--- title: "Tsunami Evacuation Routes Depend on Timing After Earthquake Strikes" url: https://newscentral.site/tsunami-evacuation-routes-depend-on-timing-after-earthquake-strikes/ language: en publisher: "News Central Site" section: "Science" published: 2026-10-27T12:40:06.000Z updated: 2026-10-29T10:04:22.145Z id: df82ea4e-e993-4ba5-9bdd-b1cb56f937df source: "Phys.org https://phys.org/news/2026-10-tool-people-successful-evacuation-routes.html" attribution: "Link to https://newscentral.site/tsunami-evacuation-routes-depend-on-timing-after-earthquake-strikes/ and name News Central Site when you quote or summarize this story." --- # Tsunami Evacuation Routes Depend on Timing After Earthquake Strikes A recent study found that timing is crucial for successful evacuation routes during a tsunami triggered by an earthquake, with individuals having mere minutes to reach safety. People living in coastal communities often face a daunting task when it comes to evacuating during a tsunami triggered by an earthquake - they must quickly choose a safe route and hope that it leads them to safety. The time factor is crucial in such situations, with individuals having mere minutes to reach a secure location after the quake. But will their chosen evacuation route be effective? A recent study sheds light on this issue, revealing that the safety of these routes depends heavily on how soon people begin to evacuate after an earthquake strikes. Researchers from Chile's Pontificia Universidad Católica de Valparaíso and Pontificia Universidad Católica de Chile have developed a low-cost tool that uses GPS data collected during community evacuation drills in Viña del Mar, combined with models of expected tsunami inundation in the central region. This innovative approach aims to help coastal residents make informed decisions about their evacuation routes. Using 119 GPS trajectories obtained from drill participants, the researchers analyzed the impact of timing on successful evacuations. The study found that if individuals had started moving immediately after the earthquake began, a significant majority, 100 out of 119 - would have been able to reach safety before being overwhelmed by floodwaters. The researchers found that waiting even a short period after the earthquake's origin to evacuate can significantly reduce the chances of reaching safety during a tsunami. In fact, if evacuations were delayed by eight minutes, the number of successful routes would drop dramatically from 100 to just 49. This is particularly concerning in areas like central Chile, where tsunamis can reach the coast within minutes of an earthquake. According to Gubler, "every minute really counts" in such situations. The researchers' findings highlight the importance of swift evacuation in minimizing the risks associated with tsunami events. To help residents and authorities understand these critical consequences, the researchers created simple yet dramatic video animations illustrating their findings. These videos aim to capture people's attention and convey the urgency of evacuating quickly during a tsunami. The impact of the videos was not lost on the drill participants, who were largely university students. As they watched their own trajectories being reached by the simulated tsunami, there was a palpable reaction in the room, with many expressing surprise at how quickly the waters would have caught up to them. The researchers used a simulated time-dependent tsunami inundation field to compare the trajectories of people evacuating during a subduction earthquake scenario in the region. This allowed them to model how quickly the waters would spread and affect different areas. As part of this study, Gubler noted that traditional evacuation maps are often static, providing little information on the actual time available for escape. He emphasized the importance of incorporating a time dimension into these tools, which is now more feasible due to advances in GPS tracking and inundation modeling. The researchers analyzed 119 trajectories and grouped them into 13 main corridors. They found that the number of safe evacuation routes decreased significantly as people delayed their departure after the earthquake struck. This suggests that timing plays a critical role in escaping a tsunami's deadly reach. In some cases, neighboring corridors showed stark differences in terms of safety. For example, one corridor revealed that nearly nine out of ten participants would have completed their evacuation when leaving eight minutes after the earthquake's origin, indicating a relatively safe escape route. The evacuation route simulations revealed stark differences between corridors, even those close to each other. In one corridor just 200 meters away from a relatively safe escape route, only about 13% of participants would have escaped safely if they had started evacuating eight minutes after the earthquake's origin. Researchers are now planning to analyze the difficulties encountered by participants during the drills, including problems with specific routes or infrastructure. This analysis will be crucial in refining the evacuation route simulations and making them even more effective. The researchers also plan to work with local authorities and institutions that supported the study to share the animations more widely. They believe sharing these videos can raise awareness about tsunami evacuation procedures, but they think it's even more impactful when individuals record their own routes during drills and see themselves being affected by a tsunami. The team is considering how to present the simulation results in a way that maximizes their impact on the community. They note that watching someone else's trajectory can be informative, but seeing one's own route being reached by a tsunami has a greater effect on making an impression. Researchers have developed a low-cost tool that can help people plan successful evacuation routes during a tsunami. The tool uses geographic information systems (GIS) to analyze the trajectory of tsunamis and identify safe escape paths. The tool's effectiveness lies in its ability to provide personalized evacuation plans, allowing individuals to see how their own location would be affected by a tsunami. This self-referential approach has a greater impact on making an impression than watching someone else's route being reached by the disaster. The tool is a valuable resource for communities at risk of tsunamis, enabling them to prepare and respond more effectively in emergency situations. --- Source: [Phys.org](https://phys.org/news/2026-10-tool-people-successful-evacuation-routes.html) Published by News Central Site: https://newscentral.site/tsunami-evacuation-routes-depend-on-timing-after-earthquake-strikes/