Pre-seismic responses of underground water level and temperature concerning a 4.8 magnitude earthquake in Greece on October 20, 1988

Abstract

It is widely known that level and temperature changes of the underground waters are associated with earthquake activity. In this paper we present results obtained from a simple and indeed inexpensive underground water level and temperature monitoring network established for the first time in a seismic zone of Greece. Sharp changes in the underground water level and temperature have been recorded mainly as pre-seismic events of the earthquake of magnitude 4.8, which occurred in the area of the network on October 20, 1988.