Dikes feed most eruptions, so understanding their mechanism of propagation is fundamental for volcanic hazard assessment. The variation in geometry of a propagating dike as a function of the injection rate remains poorly studied. Here we use experiments injecting water into gelatine to investigate the variation of the thickness, width and length of a flux-driven dike connected to its source as a function of the injection time and intruded volume. Results show that the thickness of vertically propagating dikes is proportional to the injection rate and remains constant as long as the latter is constant. Neither buoyancy nor injected volume influence the thickness. The along-strike width of the dike is, however, proportional to the injected volume. These results, consistent with the inferred behaviour of several dikes observed during emplacement, open new opportunities to better understand how dikes propagate and also to forecast how actively emplaced dikes may propagate once their geometric features are detected in real-time through monitoring data.

中文翻译：

---

在模拟通量驱动的实验中关联堤的几何形状和注入速率

堤坝是大多数火山爆发的源头，因此了解火山爆发的传播机制是评估火山灾害的基础。传播堤坝的几何形状随注入速率的变化的研究仍然很少。在这里，我们使用将水注入明胶的实验来研究与源连接的助焊剂驱动的堤坝的厚度，宽度和长度随注入时间和侵入体积的变化。结果表明，垂直传播的堤坝的厚度与注入速率成正比，只要注入速率恒定，即可保持恒定。浮力和注入量都不会影响厚度。但是，堤坝的沿袭宽度与注入的体积成正比。这些结果与在安置期间观察到的若干堤防的推断行为一致，