Featured Research

from universities, journals, and other organizations

Deep-diving West Coast Plate May Have Triggered Massive Central U.S. Quake

Date:
March 29, 2007
Source:
American Geophysical Union
Summary:
Scientists studying extraordinary earthquakes in the central U.S. in 1811-12 along the New Madrid seismic zone have revealed a possible new driving mechanism for intraplate seismicity.

Scientists studying extraordinary earthquakes in the central U.S. in 1811-12 along the New Madrid seismic zone have revealed a possible new driving mechanism for intraplate seismicity.

The earthquakes were unprecedented in the historical record within stable continental plate interiors.

Forte et al. analyze viscous flow models of the mantle based on high-resolution seismic tomography. They find that remnants of the ancient Farallon plate, a slab of crust swallowed beneath the western North American continental margin nearly 70 million years ago, continue to descend into the deep mantle under central North America.

The descent induces mantle flow towards the Earth’s deep interior directly below the New Madrid seismic zone. That flow, in turn, may strain the overlying crust, causing seismic ruptures, the authors hypothesize. Their results may shed light on present-day seismic hazards in the central Mississippi River Valley.

Title: Descent of the ancient Farallon slab drives localized mantle flow below the New Madrid seismic zone

Authors: A. M. Forte and R. Moucha: Départment des Sciences de la Terre et de l’Atmosphère, Centre de Recherche en Géochimie et en Géodynamique, Université du Québec à Montréal, Montréal, Quebec, Canada; J. X. Mitrovica: Department of Physics, University of Toronto, Toronto, Ontario, Canada; N. A. Simmons and S. P. Grand: Jackson School of Geological Sciences, University of Texas at Austin, Austin, Texas, U.S.A.

Source: Geophysical Research Letters (GRL) paper 10.1029/2006GL027895, 2007


Story Source:

The above story is based on materials provided by American Geophysical Union. Note: Materials may be edited for content and length.


Cite This Page:

American Geophysical Union. "Deep-diving West Coast Plate May Have Triggered Massive Central U.S. Quake." ScienceDaily. ScienceDaily, 29 March 2007. <www.sciencedaily.com/releases/2007/03/070322105814.htm>.
American Geophysical Union. (2007, March 29). Deep-diving West Coast Plate May Have Triggered Massive Central U.S. Quake. ScienceDaily. Retrieved August 20, 2014 from www.sciencedaily.com/releases/2007/03/070322105814.htm
American Geophysical Union. "Deep-diving West Coast Plate May Have Triggered Massive Central U.S. Quake." ScienceDaily. www.sciencedaily.com/releases/2007/03/070322105814.htm (accessed August 20, 2014).

Share This




More Earth & Climate News

Wednesday, August 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Unsustainable Elephant Poaching Killed 100K In 3 Years

Unsustainable Elephant Poaching Killed 100K In 3 Years

Newsy (Aug. 20, 2014) — Poachers have killed 100,000 elephants between 2010 and 2012, as the booming ivory trade takes its toll on the animals in Africa. Video provided by Newsy
Powered by NewsLook.com
Charter Schools Alter Post-Katrina Landscape

Charter Schools Alter Post-Katrina Landscape

AP (Aug. 20, 2014) — Nine years after Hurricane Katrina, charter schools are the new reality of public education in New Orleans. The state of Louisiana took over most of the city's public schools after the killer storm in 2005. (Aug. 20) Video provided by AP
Powered by NewsLook.com
Green Power Blooms as Japan Unveils 'hydrangea Solar Cell'

Green Power Blooms as Japan Unveils 'hydrangea Solar Cell'

AFP (Aug. 19, 2014) — A solar cell that resembles a flower is offering a new take on green energy in Japan, where one scientist is searching for renewables that look good. Duration: 01:29 Video provided by AFP
Powered by NewsLook.com
Disquieting Times for Malaysia's 'fish Listeners'

Disquieting Times for Malaysia's 'fish Listeners'

AFP (Aug. 19, 2014) — Malaysia's last "fish listeners" -- practitioners of a dying local art of listening underwater to locate their quarry -- try to keep the ancient technique alive in the face of industrial trawling and the depletion of stocks. Duration: 02:29 Video provided by AFP
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