EXCERPT: [...] 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.
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.scarce. But big questions remain....
EXCERPT: [...] 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.
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.scarce. But big questions remain....
Quote:Why the magnetic poles could be about to swap places
look'n for the "y"
Quote:It lasted less than 1,000 years with the actual change of polarity lasting around 250 years.
ummm...
i do not understand the math in this statement.
so there was some type of "event" that lasted 1000 years...
and then in combination to the "event" the pole swap occured for 250 years....
im guessing maybe there is a few words missing from their article.
i am guessing(due to other information i have read on this subject many years ago) that the event of the shift is due to the poles weakening but not shifting.
thus the weakening due to pre shift and post shift are indicators and also atributable to the lowering magnitude of the magnetic field.
i vaguely recall reading some potential algorythems to formulate cyclic frequency however it appeared to have excessive randomness in it.
what ever the randomness trigger is, there is no apperent knowledge.
maybe it will not change now due to the moon being further away ?
or maybe due to humans electromagnetic effects on the earth...
there is 2 basics issues that are easily confused.
1 pole shift/swap
2. magnetic field weakening.
we should probably not care soo much about the pole shift/swap
however the magnetic field weakening issue is probably worth some consideration.
Quote:Why the magnetic poles could be about to swap places
look'n for the "y"
Other than being a general consequence of fluid instabilities in the core's dynamo characteristics, there's no consensus agreement on a [specific] explanation of how the reversals occur (or cause being limited to just one factor). Thus maybe why this brief news piece didn't offer a "why" beyond those past frequency rates of the shifts and it getting closer to one being due. (Actually overdue unless the temporary one of 41,000 years ago is counted, but not necessarily "close" in terms of happening during our lifetimes.)
A reversal process would affect navigational compasses and migrating animals, produce auroras in strange places, perhaps cause some intermittent electrical disturbances, and yield a slight to modest increase in risk of cancer.
EXCERPT: [...] in less than 100 years – roughly a human lifetime. “It’s amazing how rapidly we see that reversal,” said UC Berkeley graduate student Courtney Sprain. “The paleomagnetic data are very well done. This is one of the best records we have so far of what happens during a reversal and how quickly these reversals can happen.” Sprain and Paul Renne, director of the Berkeley Geochronology Center and a UC Berkeley professor-in- residence of earth and planetary science, are coauthors of the study, which will be published in the November issue of Geophysical Journal International and is now available online. The discovery comes as new evidence indicates that the intensity of Earth’s magnetic field is decreasing 10 times faster than normal, leading some geophysicists to predict a reversal within a few thousand years.
Quote:Why the magnetic poles could be about to swap places
look'n for the "y"
Other than being a general consequence of fluid instabilities in the core's dynamo characteristics, there's no consensus agreement on a [specific] explanation of how the reversals occur (or cause being limited to just one factor). Thus maybe why this brief news piece didn't offer a "why" beyond those past frequency rates of the shifts and it getting closer to one being due. (Actually overdue unless the temporary one of 41,000 years ago is counted, but not necessarily "close" in terms of happening during our lifetimes.)
A reversal process would affect navigational compasses and migrating animals, produce auroras in strange places, perhaps cause some intermittent electrical disturbances, and yield a slight to modest increase in risk of cancer.
EXCERPT: [...] in less than 100 years – roughly a human lifetime. “It’s amazing how rapidly we see that reversal,” said UC Berkeley graduate student Courtney Sprain. “The paleomagnetic data are very well done. This is one of the best records we have so far of what happens during a reversal and how quickly these reversals can happen.” Sprain and Paul Renne, director of the Berkeley Geochronology Center and a UC Berkeley professor-in- residence of earth and planetary science, are coauthors of the study, which will be published in the November issue of Geophysical Journal International and is now available online. The discovery comes as new evidence indicates that the intensity of Earth’s magnetic field is decreasing 10 times faster than normal, leading some geophysicists to predict a reversal within a few thousand years.
would we be able to grow more protective foods like avacados and almonds ?
i intend to start looking through historic meteor strikes to see if any coincide with the pole shifts.
assuming i can find the info i need.
might try that in a few days
(Feb 1, 2017 03:20 AM)RainbowUnicorn Wrote: would we be able to grow more protective foods like avacados and almonds ?
Just avoid eating too many of the ones with a little extra....
"... commonly called hydrogen cyanide but known technically as glycoside amygdalin transforms into toxic prussic acid after an almond is crushed or chewed. Hydrogen cyanide is a natural component in peach and apricot pits. Almonds are a member of the same family. Eating foods that contain prussic acid may result in some or all of the following signs and clinical symptoms within minutes: dizziness, headache, nausea and vomiting, rapid breathing, rapid heart rate, restlessness and weakness..."
Usually just the bitter almonds, but sometimes....
(Feb 1, 2017 03:20 AM)RainbowUnicorn Wrote: would we be able to grow more protective foods like avacados and almonds ?
Just avoid eating too many of the ones with a little extra....
"... commonly called hydrogen cyanide but known technically as glycoside amygdalin transforms into toxic prussic acid after an almond is crushed or chewed. Hydrogen cyanide is a natural component in peach and apricot pits. Almonds are a member of the same family. Eating foods that contain prussic acid may result in some or all of the following signs and clinical symptoms within minutes: dizziness, headache, nausea and vomiting, rapid breathing, rapid heart rate, restlessness and weakness..."
Usually just the bitter almonds, but sometimes....
dia consequences of eating refined raw products that you are not educated about.
RE protective foods, i was pondering foods that help the body process, neutralise or block radiation.
i had read something about avacados however i can not recal the specifics.
with a reduced magnitosphere from de-polarisation we would be subjected to massive amounts of radiation.
with evidence clearly showing pole shifts the consequential radiation has been argued to be fatal for the human species.
thus leading to conjecture for reasons behind places like this