Several global databases of eruption properties have been developed in recent years, which contain eruption age, eruption magnitude, eruption style, and volcanic explosivity index. However, their examinations of the relationship between eruption and magmatic properties remain qualitative. To explore such relationships, we sampled and petrologically analyzed the eruptive products and have constructed a database of magmatic properties of erupted magmas at Japanese arc volcanoes during the last one hundred thousand years. The 43 erupted magmas were characterized not only by bulk SiO₂ content, but also by preeruptive melt SiO₂ (inferred from groundmass SiO₂ content) and phenocryst contents, which are the second most straightforward proxies of physical and thermodynamic properties of preeruptive magmas. Sample data were collected through a unified procedure using chemical and image analyses and mass balance calculations to obtain groundmass compositions and phenocryst contents. We examined the relationship between magmatic properties and eruption magnitude, M, as the most representative eruption property. Our database focused on explosive eruptions of M 3 to 8. By incorporating available literature data for 17 eruptions, we examined 60 eruptions in total. This study distinguished magmas from the bulk composition (e.g., basaltic, andesitic, dacitic and rhyolitic magmas) or melt composition (e.g., basaltic, andesitic, dacitic and rhyolitic melt-bearing magmas). Our results show that the maximum eruption magnitude gradually increases with increasing bulk SiO₂ content. The maximum eruption magnitude shows a sharp increase around the compositional boundary between dacitic and rhyolitic melt-bearing magmas. For the eruptions of rhyolitic melt-bearing magmas, the maximum eruption magnitude decreases with increasing phenocryst content. The largest magnitude eruptions (M 8) were of rhyolitic melt-bearing, phenocryst-poor magmas. We compared our data for Japanese arc volcanoes with data for global volcanoes. Despite their different tectonic settings, most eruptions globally are consistent with the pattern observed for eruptions at Japanese arc volcanoes. Notable deviations are supereruptions (M > 7) of monotonous intermediate magmas that occurred more than a million years ago. Although more examination is needed, especially for smaller and effusive eruptions, the observed relationships suggest that melt SiO₂ and phenocryst contents are related to maximum eruption magnitude, and should be fundamental components to characterize volcanoes and eruptions in future databases studies.

近年来已建立了几个全球性的喷发性质数据库，其中包括喷发年龄、喷发强度、喷发方式和火山爆发指数。然而，他们对喷发和岩浆性质之间关系的研究仍然是定性的。为了探索这种关系，我们对喷发产物进行了采样和岩石学分析，并构建了日本弧形火山在过去十万年喷发的岩浆的岩浆特性数据库。43 个喷发岩浆的特征不仅在于大量 SiO ₂含量，还在于喷发前熔体 SiO ₂（从地块 SiO ₂含量）和斑晶含量，它们是喷发前岩浆物理和热力学性质的第二个最直接的代表。样品数据是通过统一程序收集的，使用化学和图像分析以及质量平衡计算，以获得基质成分和斑晶含量。我们研究了岩浆特性与喷发幅度M之间的关系，M是最具代表性的喷发特性。我们的数据库专注于M 的爆发性喷发3 到 8。通过结合 17 次喷发的可用文献数据，我们总共检查了 60 次喷发。该研究将岩浆与整体成分（例如玄武质、安山质、英安质和流纹质岩浆）或熔体成分（例如玄武质、安山质、英安质和流纹质熔体岩浆）区分开来。我们的结果表明，最大喷发幅度随着本体 SiO ₂含量的增加而逐渐增加。最大喷发幅度显示在英安质和流纹质含熔体岩浆之间的成分边界附近急剧增加。对于含流纹质熔体的岩浆的喷发，最大喷发幅度随着斑晶含量的增加而减小。最大规模的喷发（M8) 为含流纹质熔体、贫斑晶岩浆。我们将日本弧形火山的数据与全球火山的数据进行了比较。尽管它们的构造环境不同，但全球大多数喷发都与日本弧形火山喷发观察到的模式一致。值得注意的偏差是 发生在一百万多年前的单调中间岩浆的超级喷发 ( M > 7)。尽管需要进行更多检查，尤其是对于较小和喷发的喷发，但观察到的关系表明熔体 SiO ₂和斑晶含量与最大喷发幅度有关，并且应该是未来数据库研究中表征火山和喷发的基本组成部分。