Are there any Arby's left in Calgary? This thread title makes me think of the Jamocha Shake.
Quote:
Originally Posted by Buff
How do they know the magnitude of the quakes in the 1600s, 1700s and 1800s when the scales were developed in the 1900s?
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They look at reports from the time period to see what sorts of effects were experienced at various locations during the quake and extrapolate based on the distance from the epicenter and what they know of the expected damage caused by different magnitudes of earthquakes.
https://slate.com/news-and-politics/...years-ago.html