Mouse circadian rhythm before the Kobe earthquake in 1995.

Mouse circadian diagrams recorded at Osaka University showed unusual mouse behavior before the Kobe earthquake on January 17th, 1995. The locomotive activities on January 16th showed drastic increases, several times above the standard deviation, during both sleep and active periods, indicating that mice perceived of some preseismic signals. Copyright 2003 Wiley-Liss, Inc.