Multiparameter Changes in the Earth's Crust and Their Relation to Earthquakes in Denizli Region of Turkey

Abstract

It is a well known phenomenon that some changes within the earth crust occur before and during strong earthquakes. This was experienced well in Turkey during the Marmara and Bolu-D¸zce Earthquakes in 1999, «ay-Eber earthquake in 2002 and Buldan earthquake in 2003. Multi-parameter measuring stations were established in Denizli basin in order to investigate relationship between earthquake activity and changes whitin the earthcrust in the region. The measurements have been taken in five minutes of interval. The measured parameters are; temperature of thermal waters, electric field measurements from soil and rock, an acoustic emission numbers of a bubling sink hole of Tekkehamam thermal spring area, and on the fault plane of Honaz. During «ay-Eber earthquake in 2002 and Buldan earthquake in 2003, some changes in temperature of thermal waters, electric field value and acoustic emission numbers were measured at the multi-parameter stations in Denizli. The results showed that there is a strong relation between the earthquake activity and the changes whitin the earthcrust in Denizli Region.