USGS Evening Public Lecture Series
Current Season - 2016 Video Archive
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The Last Land: How humans changed erosion in Hawaii
by Jonathan Stock, Research Geologist and Director, USGS Innovation Center
- Hawaii is one of the last habitable places on Earth reached by humans
- Fromfirst Hawaiian arrivals c.1000-1200 A.D. to now, humans have accelerated erosion
- Dirty water threatens the economic and social assets of the island
- Mapping, monitoring and modeling (M3) can focus cost-eective mitigation
Flyer:Jan16flyer.pdf (Acrobat PDF)
The Gold Rush and the 1906 Earthquake
How they combined to create the breakthrough discovery of modern seismic science
by Ross S. Stein, USGS Scientist Emeritus & Consulting Professor of Geophysics, Stanford University
- Accidents of Gold Rush merchant marine navigation transformed a seismic disaster into a seminal discovery and led to San Francisco's extreme liquefaction vulnerability today.
- Just about everything that we love about the Bay area is brought to us by the faults. We enjoy their daily fruits and so must live with their occasional spoils.
- No one knows when the next damaging quake will strike; we must frame the 'payback period' for seismic expenditures in terms of chance.
Flyer:Feb16flyer.pdf (Acrobat PDF)
Marine Terraces of California: Landscapes from the Waves
by Marjorie Schulz, USGS Research Hydrologist
- Did you know soils on California's marine terraces can be over a million years old?
- Have you wondered why California's rugged shorelines are terraced?
- Soils on marine terraces aid our understanding of soil formation, water movement, and carbon transformations under changing climate.
Flyer: Mar16flyer.pdf (Acrobat PDF)
Untapped Capacity: Our 4,000 Species of Native Bees
So many unknowns and so many potentials
by Sam Droege, USGS Wildlife Biologist
- In secret, Native Bees, not honey bees, do most of our pollinating
- Why we don't know the status of 99% of our Native Bees
- Why are there 400 Native Bees without names
- Why are there 400 Native Bees without names" multiple geologic faults and the ability of one earthquake to trigger others.
- TWhy biodiverse native plant communities = biodivers native bee communities
Flyer: Apr16flyer.pdf (Acrobat PDF)
Forcasting Ashfall Impacts from a Yellowstone Supereruption
by Larry Mastin, USGS Hydrologist
- Yellowstone is one of a few dozen volcanoes on Earth capable of "supereruptions" that expel more than 1,000 cubic km of ash and debris.
- The plumes from such eruptions can rise 30 to 50 km into the atmosphere, three to five times as high as most jets fly.
- Yellowstone has produced three supereruptions in the past 2.1 million years. The most recent was 0.6 million years ago.
- Eruptions this large can create their own continental-scale wind field, pushing ash more than 1,000 km against the prevailing, ambient wind field.
Flyer: May16flyer.pdf (Acrobat PDF)
Mercury and Rice in the California Delta
Lessons Linking Wetlands to Water to Wildlife
by Lisamarie Windham-Myers, USGS Research Ecologist, National Research Program
- Wetlands are hotspots for mercury methylation and export of methylmercury to aquatic foodwebs.
- Rice is the most abundant wetland type in California and globally in temperate and tropical latitudes.
- Physical, chemical and biological Hg transformations are temporally pulsed in agricultural wetlands, due largely to seasonal water management practices.
- Monitoring methylmercury at the right time and location is essential to managing and projecting future exposure for wildlife and humans.
Flyer: June16flyer.pdf (Acrobat PDF)
The USGS California Volcano Observatory
It's not just earthquake country!
by Margaret T Mangan, Scientist-in-Charge, USGS CalVO
- Volcanic Eruptions occur in the State about as frequently as the largest San Andreas Fault Zone earthquakes.
- California's "watch list" volcanoes are dispersed throughout the State and future eruptions are inevitable--the likelihood of renewed volcanism is on the order of 1 in a few hundred to one in a few thousand annually.
Flyer: July16flyer.pdf (Acrobat PDF)
The New Eyes in the Sky
Putting Drones to work for scientific research
by Jeff L. Sloan, Geographer, Project Leader - USGS National Unmanned Systems Project Office
- Why is there so much interest in unmanned technology?
- What are the rules to legally fly within the National Airspace?
- How does this technology increase safety, lower costs, and lead to the collection of better scientific data?
- Will this technology become a commonly used tool for Scientists?
Flyer: Aug16flyer.pdf (Acrobat PDF)
Remembering Mount Pinatubo 25 Years Ago
A look back at one of the largest volcanic eruptions of the 20th century
by John Ewert, Geologist, USGS Cascades Volcano Observatory
- This recording only includes an introduction and follow-up comments by John Ewert. Due to copyright restrictions, it does not include the actual film, which can be purchased from PBS.
- Join us for a special showing of the NOVA film "In the Path of a Killer Volcano".
- This 60-minute film follows USGS scientists as they work with local agencies to monitor the restless volcano and forecast its eruption.
- USGS Geologist John Ewert, featured in the film, will introduce it and be on hand to answer questions afterwards.
Flyer: Sep16flyer.pdf (Acrobat PDF)
Rock falls in California's Sierra Nevada: Pursuing explanations for exfoliation and seemingly spontaneous fracture of rock
by Brian D. Collins, USGS Research Civil Engineer, Landslide Hazards Program
- Exfoliation is a process by which layers of rock erode from the surface of landscapes
- In California's Sierra Nevada, exfoliation in steep granite cliffs is common, sometimes leading to potentially hazardous rock falls.
- New research sheds light on how, where and when rock falls may occur from exfoliation, and the effect daily heating cycles may have on exfoliation itself.
- Recent rock fall studies by the USGS and National Park Service provide sound basis for risk reduction actions in Yosemite National Park.
Flyer: Oct16flyer.pdf (Acrobat PDF)
Ecological Stressors: It's a Lot of 'WERC'
There is no place like California
by A. Keith Miles, USGS Center Director, Western Ecological Research Center
- Highlights of the science of the USGS Western Ecological Research Center
- Wildfire, drought, sea level rise
- Endangered species, species of concern
- Alternate energy, urbanization, species connectivity
Flyer: Nov16flyer.pdf (Acrobat PDF)
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