Volcanic eruptions from Gamalama volcano often threaten Ternate Island, a small volcanic island with more than 200,000 inhabitants in North Maluku Province. Ternate Island has an area of 111.4 km 2 , and the distance between settlements and the crater ranges from 4-7 km. With those conditions, Ternate Island has become one of the areas in Indonesia with a high risk of volcanic hazards. As one of the efforts to reduce volcanic risk, it is essential to understand the characteristics of volcanoes, including the relationship between the repose period and the eruption magnitude. Historical data on the eruption of the Gamalama volcano from 1510-2018 were collected from various reliable sources and analyzed statistically to determine their relationship. The results show no significant relationship between the repose period and the magnitude of the eruption. The results also show that the eruption's average repose time from 1510-2018 is unreliable and cannot be generalized. However, one thing that is quite interesting to be studied further is related to the positive relationship between the length of the repose period and the impact of the resulting eruption. This incident was recorded in several eruptions at Gamalama volcano, such as in 1960Gamalama volcano, such as in , 1980Gamalama volcano, such as in , 2003Gamalama volcano, such as in , and 2011. These findings require people living on Ternate Island to increase their preparedness and practice in dealing with eruption disasters following the contingency plan from the disaster management authority.