mandag 17. januar 2022

Why satellites are key to understanding Pacific volcano

When an enormous underwater volcanic eruption occurred in the South Pacific near Tonga on Saturday, satellites were in position to capture what had happened. That's because there's a large and growing fleet of Earth observation spacecraft overhead. Some have constant eyes on particular regions of the Earth, meaning their data is immediately available to study, while others are tasked with making follow-up observations.

All of the information these satellites gathered will aid the emergency response, and help scientists better understand the event. There are a group of spacecraft that monitor weather systems from 36,000km (22,370 miles) above the Earth. They scan an entire hemisphere every few minutes, relaying images of what they see to the ground to inform up-to-date forecasts.