Connect with us

Uncategorized

The Atacama Super Earthquake We Never Knew About Sending Humans Hiding for 1,000 Years

Published

on

 


Scientists said the massive earthquake that triggered the tsunami that struck northern Chile 3,800 years ago caused such devastation to coastal populations that it took 1,000 years for humans to return to shore.

The ancient super quake had a magnitude of about 9.5, and was so powerful that it caused a tsunami that threw boulders hundreds of meters into New Zealand, which is thousands of miles – and an entire ocean – away.

The discovery is evidenced by raised land structures (also known as coastal sediments) and samples of marine rock, shells, and marine life that the tsunami washed ashore in the higher stretches of Chile’s Atacama Desert. It serves as a dire warning of the destructive potential of the large earthquakes generated by tsunamis that may have escaped our previous notice.

“We found evidence of marine sediments and many animals that would have lived quietly at sea before being dumped inland,” says geologist and tsunami specialist James Goff of the University of New South Wales in Australia.

“And we found all of these things very high and far from land, so it couldn’t have been a storm that put them there.”

Tsunami deposits are visible in a trench. (University of Southampton)

The research team, led by anthropologist Diego Salazar of the University of Chile, has conducted several years of research in the Atacama Desert region, which is particularly vulnerable to massive earthquakes due to its proximity to the confluence of the Nazca and South American tectonic plates, with the former subjugated in the shadow of the latter.

It is this phenomenon and its seismic reactions that led to the most powerful earthquake ever recorded, the 1960 Valdivia earthquake in southern Chile; Thousands of years ago, the same tectonic tensions seem to have led to an equally diabolical but undocumented harbinger in the north of the country.

“It was thought that you couldn’t have an event of this magnitude in the north of the country just because you couldn’t get a rupture long enough,” Goff says.

“But now we’ve found evidence of a rupture about a thousand kilometers long off the coast of the Atacama Desert, and that’s massive.”

In their investigations, the researchers used radiocarbon dating to work out the age of the coastal sediments, which extend over 600 kilometers (about 370 miles) from the Chilean coast.

Readings from several sedimentation sites indicate the presence of a “tectonic event that would have lifted coastal sediments along the study area, and triggered social disruption on a regional scale,” the researchers wrote in their paper.

Collapsed stone structure. (Gabriel Easton)

At the time of the event, the people living in this part of the world were hunter-gatherer societies. Archaeological evidence indicates that the earthquake’s tsunami toppled their stone structures – not just once, but twice, with a powerful current of backwash from the tsunami wreaking havoc as it flowed back into the sea.

The effects on anyone lucky enough to survive the immediate catastrophe were long-lasting, with evidence to suggest that the area remained uninhabited for up to 1,000 years, even though people lived on this coastal strip for nearly 10,000 years before the crisis .

“The locals were left there with nothing,” Goff says. “Our archaeological work found that massive social disruption ensued as communities moved inland, out of reach of the tsunami.”

Over time and dozens of generations, locals grew bold (or perhaps forgetful), and people eventually made their way to the ocean some 1,000 years later.

“The abandonment of previously occupied areas and changes in mobility patterns and spatial arrangements of settlements and cemeteries may have been resilience strategies developed by hunter-gatherer societies,” the researchers wrote.

However, it seems that knowledge of these giant events and their consequences is waning over time.

Aside from filling in gaps in our historical understanding of this mega-event — an earthquake as powerful as anything known to humanity — the research is a cautionary note about the risks similarly powerful mega-earthquakes may pose in the future, say the researchers.

“While this had a huge impact on people in Chile, the South Pacific islands were uninhabited when they were hit by a tsunami 3800 years ago,” says Goff.

“But they are all inhabited now, and many are popular tourist destinations, so the next time an event like this occurs the consequences could be dire unless we learn from these results.”

The results are reported in Science Advances.

Sources

1/ https://Google.com/

2/ https://www.sciencealert.com/ferocious-super-quake-we-never-knew-about-sent-humans-into-hiding-for-1-000-years

The mention sources can contact us to remove/changing this article

What Are The Main Benefits Of Comparing Car Insurance Quotes Online

LOS ANGELES, CA / ACCESSWIRE / June 24, 2020, / Compare-autoinsurance.Org has launched a new blog post that presents the main benefits of comparing multiple car insurance quotes. For more info and free online quotes, please visit https://compare-autoinsurance.Org/the-advantages-of-comparing-prices-with-car-insurance-quotes-online/ The modern society has numerous technological advantages. One important advantage is the speed at which information is sent and received. With the help of the internet, the shopping habits of many persons have drastically changed. The car insurance industry hasn't remained untouched by these changes. On the internet, drivers can compare insurance prices and find out which sellers have the best offers. View photos The advantages of comparing online car insurance quotes are the following: Online quotes can be obtained from anywhere and at any time. Unlike physical insurance agencies, websites don't have a specific schedule and they are available at any time. Drivers that have busy working schedules, can compare quotes from anywhere and at any time, even at midnight. Multiple choices. Almost all insurance providers, no matter if they are well-known brands or just local insurers, have an online presence. Online quotes will allow policyholders the chance to discover multiple insurance companies and check their prices. Drivers are no longer required to get quotes from just a few known insurance companies. Also, local and regional insurers can provide lower insurance rates for the same services. Accurate insurance estimates. Online quotes can only be accurate if the customers provide accurate and real info about their car models and driving history. Lying about past driving incidents can make the price estimates to be lower, but when dealing with an insurance company lying to them is useless. Usually, insurance companies will do research about a potential customer before granting him coverage. Online quotes can be sorted easily. Although drivers are recommended to not choose a policy just based on its price, drivers can easily sort quotes by insurance price. Using brokerage websites will allow drivers to get quotes from multiple insurers, thus making the comparison faster and easier. For additional info, money-saving tips, and free car insurance quotes, visit https://compare-autoinsurance.Org/ Compare-autoinsurance.Org is an online provider of life, home, health, and auto insurance quotes. This website is unique because it does not simply stick to one kind of insurance provider, but brings the clients the best deals from many different online insurance carriers. In this way, clients have access to offers from multiple carriers all in one place: this website. On this site, customers have access to quotes for insurance plans from various agencies, such as local or nationwide agencies, brand names insurance companies, etc. "Online quotes can easily help drivers obtain better car insurance deals. All they have to do is to complete an online form with accurate and real info, then compare prices", said Russell Rabichev, Marketing Director of Internet Marketing Company. CONTACT: Company Name: Internet Marketing CompanyPerson for contact Name: Gurgu CPhone Number: (818) 359-3898Email: [email protected]: https://compare-autoinsurance.Org/ SOURCE: Compare-autoinsurance.Org View source version on accesswire.Com:https://www.Accesswire.Com/595055/What-Are-The-Main-Benefits-Of-Comparing-Car-Insurance-Quotes-Online View photos

ExBUlletin

to request, modification Contact us at Here or [email protected]