The offshore platform of the European Investment-bank backed Castor gas storage project, is seen off the coast of Alcanar, eastern Spain, October 7, 2013. Spain's government ordered a stop to injections of gas into the Castor Project's submarine natural gas storage facility after a series of small earthquakes struck the coast around the area including a 4.2 magnitude quake, the strongest yet in the region, coinciding with the injection of gas. The public prosecutor in the Spanish city of Castellon has opened an investigation into potential criminal liabilities after hundreds of unusual small earthquakes, possibly linked to a natural gas storage project, have shaken the Valencia coast. Scientists say the earthquakes are likely triggered by natural gas injections at the 1.3 billion euro ($1.8 billion)Castor underground gas storage plant, owned by Spain's ACS and Canada's Dundee Energy. REUTERS/Gustau Nacarino (SPAIN - Tags: ENERGY ENVIRONMENT) FOR BEST QUALITY IMAGE ALSO SEE: GF2EAB417LC01