Taxonomy term

yosemite

Benchmarks: January 25, 1968: The last firefall: A Yosemite tradition flames out

Fifty years ago this month, on Jan. 25, 1968, a massive bonfire built of red fir bark atop Glacier Point in Yosemite National Park was burned down to embers and, promptly at 9 p.m., and for the last time, pushed over the cliff edge to create a flaming cascade for the viewing enjoyment of tourists gathered below. The spectacle, called “firefall,” had been a beloved Yosemite tradition for nearly a century.

25 Jan 2018

Down to Earth With: Yosemite's first park geologist Greg Stock

As a child growing up in the foothills of California’s Sierra Nevada Mountains, Greg Stock and his family took frequent trips to Yosemite National Park. One of his first memories is of hearing and seeing a giant rockfall tumble down the face of El Capitán. Today, Stock studies such rockfalls and how they impact safety in the area as the first park geologist employed at Yosemite. 
 
09 Feb 2016

Seismometers listen for falling rocks

Scores of natural rockfalls occur in California’s Yosemi­­te Valley every year, often with little or no advance warning, posing hazards to people and infrastructure. In 1980, for example, a fall near Yosemite Falls killed three people and injured 19. Efforts to record and document rockfalls are rudimentary, relying only on eyewitness accounts and after-the-fact observations of fresh talus piles, which means many events are likely going unreported. In a new study, however, researchers interested in whether there’s a better way to monitor these events propose that seismic and infrasound sensors can help keep tabs on the granite slabs dropping from Yosemite’s cliffs.
 
25 Aug 2015

Yosemite's cliffs in retreat

This past winter, two athletes grabbed the world’s attention as they climbed up the sheer walls of Yosemite National Park’s El Capitan. But some geologists are more concerned with what falls down these precipitous faces — namely, rocks. Park geologist Greg Stock has developed a history of rockfalls in Yosemite valley dating back 15,000 years, which reveals how its cliffs have crumbled since glaciers disappeared at the end of the last ice age.

 
11 May 2015

Bare Earth Elements: Rim Fire Roundup

The devasting Rim Fire has been torching a growing patch of California for the last week and a half. The latest update from Cal Fire reports that the fire has burned about 726 square kilometers (~179,000 acres), currently making it the 7th largest fire by burn area in the state's history. EARTH offers a roundup of sites where official information can be found, as well as some of the many recent news reports covering the fire.

27 Aug 2013