The earthquake that struck Lisbon on November 1, 1755, occurred before there were ways to measure temblors, but it's estimated to have been as high as 8.0 on the Richter scale. Estimated loss of life: 30,000 to 50,000.
The event widened an already wide rift in European intellectual life as philosophers like Voltaire challenged optimism and belief in a loving and engaged God.
Natural events ripple through history. How, I wonder, will this current one ripple through time?
(An engraving of the Lisbon earthquake and tsunami that followed. Courtesy Wikipedia. Four days after I posted this, the death toll in Syria and Turkey reached 41,000.)