Hydrologic Changes as Possible Earthquake Precursor in Greece

Although reliable reports on pre-, co- andpost-seismic variations of the hydrologiccharacteristics of a seismic active area were knownfrom the antiquity in Greece, it was only the last twodecades that systematic research focused its intereston the hydrologic precursory phenomena. This researchis summarized in this paper.On the basis of the results of the research forearthquake precursory phenomena on the undergroundwater level and temperature at selected areas of highseismic risk, which were performed the last fifteenyears in Greece, it can be supported that monitoringthe shallow underground water level and temperaturefor detecting earthquake precursory phenomena mayprove a useful method in the frame of aninterdisciplinary research for earthquake prediction. Copyright Kluwer Academic Publishers 2001