Carbon dating earthquakes
In a stratigraphical context objects closer to the surface are more recent in time relative to items deeper in the ground.
This massive magnitude 9.0 earthquake ruptured the full length of the Cascadia subduction zone – a 1,000-kilometer (600-mile) long off-shore fault paralleling the west coast of North America, extending from mid-Vancouver Island, Canada to Humboldt County in Northern California.
Since 1947, scientists have reckoned the ages of many old objects by measuring the amounts of radioactive carbon they contain.
New research shows, however, that some estimates based on carbon may have erred by thousands of years.
In the process, neutrons are produced without gamma emissions.
Analogously, the researchers theorize further that neutron flux increments, in correspondence to seismic activity, should be a result of the same reactions.