[rjsimmon]

The intensity of the Earth’s magnetosphere has been dropping for decades. No abnormal shifting of landmasses has accompanied that.

Non-sequitor. Because something slows, does not equate to landmass fractures, simply due to its relative motion/speed. Something making a rapid shift can. Consider holding a glass of water in your car and then brake slowly. The water would not spill because the deceleration rate is gradual and attenuated. Panic brake and water goes everywhere.

[amorphous]

Somethings to consider:

1. Magnetism depends upon a solid structure. The core could partially melt due to periods of heat build up and release.

2. The core could become out of balance.

3. The earth's crust could become out of balance.

4. Heat inside the earth could build up over time, say 100,000 years or so, and released through greatly increased volcanic activity.

5. Earth's wobble/spin procession, self-correcting, could cause major seismic activity due to changes in normal inertial experienced by plate mechanics.

6. The correlation between low sunspot activity/magnetisim and an increase in earth's seismic activity which we do not understand mechanize behind.

Just some of the dynamics we know about.

[dirtboy]

Something making a rapid shift can. Consider holding a glass of water in your car and then brake slowly. The water would not spill because the deceleration rate is gradual and attenuated. Panic brake and water goes everywhere.

Now put that water in a water bottle and repeat. Water goes nowhere.