Indendent: Thousands of Spanish homeowners on a 200km stretch of Mediterranean coastline have suffered a month of sleepless nights after a wave of minor earthquakes. Many people, including the country’s Minister of Industry, say a massive offshore gas storage plant could be to blame. More than 300 earthquakes, some of them as strong as 4.2 on the Richter scale, have struck the region of northern Valencia and the southern tip of Catalonia, which is not known for seismic activity. More than 20 quakes struck…