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We have reappraised locations and surface wave magnitudes of earthquakes this century in the Eastern Mediterranean and the Middle East, between 10° and 44°N and 18° and 70°E. The results are presented in an improved parametric catalogue of shallow earthquakes (h ≤ 40 km), large enough (MS ≥ 6.0) to be of interest in seismotectonics and earthquake engineering. A considerable number of early events of 6 ≤ MS < 7.2, not included in other catalogues, have been identified and their magnitudes assessed. We find that ISS/ISC locations are systematically shifted by 10–30 km to the north or northeast of their macroseismic epicentres. Also we derived a regional average relationship between log M0 and MS. We show that the correlation of magnitude with epicentral intensity is very weak, as is expected, and a source of error in frequency relations.
N. N. Ambraseys (Tue,) studied this question.