3D Seismic Update

Rockhopper Exploration plc
10 September 2007




Press Release

For immediate release: 10 September 2007



         Rockhopper Exploration receives final processed 3D data volume


Rockhopper Exploration plc ('Rockhopper') is pleased to announce it has received
the final processed volume of 3D data collected by CGG between November 2006 and
January 2007. The survey covered an area of over 850 km2 and the additional time
taken to process this data was used to further improve the quality of the data.

Interpretation of this data will now commence and is likely to be completed
within three months.

The data was collected over licences PL032 and PL033 where Rockhopper holds a
100% interest in both licences. Two wells were drilled by Shell on this acreage
during 1998. Live oil was recovered from one, while oil and gas shows were found
in the other.


NB: This statement has been approved by the Company's geological staff who
include David Bodecott (Exploration Director), who is a Member of Petroleum
Exploration Society of Great Britain (PESGB) and the American Association of
Petroleum Geologists (AAPG) with over 30 years of experience in petroleum
exploration and management, for the purpose of the Guidance Note for Mining, Oil
and Gas Companies issued by the London Stock Exchange in respect of AIM
companies, which outline standards of disclosure for mineral projects.




For further information, please contact:

Rockhopper Exploration plc                     www.rockhopperexploration.co.uk
Sam Moody - Managing Director                  01722 414 419

Aquila Financial Ltd                           www.aquila-financial.com
Peter Reilly                                   020 7202 2601
Yvonne Fraser                                  020 7202 2609

Landsbanki Securities (UK) Limited - Corporate Finance
Andrew Matharu                                 020 7426 9000
Tom Hulme



Notes to editors

www.rockhopperexploration.co.uk

The Rockhopper Group started trading in February 2004 to invest in and carry out
an offshore oil exploration programme to the north of the Falkland Islands. The
Group, floated on AIM in August 2005, is currently the largest licence holder in
the North Falkland Basin and has a 100 per cent. interest in four offshore
production licences which cover approximately 5,800 sq. km. These licences have
been granted by the Falkland Islands government.





                      This information is provided by RNS
            The company news service from the London Stock Exchange