Massive natural gas discoveries in northern Spain are reportedly sufficient to supply the country’s requirements for five years.

Spain’s Basque regional premier Patxi Lopez says that surveys in Alava province have identified 13 unconventional gas holdings totaling 180 billion cubic meters in Gran Enara, which could supply the Basque region for six decades, or the entire nation for five years.

The natural gas deposits are located in shale rock deposits, which would require hydraulic fracturing to release