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Top stories summarized by our editors
Top stories summarized by our editors

SpecOps taps Sierra Nevada for $700M RFCM systems contract

7/6/2020

The US Special Operations Command has selected Sierra Nevada to build and deliver radio frequency countermeasure systems under a $700 million contract. The systems will be incorporated into MC-130J Commando II and AC-130J Ghostrider aircraft.

ULA to launch Sierra Nevada cargo space plane into orbit

7/21/2017

Sierra Nevada has tapped United Launch Alliance to carry the company's Dream Chaser cargo space plane into orbit in 2020. "ULA is an important player in the market and we appreciate their history and continued contributions to space flights and are pleased to support the aerospace community in Colorado and Alabama," said Sierra Nevada's Mark Sirangelo.

Seasonal water cycle in Calif. causes fault movement, study says

6/16/2017

Winter snow and rain depress the Sierra Nevada and coastal mountains in California, but the dry summer brings the crust back up, resulting in an increase in seismic activity, a University of California at Berkeley study says. The weight shift causes up to a 10% increase in fault movement, say scientists, who used GPS data to track mountain depression and computer models to calculate stress levels.

Flood risk in Calif. as more snow falls

4/3/2017

Snow in the Sierra Nevada has added to a snowpack that already beats the average at 164% of typical levels, causing researchers to warn that flooding is likely when the snow melts. Storms in California over the winter have left storm control systems under pressure, creating the growing flood risk.

Calif. mountains have historically low snowpack

9/17/2015

California's Sierra Nevada last winter had just 5% as much snow covering it as usual -- bad news for a drought-stricken state that relies on snowmelt to fill its reservoirs. "We expected it to be bad, but we certainly didn't expect it to be the worst in the past 500 years," said Valerie Trouet, one of the authors of the study.

Calif. mountains have historically low snowpack

9/15/2015

California's Sierra Nevada mountains last winter had just 5% as much snow covering them as usual -- bad news for a drought-stricken state that relies on snowmelt to fill its reservoirs. "We expected it to be bad, but we certainly didn't expect it to be the worst in the past 500 years," said Valerie Trouet, one of the authors of the study.