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Massive Earthquake Cluster in Antarctica Suggests Sleeping Volcano Awakening

There are some intriguing analyzes that have just come out about the massive swarm of earthquakes that occurred in Antarctica in 2020.

A ‘swarm’ of 85,000 earthquakes in Antarctica that lasted nearly six months in 2020 was triggered by magma from an underwater volcano, a new study says.

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The swarm took place at Orca Seamount, a deep-sea volcano near King George Island in Antarctica, in the Bransfield Strait, which has been inactive for ‘a long time’.

The researchers used seismometers and remote sensing techniques to determine how long the swarm lasted, and what caused it.

Swarm quakes occur mainly in volcanic active regions, so the movement of magma in the Earth’s crust is a suspected cause.

During the swarm, the ground on nearby King George Island moved 4.3 inches (11cm) – suggesting that a ‘finger’ of magma had almost reached the surface, the scientists report in their new study.

The international team of researchers said the swarm was the strongest earthquake activity recorded in the region.

“There have been similar intrusions in other places on Earth, but this is the first time we’ve examined it there,” said study co-author Simone Cesca, a seismologist at the GFZ German Research Center for Geosciences. , in Live Science.

“Typically, these processes occur at geologic time levels,” compared to over several months, Cesca said. “So in a way, we’re lucky to see it.”

Scientists have used a variety of methods to track the swarm and its geophysical effects, including analyzing data from seismic stations in the region and satellites orbiting the Earth.

This data sheds light on the potential causes of the large swarm. According to the researchers, the movement of magma in the crust may explain the seismic activity.

Human contributions to “climate change” are dwarfed by volcanoes. The size of volcanoes in the Antarctic is not well known, due to the challenges of studying at that latitude. However, there is a high probability that a super-volcano is under massive ice.

It’s not easy to see what’s going on at the bottom of Antarctica’s ice sheet.

On average, the ice thickness is 2.6km. At its deepest, it is 4.7km downhill.

So NASA took everything we know – from satellite and airborne observations to every piece of appropriate physics they could think of – and combined it all into one new simulation.

The final product of the calculations that reproduced the processes of friction, heat transport and behavior of liquid water revealed that there was another source of energy there.

A feather mantle fits the bill.

This mantle plume-some of which are known as supervolcanoes-emits approximately 200 milliwatts of energy per square meter.

Background heating from under the Earth in non-geologically active areas is approximately 40 to 60 milliwatts.

The bottom of Antarctica appears to be pretty much in the same league, up to 150 milliwatts.

Anything warmer and the simulations show ice melting too much to fit the observations — except somewhere near the Ross Sea.

Strong currents of water were seen here. The simulations require up to 180 milliwatts of energy to produce similar results.

And those concerned about climate extinction may want to consider the fact that the last time a super-volcano erupted, it nearly wiped out our species.

Professor Danisik and colleagues studied Lake Toba in Sumatra, a seemingly idyllic body of water that actually covers the caldera of a supervolcano, measuring approximately 100km by 30km (62 by 19 miles) in total. .

This supervolcano is believed to have erupted approximately 74,000 years ago, and some researchers believe the eruption released six billion tons of sulfur dioxide into the atmosphere, leading to global temperatures dropping by 15C (59F ) for three years thereafter.

While this scientific analysis of the impact of the eruption is controversial, scientists have suggested that the eruption caused a genetic bottleneck in human evolution.

The hypothesis is that between 50,000 and 100,000 years ago, the human population rapidly shrank to only 3,000-10,000 individuals, a claim for which there is some genetic evidence.

Because of the solid science behind the impact of volcanoes on Earth’s climate, I found out I couldn’t work about SUVs and cow farts.

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