One indicates minor volcanic unrest. According to geonet, a geological hazard agency in new zealand lake taupo sits within the giant caldera of a super volcano on new zealands north island. Roughly six miles above the magma chamber. The volcano has erupted 25 times in the last 12. 000 years, most recently in the year ad 232, resulting in the largest and most violent eruption on earth in the past 5000 years, super volcanoes, which also include yellowstone long valley in eastern california and toba in indonesia, are volcanoes that erupt with magnitude 8 or greater on The volcano explosivity index, which means that deposits of the eruption are spread further than 240 cubic miles. According to geonet, more than 700 earthquakes have been recorded beneath lake taupo in 2022, with an increase in the frequency of these earthquakes being seen since may at depths between 2.5 and 8 miles beneath the lake. This marks the first time that geonet has raised the val for taupo volcano to de one Music. However, there have been 17 previous episodes of similar volcanic unrest over the past 150 years, some of which were more severe than what is currently being observed. The val scale ranges between zero with no volcanic unrest and eight, which represents a mega colossal volcanic eruption. None of these episodes or the many other episodes which would have occurred over the past 1800 years before written records were kept ended in an eruption. Geonet said in a statement, the chance of an eruption at taupo remains very low.
In any one year, Music, the earthquakes near lake taupo have been caused by volcanic unrest according to geonet, which is when magma or magma heated, hot water and steam forced their way through the ground, leading to earthquakes and ground movement. Research published in the new zealand journal of geology and geophysics in february found that the ground under lake taupo has been shifting. According to the paper, the ground at the southern end of the lake sank by 5.5 inches, while at the northeastern section with the most active vents, the ground rose by around 6.3 inches according to geonet taupo s. Volcanic unrest could continue for months without any real eruption. However, it could cause landslides resulting from earthquakes, mud, lahars, a violent type of mud flow or debris flow and ground subsidence. Another new zealand volcano hit the headlines in 2019, when white, island or wakari suddenly erupted. As a tourist group was hiking on the island, killing 22 people and seriously injuring 25 others, Music topple will most likely erupt at some stage over the next few thousand years and so its important that we monitor and understand these unrest periods so that we can quickly Identify any signs which might indicate a forthcoming eruption: victoria university of wellington.