Featured Research

from universities, journals, and other organizations

Enormous X-ray Solar Flare Seen By SOHO

Date:
October 29, 2003
Source:
European Space Agency
Summary:
The third most powerful solar X-ray flare on record, a remarkable X17.2 category explosion, erupted from sunspot 10486 on Tuesday, 28 October 2003. This is the second largest X-ray flare ever seen by the ESA/NASA SOHO spacecraft, after the major X20 solar flare of April 2001. Regular observations of X-ray flares began in the 1970s.

The third most powerful solar X-ray flare on record, a remarkable X17.2 category explosion, erupted from sunspot 10486 on Tuesday, 28 October 2003. This is the second largest X-ray flare ever seen by the ESA/NASA SOHO spacecraft, after the major X20 solar flare of April 2001. Regular observations of X-ray flares began in the 1970s. This explosion hurled a ‘coronal mass ejection’ (CME) almost directly toward Earth, which could trigger bright aurorae when the material reaches us in about a day. The Earth was immediately affected by intense X-ray radiation, which ionised the upper layers of the atmosphere, causing serious disruption to radio communications. The high-energy particles that followed (called a 'proton storm') could upset satellites by interfering with their electronics systems and damaging exposed components. During these storms, astronauts are advised to reduce exposure, particularly during spacewalks.

Related Articles


Our atmosphere protects people on the Earth, but passengers and crews on commercial jets at high latitudes could receive exposure equivalent to a normal medical chest X-ray. The CME associated with this flare is larger than the Sun itself and is one of the most dramatic halo CMEs ever recorded by SOHO. The material ejected by this CME is travelling towards Earth at 2145 kilometres per second (7.5 million km/h), as compared to a ‘normal’ speed for these events of 400 kilometres per second (1.5 million km/h). This is a very fast one! This image is from SOHO's LASCO coronagraph, a telescope that uses a disc to block the Sun's bright surface, revealing the faint solar corona, stars, planets and ‘sungrazing’ comets. In other words, a coronagraph produces an artificial solar eclipse.


Story Source:

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


Cite This Page:

European Space Agency. "Enormous X-ray Solar Flare Seen By SOHO." ScienceDaily. ScienceDaily, 29 October 2003. <www.sciencedaily.com/releases/2003/10/031029064622.htm>.
European Space Agency. (2003, October 29). Enormous X-ray Solar Flare Seen By SOHO. ScienceDaily. Retrieved March 29, 2015 from www.sciencedaily.com/releases/2003/10/031029064622.htm
European Space Agency. "Enormous X-ray Solar Flare Seen By SOHO." ScienceDaily. www.sciencedaily.com/releases/2003/10/031029064622.htm (accessed March 29, 2015).

Share This


More From ScienceDaily



More Space & Time News

Sunday, March 29, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

What NASA Wants To Learn From Its 'Year In Space' Tests

What NASA Wants To Learn From Its 'Year In Space' Tests

Newsy (Mar. 28, 2015) Astronaut Scott Kelly and cosmonaut Mikhail Kornienko will spend a year in space running tests on human physiology and psychology. Video provided by Newsy
Powered by NewsLook.com
Crew Starts One-Year Space Mission

Crew Starts One-Year Space Mission

Reuters - News Video Online (Mar. 28, 2015) Russian-U.S. crew arrives safely at the International Space Station for the start of a ground-breaking year-long stay. Paul Chapman reports. Video provided by Reuters
Powered by NewsLook.com
Why So Many People Think NASA's Asteroid Mission Is A Waste

Why So Many People Think NASA's Asteroid Mission Is A Waste

Newsy (Mar. 27, 2015) The Asteroid Retrieval Mission announced this week bears little resemblance to its grand beginnings. Even NASA scientists are asking, "Why bother?" Video provided by Newsy
Powered by NewsLook.com
Space Station Crew Docks Safely

Space Station Crew Docks Safely

Reuters - News Video Online (Mar. 27, 2015) NASA TV footage shows the successful docking of a Russian Soyuz craft to the International Space Station for a year-long mission. Rough cut (no reporter narration). Video provided by Reuters
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