6.0 Quake Hits San Francisco Bay Area
A 6.0 earthquake hit east Napa Valley at 3:20 local time in the San Francisco Bay area. It’s the largest quake to hit the Bay Area since the 1989 Loma Prieta quake struck during the World Series. Injuries and property damage reported along with widespread power outages.
— NBC Bay Area (@nbcbayarea) August 24, 2014
From San Jose Mercury News:
The slow rumble was reported at 3:20 a.m. and was centered close to Buchli Station Road, near American Canyon in Napa County, and was about 6.7 miles deep, according to the U.S. Geological Survey.
An estimated 2.3 million people spanning 100 miles from the Santa Cruz area to Wine Country were affected by the quake — with several thousand people quickly reporting that they had felt the rumble, the USGS reported.
More than 20 aftershocks were reported, topping out at magnitude 3.6.
According to initial USGS data, it was categorized as “severe” in how the shaking was perceived, though user-reported data deemed it on a lower degree, as “strong.” The earthquake was initially reported as having a 6.1 magnitude before being quickly downgraded to 6.0.
An earthquake of Sunday’s size, while large, is not uncommon to the area historically, said David Schwartz, an earthquake geologist with the USGS office in Menlo Park. He noted that since 1969, earthquakes in the range of a 6 pop up every few years: a pair of 5.7 and 5.8 in Santa Rosa in 1969, a 5.8 and 5.9 duo in Livermore in 1980, and a 6.2 in Morgan Hill in 1984.
A lot of broken wine bottles:
— David R. Duncan (@DavidSilverOak) August 24, 2014
On the other hand the Iceland’s Bardarbunga volcano alert was downgraded from red to orange.
Here is a geologic map of the north bay with the earthquake location (modified from Wagner et al., 2011) pic.twitter.com/VXV2DswhwK
— Nick Swanson-Hysell (@polarwander) August 24, 2014
According to Cal Poly geologist Jascha Polet “Napa quake aftershocks appear to line up along NW striking plane, so based on focal mechanism right lateral strike slip motion (no surprise).”
Oh god. What if we all die in an earthquake and the only people left to rebuild are the ones who went to Burning Man? #terrifying
— daisy barringer (@daisy) August 24, 2014
USGS Earthquake Page for the East Napa Quake