The maximum intensity of this shock has been estimated to be in the range VII–VIII on the Mercalli–Cancani–Sieberg scale (MCS), based on comparisons with the shaking experienced at Naples and Lagonegro from earthquakes in 1826 and 1893.

The area affected by shaking of X MCS was large including, Alianello, Atena Lucana, Brienza, Calvello, Castelsaraceno, Marsico Nuovo, Missanello, Paterno, Polla, Sant'Angelo Le Fratte, Sarconi, Spinoso, Tito, Tramutola and Viggiano.

[4] Early in 1858, aided by a grant from the Royal Society, Robert Mallet visited the devastated area, and spent over two months studying the effects of the disaster, paying special attention to the damage caused to buildings.

Two French photographers, Alphonse Bernoud and Claude Grillet (misnamed as Grellier by Mallet in his report), were resident in Naples at the time of the earthquake.

[8] Mallet located his epicentre near the village of Caggiano, not far from Polla, but later examination of his data suggested that there was a second focus near Montemurro, about 40 kilometres (25 mi) to the southeast.