•   
  •   

Australia Could we really have a volcanic eruption in Australia?

02:21  29 november  2021
02:21  29 november  2021 Source:   9news.com.au

A Mass Extinction 250 Million Years Ago Seems to Have Had Multiple Causes

  A Mass Extinction 250 Million Years Ago Seems to Have Had Multiple Causes The end-Permian mass extinction (EPME) was quite the mass extinction event, wiping out 80-90 percent of land and sea species – and researchers have now identified a new contributing factor to this period of devastation. More informally known as the Great Dying, the EPME is the most severe extinction event our planet has ever seen. Previous research has identified a series of huge volcanic eruptions as the primary cause of the event, with volcanic ash increasing temperatures, carbon dioxide levels in the atmosphere, and ocean acidification. It's also among the more mysterious of extinctions.

Stretching across south east Australia is a "large" and young volcanic region that has the potential for future eruptions, a leading volcanologist says.

Volcano scientist and Adjunct Associate Professor at Monash University, Heather Handley, pointed to a study conducted by Monash University's School of Earth Atmosphere and Environment, which claims magma reserves are trapped below the Newer Volcanic Province.

This geological area stretches across Mount Gambier in South Australia all the way into Melbourne in Victoria.

READ MORE: Defence tactics to stop hazardous asteroids hitting Earth

Dr Handley told 9News.com.au the magma may be left over from previous activity or accumulating for future activity.

Canary Islands: The Volcano Cumbre Volcano Lava Near the Sea, 3000 people confined

 Canary Islands: The Volcano Cumbre Volcano Lava Near the Sea, 3000 people confined © Luismi Ortiz The phenomenon is responsible for toxic emanations. AFP / Luismi ORTIZ This is an eruption that does not end. The authorities of the Spanish Island of La Palma, in the Canaries Archipelago, have decreed on Monday the confinement of about 3,000 people, for fear of potential toxic emanations related to the arrival in the sea of a new casting Spreaded lava by the Volcano Cumbre Vieja .

"(Scientists) have established there might be a small amount of molten rock somewhere in the lower crust," Dr Handley said, explaining this small amount of magma could fuel a limited eruption.

"There is multiple ways molten rock can get to the surface.

"The amount of magma is enough to produce a lava flow that's tens of kilometres long, but it's not enough to build these long-lived mountains that last for thousands of years."

READ MORE: WWII 'ghost ships' appear in Japan after volcanic eruption

Australia's most recent eruptions

Three "geologically young" volcanoes have erupted in Australia within the last 10,000 years.

That time frame is the period in which volcanologists classify volcanoes as active with the potential of future of activity, Dr Handley explained.

Here pizza is on an active volcano baked

 Here pizza is on an active volcano baked Pacaya in Guatemala is a highly active volcano. But because the lava flows very slowly here usually, it has become a tourist hotspot. Also, because there is a unique specialty here. For a particularly courageous local cakes on the volcano pizza. TRAVEL BOOK spoke with him. © Getty Images Pizza For David García Mansilla, the day begins very early. At 5:30 am, to be exact.

Two of these are in South Australia in the Newer Volcanic Province; Mount Schank and Mount Gambier.

The other is the Kinrara Volcano, in north-east Queensland.


What an eruption could look like in Australia

Dr Handley said predicting the timing and exact location of the next eruption is near impossible.

"The youngest areas in Australia they're not focused on an individual volcano, what we have is a really big region that's potentially active," she said.

"The hard thing is we don't know where the next eruption could be.

"It could be anywhere within the field, from the data we have at the moment we don't see any patterns in space or time."

An eruption in Australia could take two forms; a pro-longed "oozing" eruption similar to Cumbre Vieja's eruption in the Spanish island of La Palma and Hawaii's Kilauea's volcano, or a more dramatic "ash-cloud" explosion.

The Cumbre Vieja eruption on La Palma has been going since 19 September. © AP The Cumbre Vieja eruption on La Palma has been going since 19 September.

It all depends on whether the magma interacts with ground water.

"If the magma comes up where it meets some cold water it could lead to explosive activity," Dr Handley said.

"It's akin to mixing hot cooking oil with cold water.

"You get an explosive reaction — and we have a lot of limestone that holds water."

Dr Handley said it's unlikely an eruption would hit a major city, and send lava flowing down metropolitan streets, but couldn't "100 per cent rule it out".

"The chances of it happening are very small — the field is very broad," she said.

"In the Newer Volcanic Province, we've had about 400 volcanoes erupting in the last million years or so.

"It just shows the chance of an eruption happening in a single human life-time is very small."

at the foot of the sowing volcano, a village of sand minors destroyed .
© AFP T days after the eruption of the Indonesian Volcano sowing, the nearest village, Curah Kobokan devastated by burning ashes, has ghostly pace Tuesday. Everything is covered with a gray layer, from the inside of the houses destroyed to the fallen trees. Many inhabitants, working with sand mines all close, did not have time to escape the deadly benefits. In total, in Curah Kobokan and in the region, the rescuers counted 34 dead and 17 missing, according to the last assessment.

usr: 5
This is interesting!