New Paper from NGL! Drought-Triggered Inflation and Earthquakes at Long Valley Caldera

Drought‐triggered magmatic inflation, crustal strain and seismicity near the Long Valley Caldera, Central Walker Lane
by W.C. Hammond, C. Kreemer, I. Zaliapin, and G. Blewitt

First published: 24 May 2019 (JGR Solid Earth)

[May 24, 2019] New Paper! Drought-Triggered Inflation and Earthquakes at Long Valley Caldera

“In a new study we have explored how recent drought periods in California influence the timing of Long Valley active caldera inflation near the city of Mammoth, California. The study uses GPS and seismic data to show how uplift of the Sierra Nevada and magmatic inflation at Long Valley accelerated when the drought initiated in late 2011. The subsequent inflation changed the distribution of active tectonic strain rates in the adjacent central Walker Lane, east of the Sierra Nevada, effecting seismicity rates. Earthquakes occurred more frequently in places where the geodetic strain rates increased, suggesting that hydrological surface loading (e.g. from changing levels of aquifers, snow and lakes) affects the magmatic system in ways that subsequently influence earthquake occurrence. The study captures in new detail the complex links between climate, active volcanoes and earthquakes in eastern California and Nevada.

The work is a collaboration between the Nevada Bureau of Mines and Geology and Department of Mathematics and Statistics in the UNR College of Science. The study appears as a new accepted article in the Journal of Geophysical Research – Solid Earth.”

UNR Arboretum “Tree Talk” Series—April 25:

Charlie TruettnerTrees, Drought, and Climate Change in the American Southwest
Tuesday, April 25, 7:00 PM, William Raggio Building, Room 2003
Parking at UNR
Sponsored by the Arboretum Board at UNR

Charlie’s talk will combine science and story centered on his experiences as a graduate student and professional in the deserts of the American Southwest.  Conifers located on top of desert sky islands have and are experiencing mortality events like no other in modern history.  Through the use of dendrochronological and paleoecological methods, Charlie interprets trends of conifer tree species from the past to help understand projected vegetation change over the 21st century.

Charlie is a PhD student in Dr. Franco Biondi’s DendroLab and the Geography Department at UNR.  He received his M.Sc. in Quaternary Science at Northern Arizona University, and he has worked for or collaborated with the National Park Service, United States Geological Survey, Merriam-Powell Center for Environmental Research, National Science Foundation, and many other academic institutions in the American Southwest.

For more information, please contact:
Cheryll Glotfelty
Professor and UNR Arboretum Board Chair