REACTIVE Invited at NORSAR 2026 - From national testbed to European visio

The talk delivered at NORSAR focused on the future of multi-sensor climate hazard observatories:

• How can diverse networks detect extreme events - from storms and floods to coastal erosion and cryosphere induced seismicity - in real time?
• How can signals from different sensors be combined to move from correlation to physical attribution of hazards?
• How can modular, physics-informed architectures provide scalable, actionable early-warning information for civil protection, utilities, and insurers?

REACTIVE demonstrates that existing geophysical networks, when used together, can capture complementary physical processes that no single observation type can see alone, offering a multi-layered picture of extreme weather and natural hazards.

But the bigger question is forward-looking:

• What would a pan-European multi-sensor observatory look like?
• Can we move from correlation to physical attribution?
• How early is “early warning,” and who benefits most?

REACTIVE was designed as a modular demonstrator—scalable, adaptable, and ready to integrate new regions, sensors, and ideas.

Why it matters: This initiative shows that existing geophysical networks, rarely used together, can become a powerful climate-hazard observatory.