Featured Research

from universities, journals, and other organizations

Seismometer Able To Measure Earth Tremors Over Longer Periods Is Unveiled

Date:
November 24, 2008
Source:
Plataforma SINC
Summary:
Researchers have developed an ocean bed seismometer that operates using a data acquisition and storage system based on CompactFlash memory cards such as those used in commercial digital cameras. The machine’s low energy consumption means it can operate independently for two months at depths of up to 6,000 metres.

OBS developed by the UPC and CSIC.
Credit: UPC

Researchers from the Polytechnic University of Catalonia (UPC) and the Spanish Council for Scientific Research (CSIC) have developed an ocean bed seismometer that operates using a data acquisition and storage system based on CompactFlash memory cards such as those used in commercial digital cameras. The machine’s low energy consumption means it can operate independently for two months at depths of up to 6,000 metres.

A group of researchers has presented the new ocean bottom seismometer (OBS) in the magazine IEEE Transactions on instrumentation and measurement. Thanks to its low consumption batteries, the machine can monitor earth tremors using passive seismic techniques for long continuous periods in the ocean depths.

“Until not long ago, OBS were only able to operate independently for periods of 15 days or a month, but this model can carry on collecting data for up to two months,” Shahram Shariat Panahi, one of the report’s authors and a scientist at the UPC’s Department of Electronic Engineering, told SINC.

The seismometer has already been trialled in the waters off Tarragona and Vigo at depths of 1,000 metres, but it is able to withstand pressures in ocean trenches up to 6,000 metres below the surface. During the trials, 20 teams worked in the area to gather information about the thickness of each layer in the ocean floor and the materials from which these were made, down to a depth of 40 kilometres.

The potential of passive seismics

A compressed air cannon is used to periodically simulate small artificial tremors in the form of acoustic waves that are reflected and refracted within the different layers of the sea bed, and are then picked up by the OBS’ sensors. The seismometer converts the analogical signal into digital data, which are stored on memory cards.

The seismometer also performs well because of its small size, low weight, low electronic noise levels, and the use of CompactFlash memory cards similar to commercial ones that act like hard discs, and can store up to 56 GB of information.

The researchers are currently developing 10 more OBS, which they hope will permit even longer independent functioning of up to six months. This project, which will involve new tests around the Spanish coast, will last for two years and will use the new design during seismic refraction campaigns on the sea bed.


Story Source:

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


Journal Reference:

  1. Panahi et al. A Low Power Datalogger based on Compactflash memory for Ocean Bottom Seismometers (OBS). 2005 IEEE Instrumentationand Measurement Technology Conference Proceedings, 2005; 21278 DOI: 10.1109/IMTC.2005.1604353

Cite This Page:

Plataforma SINC. "Seismometer Able To Measure Earth Tremors Over Longer Periods Is Unveiled." ScienceDaily. ScienceDaily, 24 November 2008. <www.sciencedaily.com/releases/2008/11/081113101426.htm>.
Plataforma SINC. (2008, November 24). Seismometer Able To Measure Earth Tremors Over Longer Periods Is Unveiled. ScienceDaily. Retrieved October 1, 2014 from www.sciencedaily.com/releases/2008/11/081113101426.htm
Plataforma SINC. "Seismometer Able To Measure Earth Tremors Over Longer Periods Is Unveiled." ScienceDaily. www.sciencedaily.com/releases/2008/11/081113101426.htm (accessed October 1, 2014).

Share This



More Earth & Climate News

Wednesday, October 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Earth Has Lost Half Its Vertebrate Wildlife Since 1970: WWF

Earth Has Lost Half Its Vertebrate Wildlife Since 1970: WWF

Newsy (Sep. 30, 2014) A new study published by the World Wide Fund for Nature found that more than half of the world's wildlife population has declined since 1970. Video provided by Newsy
Powered by NewsLook.com
Seismic Activity Halts Recovery at Japan Volcano

Seismic Activity Halts Recovery at Japan Volcano

AP (Sep. 30, 2014) Rescuers were forced to suspend plans to recover at least two dozen bodies from near the summit of Mount Ontake in central Japan on Tuesday after increased seismic activity raised concern about the possibility of another eruption. (Sept. 30) Video provided by AP
Powered by NewsLook.com
Dolphins Might Use Earth's Magnetic Field As A GPS

Dolphins Might Use Earth's Magnetic Field As A GPS

Newsy (Sep. 30, 2014) A study released Monday suggests dolphins might be able to sense the Earth's magnetic field and possibly use it as a means of navigation. Video provided by Newsy
Powered by NewsLook.com
How To Battle Stink Bug Season

How To Battle Stink Bug Season

Newsy (Sep. 30, 2014) Homeowners in 33 states grapple with stink bugs moving indoors at this time of year. Here are a few tips to avoid stink bug infestations. 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:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

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