While it is not direct evidence of an underground base... the dismissing it as a series of bombing impacts is even more ludicrous.
Look at the depth... I don't think that any
incarnation of the Massive Ordinance Penetrator can get that deep.
Lets take just one of those "clusters"
10/1/1982 - 35.73 : -117.75 Mag 3.4 Depth 5 km
10/1/1982 - 35.73 : -117.75 Mag 5.4 Depth 8 km
10/30/1982 - 35.73 : -117.75 Mag 3.5 Depth 7 km
1/5/1983 - 35.73 : -117.75 Mag 3 Depth 8 km
1/7/1983 - 35.73 : -117.75 Mag 3.9 Depth 7 km
1/8/1983 - 35.73 : -117.75 Mag 3.3 Depth 9 km
1/13/1983 - 35.73 : -117.75 Mag 3 Depth 9 km
Average Depth - 6.85 km
Average Quake Size - Mag 3.42
Now... at a depth of 6.85 km, you are 22461 feet underground. This presents a heat issue. Using data from observations at the Comstock mine in
Nevada, temperature increases at about 1 degree for every 29 or 32.3 feet lower that you dig.
Assuming a 50 degree temperature as a start point... equating to about 25 to 75 feet down (I believe that this is realistic assumption), then by the
time you reach 22461 feet, you are at about 745º to 824º F.
Even if the depth is actually at 3.5 km (since that value shows up in the oddly patterned quakes quite often) you are at 11483 feet and 405º to 446º
No matter how you look at it, you will need some serious infrastructure to cool the place off. Either chilling towers, piping the heat to a river
system, etc. That or the place would have to be occupied by someone/thing capable of existing in that sort of environment... say, a Venusian. (I'm
not postulating that, just observing that it's just as hot on Venus.)
So... what you should be looking for, is some evidence of how this heat issue is being dealt with. Something like a stream or river being A LOT
warmer than it should be... or a nuclear reactor plant whose cooling towers never decline in heat output even when the reactor is offline... stuff
Meanwhile, Geocover 1990 of the area (warning, large image)
And Geocover 2000 of the same area... also a large image.
The green red and yellow ovals are Nasa Worldwind's plot of the quakes from the OP's Google Earth imagery.
The historical data comes from neic.usgs.gov...
[edit on 8-11-2009 by RoofMonkey]