June 7 The U.S. average retail price for regular gasoline topped $4 a gallon for the first time. (EIA, Reuters)

June 15 Saudi Arabia said that it would boost output to 9.7 million barrels per day (bbl/d) in July. That would be a rise of 600,000 bbl/d since April, and would take Saudi crude output to its highest monthly rate since August 1981, according to EIA data. (EIA, Reuters)

June 19 China raised retail gasoline and diesel prices by up to 18 percent. The increase in regulated fuel prices was China's first hike in eight months and its sharpest ever one-off rise. (Reuters)

June 19 Shell announced it had shut-in production at its 225,000 bbl/d Bonga field in Nigeria as a result of attacks by the Movement for the Emancipation of the Niger Delta (MEND). The field is located 75 miles offshore and force majeure on shipments was announced for June and July. (Bloomberg)

June 20 Chevron declared force majeure on Escravos exports from Nigeria after angry youths blew up a pipeline causing 120,000 bbl/d of the company’s production to be shut-in. (AP)

June 22 Major producers, consumers and top oil company executives gathered in Jeddah, Saudi Arabia to try to discuss high oil prices. The final communiqué emphasized the importance of greater transparency in oil markets and more investment in production. (Reuters)

June 27 The NYMEX near-month WTI contract rose to over $140 per barrel for the first time, settling at $140.21 per barrel. Oil prices have doubled from $70 a year ago. (Reuters)