Understanding “Stealthy” Volcanoes: The New Tool to Predict Eruptions
Reading the signs that a volcano puts forth prior to an eruption can mark the difference between a mere scare and a tragedy. While some volcanoes provide clear signs that can be deciphered by experts, others erupt without any prior warning. Perhaps, it is simply that we have yet to decode their signals effectively.
This could soon change.
A New Tool has been developed by a team of researchers to model the behavior of certain volcanoes. This innovative mechanism, they emphasize, will enable more effective monitoring of eruptions, thereby reducing the risks associated with these often violent natural phenomena. This is particularly useful in the case of “stealthy” volcanoes, which tend to erupt without warning.
“Despite significant advancements in monitoring, some volcanoes erupt with minimally detectable precursors or even none at all, which significantly increases the risks to nearby populations,” remarked Yuyu Li, co-author of the study, in a press release. According to Li, some of these volcanoes are not only located close to communities but also near important air traffic routes.
Silent Volcanoes play a crucial role in the development of this new tool. The research team turned their attention to Veniaminof Volcano, located in the state of Alaska. This volcano is among those categorized as “silent,” meaning that eruptions do not typically precede noticeable signs such as earthquakes or ground deformation in the area surrounding the magma chamber.
Veniaminof is just one example from a family of silent volcanoes, which also includes closer neighbors like Stromboli in Italy and Popocatépetl in Mexico. Understanding these volcanoes can help to mitigate risks in densely populated regions.
Digging Deeper into the Veniaminof Volcano reveals why it stands out. Among the 13 eruptions it has experienced since 1993, only two could be predicted. In a surprising turn of events, in 2021, it erupted without anyone noticing for three days.
Researchers examined the internal conditions that allow Veniaminof to remain undetected. Factors such as a slow magma supply and a warm host rock are crucial. Monitoring the volcano occurred over three summers leading up to one of its silent eruptions in 2018.
A Predictive Model was developed based on various factors that could influence the probability of magma explosion. These include the volume of the magma reservoir, its flow conditions, the depth of the reservoir, and its shape. This model enabled the researchers to evaluate which conditions might be linked to a silent eruption and which might not.
The team discovered that ground deformation could aid in preventing some eruptions, but the relationship between underground magma flows and eruptions is more complex than it may initially seem.
The findings from this study have been published in an article in the journal Frontiers in Earth Science.
Looking Ahead , monitoring the numerous silent volcanoes globally will not be an easy task. The current study offers insight into which volcanoes should be closely observed: those with small, warm reserves and slow magma flows, as explained by the team.
As more research unfolds, we can look forward to enhanced techniques in predicting eruptions of silent volcanoes, which could save countless lives. Tools and models developed from studies like the one on Veniaminof may lay the groundwork for early warning systems that articulate the behaviors of these enigmatic natural wonders.
In conclusion, understanding the complex interactions within these silent giants gives researchers a fighting chance to prepare for potential eruptions, thereby safeguarding nearby communities. By honing our methods of monitoring and prediction, we can hope to mitigate the risks associated with these unpredictable volcanic events.
Image credit: Alaska Volcano Observatory Photo Gallery