A rapid change might cause birds, which use the magnetic poles to navigate, to become disoriented, maybe enough for a flock of birds to bang into each other causing internal damage and mass death.
I'm a Licensed Amateur Radio operator (Ham Radio). There are several levels of licensing, but those of us who are licensed to transmit on the High Frequencies (long distance frequencies) keep an eye on the current conditions of the eleven year solar cycle.
We do this because the increase or decrease (depending upon where we are in the cycle) of solar irradiation which reaches earth affects the distance around the globe that we are able to transmit and receive.
We are in the middle of an improving solar cycle that will peak in about 2012. For Ham Radio operators this means that radio frequency bands that have been closed to us are starting to open up and we can communicate with other Hams in countries much father around the globe.
However, some scientists are predicting that as we reach this peak, massive solar disruptions will begin happening and could cause widespread disruptions (similar to those which the electromagnetic pulse EMP bombs we keep hearing about cause).
Basically every device we depend upon will stop working and require chip replacements or major electronic repairs to get working again.
You won't be able to use any of them, unless they are stored and used behind shielding. Lead is the best electromagnetic shielding.
Lead is that stuff that the US government so vigorous campaigned against in the 1960s and 1970s for us to take off the walls of our houses because purportedly millions of children ate paint which they told us would caused mental development problems.
So our walls are no longer shielded from electromagnetic waves, nor from various methods of electronic eavesdropping.
I have read that during that time (lead safety campaign) they were also developing technology which would allow them to electronically look and listen through walls and record what they heard/saw.
The article I read said that lead paint prevented these devices from working and os actually what really prompted the government's Lead Paint removal campaigns in the 60s and 70s.
We may never know if that was true or a coincidence.
While not as good as lead, heavy aluminum shielding blocks electromagnetic waves and can be used to prevent folks from listening to conversations in your house via your cell phone (yes it can easily be done without you even knowing it), prevent the remote viewing of your computer screen (ECHELON), and more importantly, keep computers, cell phones, radios, and other devices you want to still be able to use afterwards working.
Getting back on the topic of electromagnetic disturbances:
The US military's HAARP program (based in Alaska) also has the capably to cause anomalies in the earth's Ionosphere, purportedly used in researching ways to extend the distance of military radio communications.
I have read that they are also working on extending radio communication for submarines in the ocean.
Some suspect that's a cover for a weapon they have been developing. What they are doing has been compared to the Scalar Electromagnetic Energy weapons (Tesla Howitzers) purportedly developed by the KGB which can send strong EM energy to any point on the globe and even through the earth from one point to another.
These devices are strong enough to cause a heating up or a cooling down of their target area as well as magnetic force field disturbances They can also cause stress to build on fault lines which eventually result in earthquakes. Some reports indicate they can even cause weather changes.
It is rumored that the Russians and others have been increasingly using these weapons to cause earthquakes and disasters in targeted countries around the globe in an attempt to cause increased economic problems and the eventual economic collapse of those countries.
Sounded like Science Fiction to me until I read the following:
"In January, 1960 (now 50 years ago!) Nikita Khrushchev announced to the Presidium:
'We have a new weapon, just within the portfolio of our scientists, so to speak, which is so powerful that, if unrestrainedly used, it could wipe out all life on earth. It is a fantastic weapon.'
The Russians have not yet revealed that weapon, but developed it in secret, and tested it clandestinely to see if the West could understand what was going on, whether the U.S. had discovered the weapon yet. It had not.
In 1997, 37 years after Khrushchev had announced the new (scalar electromagnetic) weapon U.S. Defense Secretary William Cohen gave a warning, suggesting that the U.S. had finally understood the nature and power of the weapon.
He warned about eco-terrorism using scalar electromagnetic weapons:
"Others [terrorists] are engaging even in an eco-type of terrorism whereby they can alter the climate, set off earthquakes, volcanoes remotely through the use of electromagnetic waves...So there are plenty of ingenious minds out there that are at work finding ways in which they can wreak terror upon other nations...It's real, and that's the reason why we have to intensify our [counter terrorism] efforts."
The above quote is from:
So G-d may be allowing (or using) man's greedy nature, warmongering, and foolish tampering with physics to cause the huge increase in earthquakes and disasters over the last few years.
Additionally, the Scalar Electromagnetic Energy they can target so precisely to any point on earth might also explain why these massive flocks of birds are dropping dead with internal trauma.
If they are testing the sending of the same through the water ways that that might explain why the fish are dying with similar conditions.
Maybe they died from artificially caused extremes of heat or cold or disorientation from magnetic force fields, or renal trauma directly caused by the beams which were sent to targeted areas where the animals just happened to be in during beta testing of these devices.
Or, maybe using advance target spotting devices they intentionally looked for large flocks of birds and attacked them intentionally as part of their testing. Maybe the same was done with the fish and whales.
More info on Scalar Weapons:
Whatever's going on...the Earth Is Shaking! Shaking like never before!! Causing people to open their eyes.