Introduction.- Characteristics of a Sensitive Well Showing Pre-Earthquake Water-Level Changes.- Streamflow Changes in the Vicinity of Seismogenic Fault After the 1999 Chi–Chi Earthquake.- Anomalous Streamflow and Groundwater-Level Changes Before the 1999 M7.6 Chi–Chi Earthquake in Taiwan: Possible Mechanisms.- Preseismic Changes of Water Temperature in the Yushu Well, Western China.- Hydrological Changes Induced by Distant Earthquakes at the Lujiang Well in Anhui, China.- Quantitative Assessment of the Mechanisms of Earthquake-Induced Groundwater-Level Change in the MP Well, Three Gorges Area.- Analysis and interpretation of earthquake-related groundwater response and ground deformation: a case study of May 2006 seismic sequence in the Mexicali Valley, Baja California, Mexico.- Background Stress State Before the 2008 Wenchuan Earthquake and the Dynamics of the Longmen Shan Thrust Belt.- Tectonically Induced Anomalies Without Large EarthquakeOccurrences.- Experimental Study of Thermal Field Evolution in the Short-Impending Stage Before Earthquakes.- Hydrogeological and Geochemical Observations for Earthquake Prediction Research in China: A Brief Overview.