Yesterday,I established an information about Dense Shaking Report for Zagreb Settlement via MeWe Platform.And today, observing M4.3 event for E Petrinja Settlement Update 2/26: Expressing a case as inverse to distance considering middle region of seismic waves mainfactor of witnessing to dense shaking reports for Zagreb Settlement.I carried-out a researching for middle region by this condition.Conclusions are summarying as selectif middle region intermsof Polje Type Kastic Morpohologies.So,expressing a role as magnifying seismic waves serious underground void morphologies at this region; Ekrem ERKUŞ Geophysics Engineer/TURKEY