Detailed text transcripts for TV channel - BBCNEWS - 20210417:04:40:00
Which are acoustic signals at very low frequencies that we cannot hear, and then obviously there is a great need for monitoring of volcanic ash emissions. we have surveillance cameras, we have thermal cameras, we have computer stimulations, so this is being done virtually all the time. and i still left out a few things. but for the people here, etna is much more than just data. they call her mamma, and she is a constant companion. in 1669, the lava flow in six months covered a distance of 45 miles. it covered little villages such as nicolosi. if you look around, you can see old flows, late 180...