Free Newsletters - Space - Defense - Environment - Energy - Solar - Nuclear
..
. Earth Science News .




SHAKE AND BLOW
Hoodoos - key to earthquakes?
by Staff Writers
Los Angeles CA (SPX) Feb 08, 2013


Hoodoos can be found in desert regions and are highly susceptible to erosion that makes their age uncertain.

In the absence of long-term instrumental data, fragile rock formations, called hoodoos, may be key to understanding seismic hazard risk. In this study, researchers consider two hoodoos in Red Rock Canyon region to put limits on expected intensity of ground motion from earthquakes along the Garlock fault.

Hoodoos can be found in desert regions and are highly susceptible to erosion that makes their age uncertain. Despite that uncertainty, existing unfractured hoodoos, tall spires of sedimentary rock, may help put limits on ground motion associated with recent events by understanding the minimal force necessary to break the shafts made primarily of relatively soft sandstone.

The Garlock fault region features an active strike-slip fault. Anooshehpoor, et al., estimated the tensile strength of two hoodoos and considered previously published physical evidence of fault offsets that suggest at least one large earthquake, resulting in seven meters (23 feet) of slip, in the last 550 years. And yet, the hoodoos are still intact, suggesting median or low level of ground motion associated with the large quakes in this region.

While the age of the hoodoos cannot be exactly ascertained, the authors argue that these rocks can still serve as a valuable tool in constraining ground motion and thus contribute to the development of probabilistic seismic hazard assessments in the area.

"Constraints on Ground Accelerations Inferred from Unfractued Hoodoos near the Garlock Fault, California," BSSA 103:1; Rasool Anooshehpoor, U.S. Nuclear Regulatory Commission; James N. Brune, Jaak Daemen and Matthew D. Purvance of University of Nevada, Reno.

.


Related Links
Seismological Society of America
Bringing Order To A World Of Disasters
When the Earth Quakes
A world of storm and tempest






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





SHAKE AND BLOW
Osaka Basin map: Identifies high-rise buildings at risk from quakes
Los Angeles CA (SPX) Feb 06, 2013
The Osaka Basin, Japan is home to many high-rise buildings that sit atop its thick soft sediments, vulnerable to long-period strong ground motions that last minutes. A new map created by Japanese researchers is intended to guide engineers and city planners in new construction and identifies existing buildings with the potential of resonance vibration. The Osaka Basin in western Japan is su ... read more


SHAKE AND BLOW
Smartphones, tablets help UW researchers improve storm forecasts

Rescuers struggle to aid Solomons quake victims

HDT Global Awarded Guardian Angel Air-Deployable Rescue Vehicle Contract

Sri Lanka rescues 138 stranded on sinking boat: navy

SHAKE AND BLOW
Light-emitting triangles may have applications in optical technology

Largest prime number to date found

South Korean Satellite Makes First Contact with Ground

Novel materials shake ship scum

SHAKE AND BLOW
Pacific Locked in 'La Nada' Limbo

Tortugas marine reserve yields more, larger fish

Malaysian state scales back Borneo dam plans

Water supplies in war-hit Syria cut by a third: UN

SHAKE AND BLOW
Polar bear researchers urge governments to act now and save the species

Cyclone did not cause 2012 record low for Arctic sea ice

NSF-funded Team Samples Antarctic Lake Beneath the Ice Sheet

Norway's ruling party may back Arctic islands oil drive

SHAKE AND BLOW
Investors who trample land rights risk bottom line: experts

Ethiopians 'driven out in land grabs'

How plant communities endure stress

Chocolate not yet China's cup of tea

SHAKE AND BLOW
Hoodoos - key to earthquakes?

Aftershocks stall aid efforts in tsunami-hit Solomons

Rescuers bid to reach tsunami-hit villages in Solomons

Heavy rain kills 34 in Pakistan: officials

SHAKE AND BLOW
Ghana extradites ex-military chief to I. Coast: security

Sudan president in Eritrea after Asmara mutiny: reports

Central African rebels warn president over peace deal

DR Congo peace deal signing cancelled: UN

SHAKE AND BLOW
Finding the way to memory

New Geology study raises questions about long-held theories of human evolution

3D printing breakthrough with human embryonic stem cells

Alternate walking and running to save energy, maintain endurance




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement