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|        |                                                                                              |
|--------|----------------------------------------------------------------------------------------------|
| þ | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |

|        |                                                                                               |
|--------|-----------------------------------------------------------------------------------------------|
| ¨ | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 |

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|---------------------------------------------------------------|
|                                                               |  |
| DELAWARE                                                      | 06-0842255 |
| (State or other jurisdiction ofincorporation or organization) | (I.R.S. EmployerIdentification No.) |
|                                                          |   |
| 1775 Sherman Street, Suite 1950, Denver, CO                   | 80203 |
| (Address of principal executive offices)                      | (Zip Code) |

|                                   |
|-----------------------------------|
|                                   |  |  |  |
| Large accelerated filer | o | Accelerated filer | o |
| Non-accelerated filer             | o (Do not check if a smaller reporting company) | Smaller reporting company | þ |

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|--------------|
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| 3.1          | Restated Certificate of Incorporation as filed on May 4, 1987 with the State of Delaware, as amended by an Amendment of Article Twelfth as filed on February 12, 1988 with the State of Delaware (filed as Exhibit 4.B. to the registrant's Registration Statement on Form S-8 filed on January 14, 1999 (Registration No. 333-70567) and incorporated herein by reference). |
| 3.2          | Certificate of Amendment of Restated Certificate of Incorporation as filed on December 26, 2000 with the State of Delaware (filed as Exhibit 3(a) to the registrant's Quarterly Report on Form 10-Q filed on February 13, 2001 and incorporated herein by reference). |
| 3.3          | Certificate of Amendment of Restated Certificate of Incorporation related to Articles Twelfth and Fourteenth as filed on October 15, 2009 with the State of Delaware (filed as Exhibit 3.3 to the registrant's Quarterly Report on Form 10-Q filed on February 16, 2010 and incorporated herein by reference). |
| 3.4          | Certificate of Amendment of Restated Certificate of Incorporation related to Article Thirteenth as filed on October 15, 2009 with the State of Delaware (filed as Exhibit 3.4 to the registrant's Quarterly Report on Form 10-Q filed on February 16, 2010 and incorporated herein by reference). |
| 3.5          | Certificate of Amendment of Restated Certificate of Incorporation related to Article Fourth as filed on December 10, 2010 with the State of Delaware (filed as Exhibit 3.1 to the registrant's Current Report on Form 8-K filed on December 13, 2010 and incorporated herein by reference). |
| 3.6          | By-Laws, as amended on March 10, 2010 (filed as Exhibit 3.1 to the registrant's Current Report on Form 8-K filed on March 15, 2010 and incorporated herein by reference). |
| 10.1 *+      | Employment Agreement dated August 28, 2012 between Magellan Petroleum Corporation and C. Mark Brannum. |
| 10.2 *+ | Nonqualified Stock Option Award and Subscription Agreement dated August 28, 2012, between Magellan Petroleum Corporation and C. Mark Brannum. |
| 10.3 *+      | Restricted Stock Award and Subscription Agreement dated August 28, 2012, between Magellan Petroleum Corporation and C. Mark Brannum. |
| 10.4 *+      | Indemnification Agreement dated September 5, 2012, between Magellan Petroleum Corporation and C. Mark Brannum. |
| 10.5 *+      | Indemnification Agreement dated November 30, 2011, between Magellan Petroleum Corporation and Milam Randolph Pharo. |
| 10.6 *+      | Letter Agreement dated September 7, 2012, between Magellan Petroleum Corporation and Nikolay V. Bogachev. |
| 10.7         | Agreement for 2-D and 3-D Data Acquisition Services dated October 26, 2012, between Magellan Petroleum (Offshore) PTY LTD and Seabird Exploration FZ LLC (filed as Exhibit 10.7 to the registrant's Quarterly Report on Form 10-Q filed on November 9, 2012 and incorporated herein by reference). |
| 31.1         | Certification of John Thomas Wilson, President and Chief Executive Officer, pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934 (filed as Exhibit 31.1 to the registrant's Quarterly Report on Form 10-Q filed on November 9, 2012 and incorporated herein by reference). |
| 31.2         | Certification of Antoine J. Lafargue, Vice President - Chief Financial Officer and Treasurer, pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934 (filed as Exhibit 31.2 to the registrant's Quarterly Report on Form 10-Q filed on November 9, 2012 and incorporated herein by reference). |
| 31.3 *       | Certification of John Thomas Wilson, President and Chief Executive Officer, pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934. |
| 31.4 *       | Certification of Antoine J. Lafargue, Vice President - Chief Financial Officer and Treasurer, pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934. |
| 32.1         | Certification of John Thomas Wilson, President and Chief Executive Officer, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished as Exhibit 32.1 to the registrant's Quarterly Report on Form 10-Q filed on November 9, 2012 and incorporated herein by reference). |
| 32.2         | Certification of Antoine J. Lafargue, Vice President - Chief Financial Officer and Treasurer, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (furnished as Exhibit 32.2 to the registrant's Quarterly Report on Form 10-Q filed on November 9, 2012 and incorporated herein by reference). |

|            |
|------------|
|            |  |
| 101.INS ** | XBRL Instance Document |
| 101.SCH ** | XBRL Taxonomy Extension Schema Document |
| 101.CAL ** | XBRL Taxonomy Extension Calculation Linkbase Document |
| 101.DEF ** | Taxonomy Extension Definition Linkbase Document |
| 101.LAB ** | Taxonomy Extension Label Linkbase Document |
| 101.PRE ** | Taxonomy Extension Presentation Linkbase Document |

|   |                 |
|---|-----------------|
| * | Filed herewith. |

|    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
|----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| ** | Previously furnished with the registrant's Quarterly Report on Form 10-Q filed on November 9, 2012.  Users of this data submitted electronically are advised pursuant to Rule 406T of Regulation S-T that this interactive data file is deemed not filed or part of a registration statement or prospectus for purposes of sections 11 or 12 of the Securities Act of 1933, is deemed not filed for purposes of section 18 of the Securities Exchange Act of 1934, and otherwise is not subject to liability under these sections. |

|   |                                                          |
|---|----------------------------------------------------------|
| + | Management contract or compensatory plan or arrangement. |

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|        |
|--------|
|        |  |  |  |
|   |   | MAGELLAN PETROLEUM CORPORATION |
|   |   | (Registrant) |
|   |   |   |   |
|   |   | By: | /s/ J. Thomas Wilson |
|   |   |   | John Thomas Wilson, President and Chief Executive Officer |
|   |   |   | (as Principal Executive Officer) |
|   |   |   |   |
|   |   | By: | /s/ Antoine J. Lafargue |
|   |   |   | Antoine J. Lafargue, Vice President - Chief Financial Officer and Treasurer |
|   |   |   | (as Principal Financial and Accounting Officer) |
|   |   |   |   |
| Date:  | February 15, 2013 |   |   |