Assertion: magnetic field's strength | /r/CapableOf | decrease for at least 160 years
Facets:
value: at an alarming rate
type: MANNER
value: according to tarduno
type: OTHER
Source sentences:
text: According to Tarduno, the strength of Earth's magnetic field "has been decreasing for at least 160 years at an alarming rate, leading some to speculate that we are heading toward a reversal.