A LiDAR and field study of surface rupture and post-seismic slip for the 6th April 2009 L'Aquila Earthquake (M6.3). (URGENCY GRANT)

正常的断层地震产生同震垂直运动，以前观察到的同震垂直运动在主震后的几天和几周内通过一种被称为“震后蠕变”或“滑移后”的过程放大。至关重要的是量化同震和震后运动的相对贡献，以便解释(A)古地震观测，其中断层滑动的测量是在地震发生多年后进行的，或(B)历史文件，其中必须根据地表破坏/震动强度的记录来推断地震震级，因为如果没有这种限制，这些数据集所暗示的事件的震级将存在相当大的不确定性。此外，如果与其他大地测量数据集相结合，与这种震后蠕变相关的幅度、波长和时间尺度也可能限制发震断层的流变变化和重新加载。我们将使用激光雷达扫描2009年4月6日意大利中部L阿奎拉(6.3级)正常断层地震破裂的代表性地点，在地震发生后立即扫描，并在未来几周再次扫描，以量化滑动后的浅层地震。我们将由民防当局(E.Vittori博士和他的团队；罗马Apat-Agenzia per la Protezione Dell‘Ambiente Per I Servizi Technici；S.Barba博士和他的团队，罗马国家地质研究所，罗马)陪同，他们将帮助我们进入现场，并在地震发生后立即开始绘制破裂地图。我们已经在意大利中部的地震地质、激光雷达扫描、地震和断层的力学方面建立了专业知识，而且，这次地震发生在我们目前正在研究地震复发的地区，这是NERC赠款(NE/E01545X/1)的一部分。

Normal faulting earthquakes produce coseismic vertical motions that have previously been observed to amplify during the days and weeks after the mainshock by a process known as 'postseismic creep' or 'after-slip'. It is vital to quantify the relative contributions of coseismic and postseismic motion in order to interpret (a) palaeoseismic observations where measurements of fault slip are made many years after the earthquake, or (b) historical documents where earthquake magnitude must be inferred from records of surface damage/shaking intensity, as without such constraints there is considerable uncertainty in the magnitude of the event implied by these data sets. Furthermore, if combined with other geodetic data sets, the amplitude, wavelength and timescales associated with such postseismic creep can also potentially constrain rheological changes and reloading of seismogenic faults. We will use LiDAR to scan a representative number of locations along the 6th April 2009 normal faulting earthquake rupture in L'Aquila in central Italy (M 6.3), in the immediate aftermath of the event and again in the coming weeks to quantify shallow after-slip. We will be accompanied by civil protection authorities (Dr. E. Vittori and his team; Head of Natural Hazards Unit at APAT - Agenzia per la Protezione dell'Ambiente e per i Servizi Technici, Rome; Dr. S. Barba and his team, Rome, Istituto Nazionale di Geofisica e Vulcanologia, Rome), who will help us to access sites, and who initiated mapping of ruptures immediately after the earthquake. We have established expertise in the earthquake geology of central Italy, LiDAR scanning, the mechanics of earthquakes and faulting and, moreover, this earthquake occurred in an area where we are currently working on earthquake recurrence as part of NERC grant (NE/E01545X/1).