Estimation of Macroseismic Focal Depth without Using Isoseismals

This paper describes a method which is able to estimate the macroseismic focal depth directly from the felt intensities instead of using the isoseismals. Based on the earthquakes of the Haromszek-Vrancea region and Italy, our study demonstrates that the method is capable to produce intermediate depth (90–125 km) and can be an alternative instrument beside the network determination.