Featured Research

from universities, journals, and other organizations

Researchers Produce The First Direct 3-D Image Of A Volcanic System

Date:
August 14, 2000
Source:
Scripps Institution Of Oceanography -- University Of California, San Diego
Summary:
Until now, textbook depictions of the fiery magma chambers that reside beneath volcanoes and below the earth's crust were based on projected measurements, some guess work, and the artist's creative imagination. Scientists at Scripps Institution of Oceanography at the University of California, San Diego, have for the first time produced a direct three-dimensional image of a volcanic system based on sound waves reflected from a subterranean magma chamber.

Until now, textbook depictions of the fiery magma chambers that reside beneath volcanoes and below the earth's crust were based on projected measurements, some guess work, and the artist's creative imagination. Scientists at Scripps Institution of Oceanography at the University of California, San Diego, have for the first time produced a direct three-dimensional image of a volcanic system based on sound waves reflected from a subterranean magma chamber. An international research team used a two-mile long array of hydrophones, instruments used for listening to sound transmitted through water, to record sound signals reflected from a magma chamber residing one mile beneath the East Pacific Rise, a linear volcanic system some 600 miles southwest of Acapulco, Mexico.

"We were able to take bits and pieces of reflected sound energy and project them back onto the magma body, producing a direct 3-D image, which is much more detailed than those delivered using non-direct methods," said Graham Kent, an associate research geophysicist at the Cecil H. and Ida M. Green Institute of Geophysics and Planetary Physics at Scripps. "Our image is constructed from energy reflecting off of a thin tabular sheet of lava beneath the ridge crest in a manner analogous to a sonogram."

Results of the ARAD project (Anatomy of a Ridge-Axis Discontinuity) are described in the August 10 issue of the journal Nature.

The team's images reveal a large and complex magma chamber system beneath a section of the East Pacific Rise where the ridge is misaligned. These results contradict the current paradigm, which describes these complex features with little or no magma supply.

The authors argue that clear, three-dimensional depictions such as those constructed for the East Pacific Rise images will provide new insights into the geological processes of other volcanic systems worldwide. Such images are important for understanding the hidden processes inside a volcanic system's magma chamber, which may give further insight into volcanic activity and the composition of erupted lava flows.

These three-dimensional images of the mid-ocean ridge magma chamber benefited from Global Positioning System (GPS) navigation, which the researchers used to carefully plot their course across the East Pacific Rise. The three-dimensional images were constructed from some 120,000 sound records. The hydrophone instruments record "popping sounds" released from a series of air guns aimed at the crustal magma chambers.

###The paper's co-authors from Scripps include Alistair Harding and John Orcutt. Other co-authors include S.C. Singh, M.C. Sinha, P.J. Barton, R.S. White, S.K. Bazin, R.W. Hobbs, C.H. Tong, and J.W. Pye.

The ARAD seismic experiment is an international collaboration between investigators at Scripps and the University of Cambridge, United Kingdom, with financial support from the RIDGE program/National Science Foundation, British Institutions Reflection Profiling Syndicate (BIRPS), and the Natural Environment Research Council. Additional funds were provided by Scripps Institution and the Cecil H. and Ida M. Green Foundation for Earth Sciences.

Note to editors: 3-D movie available at: http://www.sio.ucsd.edu/scripps_news/pressreleases/3d-volcano_movies.html

Scripps Institution of Oceanography, a part of the University of California, San Diego, is one of the oldest, largest, and most important centers for global science research and graduate training in the world. In 1995, the National Research Council ranked Scripps Institution first in faculty quality among oceanography programs nationwide. The scientific scope of the institution has grown since its founding in 1903 to include biological, physical, chemical, geological, geophysical, and atmospheric studies of the earth as a system. More than 300 research programs are under way today in a wide range of scientific areas. The institution has a staff of about 1,200, and annual expenditures of approximately $100 million, from federal, state, and private sources. Scripps operates the largest academic fleet with four oceanographic research ships for worldwide exploration and one research platform.

Scripps Institution of Oceanography on the web: http://www.sio.ucsd.edu/


Story Source:

The above story is based on materials provided by Scripps Institution Of Oceanography -- University Of California, San Diego. Note: Materials may be edited for content and length.


Cite This Page:

Scripps Institution Of Oceanography -- University Of California, San Diego. "Researchers Produce The First Direct 3-D Image Of A Volcanic System." ScienceDaily. ScienceDaily, 14 August 2000. <www.sciencedaily.com/releases/2000/08/000810071957.htm>.
Scripps Institution Of Oceanography -- University Of California, San Diego. (2000, August 14). Researchers Produce The First Direct 3-D Image Of A Volcanic System. ScienceDaily. Retrieved August 27, 2014 from www.sciencedaily.com/releases/2000/08/000810071957.htm
Scripps Institution Of Oceanography -- University Of California, San Diego. "Researchers Produce The First Direct 3-D Image Of A Volcanic System." ScienceDaily. www.sciencedaily.com/releases/2000/08/000810071957.htm (accessed August 27, 2014).

Share This




More Earth & Climate News

Wednesday, August 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Calif. Quake Underscores Need for Early Warning

Calif. Quake Underscores Need for Early Warning

AP (Aug. 26, 2014) — Researchers at UC Berkeley are testing a prototype of an earthquake early warning system that California is pursuing years after places like Mexico and Japan already have them up and running. (August 26) Video provided by AP
Powered by NewsLook.com
Hurricane Marie Brings Big Waves to California Coast

Hurricane Marie Brings Big Waves to California Coast

Reuters - US Online Video (Aug. 26, 2014) — Huge waves generated by Hurricane Marie hit the Southern California coast. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Brazil Tries Genetically Modified Mosquitoes to Fight Dengue

Brazil Tries Genetically Modified Mosquitoes to Fight Dengue

AFP (Aug. 25, 2014) — A factory in the industrial state of Sao Paulo produces genetically modified mosquitoes to fight dengue, a deadly tropical disease more prevalent in Brazil than anywhere else in the world. Duration: 00:57 Video provided by AFP
Powered by NewsLook.com
Raw: Prime Minister at Japan Landslide Site

Raw: Prime Minister at Japan Landslide Site

AP (Aug. 25, 2014) — Japanese Prime Minister Shinzo Abe visited Hiroshima on Monday as rescuers expanded their search for dozens still missing from landslides around the western Japanese city that killed at least 50 people. (Aug. 25) 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