# Medieval Humans Partly Caused Two Catastrophic Lake Tsunamis, And We Could Easily Do It Again, Scientists Warn

> **Open Intelligence Dossier** · First detected: 2026-11-05 05:40 UTC · Category: World

## Executive Summary
Scientists warn that medieval human activity, specifically deforestation and farming, triggered catastrophic 50-meter tsunamis in Italian lakes.

## Intelligence Brief
Recent scientific findings indicate that human activities during the medieval period played a role in triggering two catastrophic lake tsunamis in Italy. According to reports from ScienceAlert and The Independent, ancient Roman farming practices contributed to these events. Specifically, coverage from Around Prague identifies medieval deforestation as a primary factor that set the stage for these disasters. The resulting tsunamis were extreme in scale, with waves reaching heights of over 50 meters, causing significant destruction in the affected lake regions. Multiple outlets are highlighting the intersection of environmental mismanagement and geological instability. Around Prague and The Independent emphasize the direct link between land-use changes—such as the removal of forests—and the subsequent triggering of these massive waves.


Wodne Sprawy reports on the surprising role that human activity played in these natural disasters, while JournalArta focuses specifically on the ongoing risk associated with Lake Iseo. The collective coverage suggests that the stability of lake environments is more susceptible to human interference than previously understood. To understand why this matters, the coverage points to the precedent set by these medieval events. The historical data regarding 50-meter waves demonstrates that human-driven landscape alterations can lead to geological failures capable of producing tsunamis. This historical context is critical because it suggests that the interaction between human land use and the earth's crust can create volatile conditions. The mention of Roman farming and medieval deforestation provides a timeline of how long-term environmental changes can culminate in sudden, catastrophic water displacements.


Looking forward, scientists are issuing warnings that these types of disasters could happen again. ScienceAlert explicitly notes the warning that humans could easily repeat these mistakes in the modern era. Future attention is directed toward the risk levels of specific bodies of water, with JournalArta questioning whether 50-meter waves could return to Lake Iseo. The primary point of observation for analysts and geologists will be whether current land-use patterns mirror the deforestation and farming practices that preceded the medieval lake tsunamis.

## Multi-Source Evidence Table
| Source Outlet | Headline | Verification URL |
|---|---|---|
| Wodne Sprawy | Medieval tsunami in a lake. Scientists discover the surprising role of human activity | [Source Link](https://news.google.com/rss/articles/CBMifkFVX3lxTE45QlhIRzZlTndxVTVUcjlrbEwtQlk5X0pnSXVaUDdiTkM3N1phbHR2bDZtV1V6ZmZiS2I1UUpRQTBuX3h3ZkI3aFMyWWs2YU1SUkR4OFpNTUVUREJFajNLWmhvVkFOVGFFbFU4eVdMTUZpa3NHM0E4WWd4YS01QQ?oc=5) |
| Around Prague | Medieval Deforestation Set Up Italian Lake Tsunamis With Waves Over 50 Meters | [Source Link](https://news.google.com/rss/articles/CBMiuAFBVV95cUxQeHBlYXRMcTRCMTZ4c0U3WU1Hdnk5Nk5lRUxaTUxEclItYThKV2RlR2pmZlNldVRBNHlPWVpPYU9YeHU2a0JOeTZwRmIzU09TNWc2ZFYwTHBWYnFfa3dOaXQ3X1haeHZwaWRFZ0tnTlhMY0F6bFBzZmV6U3Y2dEJ6dkJKU3FNWU1XeFRLYWNweEZlSzNFejJBY01uOUFXQlhTTGRfT2dnUGZUYXhIcWE4X1Y3bzdydnR0?oc=5) |
| JournalArta | Lake Iseo Tsunami Risk: Could 50-Meter Waves Return? | [Source Link](https://news.google.com/rss/articles/CBMibkFVX3lxTFA2bVJIRzUtSVpRYWlNU1VWSnpwWlVEa21lU1hVQ25Td1N2ZkJxSzh6Vl9oY1M1WjFxMGhpZTBBLTNYQ0JnWC1jWUxKMEVQSlNVODl3MGY5U0wzSTU1RkJoVEVHMURyWGpWcUt5SGRR?oc=5) |
| The Independent | Terrifying 50m tsumanis were triggered by ancient Roman farming | [Source Link](https://news.google.com/rss/articles/CBMioAFBVV95cUxNRVlEaUlmMkVyRkF5ZWtoNHFER1Q5amNIV21WSHB4TFdwWTBNb1pLbndaQ3RfQjlNQWx1WDlseS1kZ3EtelJkSUxlcjBYWWZzeFdtRVJIYWhnZnRuODdNZ3FUWjdNSkFNcURLOXRxakFsaDQwMENVUnVWb0RmbUpocFpIOXNueTlaeEw5ZE5TakNLM0VVbktpXzY5QU9mZUdu?oc=5) |
| ScienceAlert | Medieval Humans Partly Caused Two Catastrophic Lake Tsunamis, And We Could Easily Do It Again, Scientists Warn | [Source Link](https://news.google.com/rss/articles/CBMi0wFBVV95cUxQVlJ4LU83RnYwV1VwUnl1eVh3RzNWQVpaOW1wMmMyUUlZTmpyRFR6WDNNSmRZbjB0ZkN3a05rRWNSTGQwMkF6cGtuUnRWRTFON0doQnVZNFQ3MzlwanlpYkVxTVdWZTUwbWxlRGk3Qnc1M2dfQkxiUVE1WWUwUHRtLU5aeEEtM3E0RnloSk05YkViRkVWTWZhZHhOZDc2bDluVjRmVzdjRFF6U1NWQmZxQ2lBX2E0a1NBZzhNTkZiLTUxcWctTjg4emRtWUg0emE2M3U0?oc=5) |

---
*Canonical Source: https://pulse.byoviral.com/trend/2026-11-05/medieval-humans-partly-caused-two-catastrophic-lake-tsunamis-and-we-could*