Featured Research

from universities, journals, and other organizations

Global Seismic Network Now Extends To The Deep Oceans -- Ocean Drilling Program's New Technology To Open Exploration Of Earth's Interiors

Date:
May 4, 1998
Source:
National Science Foundation
Summary:
Scientists with the Ocean Drilling Program (ODP) are now installing one of many planned Geophysical Ocean Bottom Observatories (GOBO), in which a permanent seismograph station will be established on the sea floor for monitoring earthquake activity. ODP is funded in large part by the National Science Foundation (NSF).

Scientists with the Ocean Drilling Program (ODP) are now installing one of many planned Geophysical Ocean Bottom Observatories (GOBO), in which a permanent seismograph station will be established on the sea floor for monitoring earthquake activity. ODP is funded in large part by the National Science Foundation (NSF).

"Installing a seismic station in an ocean basin will be like filling in missing portions of a mirror or lens in a telescope," says Bruce Malfait, director of ODP at NSF. "It will allow us to examine regions of the earth's interior that are only poorly imaged at present by stations on a few islands, or the 30% of the earth's surface occupied by continents."

The global network of on-land seismic stations provides sufficient earthquake monitoring capabilities for large parts of the earth's surface in continental regions and on some islands. However, oceanic regions that cover approximately 70 percent of the earth's surface remain largely unmonitored, creating large "holes" in worldwide data coverage for low magnitude earthquakes and for earth's deep interior.

Scientists aboard the research vessel JOIDES Resolution will drill into the oceanic basement of the Indian Ocean, a region of the world where there is a lack of ocean-bottom seismograph stations. The expedition, referred to as ODP Leg 179, began when the ship departed Cape Town, South Africa, on April 21. It concludes with a port call in Darwin, Australia, on June 6.

"During the past 10 years our knowledge of deep earth interior processes has greatly improved with the development of new generations of global seismic monitoring networks," says John Casey of the University of Houston, co-chief scientist for the expedition. "The need for ocean-bottom observatories is driven by the lack of observations in large tracts of the world ocean where neither continents nor islands are available to place observatories."

Before laying the groundwork for the new seismic observatory, ODP will test a new drilling system designed to drill large-diameter casing into hard fractured rock on the sea floor. The new drilling system, called water hammer drilling, uses a percussion drill similar to a jackhammer but is driven by fluid rather than air. If the tests are successful, reentry systems will be placed on the boreholes, allowing scientists to return to these locations to conduct future experiments.


Story Source:

The above story is based on materials provided by National Science Foundation. Note: Materials may be edited for content and length.


Cite This Page:

National Science Foundation. "Global Seismic Network Now Extends To The Deep Oceans -- Ocean Drilling Program's New Technology To Open Exploration Of Earth's Interiors." ScienceDaily. ScienceDaily, 4 May 1998. <www.sciencedaily.com/releases/1998/05/980504125635.htm>.
National Science Foundation. (1998, May 4). Global Seismic Network Now Extends To The Deep Oceans -- Ocean Drilling Program's New Technology To Open Exploration Of Earth's Interiors. ScienceDaily. Retrieved September 22, 2014 from www.sciencedaily.com/releases/1998/05/980504125635.htm
National Science Foundation. "Global Seismic Network Now Extends To The Deep Oceans -- Ocean Drilling Program's New Technology To Open Exploration Of Earth's Interiors." ScienceDaily. www.sciencedaily.com/releases/1998/05/980504125635.htm (accessed September 22, 2014).

Share This



More Earth & Climate News

Monday, September 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Hundreds of Thousands Hit NYC Streets to Protest Climate Change

Hundreds of Thousands Hit NYC Streets to Protest Climate Change

AFP (Sep. 22, 2014) Celebrities, political leaders and the masses rallied in New York and across the globe demanding urgent action on climate change, with organizers saying 600,000 people hit the streets. Duration: 01:19 Video provided by AFP
Powered by NewsLook.com
Inside London's Massive Sewer Tunnel Project

Inside London's Massive Sewer Tunnel Project

AP (Sep. 22, 2014) Billions of dollars are being spent on a massive super sewer to take away London's vast output of waste, which is endangering the River Thames. (Sept. 22) Video provided by AP
Powered by NewsLook.com
Washed-Up 'Alien Hairballs' Are Actually Algae

Washed-Up 'Alien Hairballs' Are Actually Algae

Newsy (Sep. 22, 2014) Green balls of algae washed up on Sydney, Australia's Dee Why Beach. Video provided by Newsy
Powered by NewsLook.com
Was The Biggest Climate March In History Underreported?

Was The Biggest Climate March In History Underreported?

Newsy (Sep. 22, 2014) The People's Climate March in New York City drew more than 300,000 people, possibly a record-breaking number. Was the march underreported? Video provided by Newsy
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