**3. Prediction of event and impact**

Merapi Volcano eruption assumed to be on May 14, 2021, Hours: 23.30 WIB with VEI 2. Merapi Volcano eruptions towards the crater opening to the South - Southeast, namely the Gendol River, Opak River, Kuning River and Woro River. The potential for hot cloud avalanches leads to the South-Southeast, West and Southwest sectors, namely the Gendol River, Opak River, Kuning River, Boyong River, and Krasak River.

The coverage of the Sleman Regency is affected by the danger of pyroclastic flow along the upstream river channels on Merapi Volcano that lead to the South - Southeast, West-Southwest, namely the Gendol River, Opak River, Yellow River, Boyong River, and Krasak River.


### **Table 1.**

*Number of people potentially affected by pyroclastic flows.*

*Participatory Contingency Plan to Covid 19 Adaptation of Merapi Volcano Eruption - Indonesia DOI: http://dx.doi.org/10.5772/intechopen.98360*

The primary hazard in the form of pyroclastic flow is the most destructive compared to other types of hazards. Pyroclastic flow is a flow of hot mass (300–800 degrees Celsius) in the form of a mixture of gas and volcanic material consisting of various sizes of clots moving down turbulently with speeds of up to 100–150 km/hour. The number of affected people is 18,880 people in 33 hamlets from 7 villages, from Turi District, Pakem District and Cangkringan District, according to **Table 1**.
