This Manual has the purpose to support the Vesuvian Observatory shift worker in carrying out the activities set out in Annex 2: Operating Procedures for Bulletin, drawn from the document Guidelines for shiftworkers and available staff. In particular, it provides different levels of description of the activities / operations that the shift worker has to carry out during his surveillance shift, specifically in case of “Seismic event above threshold” or “Seismic swarm”. At the beginning, through a Flow Diagram it is possible to examine the sequence of all the operations that have to be carried out and their specific conditions, all contained in a single page. This diagram is then detailed through a sequence of Operations (call below “Macro Operations”) which describe, in a few lines, the steps to be performed. Lastly, each Operation (in section “Operazioni Dettagliate”) is described in all its features and details (identification of the Monitors / Stations, programs to be used, basic commands, etc.), in order to provide the shift worker (also neophyte) with all the necessary information that allow him to operate independently and in accordance with the procedures. Since some operations can be carried out in several ways, in these cases, there will also be a further section called the “Alternative Mode” that has the aim to describe, in detail, the sequence of the steps to be taken. It is important to underline that it is recommended to use the first operating mode. In fact, only the suggested methods will be shown in the Macro Operations and not the alternative ones.