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Noise that vibrates Earth dropped drastically after COVID-19 restrictions: study – iNFOnews

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A man crosses an empty street in downtown Montreal, Sunday, April 5, 2020. An international team of researchers used data from seismic stations in 117 countries to determine that restrictions aimed at preventing the spread of COVID-19 led to an unprecedented drop in noise.
Image Credit: THE CANADIAN PRESS/Graham Hughes

July 24, 2020 – 5:29 AM

VANCOUVER – An international team of researchers used data from seismic stations in 117 countries to determine that restrictions aimed at preventing the spread of COVID-19 led to an unprecedented drop in noise.

The study published Thursday in the journal Science shows seismic noise, or vibrations generated by human activity, dropped by as much as 50 per cent in March and April, particularly in urban areas.

Mika McKinnon, one of the study’s authors, said they’ve dubbed this quiet period the “anthropause,” as traffic, planes, cruise ships, conventions, concerts and sports games slowed or stopped.

“We could actually see very sharp cut off starting in China and Italy and then everywhere else as the pandemic spread and the policies and the lockdown spread,” said McKinnon, who teaches in the department of earth, ocean and atmospheric sciences at the University of British Columbia.

And while it was most pronounced in cities, McKinnon said the sound of silence could also be seen in data from an abandoned mine shaft in Germany that’s one of the quietest places on Earth.

A seismic station in Vancouver showed noise levels plummeted when the province closed schools, followed by bars, restaurants and other establishments, she said.

In nearby Seattle, seismic noise dropped later and returned sooner, she added.

“There is a different amount of background noise to start with. But if you look at the percentage decrease, people in Vancouver stayed at home much faster,” said McKinnon.

As the pandemic wears on, she said data from the quiet period will help scientists detect more earthquakes and allow them to better differentiate between human-caused and natural seismic noises.

“We’re getting a much better understanding of what these human-generated wave shapes are, which is going to make it easier in the future to be able to filter them back out again.”

McKinnon said the latest data won’t help predict if and when earthquakes will hit, but it does offer scientists deeper insight into the planet’s seismology and volcanic activity.

The seismic data is also reassuring, she said, because it shows many people are still making less noise while sticking closer to home and following public health guidelines during the pandemic.

The drop in noise is being measured in Earth’s oceans as well, said Richard Dewey, associate director of science at Ocean Networks Canada, based at the University of Victoria.

He likened the pandemic to an unplanned experiment for marine acoustic researchers who have been hoping for years for an opportunity to study the ocean without noise pollution from massive tankers, cruise ships, ferries, whale-watching and commercial-fishing vessels.

So far, data from two monitoring sites off the coast of Vancouver Island shows underwater noise dropped week by week, particlarly in April, as economic activity slowed down, said Dewey.

A quieter ocean is part of the formula that would help the recovery of endangered southern resident killer whales, which return each year to the Salish Sea around southern Vancouver Island, he said.

It’s a tall task to assess whether the orcas’ behaviour has changed in response to the drop in noise, said Dewey, since their calls are unique, and researchers only hear snippets when the southern residents travel past hydrophones that record them.

“We have a pod going by and sometimes you just hear a single whale vocalizing … and sometimes they’re all chatting at the same time. We don’t necessarily know how to interpret that.”

But the general hypothesis is that if the ocean were quieter, the whales could communicate with each other, navigate and assess their environment and acquire food more effectively, said Dewey.

He said researchers will look at data from before, during and after this quiet period to see if they can make distinctions between the meaning, frequency and density of the orcas’ calls.

This report by The Canadian Press was first published July 23, 2020.

News from © The Canadian Press, 2020

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The body of a Ugandan Olympic athlete who was set on fire by her partner is received by family

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NAIROBI, Kenya (AP) — The body of Ugandan Olympic athlete Rebecca Cheptegei — who died after being set on fire by her partner in Kenya — was received Friday by family and anti-femicide crusaders, ahead of her burial a day later.

Cheptegei’s family met with dozens of activists Friday who had marched to the Moi Teaching and Referral Hospital’s morgue in the western city of Eldoret while chanting anti-femicide slogans.

She is the fourth female athlete to have been killed by her partner in Kenya in yet another case of gender-based violence in recent years.

Viola Cheptoo, the founder of Tirop Angels – an organization that was formed in honor of athlete Agnes Tirop, who was stabbed to death in 2021, said stakeholders need to ensure this is the last death of an athlete due to gender-based violence.

“We are here to say that enough is enough, we are tired of burying our sisters due to GBV,” she said.

It was a somber mood at the morgue as athletes and family members viewed Cheptegei’s body which sustained 80% of burns after she was doused with gasoline by her partner Dickson Ndiema. Ndiema sustained 30% burns on his body and later succumbed.

Ndiema and Cheptegei were said to have quarreled over a piece of land that the athlete bought in Kenya, according to a report filed by the local chief.

Cheptegei competed in the women’s marathon at the Paris Olympics less than a month before the attack. She finished in 44th place.

Cheptegei’s father, Joseph, said that the body will make a brief stop at their home in the Endebess area before proceeding to Bukwo in eastern Uganda for a night vigil and burial on Saturday.

“We are in the final part of giving my daughter the last respect,” a visibly distraught Joseph said.

He told reporters last week that Ndiema was stalking and threatening Cheptegei and the family had informed police.

Kenya’s high rates of violence against women have prompted marches by ordinary citizens in towns and cities this year.

Four in 10 women or an estimated 41% of dating or married Kenyan women have experienced physical or sexual violence perpetrated by their current or most recent partner, according to the Kenya Demographic and Health Survey 2022.

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The ancient jar smashed by a 4-year-old is back on display at an Israeli museum after repair

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TEL AVIV, Israel (AP) — A rare Bronze-Era jar accidentally smashed by a 4-year-old visiting a museum was back on display Wednesday after restoration experts were able to carefully piece the artifact back together.

Last month, a family from northern Israel was visiting the museum when their youngest son tipped over the jar, which smashed into pieces.

Alex Geller, the boy’s father, said his son — the youngest of three — is exceptionally curious, and that the moment he heard the crash, “please let that not be my child” was the first thought that raced through his head.

The jar has been on display at the Hecht Museum in Haifa for 35 years. It was one of the only containers of its size and from that period still complete when it was discovered.

The Bronze Age jar is one of many artifacts exhibited out in the open, part of the Hecht Museum’s vision of letting visitors explore history without glass barriers, said Inbal Rivlin, the director of the museum, which is associated with Haifa University in northern Israel.

It was likely used to hold wine or oil, and dates back to between 2200 and 1500 B.C.

Rivlin and the museum decided to turn the moment, which captured international attention, into a teaching moment, inviting the Geller family back for a special visit and hands-on activity to illustrate the restoration process.

Rivlin added that the incident provided a welcome distraction from the ongoing war in Gaza. “Well, he’s just a kid. So I think that somehow it touches the heart of the people in Israel and around the world,“ said Rivlin.

Roee Shafir, a restoration expert at the museum, said the repairs would be fairly simple, as the pieces were from a single, complete jar. Archaeologists often face the more daunting task of sifting through piles of shards from multiple objects and trying to piece them together.

Experts used 3D technology, hi-resolution videos, and special glue to painstakingly reconstruct the large jar.

Less than two weeks after it broke, the jar went back on display at the museum. The gluing process left small hairline cracks, and a few pieces are missing, but the jar’s impressive size remains.

The only noticeable difference in the exhibit was a new sign reading “please don’t touch.”

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B.C. sets up a panel on bear deaths, will review conservation officer training

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VICTORIA – The British Columbia government is partnering with a bear welfare group to reduce the number of bears being euthanized in the province.

Nicholas Scapillati, executive director of Grizzly Bear Foundation, said Monday that it comes after months-long discussions with the province on how to protect bears, with the goal to give the animals a “better and second chance at life in the wild.”

Scapillati said what’s exciting about the project is that the government is open to working with outside experts and the public.

“So, they’ll be working through Indigenous knowledge and scientific understanding, bringing in the latest techniques and training expertise from leading experts,” he said in an interview.

B.C. government data show conservation officers destroyed 603 black bears and 23 grizzly bears in 2023, while 154 black bears were killed by officers in the first six months of this year.

Scapillati said the group will publish a report with recommendations by next spring, while an independent oversight committee will be set up to review all bear encounters with conservation officers to provide advice to the government.

Environment Minister George Heyman said in a statement that they are looking for new ways to ensure conservation officers “have the trust of the communities they serve,” and the panel will make recommendations to enhance officer training and improve policies.

Lesley Fox, with the wildlife protection group The Fur-Bearers, said they’ve been calling for such a committee for decades.

“This move demonstrates the government is listening,” said Fox. “I suspect, because of the impending election, their listening skills are potentially a little sharper than they normally are.”

Fox said the partnership came from “a place of long frustration” as provincial conservation officers kill more than 500 black bears every year on average, and the public is “no longer tolerating this kind of approach.”

“I think that the conservation officer service and the B.C. government are aware they need to change, and certainly the public has been asking for it,” said Fox.

Fox said there’s a lot of optimism about the new partnership, but, as with any government, there will likely be a lot of red tape to get through.

“I think speed is going to be important, whether or not the committee has the ability to make change and make change relatively quickly without having to study an issue to death, ” said Fox.

This report by The Canadian Press was first published Sept. 9, 2024.

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