Spatial Correlations Between P-wave Velocities Anomalies, Thermal Waters Sources and Seismicity Parameters in Elbasani Zone

Year 2023, Volume: 18 Issue: 4, 132 - 138, 30.12.2023

Rrapo Ormeni , Hasimi Albana Como Elvin Ndreko Dhurata Hoxha Ismail Bozo Rezart

Abstract

A detailed investigation of the earthquakes epicenter distribution, low velocity layers, thermal water sources and b-value beneath Elbasani Zone Albania were studied. In the Elbasani Zone, hot mineral water (thermal waters) spot out from natural springs which have been known since the 19th century. We interpret the 3D seismic velocity structure in the Elbasani zone to understand the factors controlling the genesis of temperature and level of seismicity. A narrow low-velocity zone is imaged within the Elbasani fault zone over a length of ∼20 km, which partly penetrates into 1-4 km and into 10-14 kmdepth. The low-velocity zone correlates in space with thermal water sources area, the trending of low seismicity compare to surrounding zones and trending of high b-value. A reactivation of thermal water fracture zone is probably related to the low-velocity anomaly.A comparison of the distribution of thermal water sources shows a relationship between thermal waters and the distribution of low seismicity. From Hidraj to Llinxha and up to Kozan the surface temperature of thermal waters varies from 500 to 600 and 650 celsius.The b-value of the thermal water zonesis high over 1.0 which shows that the accumulation of stress inthis area is low.

Keywords

seismicity, velocity, thermal water, b value

Supporting Institution

National Agency for Scientific Research and Innovation (NASRI) of Albania

Project Number

8

Thanks

We express our greatest thanks to the National Agency for Scientific Research and Innovation (NASRI) of Albania for financial support, which made the publication possible.

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