, 2002 estimate of possible additional remediation costs. </FONT></DIV> <DIV><FONT
  SIZE="1">&nbsp;</FONT></DIV> <DIV><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">This provision was not considered in the Company&#146;s earlier estimate of third quarter 2002 reported net earnings in the upper end of the 45 to 55 cents per
  share (diluted) range, included in its Current Report on Form 8-K dated September 4, 2002. The Company now expects reported net earnings per share (diluted) to be in the upper end of a range of 35 to 45 cents for the third quarter 2002. The
  full-year expected range of reported net earnings remains unchanged at $1.60 to $1.80 per share (diluted). </FONT></DIV> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV><FONT FACE="Times New Roman" SIZE="2"
  COLOR="#000000"><I>Forward-looking statements and estimates regarding projected provisions for environmental reserves in this filing are based on assumptions about engineering, operational, regulatory, environmental, political and other
  considerations. Actual results could differ materially as a result of factors discussed in Unocal&#146;s amended 2001 Annual Report on Form 10-K/A and subsequent reports. </I></FONT></DIV> <P></P>
   <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">-1- </FONT></DIV>
  
  
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   <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this
  report to be signed on its behalf by the undersigned, thereunto duly authorized. </FONT></DIV> <DIV><FONT SIZE="1">&nbsp;</FONT></DIV> <DIV ALIGN="right">
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  <TD VALIGN="top" ALIGN="center" WIDTH="62%"> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">UNOCAL CORPORATION</FONT></DIV> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="2"
  COLOR="#000000">(Registrant)</FONT></DIV> </TD> </TR>
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  <TD VALIGN="top" WIDTH="52%"> <DIV><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">Date: September 27, 2002</FONT></DIV> </TD>
  <TD VALIGN="bottom" WIDTH="3%"><FONT FACE="Times New Roman" SIZE="1">&nbsp;</FONT></TD>
  <TD VALIGN="top" WIDTH="3%"> <DIV STYLE="margin-left:2%; text-indent:-2%"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">By:</FONT></DIV> </TD>
  <TD VALIGN="bottom" WIDTH="3%"><FONT FACE="Times New Roman" SIZE="1">&nbsp;</FONT></TD>
  <TD VALIGN="top" ALIGN="center" WIDTH="62%"> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">/s/&nbsp;&nbsp;&nbsp;&nbsp;J<SMALL>OE</SMALL> D. C<SMALL>ECIL&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</SMALL></FONT></DIV>
  <HR NOSHADE COLOR="#000000" ALIGN="left"></TD> </TR>
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  <TD VALIGN="bottom" WIDTH="3%"><FONT FACE="Times New Roman" SIZE="1">&nbsp;</FONT></TD>
  <TD VALIGN="bottom" ALIGN="center" WIDTH="62%"> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">Joe D. Cecil</FONT></DIV> <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">Vice President and
  Comptroller</FONT></DIV> </TD> </TR>
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   <DIV ALIGN="center"><FONT FACE="Times New Roman" SIZE="2" COLOR="#000000">-2- </FONT></DIV>
  
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metadata_filer: {"company-data": {"conformed-name": "UNOCAL CORP", "cik": "0000716039", "assigned-sic": "1311", "irs-number": "953825062", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "001-08483", "film-number": "02775259"}, "business-address": {"street1": "2141 ROSECRANS AVE", "street2": "STE 4000", "city": "EL SEGUNDO", "state": "CA", "zip": "90245", "phone": "3107267600"}, "mail-address": {"street1": "2141 ROSECRANS AVE", "street2": "STE 4000", "city": "EL SEGUNDO", "state": "CA", "zip": "90245"}}
text: Prepared by R.R. Donnelley Financial -- Form 8-K
  SECURITIES AND EXCHANGE COMMISSION
  Washington,
  D.C. 20549
  FORM 8-K
  Current Report Pursuant
  to Section 13 or 15(d) of the
  Securities Exchange Act of 1934
  Date of report (Date of earliest event reported)
  September 27, 2002
  UNOCAL CORPORATION
  (Exact name of registrant as specified in its charter)
  Delaware
  (State or Other Jurisdiction of Incorporation)
  1-8483
  95-3825062
  (Commission File Number)
  (I.R.S. Employer Identification No.)
  2141 Rosecrans Avenue, Suite 4000, El Segundo, California
  90245
  (Address of Principal Executive Offices)
  (Zip Code)
  (310) 726-7600
  (Registrant's Telephone Number, Including Area Code)
  Item 5.    Other Events.
  Provision for Environmental Remediation
  Unocal Corporation (the "Company") anticipates that its third quarter 2002 reported net earnings will include a provision of approximately $35 million pretax ($22 million after tax), or 9
  cents per share (diluted), for additional reserves for environmental remediation. Substantially all of the anticipated provision, which results from the Company's regular quarterly review of remediation obligations, relates to closed Company
  facilities and sites previously sold with retained responsibilities. Most of the $35 million was included in the Company's reported June 30, 2002 estimate of possible additional remediation costs.
  This provision was not considered in the Company's earlier estimate of third quarter 2002 reported net earnings in the upper end of the 45 to 55 cents per
  share (diluted) range, included in its Current Report on Form 8-K dated September 4, 2002. The Company now expects reported net earnings per share (diluted) to be in the upper end of a range of 35 to 45 cents for the third quarter 2002. The
  full-year expected range of reported net earnings remains unchanged at $1.60 to $1.80 per share (diluted).
  Forward-looking statements and estimates regarding projected provisions for environmental reserves in this filing are based on assumptions about engineering, operational, regulatory, environmental, political and other
  considerations. Actual results could differ materially as a result of factors discussed in Unocal's amended 2001 Annual Report on Form 10-K/A and subsequent reports.
  -1-
  Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this
  report to be signed on its behalf by the undersigned, thereunto duly authorized.
  UNOCAL CORPORATION
  (Registrant)
  Date: September 27, 2002
  By:
  /s/    J
  OE
  D. C
  ECIL
  Joe D. Cecil
  Vice President and
  Comptroller
  -2-