Hehe... ESB "Search found 2 matches: +supervolcano"... both in thread Get a charge out of Yellowstone, do ya?
https://endless-sphere.com/forums/viewt ... =7&t=90103
... and, turns out (per Wiki:)https://en.wikipedia.org/wiki/Supervolcano
... watt says in part:
Volcanic eruptions are classified using the Volcanic Explosivity Index, or VEI. It is a logarithmic scale, which means that an increase of one in VEI number is equivalent to a tenfold increase in volume of erupted material. VEI 7 or VEI 8 eruptions are so powerful that they often form circular calderas rather than cones because the downward withdrawal of magma causes the overlying rock mass to collapse into the empty magma chamber beneath it.
Known super eruptions
... and this PBS documentary NOVA Mystery of the Mega Volcano
covers Lake Toba on the island of Sumatra in Indonesia... about 74,000 years ago. (Before yer Gramma was born...)
VEI 7 eruptions, less colossal but still massive, have occurred in historical times. The only ones in the past 2,000 years are Tambora, in 1815...
Hehe... Watt some in the Bicycle World know ALL about.
On ESB from 2007 History of the bike and Power-Assist
https://endless-sphere.com/forums/viewt ... f=3&t=1125
ES changed my life (for the waaaaay better).
Eff. June, 2014 Phoenix Ebike Promotions
(Current ride? High speed lawn chair.)
Phoenix Ebike Promotions conversion kit (work in progress. More drink holders, etc etc)
Joined yer local chapter of EA yet?
(Ebikers Anonymous - Where we're all miserable failures, but the parties are hilarious...)