HOME >> BIOLOGY >> NEWS
AGU Journal Highlights -- April 16, 2007

1. Earthquake-induced gravity field changes slowly recover to initial conditions

Earthquakes can modify the Earth's gravity field by deforming the Earth's layers and by changing the density of rocks through dilation and compression of crust and mantle material. Such changes were detected after the 2004 Sumatra-Andaman earthquake by the Gravity Recovery and Climate Experiment (GRACE) satellite, which has previously been used to monitor dynamics such as changes in ground water storage on land masses, exchanges between ice sheets or glaciers and the oceans, and fluctuations in ocean currents. Ogawa and Heki studied GRACE data following this earthquake and found signatures of extensive post-seismic creep along the main rupture. The authors also saw evidence for slow recovery of gravity field changes, possibly induced by simultaneous diffusion of mantle water while post-seismic slip occurs. They expect that such a self-healing system of earthquake-induced gravity changes, which introduces a new role of water in the mantle, would significantly reduce the amount of permanent shifts of the Earth's rotation axis by earthquakes.

Title: Slow Postseismic Recovery of Geoid Depression Formed by the 2004 Sumatra-Andaman Earthquake by Mantle Water Diffusion

Authors: Ryoko Ogawa: Division of Earth and Planetary Science, Graduate School of Science, Hokkaido University, Sapporo, Japan;
Kosuke Heki: Department of Natural History Science, Faculty of Science, Hokkaido University, Sapporo, Japan

Source: Geophysical Research Letters (GRL) paper 10.1029/2007GL029340, 2007


2. Recent trends in Arctic Ocean mass distribution

Satellite-detected declines in salinity and bottom pressure in parts of the Arctic Ocean indicate that a reversal of the polar oceans circulation may be under way. The spatial distribution and magnitude of these trends suggest a shift from a clockwise to a counterclockwise pattern
'"/>

Contact: Peter Weiss
pweiss@agu.org
202-777-7507
American Geophysical Union
16-Apr-2007


Page: 1 2 3 4 5 6 7 8

Related biology news :

1. News tips from the Journal of Neuroscience
2. News tips from the Journal of Neuroscience
3. News tips from the Journal of Neuroscience
4. News tips from the Journal of Neuroscience
5. Tips from the Journals of the American Society for Microbiology
6. Journalists can register now for ECCO 14 -- the European Cancer Conference
7. Journal of Alzheimers Disease achieves significant impact factor
8. News tips from the Journal of Neuroscience
9. Highlights from the July 2007 Journal of the American Dietetic Association
10. News tips from the Journal of Neuroscience
11. Journal of Nuclear Medicines impact grows, remains consistently high over past 5 years

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:9/12/2018)... ... September 10, 2018 , ... IONpathTM, a venture-backed commercial-stage ... Multiplexed Ion Beam Imaging (MIBITM) technology was accepted by the journal Cell and ... shared during a webinar presented by Dr. Mike Angelo on October 2nd, 2018. ...
(Date:9/7/2018)... ... September 06, 2018 , ... Sensors Midwest ... to show Sensors Expo & Conference , announces their partnership with Fraunhofer ... conduct an IoT Enabled Industrial IoT Certification Program. Taking place on October 17, ...
(Date:8/31/2018)... , ... August 30, 2018 , ... ... residence times as a component of drug discovery programs. Longer-target engagement can result ... times are low throughput, require expensive instrumentation, or require the alteration of the ...
Breaking Biology News(10 mins):
(Date:8/26/2018)... ... August 24, 2018 , ... ExoCoBio Inc., based in South ... dermatitis and inhibits a variety of inflammatory targets in the journal of Stem ... mice having severe atopic dermatitis were significantly improved after administration of stem cell-derived ...
(Date:8/21/2018)... ... 21, 2018 , ... The Connecticut Technology Council (CTC) and Marcum LLP today ... technology companies in Connecticut. This year’s group of top-ranked companies will be honored at ... Connecticut Convention Center in Hartford. A complete list of the Marcum Tech Top 40 ...
(Date:8/17/2018)... VANCOUVER, British Columbia (PRWEB) , ... August 17, ... ... - The International Society for Biological and Environmental Repositories (ISBER) is pleased to ... Fourth Edition. , The Fourth Edition publication, originally released in January 2018, is ...
(Date:8/11/2018)... ... August 10, 2018 , ... Researchers performing pressurized NMR or EPR ... Explosion Protection Chamber for High-Pressure NMR & EPR by Wilmad-LabGlass – SP ... the laboratory. , High-pressure experiments have significantly grown in popularity over the last ...
Breaking Biology Technology:
Cached News: