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by SirLuxuryYacht 2118 days ago
No for a few reasons. The article mentions that the change in heat gradient only reaches a depth of a few micrometers. The time of eclipse here on earth is ~30 sec (just as on Mars which is interesting) but I agree that total temp change should be greater. From hooke's law you could estimate the stress change caused by the temp induced strain (10^8 from the article) by making assumptions about the material and thermal properties. This would depend on rock type, local structure and sediment type and distribution. Not to mention we have all this pesky vegetation here on earth which would reduce total temp change by preemptively shading the earths surface. The isotherm due to the highest (seasonal) temperature changes on earth is somewhere between 0-50m.

Second, earthquakes tend to occur deeper in the subsurface since the surface is a free boundary where stresses are minimized. Surface ruptures result from shallow earthquakes, such as the one from the 2019 Ridgecrest sequence. The depth of the Ridgecrest earthquake was ~10km.

Lastly, the the local stress change would probably be smaller than those imposed by the moon (few kPa), and tidal stress change does not correlate with earthquake event times here on earth.

Best case would be a huge temperature swing (few ~100deg) over the hottest bare rock on earth for an hour rather than a 30 second eclipse.