2025-06-18 カーディフ大学
Global Real-time Early Assessment of Tsunamis (GREAT), uses sound waves that travel through the ocean much faster than tsunamis and can be detected by underwater microphones called hydrophones.
＜関連情報＞
- https://www.cardiff.ac.uk/news/view/2907831-new-technology-uses-underwater-sound-waves-for-faster-and-more-reliable-tsunami-warnings-in-real-time
- https://gmd.copernicus.org/articles/18/3487/2025/
GREAT v1.0： グローバルなリアルタイム津波早期評価 GREAT v1.0: Global Real-time Early Assessment of Tsunamis
Usama Kadri, Ali Abdolali, and Maxim Filimonov
Geoscientific Model Development Published:13 Jun 2025
DOI:https://doi.org/10.5194/gmd-18-3487-2025
Abstract
We introduce a tsunami warning technology towards a global real-time analysis. The technology is based on the analysis of acoustic signals generated together with the tsunami, due to the compression of the water layer. The acoustic signals propagate much faster than the tsunami and thus can be recorded at hydrophone stations, which in turn enables the analysis in real time. The presented technology comprises a collection of models that have been integrated into a software with the goal to make it operational and to complement efforts by warning centres and provide a more reliable assessment, globally. The main models that were integrated into the software are presented and briefly discussed. Test cases performed by the software are compared with DART buoy observations, showing satisfactory agreement, though discrepancies arise in particular at far distances and locations separated by land. The calculation time of a full global-scale analysis is in the order of tens of seconds on a standard multi-core machine, without reliance on pre-computations, making it an appropriate real-time forecast.
