Soft-sediment deformation structures (SSDS) were identified in proglacial lacustrine (glaciolacustrine) sediments dated to 25–24 ka in the Buivydžiai outcrop, situated 30 km north of Vilnius in east Lithuania. These sediments accumulated in front of the last Weichselian glaciation maximum. The SSDS originated due to sandy silt liquefaction that disrupted the decimeter-thick silty sand interlayer. A NW-SE trending Buivydžiai fault was mapped in the proximity (8 km) of the Buivydžiai outcrop. The fault is well traced by a dense drilling in the sediments of the preglacial Daumantai Formation in the basal part of the Quaternary cover and attributed to the earliest Pleistocene. Depth difference of the formation along the fault is ~5–8 m; the northern flank is relatively uplifted with respect to the southern flank. The Buivydžiai earthquake was most likely induced by formation of an elastic forebulge flexure of the Earth's crust in front of the ice sheet. The magnitude was evaluated ~M = 6.0–6.5 and was most likely of shallow hypocenter depth. Furthermore, the Bystritsa (Belarus) earthquake of magnitude M = 3.5–4.0 was registered in December 1908 to the east (12 km) of the Buivydžiai outcrop along the Buivydžiai fault, which points to recurrent seismic activity of this fault.

中文翻译：

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立陶宛东部魏克瑟尔冰川最大值之前的冰湖沉积物中记录的古地震活动的证据

在位于立陶宛东部维尔纽斯以北 30 公里处的 Buivydžiai 露头中，在 25-24 ka 的前冰河湖 (glaciolacustrine) 沉积物中发现了软沉积物变形结构 (SSDS)。这些沉积物堆积在最后一个魏氏冰期最大值之前。SSDS 起源于砂质粉砂液化破坏了分米厚的粉质砂夹层。在 Buivydžiai 露头附近（8 公里）绘制了 NW-SE 走向的 Buivydžiai 断层。在第四纪盖层基底部分的冰前道曼台组沉积物中的密集钻孔很好地追踪了该断层，并归因于最早的更新世。沿断层的地层深度差异约为5-8 m；相对于南翼，北翼相对隆起。Buivydžiai 地震很可能是由冰盖前地壳弹性前突弯曲的形成引起的。震级被评估为~M = 6.0-6.5，很可能是浅的震源深度。此外，1908 年 12 月在 Buivydžiai 断层的 Buivydžiai 露头以东（12 公里）处发生了 M = 3.5-4.0 级的 Bystritsa（白俄罗斯）地震，这表明该断层的地震活动经常发生。