via Earth’s Magnetic Field Is Drifting Westward, and Nobody Knows Why

Over the 400 years or so that humans have been measuring Earth’s magnetic field, it has drifted inexorably to the west. Now, a new hypothesis suggests that weird waves in Earth’s outer core may cause this drift.

The slow waves, called Rossby waves, arise in rotating fluids. They’re also known as “planetary waves,” and they’re found in many large, rotating bodies, including on Earth in the oceans and atmosphere and on Jupiter and the sun.

via Earth’s Magnetic Field Is Drifting Westward, and Nobody Knows Why

Advertisements
Standard

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.