Ping for the Sunken Earth info grams. 8<)
Yes, there IS a cluster of earthquakes right underneit the Yellowstone Lake, in the middle of the Yellowstone caldera.
Yes, the Yellowstone caldera regularly erupts catastrophically about every 600,000 years.
Yes, we are now 600,000 years from its last catastrophic eruption, and so - by the law of averages - “due for the next eruption of Yellowstone, and its destruction of the US mid-state economies and life. ...
BUT! Yellowstone also erupts “every 600,000 years”. Means that it could erupt next year - but in reality, the next Yellowstone eruption will be preceded tens if not hundreds of of thousands of massive earthquakes over a 200-1200 year period as pressure builds up and the dome expands. Not by 10-30 feet, but by 2,000 to 6,000 feet. Mt Mazama (west coast of Oregon-California where Crater Lake is now in its blown-off caldera) is over 8000 feet relief from the surrounding geology - that’s after the top got blown off.
The Yelowstone caldera is still under a lake - it has a long way to go to even force the lake to empty, much less fill a mountain top.
Now, about that off-shore Cascadia fault off the Oregon-Washington coast - affecting also the north California-southern British Columbia coast. That offshore fault last triggered with an 8.5 - 9.0 magnitude quake January 27 1700. And THAT cycle is not 600,000 years - +/- 200,000 years. Its tsunami’s are not 2-3 foot, they are 30-50 foot waves just like those that wiped out Japan’s eastern shore less than 15 years ago.
BUT the Cascadia Fault triggers magnitude 8.5 to 9.0 earthquakes regularly at a 520 year interval! THERE, when we say “It is overdue for the next earthquake” we mean by “only decades” not hundreds of thousands of years. Earthquakes have occurred recently, and regularly, in the years below:
1700 AD
900 AD
700 AD
400 AD
400 BC
900 BC.
Intervals between magnitude 8+ earthquakes of the Oregon-Washington coast?
800, 200, 300, 800, 500.
Average interval between earthquakes = 520 years,
Std deviation = 277 years.
I seem to recall reading about a mountain in the Atlantic that if the side of it collapsed into the sea would yield a tsunami 500-1000 feet high along the northeast coast of the US.