
Slow 'Stealthy' Earthquakes Under the Japanese Archipelago could be a cover for Alien Sub-Tectonic Base Construction.
http://www.indiadaily.com/editorial/4562.asp
"Slow Earthquake" is a phenomenon of a fault moving silently, stealthily, slipping over the course of several minutes to a few weeks, generally avoiding the scrutiny of geologists and geophysicists by generating few if any waves.
In Japan, Kawasaki, et al. (1995) detected a large, ultra-slow earthquake subsequent to the July 18, 1992, Sanriku-Oki, Japan earthquake (MS 6.9) which corresponded to a MW 7.3-7.7 event (quartz-tube extensometers recorded the crustal strain).