Featured Research

from universities, journals, and other organizations

Stock Market Swings Help Researchers Understand Extreme Events In Solar Wind

Date:
July 26, 2002
Source:
University Of Warwick
Summary:
Astrophysicists at the University of Warwick have applied data analysis methods used to model stock market fluctuations, to explore changes in the solar wind (the sun's expanding atmosphere). They have discovered that the fluctuations in the solar wind follow the same kinds of patterns seen in the stock markets – particularly when it comes to the number of extreme events or large fluctuations.

Astrophysicists at the University of Warwick have applied data analysis methods used to model stock market fluctuations, to explore changes in the solar wind (the sun's expanding atmosphere). They have discovered that the fluctuations in the solar wind follow the same kinds of patterns seen in the stock markets – particularly when it comes to the number of extreme events or large fluctuations.

The researchers led by Professor Sandra Chapman at the University of Warwick, used "finite size scaling" to look at the probability of fluctuations or jumps in magnetic energy density in the solar wind, using data from the NASA-WIND spacecraft. They found that the solar wind fluctuations had a much higher probability of extreme events than for more familiar random processes (which follow a Gaussian or bell shaped curve). In fact statistically, the solar wind fluctuations are similar to those found previously for fluctuations in stock market indices. Large fluctuations in the solar wind affect our local 'space weather'. Predicting these is as challenging as predicting large changes in stock prices. As this work suggests that the underlying mathematics is similar we can apply knowledge from one area to understand the other.

The researchers also found that the magnetic energy density fluctuations were self-similar (in that the pattern of variations looked very similar at all time scales up to a period of 20 hours or so – in the same way that a fractal image tends to show very similar properties or patterns when you look at it on different scales). The team members are using their new analysis to modify current turbulence theories to produce more useful mathematical models of the occurrence of extreme events in the solar wind. The research team's first paper is entitled "B. Hnat, S.C. Chapman, G. Rowlands, N.W. Watkins and W. M. Farrell, Finite size in the solar wind magnetic field energy density as seen by WIND, Geophys. Res. Lett., 29, 86-1, (2002). The authors are from the University of Warwick, the British Antarctic Survey (BAS) and NASA Goddard Space Flight Center.

The University of Warwick analysis was supported at the Warwick end by the Particle Physics and Astronomy Research Council, and at BAS by the Natural Environment Research Council.


Story Source:

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


Cite This Page:

University Of Warwick. "Stock Market Swings Help Researchers Understand Extreme Events In Solar Wind." ScienceDaily. ScienceDaily, 26 July 2002. <www.sciencedaily.com/releases/2002/07/020726081058.htm>.
University Of Warwick. (2002, July 26). Stock Market Swings Help Researchers Understand Extreme Events In Solar Wind. ScienceDaily. Retrieved October 20, 2014 from www.sciencedaily.com/releases/2002/07/020726081058.htm
University Of Warwick. "Stock Market Swings Help Researchers Understand Extreme Events In Solar Wind." ScienceDaily. www.sciencedaily.com/releases/2002/07/020726081058.htm (accessed October 20, 2014).

Share This



More Space & Time News

Monday, October 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Comet Siding Spring Grazes Mars' Atmosphere

Comet Siding Spring Grazes Mars' Atmosphere

Newsy (Oct. 19, 2014) A comet from the farthest reaches of the solar system passed extremely close to Mars this weekend, giving astronomers a rare opportunity to study it. Video provided by Newsy
Powered by NewsLook.com
Latin America Launches Communications Satellite

Latin America Launches Communications Satellite

AFP (Oct. 17, 2014) Argentina launches a home-built satellite, a first for Latin America. It will ride a French-made Ariane 5 rocket into orbit, and will provide cell phone, digital TV, Internet and data services to the lower half of South America. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com
This Week @ NASA, October 17, 2014

This Week @ NASA, October 17, 2014

NASA (Oct. 17, 2014) Power spacewalk, MAVEN’s “First Light”, Hubble finds extremely distant galaxy and more... Video provided by NASA
Powered by NewsLook.com
Saturn's 'Death Star' Moon Might Have A Hidden Ocean

Saturn's 'Death Star' Moon Might Have A Hidden Ocean

Newsy (Oct. 17, 2014) The smallest of Saturn's main moons, Mimas, wobbles as it orbits. Research reveals it might be due to a global ocean underneath its icy surface. 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


Space & Time

Matter & Energy

Computers & Math

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