Featured Research

from universities, journals, and other organizations

Earthquake risk: Two faults exposed in eastern Sierra Nevada

Date:
September 28, 2011
Source:
Seismological Society of America
Summary:
Excavated trenches reveal two faults that bound the eastern flank of the Sierra Nevada in Antelope Valley, California and the Carson Range in Reno, Nevada; a new model changes predictions of amplified ground motion in Seattle basin.

Excavated trenches reveal two faults that bound the eastern flank of the Sierra Nevada in Antelope Valley, California and the Carson Range in Reno, Nevada. Observations by researchers at University of Nevada, Reno, suggest new details about the active faulting of the area.

Fault scarps that vertically offset young alluvial fan deposits along the Antelope Valley fault suggest the most recent surface rupture was at least 14 miles (23 km) long. Radiocarbon dating of bulk soil samples suggests the most recent earthquake occurred approximately 1350 years ago and the penultimate earthquake almost 5000 years earlier (or

6250 years before present day). The trench along the Carson Range provides insufficient data to quantify an earthquake event history, though large offsets appear to happen infrequently. The fault dips at a very low angle, which could have significant meaning for the behavior of the fault and the severity of related ground motion.

The article, "Paleoseismic Trenches across the Sierra Nevada and Carson Range Fronts in Antelope Valley, California and Reno, Nevada," is authored by Alexandra Sarmiento, Steven Wesnousky and Jayne Bormann of University of Nevada, Reno.


Story Source:

The above story is based on materials provided by Seismological Society of America. Note: Materials may be edited for content and length.


Cite This Page:

Seismological Society of America. "Earthquake risk: Two faults exposed in eastern Sierra Nevada." ScienceDaily. ScienceDaily, 28 September 2011. <www.sciencedaily.com/releases/2011/09/110928142441.htm>.
Seismological Society of America. (2011, September 28). Earthquake risk: Two faults exposed in eastern Sierra Nevada. ScienceDaily. Retrieved July 24, 2014 from www.sciencedaily.com/releases/2011/09/110928142441.htm
Seismological Society of America. "Earthquake risk: Two faults exposed in eastern Sierra Nevada." ScienceDaily. www.sciencedaily.com/releases/2011/09/110928142441.htm (accessed July 24, 2014).

Share This




More Earth & Climate News

Thursday, July 24, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Creative Makeovers for Ugly Cellphone Towers

Creative Makeovers for Ugly Cellphone Towers

AP (July 24, 2014) Mobile phone companies and communities across the country are going to new lengths to disguise those unsightly cellphone towers. From a church bell tower to a flagpole, even a pencil, some towers are trying to make a point. (July 24) Video provided by AP
Powered by NewsLook.com
Observation Boat to Protect Cetaceans During Ship Transfer

Observation Boat to Protect Cetaceans During Ship Transfer

AFP (July 22, 2014) As part of the 14-ship convoy that will accompany the Costa Concordia from the port of Giglio to the port of Genoa, there will be a boat carrying experts to look out for dolphins and whales from crossing the path of the Concordia. Duration: 01:02 Video provided by AFP
Powered by NewsLook.com
New Orleans Plans to Recycle Cigarette Butts

New Orleans Plans to Recycle Cigarette Butts

AP (July 21, 2014) New Orleans is the first U.S. city to participate in a large-scale recycling effort for cigarette butts. The city is rolling out dozens of containers for smokers to use when they discard their butts. (July 21) Video provided by AP
Powered by NewsLook.com
Shark Sightings a Big Catch for Cape Tourism

Shark Sightings a Big Catch for Cape Tourism

AP (July 21, 2014) A rise in shark sightings along the shores of Chatham, Massachusetts is driving a surge of eager vacationers to the beach town looking to catch a glimpse of a great white. (July 21) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins