Login

Recent searches

No recent searches

Search options

Only available when logged in.
fosstodon.org is one of the many independent Mastodon servers you can use to participate in the fediverse.
Fosstodon is an invite only Mastodon instance that is open to those who are interested in technology; particularly free & open source software. If you wish to join, contact us for an invite.

Administered by:

Server stats:

11K
active users

fosstodon.org: AboutStatusProfiles directoryPrivacy policy

Mastodon: AboutGet the appKeyboard shortcutsView source codev4.3.4

AkaSci 🛰️

Given the dynamic origin of earth's magnetic field, its strength, direction and polarity change over time.

It has reversed polarity 183 times in the last 83 million years. The time intervals between reversals have fluctuated widely, but average about 300,000 years, with the last taking place about 780,000 years ago.

Polarity reversals have had little effect on the magnetosphere or on life on earth. However, Its effect on modern civilization may be non-negligible.

science.nasa.gov/science-resea
5/n

1. Apparent geomagnetic polarity of the Earth, 170 Ma to the present. Source : https://www3.kutztown.edu/JOCMS2011/research.html 2. Supercomputer models of Earth's magnetic field. On the left is a normal dipolar magnetic field, typical of the long years between polarity reversals. On the right is the sort of complicated magnetic field Earth has during the upheaval of a reversal. University of California, Santa Cruz/Gary Glatzmaier Source: https://science.nasa.gov/science-research/earth-science/earths-magnetosphere-protecting-our-planet-from-harmful-space-energy/
Dec 23, 2024, 01:29 AM·Public
13boosts·19favorites
ExploreLive feeds
About