×

Warning

JUser: :_load: Unable to load user with ID: 1543
Thursday, 26 November 2009 19:46

STEREO spacecraft finds gigantic tsunami on Sun

By
The U.S. space agency NASA has confirmed that its STEREO spacecraft has recorded "monster waves on the sun known as 'solar tsunamis'." These monster waves were thought not to exist on the Sun, but NASA says they are real.


Over the past many years, solar astronomers have argued about “solar tsunamis”; that is, large coronal shock waves on the Sun. Do they exist or are they figments of astronomers’ imaginations?

In 1959, Gail E. Moreton (1930-1982), a U.S. astronomer observing at the Lockheed Solar Observatory in Burbank, California, found what he described as a solar tsunami.

Using time-lapse photography on the chromosphere of the Sun, Moreton described hot plasma waves moving across the Sun’s surface at speeds of from 500 to 1,500 kilometers (310 to 930 miles) per second after being generated by solar flares.

He proposed that these solar tsunamis, also now called Moreton waves, occur when shock waves intersect the chromosphere of the Sun.

But, astronomers were not convinced. They were observed at various times over the next several decades.

According to the 11-24-2009 NASA media brief “Monster Waves on the Sun are Real,” astronomers saw this event recorded by Moreton but thought they were seeing something that wasn’t real—a figment of their imaginations.

The article states, “The scale of the thing was staggering. It rose up higher than Earth itself and rippled out from a central point in a circular pattern millions of kilometers in circumference. Skeptical observers suggested it might be a shadow of some kind—a trick of the eye—but surely not a real wave.”

Page two concludes.




However, now, NASA has confirmed with its STEREO spacecraft that, indeed, this “monster wave” is real. Formally, this type of monster wave is called a fast-mode magnetohydrodynamical wave, or MHD wave for short.

The STEREO (short for Solar TErrestrial RElations Observatory) spacecraft is actually two spacecraft about ninety degrees apart from one another in their orbit about the Sun.

In February 2009, they observed Sunspot 11012 erupt and send a billion-ton cloud of gas, what is called a CME, into space. This blast generated a tsunami that sped across the surface of the Sun.

And, the STEREO spacecraft recorded this action.

Joe Gurman, of the Solar Physics Laboratory at the NASA Goddard Space Flight Center in Greenbelt, Maryland, stated, "Now we know. Solar tsunamis are real."

A video of the solar tsunami observed by STEREO is found on the NASA website mentioned earlier.

What STEREO recorded was a tsunami that was about 100,000 kilometers (60,000 miles) in height. It had a speed of about 250 kilometers per second (560,000 miles per hour). And, it had as much energy as 2,400 megatons of TNT.

See an animation of a solar tsunami at Space.com.

Learn more about these monster solar tsunamis at the February 8, 2002 Montana State University article “Moreton waves and coronal waves.”


Subscribe to ITWIRE UPDATE Newsletter here

GRAND OPENING OF THE ITWIRE SHOP

The much awaited iTWire Shop is now open to our readers.

Visit the iTWire Shop, a leading destination for stylish accessories, gear & gadgets, lifestyle products and everyday portable office essentials, drones, zoom lenses for smartphones, software and online training.

PLUS Big Brands include: Apple, Lenovo, LG, Samsung, Sennheiser and many more.

Products available for any country.

We hope you enjoy and find value in the much anticipated iTWire Shop.

ENTER THE SHOP NOW!

INTRODUCING ITWIRE TV

iTWire TV offers a unique value to the Tech Sector by providing a range of video interviews, news, views and reviews, and also provides the opportunity for vendors to promote your company and your marketing messages.

We work with you to develop the message and conduct the interview or product review in a safe and collaborative way. Unlike other Tech YouTube channels, we create a story around your message and post that on the homepage of ITWire, linking to your message.

In addition, your interview post message can be displayed in up to 7 different post displays on our the iTWire.com site to drive traffic and readers to your video content and downloads. This can be a significant Lead Generation opportunity for your business.

We also provide 3 videos in one recording/sitting if you require so that you have a series of videos to promote to your customers. Your sales team can add your emails to sales collateral and to the footer of their sales and marketing emails.

See the latest in Tech News, Views, Interviews, Reviews, Product Promos and Events. Plus funny videos from our readers and customers.

SEE WHAT'S ON ITWIRE TV NOW!

BACK TO HOME PAGE

Share News tips for the iTWire Journalists? Your tip will be anonymous

WEBINARS ONLINE & ON-DEMAND

GUEST ARTICLES

VENDOR NEWS

Guest Opinion

Guest Interviews

Guest Reviews

Guest Research

Guest Research & Case Studies

Channel News

Comments