SEMPRA ENERGY (SRE)

UNITED STATES

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): March 20, 2012

SEMPRA ENERGY

Registrant’s telephone number, including area code: (619) 696-2034

None.

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

On March 23, 2012, Sempra Energy (the “Company”) closed the public offering and sale of $600,000,000 aggregate principal amount of its 2.30% Notes due 2017 (the “Notes”). Proceeds to the Company (after deducting underwriting discounts but before other expenses estimated at approximately $250,000) for the Notes were 99.348% of the aggregate principal amount of the Notes. The sale of the Notes was registered under the Company’s Registration Statement on Form S-3 (Registration No. 333-176855). The Notes will mature on April 1, 2017. Interest on the Notes accrues from March 23, 2012 and is payable on April 1 and October 1 of each year, beginning on October 1, 2012. The Notes will be redeemable prior to maturity, at the Company’s option, at the redemption prices and under the circumstances described in the form of Note, which form is attached hereto in Exhibit 4.1. Further information regarding the sale of the Notes is contained in the underwriting agreement, dated March 20, 2012, which is attached hereto as Exhibit 1.1.

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.