Observations of the Seismic Shadow Zone from the 29 July 2025 M 8.8 Kamchatka Earthquake.

Students from Italy’s “Galileo Galilei” High School analyzed Earth’s deep structure using seismic velocity models from the Preliminary Reference Earth Model (PREM) by Dziewonski and Anderson (1981), alongside data recorded by the Edumed seismic array. Following the M 8.8 Kamchatka earthquake on 29 July 2025, they accessed real-time global seismic data through the Tectoglobe software hosted on the Edumed platform (available at https://edumed.unice.fr/). Their analysis confirmed the classical seismic shadow zone, clearly showing the P-wave gap and the complete absence of S-waves beyond 100°, which is direct evidence of Earth’s liquid outer core.

Beyond its technical success, this project illustrates the power of the “learning by doing” method, highlighting the educational value of the Edumed network. Such hands-on research transforms theory into tangible discovery, demonstrating how open-access educational seismic data and tools can support authentic scientific inquiry and educational innovation while fostering scientific reasoning.