Stability of the Infrastructure and Earthquake Damage

 

The involvement of the Geological Survey in this subject focuses on building models to examine the behavior of the infrastructure near the time of an earthquake and to estimate the probability of its occurrence in time and space. These subjects are carried out in coordination with the Laor Committee (earthquake damage) and with planning authorities and municipal bodies. The central projects include:

- Establishing an integrated system of radar interprometry (InSAR) and geodesy GPS for studying crustal deformation and the effect of earthquakes. They focus on applying methods of remote sensing and satellite technologies for examining the changes occurring on the surface and affecting the stability of the infrastructure. They are funded by the Israel Space Agency and by the Israel-United States Bi-national Fund.

- Building a 3-dimensional monitoring arrangement for radon and accompanying parameters in the volcanic system of Tenerife. This is a project is funded by the European Community and carried out jointly with European researchers. In the framework of the project, detectors of gas, temperature and pressure have been placed in an active volcanic area. The study examines connections in time and space between the examined parameters and the volcanic and seismic events.

- Continuous monitoring of the high radon discharge in the Dead Sea and Elat areas. Parallel to the continuous monitoring of the radon, a magnetometric monitoring is also being carried out (instrument and project funding mainly by the Israel Mapping Centre and the Soreq Center for Atomic Research. The data from these two realms are correlated and cross-checked with seismic monitoring data.

- Defining suspected active faults, and their geological and seismic mapping. With the completion of the 1:200,000 geological map of Israel, problems related to the determination of active faults and their implications for defining hazards, were examined. Cross-checking the data obtained with earthquake epicenter and intensity maps, is resulting in the preparing of a seismic area map of Israel.

- Evaluation of seismic hazards in the Jerusalem area. This study is being financed by the Jerusalem municipality.

- Paleoseismology in the Bet She'an Valley and Arava.  These studies are examining paleoseismicity along the active fault system of the rift, largely supported by research grants. (Neotectonic and paleoseismic study of the Bet She'an Valley)

- Seismic intensity in the coastal plain. The project is being carried out in conjunction with the Geophysical Institute and with funding of the Hekhal Committee. It is examining anticipated seismic intensification and the influence of the subsurface structure.

- Landslide hazards related to earthquakes. The project, funded by the Hekhal Committee, deals with developing criteria for quantitatively evaluating hazards due to possible landslides and focuses on several key areas, such as Jerusalem and the Galilee.

- Dead Sea Area. Detailed studies of earthquakes and tsunamis are being carried out in this seismicaly active area.