Why the Earth’s magnetic poles could be about to swap places – and how it would affect us

Uncategorized
Share

Erom theconversation.com 

The Earth’s magnetic field surrounds our planet like an invisible force field – protecting life from harmful solar radiation by deflecting charged particles away. Far from being constant, this field is continuously changing. Indeed, our planet’s history includes at least several hundred global magnetic reversals, where north and south magnetic poles swap places. So when’s the next one happening and how will it affect life on Earth?

During a reversal the magnetic field won’t be zero, but will assume a weaker and more complex form. It may fall to 10% of the present-day strength and have magnetic poles at the equator or even the simultaneous existence of multiple “north” and “south” magnetic poles.

Geomagnetic reversals occur a few times every million years on average. However, the interval between reversals is very irregular and can range up to tens of millions of years.

There can also be temporary and incomplete reversals, known as events and excursions, in which the magnetic poles move away from the geographic poles – perhaps even crossing the equator – before returning back to their original locations. The last full reversal, the Brunhes-Matuyama, occurred around 780,000 years ago. A temporary reversal, the Laschamp event, occurred around 41,000 years ago. It lasted less than 1,000 years with the actual change of polarity lasting around 250 years.

Power cut or mass extinction?

The alteration in the magnetic field during a reversal will weaken its shielding effect, allowing heightened levels of radiation on and above the Earth’s surface. Were this to happen today, the increase in charged particles reaching the Earth would result in increased risks for satellites, aviation, and ground-based electrical infrastructure. Geomagnetic storms, driven by the interaction of anomalously large eruptions of solar energy with our magnetic field, give us a foretaste of what we can expect with a weakened magnetic shield.

In 2003, the so-called Halloween storm caused local electricity-grid blackouts in Sweden, required the rerouting of flights to avoid communication blackout and radiation risk, and disrupted satellites and communication systems. But this storm was minor in comparison with other storms of the recent past, such as the 1859 Carrington event, which caused aurorae as far south as the Caribbean. [….]

Cont8nue reading: https://theconversation.com/why-the-earths-magnetic-poles-could-be-about-to-swap-places-and-how-it-would-affect-us-7191


Uncategorized
Arrow of Time Reversed in Quantum Experiments
Share

From newsweek.com Scientists have shown that a fundamental physical process relating to the arrow of time can be reversed using quantum physics, with experiments showing that the very building blocks of our world can move backward—not just forward. The second law of thermodynamics enshrines the principle that disorder—or entropy—tends to …

Uncategorized
UFO Fired Upon As It Hovered Over Nuclear Bomb Storage Facility, Says Former USAF Security Policeman – VIDEO
Share

From ufohastings.com In the early 1970s, Michael D. Jenkins was a member of the 96th Security Police Squadron (SPS), located at Dyess AFB, Texas. At that time, the base was home to the 96th Bombardment Wing, composed of nuclear-armed B-52 bombers. The nukes were stockpiled at the Weapons Storage Area …

Uncategorized
Australian Aircrews Encounter UFO, Official Files Reveal
Share

From theufochronicles.com There are currently two Australian government agencies who are equipped to, and indeed do, accept UFO reports from civil aviation flight crews. They are the Australian Transport Safety Bureau (ATSB) and Airservices Australia (ASA). Of course, they do more than deal with infrequent UFO reports, and, in fact, …