From a Scientific American account of a Thai earthquake on May 13, 1848:

During the shock, there spontaneously came out of the ground a species of human hairs in almost every place — in the bazaars, in the roads, in the fields, and the most solid places. These hairs, which are pretty long, stand upright and adhere strongly to the ground. When they are burned, they twist like human hairs and have a burned smell which makes it to be believed that they are really hairs; they all appeared in the twinkling of an eye during the earthquake. The river of Chantibun was all rippling, and bubbles rose to the surface, so that the water was quite white. It is thought that these hairs may have been produced by electricity.

Similar “hairs” have been reported after other Asian earthquakes. Some have been identified as fibers from the hemp palm Chamaerops fortunei, a native tree. Others remain unexplained.