And then there are the M-Disk: http://www.extremetech.com/computing/92286-m-disc-is-a-dvd-made-out-of-stone-that-lasts-1000-years. USD DOD test: http://www.mdisc.com/uploads/M-DISC_1sheet_ChinaLake_vF.pdf. Down side, requires writer that is M-Disk capabale, and disk are expensive (ie about 3 bucks per disk.
The Shaanxi earthquake's epicenter was in the Wei River Valley in Shaanxi Province, near the cities of Huaxian, Weinan and Huayin.
Quick Answer. According to the Encyclop?dia Britannica, the Shaanxi earthquake occurred due to movement along the three major fault lines that form the basin of the Wei River. Considered to be the most deadly earthquake in history, the 1556 earthquake left approximately 830,000 people dead and altered the landscape of the Shaanxi province. Continue Reading