Detailed processing and analyses of aeromagnetic data supported by geological constraints shed new light on the structural framework and plumbing system of Huichapan Caldera and Nopala volcano in the northern sector of the Mexican Volcanic Belt. The interpretation of magnetic anomalies is complex due to the bipolar nature of the magnetic field so we applied reduction to the pole using a double fast Fourier transform to convert the magnetic anomalies into simplified patterns. Short optimal continuous analytical field filters enhanced subsurface and surface structures. The reduction to pole analysis filtered for the upward/downward continuation of potential field data improved both regional and detailed imaging since it was applied to different depths. Shallow subsurface structures as well as at depths of 1.25 km and 0.65 km, were correlated with the surface and regional features.

The Huichapan Caldera has at least two contrasting ignimbrites. Results show that there are two large magnetic anomalies associated with different volcanic structures. The first one, a circular positive anomaly corresponds to the caldera rim and the other to the structure of the younger Nopala volcano to the west. Strong magnetic sources indicate the feeder dikes. This study provides geophysical evidence for the location of the head wall of the Huichapan caldera as well as a second rim on the south but E-W and NE-SW regional faulting has destroyed this older caldera on the north. Results show that the structures are tectonically controlled and that the caldera is open on the east and southwest. The trap door structure was associated with this regional fault.

对地质约束支持的航磁数据的详细处理和分析为墨西哥火山带北部的惠查潘火山口和诺帕拉火山的结构框架和管道系统提供了新的线索。由于磁场的双极性质，对磁异常的解释很复杂，因此我们使用双快速傅立叶变换对磁极进行归约，以将磁异常转换为简化模式。短优化连续分析场过滤器增强了地下和表面结构。极点分析的减少过滤了势场数据的向上/向下延续，改进了区域和详细成像，因为它被应用于不同的深度。浅层地下结构以及 1.25 公里和 0.65 公里的深度，

Huichapan Caldera 至少有两个对比鲜明的 ignbrites。结果表明，有两个大的磁异常与不同的火山结构有关。第一个，圆形正异常对应于火山口边缘，另一个对应于西部年轻的诺帕拉火山的结构。强磁源表明馈线堤。这项研究提供地球物理证据，Huichapan火山口的顶壁，以及在南部，但第二轮辋的位置Ë -W和NE-SW区域性断裂摧毁的北这个旧的火山口。结果表明，构造受构造控制，火山口向东和西南部开放。活板门结构与该区域断层有关。