{"id":1274,"date":"2020-05-05T14:08:37","date_gmt":"2020-05-05T14:08:37","guid":{"rendered":"http:\/\/horizon.peachpuff-wolverine-566518.hostingersite.com\/?p=1274"},"modified":"2020-05-05T14:10:09","modified_gmt":"2020-05-05T14:10:09","slug":"how-speech-recognition-techniques-are-helping-to-predict-volcanoes-behaviour","status":"publish","type":"post","link":"https:\/\/scienceblog.com\/horizon\/1274\/how-speech-recognition-techniques-are-helping-to-predict-volcanoes-behaviour\/","title":{"rendered":"How speech recognition techniques are helping to predict volcanoes\u2019 behaviour"},"content":{"rendered":"
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By Sarah Wild<\/h5>\n

Dr Luciano Zuccarello grew up in the shadow of Mount Etna, an active volcano on the Italian island of Sicily. Farms and orchards ring the lower slopes of the volcano, where the fertile soil is ideal for agriculture. But the volcano looms large in the life of locals because it is also one of the most active volcanoes in the world.<\/strong><\/h3>\n<\/div>\n<\/div>\n<\/div>\n
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More than 29 million people globally live within 10km of a volcano, and understanding volcanoes\u2019 behaviour \u2013 and being able to predict when they are going to erupt or spew ash into the air \u2013 is vital for safeguarding people\u2019s wellbeing.<\/p>\n

However,\u00a0predicting volcano behaviour is difficult<\/a>, especially if they have been dormant, and monitoring them can be challenging since taking samples or deploying equipment poses physical dangers. And while theoretical models may approximate how a particular volcano behaves given its location, geological makeup and the behaviour of the Earth\u2019s magma underneath it (amongst other things), there are still many unknown variables \u2013 and every volcano is unique.<\/p>\n

Now a researcher at the University of Granada in Spain, Dr Zuccarello is aiming to automatically analyse volcanic activities to develop early-warning models that could save the lives of people living near volcanoes.<\/p>\n

In the last decade, data collection methods have improved significantly, with new and more sensitive equipment, and researchers now have access to an unprecedented deluge of data. For example, they can access real-time information on how the Earth shakes in the vicinity of the volcano (seismic activity), the propagation of sound waves from deep within the Earth, and the chemicals present inside the volcano and how they are changing.<\/p>\n

Volcano observatories need to analyse large quantities of data in a short period of time. \u2018There is a need for faster and error-free techniques to gather such data,\u2019 Dr Zuccarello said.<\/p>\n

His\u00a0VOLCANOWAVES<\/a>\u00a0project, which includes researchers based in Spain, the United Kingdom, Italy, Mexico, and Argentina, uses machine learning to identify patterns in the seismic activity around a volcano in an effort to predict when, or if it will erupt. In particular, Dr Zuccarello is looking at the low-frequency events, such as volcanic tremors, which are usually linked to the movement of magma within a volcano\u2019s plumbing.<\/p>\n

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\u2018Speech and seismic signals share important properties.\u2019<\/p>\n

Dr Guillermo Cort\u00e9s, University of Udine, Italy<\/p>\n<\/blockquote>\n<\/div>\n

Speech recognition<\/strong><\/p>\n

In the last decade, the application of machine learning to pattern identification has been integral in speech recognition, but researchers are now using it to forecast volcanoes\u2019 behaviour. \u2018Although these fields vary significantly in terms of context and source, the object of the analysis is the same \u2013 the study of their harmonics over time in search of patterns,\u2019 Dr Zuccarello said.<\/p>\n

The project\u2019s main output will be a set of algorithms \u2013 set to be complete when the project ends later this year \u2013 and he hopes that they will be used widely in the scientific community to monitor volcanoes on a day-to-day basis.<\/p>\n

\u2018Speech and seismic signals share important properties,\u2019 said Dr Guillermo Cort\u00e9s, a specialist in signal processing and machine learning at the University of Udine in Italy. He ran a project called\u00a0VULCAN.ears<\/a>, which also used speech recognition technology to understand what volcanoes are saying.<\/p>\n

Dr Cort\u00e9s and colleagues developed a real-time volcano monitoring system, which automatically detects and labels volcanic \u2018events\u2019 in the data streams coming from monitoring stations that detect seismic signals. This system then creates catalogues of activity in order to find patterns of behaviour.<\/p>\n

Dr Roberto Carniel, a geophysicist at the University of Udine and the project\u2019s scientific supervisor, says: \u2018The arrival of machine learning and applied deep-learning techniques is uncovering new solutions for old problems. (Now) it is easier to mix results from several monitoring areas involving the study of seismic signals, infrasonic signals, magnetic signals, geochemical analysis of gases and fluids, deformation, thermal and video cameras, to produce more robust and reliable predictions.\u2019<\/p>\n

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With 29 million people around the world living within 10km of a volcano, predicting when they are going to erupt is vital for safeguarding people\u2019s wellbeing. Image credit – Pexels\/pixabay, licenced under CC0<\/figcaption><\/figure>\n

The team developed a volcanic seismic recognition system based on supervised machine learning, in which they analysed data that had already been labelled by other experts, teaching the software to identify volcano events such as volcanic tremors, ashfall, or explosions within the volcano. This approach is similar to finding words in a conversation, labelling their parts of speech and finding the patterns of language unique to each volcano.<\/p>\n<\/div>\n

This is a break from the classic methods for building catalogues of volcano behaviour, Dr Cort\u00e9s says. These methods involve the automatic detection of events and manual classification by experts. \u2018Usually they perform this task on a daily basis, which could be too slow in a situation involving a population at risk due to an unexpected eruption,\u2019 he said.<\/p>\n

Time can be of the essence when it comes to volcanoes, particularly in the event of ashfall, collapses and landslides, he says. In those cases, \u2018the detection and classification in real-time operation is critical\u2019 in order to reduce decision-making time if nearby communities need to be evacuated.<\/p>\n

Dr Cort\u00e9s\u2019 ultimate aim was to develop a system that is universal and volcano-independent that could be easily embedded at any volcano observatory. To build this, the researchers have created a universal database from dozens of volcanoes around the world and used their machine-learning techniques to build universal models. A preliminary version of this\u00a0is available online<\/a>.<\/p>\n

However, for Dr Carniel, what\u2019s important now is that volcanic observatories around the world take the work forward. \u2018They are the real key to advancing the volcano-independent idea, installing the volcanic seismic recognition system in their own observatories, sharing resources, and giving valuable feedback,\u2019 he said.<\/p>\n

These observatories are, after all, the front line of countries\u2019 efforts to protect their citizens from the volcanoes within their borders \u2013 and scientists need to be able to hear volcanoes\u2019 whispers to predict when they are going to start shouting.<\/p>\n

The research in this article was funded by the EU. If you liked this article, please consider sharing it on social media. <\/em><\/p>\n

Published by Horizon<\/a><\/em><\/p>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

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