UPDATE 1-No quake impact at Valero, BP L.A.-area refineries

(Updates throughout)

NEW YORK, May 18 (Reuters) - Production at California refineries owned by Valero Energy Corp (VLO.N: Quote, Profile, Research), BP (BP.L: Quote, Profile, Research) and Tesoro Petroleum Corp (TSO.N: Quote, Profile, Research) were not impacted by an earthquake that hit the region late Sunday, sources said on Monday.

Crews are currently inspecting Valero's 135,000-barrel-per-day refinery, but there are no signs of impact on pipelines or storage facilities around the refinery, Valero spokesman Bill Day said.

A source familiar with refinery operations said that BP's 266,000-barrel-per-day Carson City refinery is operating according to plan.

Tesoro's 100,000-bpd refinery in Wilmington was also unaffected by the earthquake, company spokesman Lynn Westfall said.

Kinder Morgan Energy Partners (KMP.N: Quote, Profile, Research), which operates pipelines in the region, also said operations on its pipelines have not been affected.

Traders in the West Coast cash market said they did not expect the incident to impact the market.

"I don't think it was a market mover," one trader said.

A company representative for Chevron Corp's (CVX.N: Quote, Profile, Research) 260,000-bpd refinery in El Segundo was not immediately available for comment. (Reporting by Rebekah Kebede; Editing by Christian Wiessner)