The Drift River Oil Terminal in Alaska is in the firing line of active volcano Mount Redoubt, as strong seismic tremors shook the area on Friday 30 January.
Scientists expect an imminent explosion at the volcano towering over the crude oil storage terminal.
After several weeks of growing explosions 20 years ago Mount Redoubt erupted, triggering floods and spewing pumice into the atmosphere, forcing helicopters to rescue oil workers.
The crude oil storage tanks at The Drift River Oil Terminal, operated by US energy company Chevron, still sit at the foot of the volcano, sparking debates about what to do with the oil.
Approximately 900,000 barrels of crude were stored on the river's 100-year floodplain around the time of the last explosion.
Since the first explosion oil levels were eventually reduced, then the tanks were emptied. For more than a week that meant shutting down production on oil platforms, because there was no place to send the oil.
Chevron has not released any information about current storage volume. However, State and federal oil spill officials say the storage at Drift River is being reduced.
The operators are keeping their levels down, Dianne Munson, with the state Department of Environmental Conservation, remarks. Munson says the terminal has seven 270,000 barrel tanks.
A new protective dike built around the tanks at Drift River is designed to steer waters away from the facility if another flood occurs.
During a flood on 2 January 1990 the Drift River was pushing an estimated 8,000 m3 of muddy water per second into Cook Inlet.
That flood swamped the secondary containment around the oil tanks. No oil leaked, but the power generation system at the facility flooded, eradicating efforts to resume pumping oil.
A tanker is now at Drift River taking on oil. The tanker will carry the product to Nikiski, where Tesoro has a refinery.