Centroid Moment Tensor solutions for the earthquake dataset of the project IMAGINE_IT

The project IMAGINE_IT (PI Dr. Dimitri Komatitsch) received 40 million CPU-hours on the Tier-0 GENCI/TGCC CURIE supercomputer as a winner of the 9th PRACE consortium call (2014). The awarded computational resources allowed us to construct a new 3D tomographic model for the Italian lithosphere, Im25, by combining spectral-element three-dimensional wavefield simulations and an adjoint-state method. To obtain the final model Im25, we performed 25 adjoint tomography iterations. Moreover, two additional source inversion iterations have been performed in order to improve the earthquake source parameter estimates and reduce the misfit between observed and synthetic seismograms: one inversion using the 3D wavespeed model considered as starting model of the tomographic procedure, and one inversion for the improved wavespeed model at iteration 12 (Im12). The presented table contains the Centroid Moment Tensor parameters of the163 earthquakes considered in the IMAGINE_IT project for: the initial (Time Domain Moment Tensor; http://terremoti.ingv.it/) source solution based on a 1D wavespeed model (iter=0), the source inversion solution with the starting 3D wavespeed model (iter=1), and the source inversion solution with model Im12 (iter=2).项目IMAGINE_IT（首席研究员：迪米特里·科马茨奇博士）凭借2014年第九届PRACE联盟招标中标，获得Tier-0级GENCI/TGCC CURIE超级计算机的4000万CPU小时算力资源。这批获批的计算资源助力我们结合三维谱元波场模拟与伴随状态法，构建了针对意大利岩石圈的全新三维层析成像模型Im25。为得到最终模型Im25，我们共开展了25次伴随层析成像迭代运算。此外，为优化地震震源参数估计精度、缩小观测地震图与合成地震图之间的残差，我们额外完成了两次震源反演迭代：一次以作为层析成像流程初始模型的三维波速模型为基础开展反演，另一次则针对第12次迭代得到的优化波速模型（Im12）进行反演。本表格收录了IMAGINE_IT项目涉及的163次地震的质心矩张量（Centroid Moment Tensor）参数，涵盖三类震源解：基于一维波速模型得到的初始震源解（时域矩张量（Time Domain Moment Tensor）；数据来源：http://terremoti.ingv.it/，迭代次数iter=0）、以初始三维波速模型为基础的震源反演解（iter=1），以及基于Im12模型的震源反演解（iter=2）。