「⋯在美國中西部觀察到的地震模式像是餘震。我們認為這些地震是發生在1811、1812年間大地震斷層的位置,而且逐漸減弱」
“...many of the earthquakes we see today in the Midwest have patterns that look like aftershocks. They happen on the faults we think caused the big earthquakes in 1811 and 1812, and they've been getting smaller with time.”