Geophysical surveys in the Lakes Tazenat, Aydat, Chambon and Lacassou combined with a multiproxy study of sediment cores highlight Late Holocene abrupt environmental changes in the northern part of the French Massif Central (FMC). Dating landslide-induced dust layers and subaqueous slope failures impacting lake basin sedimentary fills suggest regional triggering by palaeo-earthquakes (cluster of events) either in the Puy-de-Sancy volcano area, or along the regional Limagne fault. In the present study, a cluster of palaeo-earthquakes occurring in the Sancy area between AD 1243 and 1270 are documented in the Lakes Montcineyre, Chauvet, Pavin and Guéry, as well as by the formation of Lake Lacassou following the last emplacement of the Dent du Marais landslide in the Chaudefour glacial valley around AD 1250 ± 30. Former cluster of earthquakes occurring near the Limagne fault between AD 580 and 650 are evidenced in Lake Tazenat and in maar Lake Pavin. Lake Pavin present lake-level was similarly favoured by the cluster of earthquakes between AD 1243 and 1270 and the occurrence of a slump and an outburst flood event resulting in the bypassing of a palaeo-outlet. Holocene earthquakes near the Limagne fault are suggested in maar Lake Tazenat by coeval mass wasting deposits (MWDs) around 2250 ± 50 cal. BP and around 2730 ± 30 cal. BP. A landslide-induced dust layer dated between 2760 and 2520 cal. BP at the transition from paludal to lacustrine deposits in the Chaudefour glacial valley is suggesting that the formation of Lake Chambon resulted from a first emplacement of the Dent du Marais landslide. Radionuclides and radiocarbon dating in Lake Tazenat suggest variable sedimentation rates over the last millennia due to: (i) floods during the Little Ice Age, (ii) coeval MWDs at the basin edges and an erosive turbidite in the central basin between AD 575 and 625, and (iii) lake eutrophication since AD 1945. More gravity cores are needed to directly sample and date the youngest generation of coeval MWDs detected on seismic profiles in order to test the impact in this lake of the cluster of major historical earthquakes in the FMC between AD 1450 and 1490 near the Limagne fault.

Tazenat、Aydat、Chambon 和 Lacassou 湖的地球物理调查与对沉积物岩心的多重代理研究相结合，突出了法国中部地块 (FMC)北部的全新世晚期突然的环境变化。对影响湖盆沉积填充物的滑坡诱发的尘埃层和水下斜坡破坏进行测年表明，无论是在 Puy-de-Sancy火山区还是沿区域 Limagne 断层，古地震（事件群）都引发了区域性触发。在本研究中，记录了公元 1243 年至 1270 年间在 Sancy 地区发生的一组古地震，这些地震发生在 Montcineyre、Chauvet、Pavin 和 Guéry 湖，以及在 Dent 最后一次进驻后形成的 Lacassou 湖杜马莱山体滑坡在公元 1250 ± 30 年左右的 Chaudefour 冰川山谷中。在 Tazenat 湖和 maar 帕文湖中证明了在公元 580 年至 650 年之间发生在 Limagne 断层附近的以前的地震群。帕文湖目前的湖面水平同样受到公元 1243 年至 1270 年之间的地震群的影响，并且发生了坍塌和爆发洪水事件，导致古出口绕过。大约 2250 ± 50 cal 的同时代质量浪费沉积物 (MWD) 建议在 maar Tazenat 湖中发生 Limagne 断层附近的全新世地震。BP 和大约 2730 ± 30 cal。英国石油公司。滑坡诱发的尘埃层可追溯到 2760 至 2520 cal。BP 在从 paludal 过渡到Chaudefour 冰川谷中的湖相沉积表明尚邦湖的形成是由于 Dent du Marais 滑坡的第一次就位。Tazenat 湖的放射性核素和放射性碳测年表明，过去几千年的沉积速率不同，原因是：(i)小冰河时代的洪水，(ii) 盆地边缘的同期 MWD 和公元 575 年至 625 年间盆地中部的侵蚀性浊积岩，以及 (iii)自公元 1945 年以来的湖泊富营养化。需要更多的重力核心来直接采样和确定在地震剖面上检测到的最年轻一代的同时代 MWD，以便测试 FMC 中的重大历史地震群对该湖泊的影响公元 1450 年至 1490 年之间，靠近 Limagne 断层。