UNIBRA / DSEBRA -- the German seismological contri-bution to AlpArray

DSEBRA--德国(德国)地震宽带阵列--是阿尔卑斯山阵列的重要组成部分，这是一个开创性的欧洲项目，目的是在我们对阿尔卑斯山造山过程的理解上取得重大突破(活动A)。DSEBRA是德国向大口径、高密度和长期地震宽带阵列的新兴时代迈出的一大步，这些阵列用作探测地球动态内部深处的地理望远镜。这种多组分研究仪器提供的详细图像将极大地提高我们对地震和火山活动等局部和快速变形现象以及地幔流动等大范围和缓慢过程的理解。这项新技术已经在北美(US-ARRAY)取得了惊人的成果，并承诺在阿尔普阵列内部以及在欧洲和世界各地进行进一步的有针对性的研究中也是如此。DSEBRA是这项SPP(MB-4D)的仪器核心，被设想为一个由100个移动宽带站组成的单一阵列仪器，可以单独部署，也可以与其他站一起部署，以形成更大的阵列。因此，DSEBRA是与德国许多研究人员共享的德国仪器库(GIPP)和永久德国区域地震台网(GRSN)相对应的理想、长期的对应物。GIPP已被德国许多研究人员共享用于短期实验，通常持续数周至最长一年。阿尔卑斯阵地震台网将是造山带规模上部署的密度最高的地震台阵。它由大约600个陆基地震仪组成，间隔约30-40公里，将覆盖大阿尔卑斯山地区。这些地震台将由利古里亚海的海底地震仪(龙虾，活动B)和位于岩石圈重组关键地点的密集地震仪(活动C和D)来扩大。新开发的基于全波形反演和逆散射的地震成像方法，当应用于来自AlpArray的前所未有的高质量数据时，可以充分释放其成像潜力。因此，AlpArray是测试和进一步开发这些创新地震学方法的理想平台。它还将为迄今尚未回答的关于山地带深层结构和活动动力学的问题提供新的见解，包括它们与地表过程的关系(研究主题1和2)。DSEBRA的任务仅从SPP-2017(MB-4D)和AlpArray开始。之后，它将作为德国其他创新举措的核心工具，与国际、多学科项目协调开展。这些可能包括在欧洲-地中海区域的长期部署或参与目前的北美地球望远镜项目的后续行动，如“俯冲区观测站”。总之，DSEBRA将把德国推向国际地球物理和地球动力学研究的前沿。

DSEBRA - the German (Deutsches) Seismological Broadband Array - forms a key part of AlpArray, a ground-breaking European project to achieve major breakthroughs in our understanding of mountain-building processes in the Alps (Activity A). DSEBRA is Germanys big step into the emerging era of large-aperture, high-density and long-term seismological broadband arrays that serve as geo-telescopes for probing the depths of Earths dynamic interior. The detailed images provided by such multi-component research instruments will vastly improve our understanding of both, localized and fast deformation phenomena such as earthquakes and volcanic activity, and large-scale and slow processes such as mantle flow. The new technology has already produced astonishing results in North America (US-ARRAY) and promises to do the same within AlpArray and in further targeted studies in Europe and around the world.DSEBRA is the instrumental heart of this SPP (MB-4D) and is conceived as a single array instrument of 100 mobile, broadband stations which can be deployed either alone or in conjunction with other stations to form even larger arrays. Thus, DSEBRA is the ideal, long-term counterpart to the German instrument pool (GIPP) which is already shared by many researchers in Germany for short-term experiments, usually lasting from weeks to a maximum of one year, and the permanent German Regional Seismic Network (GRSN).The AlpArray Seismic Network will be the densest seismic array ever deployed on the scale of an orogen. It comprises about 600 land-based seismometers spaced at c. 30-40 km that will cover the greater Alpine region. These stations will be augmented by ocean-bottom seismometers in the Ligurian Sea (LOBSTER, Activity B) and dense swaths located at key sites of lithospheric reorganization (Activity C and D). Newly developed seismic imaging methods based on full waveform inversion and inverse scattering can unleash their full potential for imaging when applied to the unprecedented, high-quality data from AlpArray. AlpArray is therefore an ideal platform for testing and further developing these innovative seismological methods. It will also provide new insight into hitherto unanswered questions on the deep structure and active dynamics of mountain belts, including their relationship to surface processes (Research themes 1 and 2).DSEBRA's mission only begins with SPP-2017 (MB-4D) and AlpArray. Afterwards, it will serve as the core instrument for other innovative German initiatives conducted in concert with international, multi-disciplinary projects. These could include long-term deployments in the European-Mediterranean region or participation in follow-up initiatives to the current North-American EARTHSCOPE project such as the "Subduction Zone Observatory". To conclude, DSEBRA will propel Germany to the forefront of international geophysical and geodynamic research.