Hidden Canyon Trail closed in Zion National Park due to rockfall

ksl.com

ZION NATIONAL PARK — Nine hikers were temporarily trapped Tuesday morning after a rockfall on the Hidden Canyon Trail in Zion National Park, officials said.

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2018 Lake Bonneville Geologic Conference and Short Course

October 3–6, 2018

Utah Department of Natural Resources Auditorium

1594 West North Temple

Salt Lake City, Utah

Please contact Adam McKean with questions (801-537-3386 or adammckean@utah.gov).

With the publication in 2016 of the “Lake Bonneville: A Scientific Update” book, the Utah Geological Survey is interested in bringing together the geologic community to review and discuss relevant research in the Lake Bonneville basin. The goal of the conference and short course is twofold: (1) to provide a setting for the review and discussion of Lake Bonneville/Great Salt Lake geologic research, and (2) provide education and networking opportunities for the local geologic community.

A registration fee of $26 per day will be charged for all participants (lunch, and morning and afternoon snacks will be provided). The short course will be limited to the first 50 participants. REGISTER HERE

For additional information. PRINT FLIER

Utah FORGE Project Completes a Two- and Three-Dimensional Seismic Survey

Last week the Utah FORGE project completed a two- and three-dimensional seismic surveys to further characterize the project area’s buried granite reservoir. Specifically, the survey may help to identify any buried faults that might be zones of fluid flow.

Seismic surveys create subsurface images by generating, recording, and analyzing sound waves that travel through the Earth (such waves are also called seismic waves). Density changes between rock or soil layers reflect the waves back to the surface, and how quickly and strongly the waves are reflected back indicates what lies below.

For the Utah FORGE survey, vehicle-mounted vibrator plates (called vibroseis trucks) generated the source waves and a grid of geophones recorded them. The survey included two 2D surveys that were 2.5 miles long and included approximately 160 source points and geophone receivers each, and a 3D survey that covered 7 square miles and included 1,100 source points and 1,700 geophone receivers. The data is now being processed to generate a three-dimensional map of the subsurface reservoir.

For more a more information on seismic surveys see https://geology.utah.gov/map-pub/survey-notes/glad-you-asked/what-are-seismic-surveys/

Vibroseis truck with geophones (black cases) in the foreground.

 

Vibroseis truck with pickup and workman for scale.

 

 

Vibroseis trucks in action, pads down producing seismic waves.