The Iranian Acceleromatic Data Bank:A Revision and Data Correction

The Iranian strong motion records are studied and corrected in order to develop a reliable data base for further studies such as seismic hazard assessment. The Iranian strong motion network was installed in 1974, and now comprises 1000 stations under the supervision of BHRC. This instruments are SMA-1 analog (installed before the Manjil Earthquake) and SSA-2 digital kinemetrics types (after Manjil Earthquake). Out of a total of 450 records with a priori satisfactory quality (well recorded and correctly digitized in the case of the SMA-1 records), a set of 279 records was selected for which it was possible to associate correctly determined source parameters (source magnitudes and epicentral distances): 169 correspond to SMA-1 instruments, and the remaining 110 to seismotectonics regions are; 143 in Zagros, 78 in Central-Iran / lut, 48 in Alborz, 9 in Azarbayjan and one record in the Kopeh-Dagh region. The main outcome of this paper is to provide the first strong motion catalogue of Iran, with the indication of the site conditions;the frequency band over which the records are reliable, the peak values of acceleration, velocity and displacements,the source parameters (magnitudes, epicentral and macroseismic distances), the intensity and finally the fault plane solutions whenever possible.