Abstract The Palinuro volcanic chain (PVC) is located about 80 km offshore the Campania region (Italy) in the southern sector of the Tyrrhenian Sea. The chain consists of 15 volcanic edifices aligned in an E-W direction with two distinct major seamounts (Palinuro and Glabro). They cover a 90 km long and 20 km wide area, with a present-day volume of 2700 km3. Palinuro volcanism emplaced between 0.8 and 0.3 Ma, although shallow seismicity and hydrothermalism indicate an ongoing volcanic activity. A geomorphological analysis of the volcanic chain and data from a multichannel seismic profile reveal large volumes of buried chaotic material suggesting gravity mass sliding from the volcano flanks and slide scars. A stability analysis of the Palinuro flanks has been carried out to determine the sectors potentially prone to sliding in case of shallow volcanic earthquakes. Landslides are simulated by adopting a scenario-based approach. Tsunamis induced by these mass movements and their propagation across the Tyrrhenian Sea are modeled. Results suggest that shallow earthquakes (M ~4.6–4.8) are able to destabilize the flanks of the volcanic chain generating slope failures. Sliding volumes in the order of 1.5 km3 and 2.4 km3 may induce waves as high as 1.5 and 6 m, respectively, along the peri-Tyrrhenian coast. Our results underline the need for further investigations on the stability of the submarine volcanoes of the Tyrrhenian basin. These volcanoes are still poorly known although their instability could trigger large tsunamis along the southern Italy coastal sectors. Our recommendation is that multiparamertic monitoring networks on PVC and periodic oceanic cruises should be put into action, and further that a systematic evaluation of the tsunami hazard related to possible sliding phenomena on the flanks of the Tyrrhenian seamounts should be performed.

中文翻译：

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Palinuro 火山链（意大利第勒尼安海南部）的潜在大规模运动和随之而来的海啸

摘要 Palinuro 火山链（PVC）位于第勒尼安海南部坎帕尼亚地区（意大利）近海约 80 公里处。该链由 15 座沿 EW 方向排列的火山结构和两个不同的主要海山（Palinuro 和 Glabro）组成。它们覆盖了 90 公里长和 20 公里宽的区域，目前的体积为 2700 平方公里。Palinuro 火山作用发生在 0.8 到 0.3 Ma 之间，尽管浅层地震活动和热液作用表明火山活动正在进行中。对火山链的地貌分析和来自多道地震剖面的数据揭示了大量埋藏的混沌物质，表明重力质量从火山侧翼和滑动疤痕滑落。已经对 Palinuro 侧翼进行了稳定性分析，以确定在发生浅层火山地震时可能容易滑动的区域。采用基于情景的方法模拟滑坡。模拟了由这些大规模运动引起的海啸及其在第勒尼安海的传播。结果表明，浅层地震 (M ~4.6–4.8) 能够破坏火山链的侧翼，从而产生斜坡破坏。1.5 km3 和 2.4 km3 数量级的滑动量可能会在沿第勒尼安海岸产生分别高达 1.5 和 6 m 的波浪。我们的结果强调需要进一步研究第勒尼安盆地海底火山的稳定性。这些火山仍然鲜为人知，尽管它们的不稳定性可能会在意大利南部沿海地区引发大规模海啸。我们的建议是，应该对 PVC 和定期远洋航行的多参数监测网络付诸行动，并进一步对与第勒尼安海山侧翼可能的滑动现象相关的海啸危害进行系统评估。 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .